View MAX4210_155595.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-3285; Rev 0; 6/04
KITS ATION EVALU ABLE AVAIL
High-Side Power and Current Monitors
General Description Features
Real-Time Current and Power Monitoring 1.5% (max) Current-Sense Accuracy 1.5% (max) Power-Sense Accuracy Two Uncommitted Comparators (MAX4211) 1.21V Reference Output (MAX4211) Three Current/Power Gain Options 100mV/150mV Current-Sense Full-Scale Voltage +4V to +28V Input Source Voltage Range +2.7V to +5.5V Power-Supply Voltage Range Low Supply Current: 380A (MAX4210) 220kHz Bandwidth Small 6-Pin TDFN and 8-Pin MAX Packages (MAX4210)
MAX4210/MAX4211
The MAX4210/MAX4211 low-cost, low-power, high-side power/current monitors provide an analog output voltage proportional to the power consumed by a load by multiplying load current and source voltage. The MAX4210/MAX4211 measure load current by using a high-side current-sense amplifier, making them especially useful in battery-powered systems by not interfering with the ground path of the load. The MAX4210 is a small, simple 6-pin power monitor intended for limited board space applications. The MAX4210A/B/C integrate an internal 25:1 resistor-divider network to reduce component count. The MAX4210D/E/F use an external resistor-divider network for greater design flexibility. The MAX4211 is a full-featured current and power monitor. The device combines a high-side current-sense amplifier, 1.21V bandgap reference, and two comparators with open-drain outputs to make detector circuits for overpower, overcurrent, and/or overvoltage conditions. The open-drain outputs can be connected to potentials as high as 28V, suitable for driving high-side switches for circuit-breaker applications. Both the MAX4210/MAX4211 feature three different current-sense amplifier gain options: 16.67V/V, 25.00V/V, and 40.96V/V. The MAX4210 is available in 3mm x 3mm, 6-pin TDFN and 8-pin MAX(R) packages and the MAX4211 is available in 4mm x 4mm, 16-pin thin QFN and 16-pin TSSOP packages. Both parts are specified for the -40C to +85C extended operating temperature range.
Ordering Information
PART MAX4210AETT MAX4210AEUA TEMP RANGE -40C to +85C PIN-PACKAGE 6 TDFN-EP* (3mm x 3mm) TOP MARK AHF --
-40C to +85C 8 MAX
*EP = Exposed paddle. Ordering Information continued at end of data sheet.
Functional Diagrams
+
VSENSE RSENSE LOAD RS+ VCC 2.7V TO 5.5V RS-
-
Applications
Overpower Circuit Breakers Smart Battery Packs/Chargers Smart Peripheral Control Short-Circuit Protection Power-Supply Displays Measurement Instrumentation Baseband Analog Multipliers VGA Circuits Power-Level Detectors
4V TO 28V
+ -
+ -
25:1
IOUT POUT
1.21V REFERENCE INHIBIT
REF
CIN1+
COUT1 CIN1LE CIN2+ COUT2
MAX is a registered trademark of Maxim Integrated Products, Inc. Pin Configurations and Selector Guide appear at end of data sheet.
MAX4211A MAX4211B MAX4211C GND
CIN2-
Functional Diagrams continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
High-Side Power and Current Monitors MAX4210/MAX4211
ABSOLUTE MAXIMUM RATINGS
VCC, IN, CIN1, CIN2 to GND ....................................-0.3V to +6V RS+, RS-, INHIBIT, LE, COUT1, COUT2 to GND ...-0.3V to +30V IOUT, POUT, REF to GND ..........................-0.3V to (VCC + 0.3V) Differential Input Voltage (VRS+ - VRS-) .................................5V Maximum Current into Any Pin..........................................10mA Output Short-Circuit Duration to VCC or GND ........................10s Continuous Power Dissipation (TA = +70C) 6-Pin TDFN (derate 24.4mW/C above +70C) ..........1951mW 8-Pin MAX (derate 4.5mW/C above +70C) .............362mW 16-Pin TSSOP (derate 9.4mW/C above +70C) ..........754mW 16-Pin Thin QFN (derate 25mW/C above +70C) .....2000mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = 5.0V, VRS+ = 25V, VSENSE = 5mV, VIN = 1.0V, VLE = 0V, RIOUT = RPOUT = 1M, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = GND, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5k connected to VCC, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER Operating Voltage Range (Note 2) Common-Mode Input Range (Note 3) SYMBOL VCC VCMR Measured at RS+ TA = +25C, VCC = +5.5V VCC = +5.5V IRS+ IRSIIN IRS+, IRSVSENSE_FS VIN_FS VIN VSENSE = 0mV VSENSE = 0mV MAX421_D/E/F VCC = 0V MAX421_A/B/D/E MAX421_C/F MAX421_D/E/F, VSENSE = 10mV to 100mV MAX421_D/E/F, VSENSE = 10mV to 100mV MAX421_A/B/C, VSENSE = 10mV to 100mV VRS+ MAX421_A/B/C, VSENSE = 10mV to 100mV Current into IOUT = 10A Minimum IOUT/POUT Voltage VOUT_MIN VSENSE = 0V, VRS+ = 25V Current into IOUT = 100A Current into POUT = 10A Current into POUT = 100A Maximum IOUT/POUT Voltage (Note 6) VSENSE = 300mV, VRS+ = 25V Current out of IOUT = 500A Current out of POUT = 500A 150 100 1 0.16 25 4 1.5 2.5 1.5 2.5 80 VCC 0.25 VCC 0.25 80 mV 28 1.10 MAX4210 MAX4211 MAX4210 MAX4211 MAX421_A/B/C MAX421_D/E/F 14 3 3 -0.1 0.1 CONDITIONS MIN 2.7 4 380 670 TYP MAX 5.5 28 570 960 670 1100 25 8 8 -1 1 A A A mV V V V V A UNITS V V
Supply Current
ICC
Input Bias Current IN Input Bias Current Leakage Current VSENSE Full-Scale Voltage (Note 4) IN Full-Scale Voltage (Note 4) IN Input Voltage Range (Note 5) VRS+ Full-Scale Voltage (Note 4) VRS+ Input Voltage Range (Note 5)
VOUT_MAX
V
2
_______________________________________________________________________________________
High-Side Power and Current Monitors
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 5.0V, VRS+ = 25V, VSENSE = 5mV, VIN = 1.0V, VLE = 0V, RIOUT = RPOUT = 1M, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = GND, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5k connected to VCC, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER Current-Sense Amplifier Gain SYMBOL MAX4211A/D VIOUT/ VSENSE VPOUT/ (VSENSE x VRS+) Power-Sense Amplifier Gain VPOUT/ (VSENSE x VIN) IOUT Common-Mode Rejection POUT Common-Mode Rejection IOUT Power-Supply Rejection POUT Power-Supply Rejection Output Resistance for POUT, IOUT, REF IOUT -3dB Bandwidth CMRI CMRP PSRI PSRP ROUT BWIOUT/SENSE VSENSE = 100mV, VSENSE AC source VSENSE = 100mV, VIN AC source, MAX421_D/E/F VSENSE = 100mV, VRS+ AC source, MAX421_A/B/C No sustained oscillations MAX4211 VSENSE = 10mV to 100mV VSENSE = 100mV to 10mV VSENSE = 10mV to 100mV VSENSE = 100mV to 10mV MAX421_A/B/C VRS+ = 4V to 25V, VSENSE = 100mV VRS+ = 25V to 4V, VSENSE = 100mV VSENSE = 10mV to 100mV VSENSE = 100mV to 10mV MAX421_D/E/F VIN = 160mV to 1V, VSENSE = 100mV VIN = 1V to 160mV, VSENSE = 100mV MAX4211B/E MAX4211C/F MAX421_A MAX421_B MAX421_C MAX421_D MAX421_E MAX421_F MAX4211, VRS+ = 4V to 28V MAX421_D/E/F, VRS+ = 4V to 28V VCC = 2.7V to 5.5V VCC = 2.7V to 5.5V 60 60 58 58 CONDITIONS MIN TYP 16.67 25.00 40.96 0.667 1.00 1.64 16.67 25.00 40.96 80 80 80 70 0.5 220 220 500 250 450 15 15 10 10 15 15 10 10 10 10 s pF s kHz dB dB dB dB kHz 1/V V/V MAX UNITS
MAX4210/MAX4211
BWPOUT/SENSE VSENSE = 100mV, VSENSE AC source POUT -3dB Bandwidth BWPOUT/VIN BWPOUT/RS+ Capacitive-Load Stability (POUT, IOUT, REF) Current Output (IOUT) Settling Time to 1% of Final Value CLOAD
Power Output (POUT) Settling Time to 1% of Final Value
_______________________________________________________________________________________
3
High-Side Power and Current Monitors MAX4210/MAX4211
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 5.0V, VRS+ = 25V, VSENSE = 5mV, VIN = 1.0V, VLE = 0V, RIOUT = RPOUT = 1M, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = GND, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5k connected to VCC, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER Power-Up Time to 1% of Current Output Final Value Power-Up Time to 1% of Power Output Final Value Saturation Recovery Time for Current Out (Note 7) SYMBOL CONDITIONS VSENSE = 100mV, CLOAD = 10pF, MAX4211 VSENSE = 100mV, CLOAD = 10pF CLOAD = 10pF, VSENSE = -100mV to +100mV CLOAD = 10pF, VSENSE = 1.5V to 100mV Saturation Recovery Time for Power Out (Note 7) VCC = 5V, VRS+ = 10V, CLOAD = 10pF, VSENSE = -100mV to +100mV VCC = 5V, VRS+ = 10V, CLOAD = 10pF, VSENSE = 1.5V to 100mV VREF IREF = 0 to 100A, TA = +25C IREF = 0 to 100A, TA = -40C to +85C Common-mode voltage = REF 1.20 1.19 0.5 5 Functional test Functional test IBIAS VOL ISINK = 1mA VPULLUP = 28V VIH VIL 0.68 1.3 0.5 0.6 0.68 1 2.20 1 0.67 x VCC 0.33 x VCC 2.20 0.1 VCC 1.15 -2 0.2 0.6 1 MIN TYP 100 100 35 35 25 s 25 1.21 1.22 1.23 5 V mV mV V V nA V A V V A V V V A MAX UNITS s s
s
Reference Voltage Comparator Input Offset Comparator Hysteresis Comparator Common-Mode Low Comparator Common-Mode High Comparator Input Bias Current Comparator Output Low Voltage Comparator Output-High Leakage Current (Note 8) LE Logic Input-High Voltage Threshold LE Logic Input-Low Voltage Threshold LE Logic Input Internal Pulldown Current INHIBIT Logic Input-High Voltage Threshold INHIBIT Logic Input-Low Voltage Threshold INHIBIT Logic Input Hysteresis INHIBIT Logic Input Internal Pulldown Current
4
_______________________________________________________________________________________
High-Side Power and Current Monitors
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 5.0V, VRS+ = 25V, VSENSE = 5mV, VIN = 1.0V, VLE = 0V, RIOUT = RPOUT = 1M, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = GND, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5k connected to VCC, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER Comparator Propagation Delay Minimum INHIBIT Pulse Width Minimum LE Pulse Width Comparator Power-Up Blanking Time From VCC LATCH Setup Time tON tSETUP VCC from 0 to (2.7V to 5.5V) SYMBOL tPD+, tPDCONDITIONS CLOAD = 10pF, RLOAD = 10k pullup to VCC, 5mV overdrive MIN TYP 4 1 1 300 3 0.5 1.5 3.0 0.5 1.5 3.0 0.15 1.5 % FSO* TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 2.5 1.2 1.8 1.8 1.5 5 15 0.5 1.5 3.0 0.5 1.5 3.0 % mV 0.2 3.0 1.5 3.0 % % MAX UNITS s s s s s
MAX4210/MAX4211
MAX4210A/MAX4211A (power gain = 0.667) VPOUT/ VSENSE VPOUT/ VRS+ VPOUT_MAX/ FSO VSENSE = 10mV to 100mV, VRS+ = 25V VSENSE = 100mV, VRS+ = 5V to 25V VSENSE = 5mV to 100mV, VRS+ = 5V to 25V VSENSE = 150mV, VRS+ 15V VPOUT_MAX/ VPOUT TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C
POUT Gain Accuracy (Note 9)
Total POUT Output Error (Note 10)
VSENSE = 100mV, VRS+ 4V VSENSE = 100mV, VRS+ 9V VSENSE = 50mV, VRS+ 6V VSENSE = 25mV, VRS+ 15V
POUT Output Offset Voltage (Note 11) MAX4210B/MAX4211B (power gain = 1.00) VPOUT/ VSENSE VPOUT/ VRS+
VSENSE = 0V, VRS+ = 25V
TA = +25C TA = TMIN to TMAX
POUT Gain Accuracy (Note 9)
VSENSE = 10mV to 100mV, VRS+ = 25V VSENSE = 100mV, VRS+ = 5V to 25V
TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX
*FSO refers to full-scale output under the conditions: VSENSE = 100mV, VRS+ = +25V, or VIN = 1V.
_______________________________________________________________________________________
5
High-Side Power and Current Monitors MAX4210/MAX4211
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 5.0V, VRS+ = 25V, VSENSE = 5mV, VIN = 1.0V, VLE = 0V, RIOUT = RPOUT = 1M, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = GND, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5k connected to VCC, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL VPOUT_MAX/ FSO CONDITIONS VSENSE = 5mV to TA = +25C 100mV, VRS+ = 5V to TA = TMIN to TMAX 25V VSENSE = 150mV, VRS+ > 15V VPOUT_MAX/ VPOUT TA = +25C TA = TMIN to TMAX 2.5 1.2 1.8 1.8 2 6.5 20 0.5 1.5 3.0 0.5 1.5 3.0 0.15 1.5 3.0 2.5 1.2 1.8 1.8 3 10 30 0.5 1.5 3.0 0.5 1.5 3.0 % mV % % FSO* % mV MIN TYP 0.15 MAX 1.5 3.0 0.2 1.5 3.0 % UNITS % FSO*
Total POUT Output Error (Note 10)
VSENSE = 100mV, VRS+ > 4V VSENSE = 100mV, VRS+ > 9V VSENSE = 50mV, VRS+ > 6V VSENSE = 25mV, VRS+ > 15V
POUT Output Offset Voltage (Note 11) MAX4210C/MAX4211C (power gain = 1.64) VPOUT/ VSENSE VPOUT/ VRS+ VPOUT_MAX/ FSO Total POUT Output Error (Note 10)
VSENSE = 0V, VRS+ = 25V
TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX
POUT Gain Accuracy (Note 9)
VSENSE = 10mV to 100mV, VRS+ = 25V VSENSE = 100mV, VRS+ = 5V to 25V VSENSE = 5mV to 100mV, VRS+ = 5V to 25V
VSENSE = 100mV, VRS+ 4V VPOUT_MAX/ VPOUT VSENSE = 100mV, VRS+ 9V VSENSE = 50mV, VRS+ 6V VSENSE = 25mV, VRS+ 15V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX
POUT Output Offset Voltage (Note 11) MAX4210D/MAX4211D (power gain = 16.67) VPOUT/ VSENSE VPOUT/ VIN
VSENSE = 0V, VRS+ = 25V
POUT Gain Accuracy (Note 9)
VSENSE = 10mV to 100mV, VIN = 1V VSENSE = 100mV, VIN = 0.2V to 1V
*FSO refers to full-scale output under the conditions: VSENSE = 100mV, VRS+ = +25V, or VIN = 1V.
6
_______________________________________________________________________________________
High-Side Power and Current Monitors
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 5.0V, VRS+ = 25V, VSENSE = 5mV, VIN = 1.0V, VLE = 0V, RIOUT = RPOUT = 1M, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = GND, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5k connected to VCC, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL VPOUT_MAX/ FSO CONDITIONS VSENSE = 5mV to 100mV, VRS+ = 25V, VIN = 0.2V to 1V TA = +25C TA = TMIN to TMAX 0.2 MIN TYP 0.15 MAX 1.5 3.0 1.5 3.0 2.5 1.2 1.8 1.8 1.5 5 15 0.5 0.5 0.15 1.5 3.0 1.5 3.0 1.5 % FSO* TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 2.5 1.2 1.8 1.8 2 6.5 20 mV % 0.2 3.0 1.5 3.0 % mV % % FSO* UNITS
MAX4210/MAX4211
VSENSE = 150mV, VRS+ TA = +25C = 25V, VIN = 600mV TA = TMIN to TMAX Total POUT Output Error (Note 10) VSENSE = 100mV, VRS+ = 15V, VIN 160mV VPOUT_MAX/ VPOUT VSENSE = 100mV, VRS+ = 15V, VIN 360mV VSENSE = 50mV, VRS+ = 15V, VIN 240mV VSENSE = 25mV, VRS+ = 15V, VIN 600mV POUT Output Offset Voltage (Note 11) MAX4210E/MAX4211E (power gain = 25.00) POUT Gain Accuracy (Note 9) VPOUT/ VSENSE VPOUT/ VIN VPOUT_MAX/ FSO VSENSE = 10mV to 100mV, VIN = 1V VSENSE = 100mV, VIN = 0.2V to 1V VSENSE = 5mV to 100mV, VRS+ = 25V, VIN = 0.2V to 1V VSENSE = 150mV, VRS+ =25V, VIN = 600mV Total POUT Output Error (Note 10) TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C VSENSE = 0V, VRS+ = 25V, VIN = 1V TA = +25C TA = TMIN to TMAX
VPOUT_MAX/ VPOUT
VSENSE = 100mV, VRS+ = 15V, VIN 160mV VSENSE = 100mV, VRS+ = 15V, VIN 360mV VSENSE = 50mV, VRS+ = 15V, VIN 240mV VSENSE = 25mV, VRS+ = 15V, VIN 600mV
POUT Output Offset Voltage (Note 11)
VSENSE = 0V, VRS+ = 25V, VIN = 1V
TA = +25C TA = TMIN to TMAX
*FSO refers to full-scale output under the conditions: VSENSE = 100mV, VRS+ = +25V, or VIN = 1V.
_______________________________________________________________________________________
7
High-Side Power and Current Monitors MAX4210/MAX4211
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 5.0V, VRS+ = 25V, VSENSE = 5mV, VIN = 1.0V, VLE = 0V, RIOUT = RPOUT = 1M, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = GND, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5k connected to VCC, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL VPOUT/ VSENSE VPOUT/ VIN VPOUT_MAX/ FSO CONDITIONS VSENSE = 10mV to 100mV, VIN = 1V VSENSE = 100mV, VIN = 0.2V to 1V VSENSE = 5mV to 100mV, VRS+ = 25V, VIN = 0.2V to 1V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 2.5 1.2 % 1.8 1.8 3 10 30 0.5 0.15 0.2 1.2 1.8 20 1.5 3.0 1.5 3.0 1.5 3.0 % mV 0.15 0.5 MIN TYP 0.5 MAX 1.5 3.0 1.5 3.0 1.5 3.0 % FSO* % UNITS
MAX4210F/MAX4211F (power gain = 40.96) POUT Gain Accuracy (Note 9)
VSENSE = 100mV, VRS+ = 15V, VIN 160mV Total POUT Output Error (Note 10) VPOUT_MAX/ VPOUT VSENSE = 100mV, VRS+ = 15V, VIN 360mV VSENSE = 50mV, VRS+ = 15V, VIN 240mV VSENSE = 25mV, VRS+ = 15V, VIN 600mV POUT Output Offset Voltage (Note 11) MAX4211A/MAX4211D (current gain = 16.67) IOUT Gain Accuracy VIOUT/ VSENSE VIOUT_MAX/ FSO Total IOUT Output Error (Note 10) VSENSE = 20mV to 100mV, VRS+ = 25V VSENSE = 5mV to 100mV VSENSE = 150mV VIOUT_MAX/ VIOUT VSENSE = 50mV VSENSE = 25mV VSENSE = 5mV TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA= TMIN to TMAX VSENSE = 0V, VRS+ = 25V, VIN = 1V TA = +25C TA = TMIN to TMAX
% % FSO*
*FSO refers to full-scale output under the conditions: VSENSE = 100mV, VRS+ = +25V, or VIN = 1V.
8
_______________________________________________________________________________________
High-Side Power and Current Monitors
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 5.0V, VRS+ = 25V, VSENSE = 5mV, VIN = 1.0V, VLE = 0V, RIOUT = RPOUT = 1M, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = GND, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5k connected to VCC, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL VIOUT/ VSENSE VIOUT_MAX/ FSO Total IOUT Output Error (Note 10) CONDITIONS TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 1.2 1.8 20 TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 1.2 1.8 20 0.2 0.15 0.5 1.5 3.0 1.5 3.0 1.5 3.0 % 0.2 0.15 MIN TYP 0.5 MAX 1.5 3.0 1.5 3.0 1.5 3.0 % UNITS
MAX4210/MAX4211
MAX4211B/MAX4211E (current gain = 25.00) IOUT Gain Accuracy VSENSE = 20mV to 100mV, VRS+ = 25V VSENSE = 5mV to 100mV VSENSE = 150mV VIOUT_MAX/ VIOUT VSENSE = 50mV VSENSE = 25mV VSENSE = 5mV MAX4211C/MAX4211F (current gain = 40.96) IOUT Gain Accuracy VIOUT/ VSENSE VIOUT_MAX/ FSO Total IOUT Output Error (Note 10) VSENSE = 20mV to 100mV, VRS+ =25V VSENSE = 5mV to 100mV VSENSE = 100mV VIOUT_MAX/ VIOUT VSENSE = 50mV VSENSE = 25mV VSENSE = 5mV % % FSO* % % FSO*
*FSO refers to full-scale output under the conditions: VSENSE = 100mV, VRS+ = +25V, or VIN = 1V. All devices are 100% production tested at TA = +25C. All temperature limits are guaranteed by design. Guaranteed by power-supply rejection test. Guaranteed by output voltage error tests (IOUT). Guaranteed by output voltage error tests (IOUT or POUT, or both). IN Input Voltage Range (MAX421_D/E/F) and VRS+ Input Voltage Range (MAX421_A/B/C) are guaranteed by design (GBD) and not production tested. See Multiplier Transfer Characteristics graphs in the Typical Operating Characteristics. Note 6: This test does not apply to the low gain options, MAX421_A/D, because OUT is clamped at approximately 4V. Note 7: The device does not experience phase reversal when overdriven. Note 8: VPULLUP is defined as an externally applied voltage through a resistor, RPULLUP, to pull up the comparator output. Note 9: POUT gain accuracy is the sum of gain error and multiplier nonlinearity. Note 10: Total output voltage error is the sum of gain and offset voltage errors. Note 11: POUT Output Offset Voltage is the sum of offset and multiplier feedthrough. Note 1: Note 2: Note 3: Note 4: Note 5:
_______________________________________________________________________________________
9
High-Side Power and Current Monitors MAX4210/MAX4211
Typical Operating Characteristics
(VCC = 5.0V, VRS+ = 25V, VSENSE = 100mV, VIN = 1V, VLE = 0V, RIOUT = RPOUT = 1M, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = 0V, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5k connected to VCC, TA = +25C, unless otherwise noted.)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4210/11 toc01
SUPPLY CURRENT vs. COMMON-MODE VOLTAGE
MAX4210/11 toc02
MAX4210 SUPPLY CURRENT vs. TEMPERATURE
VSENSE = 5mV VCC = 5V VCC = 4.0V
MAX4210/11 toc03
0.8 VSENSE = 5mV 0.7 SUPPLY CURRENT (mA) MAX4211
0.8 0.7 SUPPLY CURRENT (mA) 0.6 0.5 0.4 0.3 0.2 MAX4210 VSENSE = 5mV VCC = 5V MAX4211
0.50 0.45 SUPPLY CURRENT (mA) 0.40 0.35 0.30 0.25 0.20
VCC = 5.5V
0.6
0.5 MAX4210
VCC = 2.7V
0.4
0.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 SUPPLY VOLTAGE (V)
4
8
12
16
20
24
28
-40
-15
10
35
60
85
RS+ VOLTAGE (V)
TEMPERATURE (C)
MAX4211 SUPPLY CURRENT vs. TEMPERATURE
VSENSE = 5mV VCC = 5.5V VCC = 4.0V
MAX4210/11 toc04
RS+/RS- BIAS CURRENT vs. TEMPERATURE
MAX4210/11 toc05
RS+/RS- BIAS CURRENT vs. COMMON-MODE VOLTAGE
14 RS+ (A/B/C VERSIONS) BIAS CURRENT (A) 12 10 8 6 4 2 RSVRS+ = VRSMAX4210/11 toc06
0.8
16 14 BIAS CURRENT (A) 12 10 8 6 4 2 RS+ (D/E/F VERSIONS) RSRS+ (A/B/C VERSIONS) VRS+ = VRS- = 25V
16
0.7 SUPPLY CURRENT (mA)
0.6
0.5 VCC = 2.7V 0.4
RS+ (D/E/F VERSIONS) 0 85 4 8 12 16 20 24 28
0.3 -40 -15 10 35 60 85 TEMPERATURE (C)
0 -40 -15 10 35 60 TEMPERATURE (C)
COMMON-MODE VOLTAGE (V)
POWER OUTPUT ERROR vs. SUPPLY VOLTAGE
MAX4210/11 toc07
CURRENT OUTPUT ERROR vs. SUPPLY VOLTAGE
MAX4210/11 toc08
POWER OUTPUT ERROR vs. SENSE VOLTAGE
-0.2 -0.4 OUTPUT ERROR (%) -0.6 -0.8 -1.0 -1.2 -1.4 -1.6 TA = +25C TA = +85C TA = 0C TA = -40C
MAX4210/11 toc09
0 -0.1 OUTPUT ERROR (%) -0.2 -0.3 -0.4 -0.5 TA = +85C -0.6 -0.7 -0.8 2.7 3.1 3.5 3.9 4.3 4.7 5.1 TA = +25C TA = -40C
0 -0.1 OUTPUT ERROR (%) -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 TA = 0C TA = +85C TA = -40C TA = +25C
0
TA = 0C
-1.8 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 -2.0 0 25 50 75 100 125 150 SENSE VOLTAGE (mV)
5.5
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
10
______________________________________________________________________________________
High-Side Power and Current Monitors
Typical Operating Characteristics (continued)
(VCC = 5.0V, VRS+ = 25V, VSENSE = 100mV, VIN = 1V, VLE = 0V, RIOUT = RPOUT = 1M, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = 0V, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5k connected to VCC, TA = +25C, unless otherwise noted.)
CURRENT OUTPUT ERROR vs. SENSE VOLTAGE
MAX4210/11 toc10
MAX4210/MAX4211
POWER OUTPUT ERROR vs. VRS+
MAX4210/11 toc11
POWER OUTPUT ERROR vs. IN VOLTAGE
-0.2 -0.4 OUTPUT ERROR (%) -0.6 -0.8 -1.0 -1.2 -1.4 -1.6 TA = 0C TA = +85C TA = +25C
MAX4210/11 toc12
0 -0.2 -0.4 OUTPUT ERROR (%) -0.6 -0.8 -1.0 -1.2 -1.4 -1.6 -1.8 -2.0 0 25 50 75 100 125 TA = +85C TA = +25C TA = -40C TA = 0C
1.0 0.8 0.6 OUTPUT ERROR (%) 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 MAX4211B 4 7 10 13 16 19 22 TA = +25C TA = +85C TA = 0C TA = -40C
0 TA = -40C
-1.8 -2.0 25 0 200 400 600 800 1000 1200 VRS+ VOLTAGE (V) IN VOLTAGE (mV)
150
SENSE VOLTAGE (mV)
POWER GAIN vs. TEMPERATURE
MAX4210/11 toc13
CURRENT GAIN vs. TEMPERATURE
MAX4210/11 toc14
MULTIPLIER TRANSFER CHARACTERISTICS
MAX4211D 2.0 POUT VOLTAGE (V) VSENSE = 100mV
MAX4210/11 toc15
25.10 25.05 25.00 GAIN (1/V) 24.95 24.90 24.85 24.80 -40
MAX4211E
25.00 24.95 CURRENT GAIN (V/V) 24.90 24.85 24.80 24.75 24.70
2.5
MAX4211E
1.5
VSENSE = 70mV VSENSE = 30mV
1.0
0.5
0 -40 -15 10 35 60 85 0 0.3 0.6 0.9 1.2 1.5 TEMPERATURE (C) IN VOLTAGE (V)
-15
10
35
60
85
TEMPERATURE (C)
MULTIPLIER TRANSFER CHARACTERISTICS
MAX4210/11 toc16
MULTIPLIER TRANSFER CHARACTERISTICS
MAX4210/11 toc17
REFERENCE VOLTAGE vs. SUPPLY VOLTAGE
MAX4210/11 toc18
5 MAX4211B 4 POUT VOLTAGE (V) VRS+ = 25V 3 VRS+ = 15V
3.0 2.5 POUT VOLTAGE (V) 2.0 1.5 1.0 0.5 0
MAX4211B VSENSE = 100mV
1.220
REFERENCE VOLTAGE (V)
1.215
VSENSE = 70mV VSENSE = 30mV
1.210
2 VRS+ = 4V 1
1.205
0 0 50 100 150 200 250 300 SENSE VOLTAGE (mV)
1.200 4 8 12 16 20 24 28 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 RS+ VOLTAGE (V) SUPPLY VOLTAGE (V)
______________________________________________________________________________________
11
High-Side Power and Current Monitors MAX4210/MAX4211
Typical Operating Characteristics (continued)
(VCC = 5.0V, VRS+ = 25V, VSENSE = 100mV, VIN = 1V, VLE = 0V, RIOUT = RPOUT = 1M, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = 0V, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5k connected to VCC, TA = +25C, unless otherwise noted.)
REFERENCE VOLTAGE vs. TEMPERATURE
MAX4210/11 toc19
COMPARATOR PROPAGATION DELAY vs. OVERDRIVE VOLTAGE
MAX4210/11 toc20
COMPARATOR PROPAGATION DELAY vs. TEMPERATURE
MAX4210/11 toc21
1.220
1.8 1.6 PROPAGATION DELAY (s) 1.4 1.2 1.0 0.8 0.6 0.4 0.2
1.8 1.6 PROPAGATION DELAY (s) 1.4 1.2 1.0 0.8
REFERENCE VOLTAGE (V)
1.215
1.210
1.205
1.200 -40 -15 10 35 60 85 TEMPERATURE (C)
0 0 50 100 150 200 OVERDRIVE VOLTAGE (mV)
0.6 -40 -15 10 35 60 85 TEMPERATURE (C)
COMPARATOR OUTPUT VOLTAGE (VOL) vs. CURRENT SINK
MAX4210/11 toc22
COMPARATOR OUTPUT VOLTAGE (VOL) vs. TEMPERATURE
CURRENT SINK = 1mA 350 COUT VOLTAGE (mV) 300 250 200
MAX4210/11 toc23
COMPARATOR POWER-UP DELAY
MAX4210/11 toc24
600 500 COUT VOLTAGE (mV) 400 300 200 100 0 0 1 2 CURRENT SINK (mA) 3 4
400
5V VCC 2V/div 0V
5V 150 100 50 0 -40 -15 10 35 60 85 200s/div TEMPERATURE (C) COUT 2V/div 0V
COMPARATOR PROPAGATION DELAY
MAX4210/11 toc25
COMPARATOR AC RESPONSE
MAX4210/11 toc26
POUT POWER-UP DELAY
MAX4210/11 toc27
VOD = 5mV VCIN+
CIN- = 1.21V
MAX4211E 1.45V CIN+
5V VCC 2V/div 0V
0.95V 5V COUT 2V/div 0V 5V COUT 2V/div 0V 200s/div
2.5V POUT 1V/div 0V
2s/div
4s/div
12
______________________________________________________________________________________
High-Side Power and Current Monitors
Typical Operating Characteristics (continued)
(VCC = 5.0V, VRS+ = 25V, VSENSE = 100mV, VIN = 1V, VLE = 0V, RIOUT = RPOUT = 1M, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = 0V, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5k connected to VCC, TA = +25C, unless otherwise noted.)
IOUT POWER-UP DELAY
MAX4210/11 toc28
MAX4210/MAX4211
VCC POWER-UP/DOWN RESPONSE POUT
MAX4210/11 toc29
MAX4211E
5V VCC 2V/div 0V
VSENSE = 150mV MAX4211E VCC 2V/div
0V 2.5V IOUT 1V/div 0V 200s/div POUT 2V/div 0V 2ms/div
VCC POWER-UP/DOWN RESPONSE IOUT
VSENSE = 150mV MAX4211E
RS POWER-UP/DOWN RESPONSE POUT
MAX4210/11 toc31
MAX4210/11 toc30
VCC 2V/div VSENSE 0V
10V VRS+ 5V/div 0V 2.5V
IOUT 2V/div 0V
POUT 1V/div 0V
2ms/div
20ms/div
RS POWER-UP/DOWN RESPONSE IOUT
MAX4210/11 toc32
POUT SMALL-SIGNAL PULSE RESPONSE
MAX4210/11 toc33
10V VRS+ 5V/div 0V 2.5V IOUT 1V/div 0V 20ms/div 10s/div 470pF LOAD
VSENSE = 10mV TO 20mV STEP
POUT 100mV/div
______________________________________________________________________________________
13
High-Side Power and Current Monitors MAX4210/MAX4211
Typical Operating Characteristics (continued)
(VCC = 5.0V, VRS+ = 25V, VSENSE = 100mV, VIN = 1V, VLE = 0V, RIOUT = RPOUT = 1M, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = 0V, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5k connected to VCC, TA = +25C, unless otherwise noted.)
IOUT SMALL-SIGNAL PULSE RESPONSE
MAX4210/11 toc34
POUT LARGE-SIGNAL PULSE RESPONSE
MAX4210/11 toc35
470pF LOAD VSENSE = 10mV TO 20mV STEP VSENSE = 10mV TO 90mV STEP
470pF LOAD IOUT 100mV/div POUT 1V/div
10s/div
10s/div
IOUT LARGE-SIGNAL PULSE RESPONSE
MAX4210/11 toc36
POUT SLEW-RATE PULSE RESPONSE
MAX4210/11 toc37
470pF LOAD VSENSE = 10mV TO 90mV STEP
NO LOAD VSENSE = 10mV TO 90mV STEP
POUT 1V/div
POUT 1V/div
10s/div
10s/div
IOUT SLEW-RATE PULSE RESPONSE
MAX4210/11 toc38
POUT COMMON-MODE REJECTION RATIO vs. FREQUENCY
VSENSE = 100mV VSENSE = 10mV TO 90mV STEP CMRR (dB) -30 -40 -50 -60 -70 -80 -90 0.001
MAX4210/11 toc39
NO LOAD
-20
IOUT 1V/div
10s/div
0.01
0.1
1
FREQUENCY (MHz)
14
______________________________________________________________________________________
High-Side Power and Current Monitors
Typical Operating Characteristics (continued)
(VCC = 5.0V, VRS+ = 25V, VSENSE = 100mV, VIN = 1V, VLE = 0V, RIOUT = RPOUT = 1M, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = 0V, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5k connected to VCC, TA = +25C, unless otherwise noted.)
IOUT COMMON-MODE REJECTION RATIO vs. FREQUENCY
VSENSE = 100mV -30 -40 CMRR (dB) -50 -60 -70 -80 -90 0.001 PSR (dB)
MAX4210/11 toc40
MAX4210/MAX4211
POWER-SUPPLY REJECTION vs. FREQUENCY
-10 -20 -30 -40 -50 -60 -70 -80 10 100 1k FREQUENCY (Hz) 10k 100k 5 0 0.001
MAX4210/11 toc41
POUT SMALL-SIGNAL GAIN vs. FREQUENCY
MAX4210/11 toc42
-20
0
30 25 20 GAIN (dB) 15 10 VSENSE = 10mVP-P
0.01
0.1
1
0.01
0.1 FREQUENCY (MHz)
1
10
FREQUENCY (MHz)
IOUT SMALL-SIGNAL GAIN vs. FREQUENCY
MAX4210/11 toc43
POUT LARGE-SIGNAL GAIN vs. FREQUENCY
VSENSE = 90mVP-P
MAX4210/11 toc44
30 25 20 GAIN (dB) 15 10 5 0 0.001 VSENSE = 10mVP-P
30 25 20 GAIN (dB) 15 10 5 0 0.001
0.01
0.1 FREQUENCY (MHz)
1
10
0.01
0.1
1
FREQUENCY (MHz)
IOUT LARGE-SIGNAL GAIN vs. FREQUENCY
MAX4210/11 toc45
IN SMALL-SIGNAL GAIN vs. FREQUENCY
MAX4210/11 toc46
30 25 20 GAIN (dB) 15 10 5 0 0.001 VSENSE = 90mVP-P
5
0
GAIN (dB)
-5
VIN = 10mVP-P MEASURED AT POUT VSENSE = 40mV
-10
-15
0.01
0.1
1
-20 0.001
0.01
0.1 FREQUENCY (MHz)
1
10
FREQUENCY (MHz)
______________________________________________________________________________________
15
High-Side Power and Current Monitors MAX4210/MAX4211
MAX4210A/B/C Pin Description
PIN 6 TDFN 1 2 3 4 5 6 EP 8 MAX 1 2, 3, 6 4 5 7 8 -- NAME GND N.C. VCC RS+ RSPOUT EP* Ground No Connection. Not internally connected. Power-Supply Voltage. Connect a 0.1F bypass capacitor from VCC to GND. Power Connection to External-Sense Resistor and Internal Resistor-Divider Load-Side Connection for External-Sense Resistor Power Output Voltage. Voltage output proportional to source power (input voltage multiplied by load current). Exposed Paddle. EP is internally connected to GND. FUNCTION
*TDFN package only.
MAX4210D/E/F Pin Description
PIN 6 TDFN 1 2 3 4 5 6 EP -- 8 MAX 1 2 4 5 7 8 -- 3, 6 NAME GND IN VCC RS+ RSPOUT EP* N.C. Ground Multiplier Input Voltage. Voltage input for internal multiplier. Power-Supply Voltage. Connect a 0.1F bypass capacitor from VCC to GND. Power Connection to External-Sense Resistor Load-Side Connection for External-Sense Resistor Power Output Voltage. Voltage output proportional to source power (input voltage multiplied by load current). Exposed Paddle. EP is internally connected to GND. No Connection. Not internally connected. FUNCTION
*TDFN package only.
16
______________________________________________________________________________________
High-Side Power and Current Monitors
MAX4211A/B/C Pin Description
PIN 16 THIN QFN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 EP 16 TSSOP 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 2 -- NAME VCC N.C. LE COUT1 INHIBIT COUT2 GND CIN2+ CIN2CIN1+ CIN1REF POUT IOUT RSRS+ EP* FUNCTION Power-Supply Voltage. Connect a 0.1F bypass capacitor from VCC to GND. No Connection. Not internally connected. Latch Enable for Comparator 1. Driving logic low makes the comparator transparent (regular comparator). Driving logic high latches the output. Open-Drain Comparator 1 Output. LE and INHIBIT control the comparator 1 output. INHIBIT for Comparator 1 Output. Driving logic high inhibits the comparator operation. Drive logic low for normal operation. Open-Drain Comparator 2 Output Ground Comparator 2 Positive Input Comparator 2 Negative Input Comparator 1 Positive Input Comparator 1 Negative Input 1.21V Internal Reference Output Power Output Voltage. Voltage output proportional to source power (input voltage multiplied by load current). Current Output Voltage. Voltage output proportional to VSENSE (VRS+ - VRS-) load current. Load-Side Connection for External-Sense Resistor Power Connection to External-Sense Resistor and Internal Resistor-Divider Exposed Paddle. EP is internally connected to GND.
MAX4210/MAX4211
*Thin QFN package only.
______________________________________________________________________________________
17
High-Side Power and Current Monitors MAX4210/MAX4211
MAX4211D/E/F Pin Description
PIN 16 THIN QFN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 EP 16 TSSOP 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 2 -- NAME VCC IN LE COUT1 INHIBIT COUT2 GND CIN2+ CIN2CIN1+ CIN1REF POUT IOUT RSRS+ EP* FUNCTION Power-Supply Voltage. Connect a 0.1F bypass capacitor from VCC to GND. Multiplier Input Voltage. Voltage input for internal multiplier. Latch Enable for Comparator 1. Driving logic low makes the comparator transparent (regular comparator). Driving logic high latches the output. Open-Drain Comparator 1 Output. Output controlled by LE and INHIBIT. INHIBIT for Comparator 1 Output. Driving logic high inhibits the comparator operation. Drive logic low for normal operation. Open-Drain Comparator 2 Output Ground Comparator 2 Positive Input Comparator 2 Negative Input Comparator 1 Positive Input Comparator 1 Negative Input 1.21V Internal Reference Output Power Output Voltage. Voltage output proportional source power (input voltage multiplied by load current). Current Output Voltage. Voltage output proportional VSENSE (VRS+ - VRS-) load current. Load-Side Connection for External-Sense Resistor Power Connection to External-Sense Resistor Exposed Paddle. EP is internally connected to GND.
*Thin QFN package only.
Functional Diagrams
+
4V TO 28V VSENSE RSENSE LOAD RS+ VCC 2.7V TO 5.5V RSVCC 2.7V TO 5.5V
4V TO 28V
+ + RS+
VSENSE RSENSE
LOAD RS-
+ -
+ -
+ MAX4210D MAX4210E MAX4210F
25:1 POUT 0 TO 1V MAX4210A MAX4210B MAX4210C GND IN
POUT
+ -
GND
18
______________________________________________________________________________________
High-Side Power and Current Monitors
Functional Diagrams (continued)
+
4V TO 28V VSENSE RSENSE LOAD RS+ VCC 2.7V TO 5.5V RSVCC 2.7V TO 5.5V
MAX4210/MAX4211
4V TO 28V + -
+
VSENSE RSENSE
LOAD
+ -
RS+
RS-
+ -
+ -
25:1
IOUT POUT 0 TO 1V 1.21V REFERENCE REF IN
IOUT POUT
+ 1.21V REFERENCE INHIBIT REF
INHIBIT
CIN1+
CIN1+
COUT1 CIN1LE CIN2+ COUT2 CIN2MAX4211A MAX4211B MAX4211C GND
COUT1 CIN1LE CIN2+ COUT2 CIN2MAX4211D MAX4211E MAX4211F GND
Detailed Description
The MAX4210/MAX4211 families of current- and powermonitoring ICs integrate a precision current-sense amplifier and an analog multiplier for a variety of current and power measurements. The MAX4211 integrates an additional uncommitted 1.21V reference and two comparators with open-drain outputs. These features enable the design of detector circuits for overpower, overcurrent, overvoltage, or any combination of fault conditions. The MAX4210/MAX4211 offer various gains, packages, and configurations allowing for greater design flexibility and lower overall cost. These devices monitor the load current with their highside current-sense amplifiers and provide an analog
output voltage proportional to that current at IOUT (MAX4211). This voltage is fed to the analog multiplier for multiplying the load current with a source voltage to obtain a voltage proportional to load power at POUT.
Current-Sense Amplifier
The integrated current-sense amplifier is a differential amplifier that amplifies the voltage across RS+ and RS-. A sense resistor, RSENSE, is connected across RS+ and RS-. A voltage drop across RSENSE is developed when a load current is passed through it. This voltage is amplified and is proportional to the load current. This voltage is also fed to the analog multiplier for powersensing applications (see the Analog Multiplier section). The current-sense amplifiers feature three gain options: 16.67V/V, 25.0V/V, and 40.96V/V (see Table 1).
19
______________________________________________________________________________________
High-Side Power and Current Monitors MAX4210/MAX4211
The common-mode voltage range is +4V to +28V and independent of the supply voltage. With this feature, the device can monitor the output current of a high-voltage source while running at a lower system voltage typically between 2.7V and 5.5V. The MAX4211 has a current-sense amplifier output. The voltage at IOUT is proportional to the voltage across VSENSE: VIOUT = AVIOUT x VSENSE where VSENSE is the voltage across RS+ and RS-, and AVIOUT is the amplifier gain of the device given in Table 1. where VSENSE is the voltage across RS+ and RS- and A VPOUT is the amplifier gain of the device given in Table 2.
Internal Comparators (MAX4211)
The MAX4211 features two uncommitted open-drain output comparators. These comparators can be configured to trip when load current or power reaches a set limit. They can also be configured as a window comparator with wire-OR output. Comparator 1 (COUT1) features latch-enable (LE) and inhibit (INHIBIT) inputs. When LE is low, the comparator is transparent (it functions as a regular unlatched comparator). When LE is high, the comparator output (COUT1) is latched. When high, the INHIBIT input suspends the comparator operation and latches the output to the current state. The operation of INHIBIT is similar to LE, except it has a different input threshold and wider hysteresis. The INHIBIT logic-high threshold is 1.21V and logic-low threshold is 0.6V with 0.6V hysteresis. INHIBIT is useful in preventing the comparator from giving false output during fast RS+ transients. INHIBIT is generally triggered by an RC network connected to RS+ (see the Applications Information). Both comparators have a built-in 300s blanking period at power-up to prevent false outputs. The comparator outputs are open drain and they can be pulled up to VCC, RS+, or any voltage less than +28V. LE and INHIBIT are internally pulled down by a 1A source.
Analog Multiplier
The MAX4210/MAX4211 integrate an analog multiplier that enables real-time monitoring of power delivered to a load. The voltage proportional to the load current is fed to one input of the multiplier and a voltage proportional to the source voltage is fed to the other. The analog multiplier multiplies these two voltages to obtain an output voltage proportional to the load power. The analog multiplier is designed only to operate in the positive quadrant, that is, the inputs and outputs are always positive voltages. For the MAX4210D/E/F and MAX4211D/E/F, the analog multiplier full-scale input at IN is approximately 1V. This independent multiplier input allows greater design flexibility when using an external voltage-divider. For the MAX4210A/B/C and MAX4211A/B/C, an integrated voltage-divider divides the source voltage at the RS+ pin by a nominal value of 25 and passes this voltage to the multiplier. Thus, the full-scale input voltage at RS+ is 25V. The integrated, trimmed resistor-dividers reduce external component count and cost. The voltage output at POUT is proportional to the output power: For the MAX4210A/B/C and MAX4211A/B/C: VPOUT = AVPOUT x VSENSE x VRS+ For the MAX4210D/E/F and MAX4211D/E/F: VPOUT = AVPOUT x VSENSE x VIN
Table 2. MAX4210/MAX4211 Power-Sense Amplifier Gain and Full-Scale Sense Voltage
PART MAX4210A MAX4210B MAX4210C MAX4210D MAX4210E MAX4210F MAX4211A MAX4211B MAX4211C MAX4211D MAX4211E MAX4211F POWER-SENSE AMPLIFIER GAIN (AVPOUT, 1/V) 0.667 1.000 1.640 16.670 25.000 40.960 0.667 1.000 1.640 16.670 25.000 40.960 FULL-SCALE SENSE VOLTAGE (mV) 150 150 100 150 150 100 150 150 100 150 150 100
Table 1. MAX4211 Current-Sense Amplifier Gain and Full-Scale Sense Voltage
PART MAX4211A/D MAX4211B/E MAX4211C/F CURRENT-SENSE AMPLIFIER GAIN (AVIOUT, V/V) 16.67 25.00 40.96 FULL-SCALE SENSE VOLTAGE (mV) 150 150 100
20
______________________________________________________________________________________
High-Side Power and Current Monitors
Internal Reference (MAX4211)
The MAX4211 features a 1.21V bandgap reference output, stable over supply voltage and temperature. Typically, the reference output is connected to one of the comparators' inputs. This is the comparison reference voltage. If a lower reference voltage is needed, use an external voltage-divider. The reference can source or sink a load current up to 100A.
MAX4210/MAX4211
Typical Operating Circuit
+
4V TO 28V
VSENSE RSENSE
LOAD
+ RS+ VCC 2.7V TO 5.5V
RS-
+ -
C1 RP
25:1
IOUT POUT
R7 VPULLUP INHIBIT R3 COUT1
1.21V REFERENCE
REF
CIN1+ R1 CIN1-
VPULLUP R6
LE CIN2+ COUT2 CIN2MAX4211A MAX4211B MAX4211C R2 R4
GND
R5
______________________________________________________________________________________
21
High-Side Power and Current Monitors MAX4210/MAX4211
Applications Information
Recommended Component Values
Ideally, the maximum load current develops the fullscale sense voltage across the current-sense resistor. Choose the gain version needed to yield the maximum current-sense amplifier output voltage without saturating it. The typical high-side saturation voltage is about VCC - 0.25V. The current-sense amplifier output voltage is given by: VIOUT = VSENSE x AVIOUT where VIOUT is the voltage fed to the analog multiplier or at IOUT. VSENSE is the sense voltage. AVIOUT is the current-sense amplifier gain of the device specified in Table 1. Calculate the maximum value for RSENSE so the differential voltage across RS+ and RS- does not exceed the full-scale sense voltage:
RSENSE = VSENSE(FULL-SCALE) ILOAD(FULL-SCALE)
when the current is inside the current window and low when the current is outside the window. Note that COUT1 and COUT2 are wire-ORed together.
Overpower Circuit Breaker
Figure 2 shows a circuit breaker that shuts off current to the load when an overpower fault is detected (the same circuit can be used to detect overcurrent conditions by connecting the R1-R2 resistor-divider to IOUT, instead of POUT). This circuit is useful for protecting the battery from short-circuit or overpower conditions. When a power fault is detected, the P-MOSFET, M1, is turned off and stays off until the manual reset button is pressed. Also, cycling the input power causes the LE pin to go low, which unlatches the comparator output OUT1 and resets the circuit breaker. During power-up or when the characteristics of the load change, there can be an inrush current into the load. The temporary inrush current results in a higher voltage at POUT. This can bring the voltage at CIN+ above the reference voltage at CIN-, and, as a result, COUT1 goes high triggering the circuit-breaker function. This unwanted behavior can be disabled by bringing comparator 1's INHIBIT input high. An RC network connected to INHIBIT (R4 and C1) can be incorporated to suspend comparator 1's operation for a brief period. In this way, short surges in load power can be made invisible to the circuit-breaker function, while longer term overpower load demands (or a load short circuit) still "trip the breaker." The logic-high threshold for INHIBIT is typically 1.2V, and the logic-low threshold is 0.6V. During power-up, INHIBIT quickly exceeds 1.2V through C1 and inhibits COUT1 from changing state. The comparator inputs are "inhibited" until the INHIBIT voltage is discharged to 0.6V. R3 is a current-limiting resistor, typically 10k, which protects the INHIBIT input. Since INHIBIT is a high-impedance input, R3 has no effect on the R4-C4 charge/discharge time. The time during which the comparator is suspended is approximated by: V tINHIBIT = R4 x C1 In 0.6V where V is the voltage change at the load. For improved transient immunity, tINHIBIT can be increased as required, with the understanding that the breaker function will be suspended for this period. If any comparator is not used, its input must be biased to a known state. For example, connect CIN+ to VCC and CIN- to GND.
Choose the highest value resistance possible to maximize VSENSE and thus minimize total output error. In applications monitoring high current, ensure that RSENSE is able to dissipate its own I2R power dissipation. If the resistor's power dissipation is exceeded, its value can drift or it can fail altogether, causing a differential voltage across the terminals in excess of the absolute maximum ratings. Use resistors specified for current-sensing applications.
Window Comparator
In some applications where undercurrent or underpower (open-circuit fault) and overcurrent or overpower (short-circuit fault) needs to be monitored, a window comparator is desirable. Figure 1 shows a simple circuit suitable for window detection. Let POVER be the minimum load power required to cause a low state at COUT2, and let PUNDER be the maximum load current required to cause a high state at COUT1:
PUNDER (WATTS) = POVER (WATTS) = R1 + R2 VREF AVPOUT x RSENSE R2 R4 + R5 VREF AVPOUT x RSENSE R5
where AVPOUT is the power-sense amplifier gain given in Table 2, and VREF is the internal reference voltage (1.2V, typ). The resulting comparator output is high
22
______________________________________________________________________________________
High-Side Power and Current Monitors MAX4210/MAX4211
+
4V TO 28V VSENSE RSENSE LOAD RS+ VCC 2.7V TO 5.5V RS-
-
+ + -
25:1
IOUT POUT
1.21V REFERENCE VPULLUP INHIBIT
REF R1 CIN1+
COUT1 CIN1LE CIN2+ OVER/ UNDERPOWER COUT2 CIN2MAX4211A MAX4211B MAX4211C R4 R2
GND
R5
Figure 1. Window Comparator for Detecting Underpower and Overpower Faults (Also Detects Undercurrent and Overcurrent Faults by R1 and R4 to IOUT Instead of POUT)
Variable-Gain Amplifier
Figure 3 shows single-ended input, variable-gain amplifiers (VGA). This VGA features more than 200kHz bandwidth and is useful in automatic gain-control circuits commonly found in baseband processors. The gain is controlled by applying 0 to 1V to IN (V GC ) of the MAX4210D/E/F; 0V corresponds to minimum gain and 1V corresponds to maximum gain.
power accurately, choose the MAX4210D/E/F and MAX4211D/E/F with an external resistor-divider connected directly to the load as shown in Figure 4. This configuration improves the load-power measurement accuracy by excluding the additional power dissipated by RSENSE.
Power-Supply Bypassing
Bypass VCC to GND with a 0.1F ceramic capacitor to isolate the IC from supply-voltage transients. To prevent high-frequency coupling, bypass RS+ or RS- with a 0.1F capacitor. On the TDFN and thin QFN packages, there is an exposed paddle that does not carry any current, but should also be connected to the ground plane for rated power dissipation.
23
Measure Load Power
The MAX4210A/B/C and MAX4211A/B/C have internal voltage-divider resistors connected to RS+ and the analog multiplier input. This configuration measures source power accurately and provides protection to the power source such as a battery. To measure the load
______________________________________________________________________________________
High-Side Power and Current Monitors MAX4210/MAX4211
+
4V TO 28V VSENSE RSENSE R5 RS+ VCC 2.7V TO 5.5V RSLOAD
-
M1
+ + -
C1 R3
25:1
IOUT POUT
R4
1.21V REFERENCE INHIBIT
REF R1 CIN1+
COUT1 CIN1LE CIN2+ COUT2 MANUAL RESET CIN2MAX4211A MAX4211B MAX4211C RESET (FROM C) R2
GND
Figure 2. Overpower Circuit Breaker (For a Detailed Example, Refer to the MAX4211E EV Kit)
24
______________________________________________________________________________________
High-Side Power and Current Monitors MAX4210/MAX4211
VCC MAX4210D/E/F RS+ R2 RSIN POUT OUTPUT VOUTPUT = VINPUT (R2/R1) AVPOUT VIN
INPUT
VIN GAIN CONTROL (0 TO 1V)
R1
Figure 3. Single-Ended-Input, Variable-Gain Amplifier
+
4V TO 28V
VSENSE RSENSE
-
+ RS+ VCC
RS-
LOAD
2.7V TO 5.5V
+ MAX4210D/E/F MAX4211D/E/F POUT GND IN
Figure 4. Load-Power Measurement with External Voltage-Divider
______________________________________________________________________________________
25
High-Side Power and Current Monitors MAX4210/MAX4211
Selector Guide
NO. OF COMPARATORS FULL-SCALE VSENSE VOLTAGE (mV) 150 150 150 150 100 100 150 150 150 150 100 100 150 150 150 150 100 100 150 150 150 150 100 100 VOLTAGEMULTIPLIER INPUT (INTERNAL RESISTOR-DIVIDER/ EXTERNAL INPUT) INT INT INT INT INT INT EXT EXT EXT EXT EXT EXT INT INT INT INT INT INT EXT EXT EXT EXT EXT EXT POWER GAIN (1/V) CURRENT/ POWER MEASUREMENT OUTPUT CURRENT GAIN (V/V)
PART
PINPACKAGE
MAX4210AETT MAX4210AEUA MAX4210BETT MAX4210BEUA MAX4210CETT MAX4210CEUA MAX4210DETT MAX4210DEUA MAX4210EETT MAX4210EEUA MAX4210FETT MAX4210FEUA MAX4211AETE MAX4211AEUE MAX4211BETE MAX4211BEUE MAX4211CETE MAX4211CEUE MAX4211DETE MAX4211DEUE MAX4211EETE MAX4211EEUE MAX4211FETE MAX4211FEUE
6 TDFN 8 MAX 6 TDFN 8 MAX 6 TDFN 8 MAX 6 TDFN 8 MAX 6 TDFN 8 MAX 6 TDFN 8 MAX 16 Thin QFN 16 TSSOP 16 Thin QFN 16 TSSOP 16 Thin QFN 16 TSSOP 16 Thin QFN 16 TSSOP 16 Thin QFN 16 TSSOP 16 Thin QFN 16 TSSOP
-- -- -- -- -- -- -- -- -- -- -- -- 16.67 16.67 25.00 25.00 40.96 40.96 16.67 16.67 25.00 25.00 40.96 40.96
0.667 0.667 1.000 1.000 1.640 1.640 16.670 16.670 25.000 25.000 40.960 40.960 0.667 0.667 1.000 1.000 1.640 1.640 16.670 16.670 25.000 25.000 40.960 40.960
P P P P P P P P P P P P C/P C/P C/P C/P C/P C/P C/P C/P C/P C/P C/P C/P
None None None None None None None None None None None None 2 2 2 2 2 2 2 2 2 2 2 2
C = Current Measurement Output Available (IOUT). P = Power Measurement Output Available (POUT). Y = Yes. N = No. INT = Internal Resistor-Divider. EXT = External Input Pin.
26
______________________________________________________________________________________
INTERNAL REFERENCE N N N N N N N N N N N N Y Y Y Y Y Y Y Y Y Y Y Y
High-Side Power and Current Monitors
Ordering Information (continued)
PART MAX4210BETT MAX4210BEUA MAX4210CETT MAX4210CEUA MAX4210DETT MAX4210DEUA MAX4210EETT MAX4210EEUA MAX4210FETT MAX4210FEUA MAX4211AETE MAX4211AEUE MAX4211BETE MAX4211BEUE MAX4211CETE MAX4211CEUE MAX4211DETE MAX4211DEUE MAX4211EETE MAX4211EEUE MAX4211FETE MAX4211FEUE TEMP RANGE -40C to +85C PIN-PACKAGE 6 TDFN-EP* (3mm x 3mm) TOP MARK AHG -- AHH -- AHI -- AHJ -- AHK -- -- -- -- -- -- -- -- -- -- -- -- --
Chip Information
MAX4210 TRANSISTOR COUNT: 515 MAX4211 TRANSISTOR COUNT: 1032 PROCESS: BiCMOS
MAX4210/MAX4211
-40C to +85C 8 MAX -40C to +85C 6 TDFN-EP* (3mm x 3mm)
-40C to +85C 8 MAX -40C to +85C 6 TDFN-EP* (3mm x 3mm)
-40C to +85C 8 MAX -40C to +85C 6 TDFN-EP* (3mm x 3mm)
-40C to +85C 8 MAX -40C to +85C 6 TDFN-EP* (3mm x 3mm)
-40C to +85C 8 MAX -40C to +85C 16 Thin QFN-EP* (4mm x 4mm)
-40C to +85C 16 TSSOP -40C to +85C 16 Thin QFN-EP* (4mm x 4mm)
-40C to +85C 16 TSSOP -40C to +85C 16 Thin QFN-EP* (4mm x 4mm)
-40C to +85C 16 TSSOP -40C to +85C 16 Thin QFN-EP* (4mm x 4mm)
-40C to +85C 16 TSSOP -40C to +85C 16 Thin QFN-EP* (4mm x 4mm)
-40C to +85C 16 TSSOP -40C to +85C 16 Thin QFN-EP* (4mm x 4mm)
-40C to +85C 16 TSSOP
*EP = Exposed paddle.
______________________________________________________________________________________
27
High-Side Power and Current Monitors MAX4210/MAX4211
Pin Configurations
TOP VIEW
GND (IN) N.C. VCC
1 2 3
6
POUT RSRS+
GND (IN) N.C. N.C. VCC
1 2 3 4
8
POUT RSN.C. RS+
MAX4210
5 4
MAX4210
7 6 5
MAX 3mm x 3mm TDFN
16
15
14
13
POUT
IOUT
RS+
RS-
RS- 1 12 REF 11 CIN1RS+ 2 VCC 3
16 IOUT 15 POUT 14 REF
VCC (IN) N.C. LE COUT1
1 2
(IN) N.C. 4 LE 5 COUT1 6
MAX4211
3 4 5 INHIBIT 6 COUT2 7 GND 8 CIN2+ 10 CIN1+ 9 CIN2-
MAX4211
13 CIN112 CIN1+ 11 CIN210 CIN2+ 9 GND
INHIBIT 7 COUT2 8
TSSOP
4mm x 4mm THIN QFN
( ) ARE FOR MAX421_D/E/F.
28
______________________________________________________________________________________
High-Side Power and Current Monitors
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)
6, 8, &10L, DFN THIN.EPS
MAX4210/MAX4211
D
N
PIN 1 INDEX AREA
E
DETAIL A
E2
C L
C L
L A e e
L
PACKAGE OUTLINE, 6, 8, 10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 mm
NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY
21-0137
F
1
2
COMMON DIMENSIONS SYMBOL A D E A1 L k A2 MIN. 0.70 2.90 2.90 0.00 MAX. 0.80 3.10 3.10 0.05
0.40 0.20 0.25 MIN. 0.20 REF.
PACKAGE VARIATIONS PKG. CODE T633-1 T833-1 T1033-1 T1433-1 T1433-2 N 6 8 10 14 14 D2 1.500.10 1.500.10 1.500.10 1.700.10 1.700.10 E2 2.300.10 2.300.10 2.300.10 2.300.10 2.300.10 e 0.95 BSC 0.65 BSC 0.50 BSC 0.40 BSC 0.40 BSC JEDEC SPEC MO229 / WEEA MO229 / WEEC MO229 / WEED-3 ------b 0.400.05 0.300.05 0.250.05 0.200.03 0.200.03 [(N/2)-1] x e 1.90 REF 1.95 REF 2.00 REF 2.40 REF 2.40 REF
PACKAGE OUTLINE, 6, 8, 10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 mm
21-0137
F
2
2
NOTE: THE TDFN EXPOSED PADDLE SIZE-VARIATION PACKAGE CODE: T633-1 ______________________________________________________________________________________ 29
High-Side Power and Current Monitors MAX4210/MAX4211
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)
24L QFN THIN.EPS
PACKAGE OUTLINE 12, 16, 20, 24L THIN QFN, 4x4x0.8mm
21-0139
C
1 2
PACKAGE OUTLINE 12, 16, 20, 24L THIN QFN, 4x4x0.8mm
21-0139
C
2 2
NOTE: THE THIN QFN EXPOSED PADDLE SIZE-VARIATION PACKAGE CODE: T1644-4 30 ______________________________________________________________________________________
High-Side Power and Current Monitors
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)
8LUMAXD.EPS
MAX4210/MAX4211
4X S
8
8
INCHES DIM A A1 A2 b MIN 0.002 0.030 MAX 0.043 0.006 0.037
MILLIMETERS MAX MIN 0.05 0.75 1.10 0.15 0.95
y 0.500.1
E
H
0.60.1
c D e E H L
1
1
0.60.1
S
D
BOTTOM VIEW
0.010 0.014 0.005 0.007 0.116 0.120 0.0256 BSC 0.116 0.120 0.188 0.198 0.016 0.026 6 0 0.0207 BSC
0.25 0.36 0.13 0.18 2.95 3.05 0.65 BSC 2.95 3.05 4.78 5.03 0.41 0.66 0 6 0.5250 BSC
TOP VIEW
A2
A1
A
c e b L
SIDE VIEW
FRONT VIEW
PROPRIETARY INFORMATION TITLE:
PACKAGE OUTLINE, 8L uMAX/uSOP
APPROVAL DOCUMENT CONTROL NO. REV.
21-0036
1 1
J
______________________________________________________________________________________
31
High-Side Power and Current Monitors MAX4210/MAX4211
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
32 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
TSSOP4.40mm.EPS

▲Up To Search▲

Price & Availability of MAX4210

	To Download MAX4210 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .