View MAX4852H_277012.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-3375; Rev 0; 7/04
Dual SPDT Analog Switches with Over-Rail Signal Handling
General Description
The MAX4850/MAX4850H/MAX4852/MAX4852H family of dual SPDT (single-pole/double-throw) switches operate from a single +2V to +5.5V supply and can handle signals greater than the supply rail. These switches feature low 3.5 or 3.5/7 on-resistance with low oncapacitance, making them ideal for switching audio and data signals. The MAX4850/MAX4850H are configured with two SPDT switches and feature two comparators for headphone detection or mute/send key functions. The MAX4852 has two SPDT switches with no comparators for low 1A supply current. For over-rail applications, these devices offer either the pass-through or high-impedance option. For the MAX4850/MAX4852, the signal (up to 5.5V) passes through the switch without distortion even when the positive supply rail is exceeded. For the MAX4850H/ MAX4852H, the switch input becomes high impedance when the input signal exceeds the supply rail. The MAX4850/MAX4850H/MAX4852/MAX4852H are available in the space-saving (3mm x 3mm), 16-pin TQFN package and operate over the extended temperature range of -40C to +85C.
Features
o USB 2.0 Full Speed (12MB) and USB 1.1 Signal Switching Compliant o Switch Signals Greater than VCC o 0.1ns Differential Skew o 3.5/7 On-Resistance o 135MHz -3dB Bandwidth o +2V to +5.5V Supply Range o 1.8V Logic Compatible o Low Supply Current 1A (MAX4852) 5A (MAX4850) 10A (MAX4850H/MAX4852H) o Available in a Space-Saving (3mm x 3mm), 16-Pin TQFN Package
MAX4850/MAX4850H/MAX4852/MAX4852H
Ordering Information
PART MAX4850ETE MAX4850HETE MAX4852ETE TEMP RANGE -40C to +85C -40C to +85C -40C to +85C PIN-PACKAGE 16 TQFN-EP* 16 TQFN-EP* 16 TQFN-EP* 16 TQFN-EP* TOP MARK ABU ABV ABZ ACA
Applications
USB Switching Audio-Signal Routing Cellular Phones Notebook Computers PDAs and Other Handheld Devices
MAX4852HETE -40C to +85C *EP = Exposed paddle.
Pin Configurations and Selector Guide appear at end of data sheet.
Block Diagrams/Truth Table
MAX4850 MAX4850H
NC1 3.5 NO1 COM1 IN1 IN2 NC2 3.5 NO2 VCC 3 COM2 COM2 NO2 7 3.5 IN2 NO1 7
NC1
MAX4852 MAX4852H
3.5 COM1 IN1
MAX4850_ MAX4852_ IN_ 0 1 NO_ OFF ON NC_ ON OFF
SWITCHES SHOWN FOR NC2 LOGIC 0 INPUT
COUT1 CIN1 VCC 3 COUT2 CIN2
________________________________________________________________ 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.
Dual SPDT Analog Switches with Over-Rail Signal Handling MAX4850/MAX4850H/MAX4852/MAX4852H
ABSOLUTE MAXIMUM RATINGS
VCC, IN_, CIN_, COM_, NO_, NC_ to GND (Note 1).........................................-0.3V to +6.0V COUT_........................................................-0.3V to (VCC + 0.3V) COUT_ Continuous Current..............................................20mA Closed Switch Continuous Current COM_, NO_, NC_ 3.5 Switch ................................................................100mA 7 Switch .....................................................................50mA Peak Current COM_, NO_, NC_ (pulsed at 1ms, 50% duty cycle) 3.5 Switch ................................................................200mA 7 Switch ...................................................................100mA Note 1: Peak Current COM_, NO_, NC_ (pulsed at 1ms, 10% duty cycle) 3.5 Switch ................................................................240mA 7 Switch ...................................................................120mA Continuous Power Dissipation (TA = +70C) 16-Pin TQFN (derate 20.8mW/C above +70C) ...........1667mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
Signals on IN, NO, NC, or COM below GND are clamped by internal diodes. Limit forward-diode current to maximum current rating.
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 = +2.7V to +5.5V, TA = -40C to +85C, unless otherwise noted. Typical values are at VCC = +3.0V, TA = +25C, unless otherwise noted.) (Note 2)
PARAMETER Supply Voltage SYMBOL VCC MAX4850 Supply Current ICC VCC = 5.5V, VIN_ = 0V or VCC MAX4850H/ MAX4852H MAX4852 ANALOG SWITCH (3.5 Switch) Analog Signal Range VNO_, VNC_, VCOM_ RON VCC = 3V, ICOM_ = 10mA, VNC_ or VNO_ = 0 to 5.5V (MAX485_) or VCC (MAX485_H) VCC = 3V, ICOM = 10mA, VNC_ or VNO_ = 1.5V VCC = 3V, ICOM_ = 10mA, VNC_ or VNO_ = 1V, 2V, 3V VCC = 5.5V, VNC_ or VNO_ = 1V or 4.5V, VCOM_ = 4.5V or 1V VCC = 5.5V; VNC_ or VNO_ = 1V, 4.5V, or floating; VCOM_ = 1V, 4.5V, or floating TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C -2 -10 -2 -12.5 100 20 1.2 0.1 0 3.5 5.5 4.5 5 0.2 0.25 1.8 2 +2 +10 +2 +12.5 nA nA V CONDITIONS MIN 2.0 5 10 TYP MAX 5.5 10 20 1 A UNITS V
On-Resistance (Note 3)
On-Resistance Match Between Channels (Notes 3, 4) On-Resistance Flatness (Note 5)
RON
RFLAT
NO_/NC_ Off-Leakage Current
IOFF
COM_ On-Leakage Current
ION BW COFF
-3dB Bandwidth NO_/NC_ Off-Capacitance
Signal = 0dBm, RL = 50, CL = 5pF (Figure 5) f = 1MHz (Figure 6)
MHz pF
2
_______________________________________________________________________________________
Dual SPDT Analog Switches with Over-Rail Signal Handling
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.7V to +5.5V, TA = -40C to +85C, unless otherwise noted. Typical values are at VCC = +3.0V, TA = +25C, unless otherwise noted.) (Note 2)
PARAMETER COM On-Capacitance ANALOG SWITCH (7 Switch) Analog Signal Range VNO_, VNC_, VCOM_ RON VCC = 3V, ICOM_ = 10mA, VNC_ or VNO_ = 0 to 5.5V (MAX4852) or VCC (MAX4852H) VCC = 3V, ICOM = 10mA, VNC_ or VNO_ = 1.5V VCC = 3V, ICOM_ = 10mA, VNC_ or VNO_ = 1V, 2V, 3V VCC = 5.5V, VNC_ or VNO_ = 1V or 4.5V, VCOM_ = 4.5V or 1V VCC = 5.5V; VNC_ or VNO_ = 1V, 4.5V, or floating; VCOM_ = 1V, 4.5V, or floating TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C -2 -10 -2 -12.5 135 12 50 2.5 0.2 0 7 5.5 9 10 0.4 0.5 3.75 4.0 +2 +10 +2 +12.5 nA nA V SYMBOL CON CONDITIONS f = 1MHz (Figure 6) MIN TYP 60 MAX UNITS pF
MAX4850/MAX4850H/MAX4852/MAX4852H
On-Resistance
On-Resistance Match Between Channels (Notes 3, 4) On-Resistance Flatness (Note 5)
RON
RFLAT
NO_/NC_ Off-Leakage Current
IOFF
COM_ On-Leakage Current
ION BW COFF CON
-3dB Bandwidth NO_/NC_ Off-Capacitance COM On-Capacitance DYNAMIC CHARACTERISTICS Signal Over-Rail to High-Z Switching Time High-Z to Low-Z Switching Time Skew (Note 3) Propagation Delay (Note 3) Turn-On Time
Signal = 0dBm, RL = 50, CL = 5pF (Figure 5) f = 1MHz (Figure 6) f = 1MHz (Figure 6)
MHz pF pF
tHIZ tHIZB tSKEW tPD tON
MAX4850H/MAX4852H, VNO_ or VNC_ = VCC to (VCC + 0.5V), VCC < 5V (Figure 1) MAX4850H/MAX4852H, VNO_ or VNC_ = (VCC + 0.5V) to VCC, VCC < 5V (Figure 1) RS = 39, CL = 50pF (Figure 2) RS = 39, CL = 50pF (Figure 2) VCC = 3V, VNO_ or VNC_ = 1.5V, RL = 300, CL = 50pF (Figure 1) VCC = 3V, VNO_ or VNC_ = 1.5V, RL = 300, CL = 50pF (Figure 1) TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C
0.5 0.5 0.1 0.9 40
1 1 1 2 60 100
s s ns ns ns
30
40 60 ns
Turn-Off Time
tOFF
_______________________________________________________________________________________
3
Dual SPDT Analog Switches with Over-Rail Signal Handling MAX4850/MAX4850H/MAX4852/MAX4852H
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.7V to +5.5V, TA = -40C to +85C, unless otherwise noted. Typical values are at VCC = +3.0V, TA = +25C, unless otherwise noted.) (Note 2)
PARAMETER Break-Before-Make Time Delay (Note 3) Charge Injection Off-Isolation (Note 6) Crosstalk Total Harmonic Distortion DIGITAL I/O (IN_) Input-Logic High Voltage Input-Logic Low Voltage Input Leakage Current COMPARATOR Comparator Range Comparator Threshold Comparator Hysteresis Comparator Output High Voltage Comparator Output Low Voltage Comparator Switching Time VTH VCC = 2V to 5.5V, falling input VCC = 2V to 5.5V ISOURCE = 1mA ISINK = 1mA Rising input (Figure 7) Falling input (Figure 7) 2.5 0.5 VCC 0.4V 0.4 0 0.3 x VCC 0.33 x VCC 50 5.5 0.36 x VCC V V mV V V s VIH VIL IIN VCC = 2V to 3.6V VCC = 3.6V to 5.5V VCC = 2V to 3.6V VCC = 3.6V to 5.5V VIN_ = 0 or 5.5V -0.5 1.4 1.8 0.5 0.8 +0.5 V V A SYMBOL tD Q VISO VCT THD CONDITIONS VCC = 3V, VNO_ or VNC_ = 1.5V, RL = 300, CL = 50pF (Figure 3) TA = +25C TA = -40C to +85C 2 8 -80 -95 0.04 MIN TYP 15 ns pC dB dB % MAX UNITS
VCOM_ = 1.5V, RS = 0, CL = 1nF (Figure 4) f = 100kHz, VCOM_= 1VRMS, RL = 50, CL = 5pF (Figure 5) f = 1MHz, VCOM_ = 1VRMS, RL = 50, CL = 5pF (Figure 5) f = 20Hz to 20kHz, VCOM_ = 1V + 2VP-P, RL = 600
Note 2: Note 3: Note 4: Note 5: Note 6:
Specifications are 100% tested at TA = +85C only, and guaranteed by design and characterization over the specified temperature range. Guaranteed by design and characterization; not production tested. RON = RON(MAX) - RON(MIN). Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal ranges. Off-isolation = 20log10 (VCOM_ / VNO_), VCOM_ = output, VNO_ = input to off switch.
4
_______________________________________________________________________________________
Dual SPDT Analog Switches with Over-Rail Signal Handling MAX4850/MAX4850H/MAX4852/MAX4852H
Typical Operating Characteristics
(VCC = 3.0V, TA = +25C, unless otherwise noted.)
MAX4850/MAX4852 ON-RESISTANCE vs. COM VOLTAGE
MAX4850 toc01
MAX4850/MAX4852 ON-RESISTANCE vs. COM VOLTAGE
MAX4850 toc02
MAX4850/MAX4852 ON-RESISTANCE vs. COM VOLTAGE
VCC = 5.0V 3.5 SWITCH TA = +85C 2.5 TA = +25C 2.0 1.5 1.0 0.5 TA = -40C
MAX4850 toc03
10 9 8 ON-RESISTANCE () 7 6 5 4 3 2 1 0 0 2 4 6 COM VOLTAGE (V) VCC = 2.0V VCC = 2.3V VCC = 2.5V VCC = 3.0V VCC = 5.0V VCC = 1.8V 3.5 SWITCH
4.5 4.0 ON-RESISTANCE () 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 2 4 TA = -40C
VCC = 3.0V 3.5 SWITCH TA = +85C TA = +25C
3.5 3.0 ON-RESISTANCE ()
6
0
2
4
6
COM VOLTAGE (V)
COM VOLTAGE (V)
MAX4850H/MAX4852H ON-RESISTANCE vs. COM VOLTAGE
MAX4850 toc04
MAX4850H/MAX4852H ON-RESISTANCE vs. COM VOLTAGE
MAX4850 toc05
MAX4850H/MAX4852H ON-RESISTANCE vs. COM VOLTAGE
VCC = 5.0V 3.5 SWITCH TA = +85C TA = +25C
MAX4850 toc06
10 9 8 ON-RESISTANCE () 7 6 5 4 3 2 1 0 0 2 4 VCC = 1.8V VCC = 2.0V VCC = 2.3V VCC = 2.5V VCC = 3.0V
3.5 SWITCH
5.0 4.5 ON-RESISTANCE () 4.0 3.5 3.0 2.5 2.0 1.5 1.0 TA = -40C TA = +25C TA = +85C VCC = 3.0V 3.5 SWITCH
3.5 3.0 ON-RESISTANCE () 2.5 2.0 1.5 1.0 0.5 TA = -40C
VCC = 5.0V
6
0
0.5
1.0
1.5
2.0
2.5
3.0
0
1
2
3
4
5
COM VOLTAGE (V)
COM VOLTAGE (V)
COM VOLTAGE (V)
MAX4852 ON-RESISTANCE vs. COM VOLTAGE
MAX4850 toc07
MAX4852 ON-RESISTANCE vs. COM VOLTAGE
MAX4850 toc08
MAX4852 ON-RESISTANCE vs. COM VOLTAGE
5.0 ON-RESISTANCE () 4.5 4.0 3.5 3.0 2.5 TA = +25C TA = +85C VCC = 5.0V 7 SWITCH
MAX4850 toc09
45 7 SWITCH 40 35 ON-RESISTANCE () 30 25 20 15 10 5 0 0 2 4 6 COM VOLTAGE (V) VCC = 2.0V VCC = 2.3V VCC = 2.5V VCC = 3.0V VCC = 5.0V VCC = 1.8V
8 7 ON-RESISTANCE () 6 5 4 3 2 0 2 4 6 COM VOLTAGE (V) TA = +25C TA = -40C VCC = 3.0V 7 SWITCH TA = +85C
5.5
2.0 1.5 0 1 2 3
TA = -40C 4 5 6
COM VOLTAGE (V)
_______________________________________________________________________________________
5
Dual SPDT Analog Switches with Over-Rail Signal Handling MAX4850/MAX4850H/MAX4852/MAX4852H
Typical Operating Characteristics (continued)
(VCC = 3.0V, TA = +25C, unless otherwise noted.)
MAX4852H ON-RESISTANCE vs. COM VOLTAGE
MAX4850 toc10
MAX4852H ON-RESISTANCE vs. COM VOLTAGE
MAX4850 toc11
MAX4852H ON-RESISTANCE vs. COM VOLTAGE
5.0 ON-RESISTANCE () 4.5 4.0 3.5 3.0 2.5 2.0 1.5 TA = -40C 0 1 2 3 4 5 TA = +25C TA = +85C VCC = 5.0V 7 SWITCH
MAX4850 toc12
45 7 SWITCH 40 35 ON-RESISTANCE () 30 25 20 15 10 5 0 0 2 4 6 COM VOLTAGE (V) VCC = 2.3V VCC = 2.5V VCC = 3.0V VCC = 5.0V VCC = 2.0V VCC = 1.8V
8 7 ON-RESISTANCE () 6 5
VCC = 3.0V 7 SWITCH TA = +85C
5.5
TA = +25C 4 TA = -40C 3 2 0 0.5 1.0 1.5 2.0 2.5 3.0 COM VOLTAGE (V)
COM VOLTAGE (V)
MAX4850 SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4850 toc13
MAX4850H SUPPLY CURRENT vs. SUPPLY VOLTAGE
9 SUPPLY CURRENT (A) 8 7 6 5 TA = +25C 4 3 TA = +85C
MAX4850 toc14
7
10 TA = -40C
6 SUPPLY CURRENT (A) TA = -40C 5
4 TA = +25C TA = +85C
3
2 1.5 2.5 3.5 4.5 5.5 SUPPLY VOLTAGE (V)
2 1.5 2.5 3.5 4.5 5.5 SUPPLY VOLTAGE (V)
MAX4852 SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4850 toc15
MAX4852H SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4850 toc16
TURN-ON/TURN-OFF TIME vs. SUPPLY VOLTAGE
3.5 SWITCH TURN-ON/TURN-OFF TIME (ns) 50 40 tON 30 20 tOFF 10 0
MAX4850 toc17
3.5 3.0 SUPPLY CURRENT (nA) 2.5 2.0 1.5 1.0 0.5 0 1.5 2.5 3.5 4.5 TA = +25C TA = -40C TA = +85C
7.0 6.5 TA = -40C SUPPLY CURRENT (A) 6.0 5.5 5.0 4.5 4.0 3.5 3.0 TA = +85C TA = +25C
60
5.5
1.5
2.5
3.5
4.5
5.5
1.5
2.5
3.5
4.5
5.5
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
6
_______________________________________________________________________________________
Dual SPDT Analog Switches with Over-Rail Signal Handling MAX4850/MAX4850H/MAX4852/MAX4852H
Typical Operating Characteristics (continued)
(VCC = 3.0V, TA = +25C, unless otherwise noted.)
TURN-ON/TURN-OFF TIME vs. TEMPERATURE
MAX4850 toc18
TURN-ON/TURN-OFF TIME vs. SUPPLY VOLTAGE
MAX4850 toc19
TURN-ON/TURN-OFF TIME vs. TEMPERATURE
7 SWITCH TURN-ON/TURN-OFF TIME (ns) 32 tON 30 28 26 tOFF 24 22 20
MAX4850 toc20
34 3.5 SWITCH TURN-ON/TURN-OFF TIME (ns) 32 30 28 26 tOFF 24 22 20 -40 -15 10 35 60 tON
60 50 40 tON 30 20 tOFF 10 0
7 SWITCH
34
TURN-ON/TURN-OFF TIME (ns)
85
1.5
2.5
3.5
4.5
5.5
-40
-15
10
35
60
85
TEMPERATURE (C)
SUPPLY VOLTAGE (V)
TEMPERATURE (C)
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
MAX4850 toc21
CHARGE INJECTION vs. COM VOLTAGE
MAX4850 toc22
CHARGE INJECTION vs. COM VOLTAGE
7 SWITCH VCC = 3V
MAX4850 toc23
1.6
40 3.5 SWITCH VCC = 3V
40
1.4 LOGIC THRESHOLD (V) VIN RISING 1.2
CHARGE INJECTION (pC)
CHARGE INJECTION (pC)
30
30
20
VCC = 5V
20
VCC = 5V
1.0 VIN FALLING 0.8
10
10
0.6 1.5 2.5 3.5 4.5 5.5 SUPPLY VOLTAGE (V)
0 0 1 2 3 4 5 COM VOLTAGE (V)
0 0 1 2 3 4 5 COM VOLTAGE (V)
LEAKAGE CURRENT vs. TEMPERATURE
MAX4850 toc24
LEAKAGE CURRENT vs. TEMPERATURE
7 SWITCH 1.4 LEAKAGE CURRENT (nA) 1.2 1.0 0.8 0.6 0.4 0.2 0 COM OFF-LEAKAGE COM ON-LEAKAGE
MAX4850 toc25
1.4 1.2 LEAKAGE CURRENT (nA) 1.0 0.8 0.6 0.4 0.2 0 -40 -15 10 35
3.5 SWITCH
1.6
COM ON-LEAKAGE
COM OFF-LEAKAGE
60
85
-40
-15
10
35
60
85
TEMPERATURE (C)
TEMPERATURE (C)
_______________________________________________________________________________________
7
Dual SPDT Analog Switches with Over-Rail Signal Handling MAX4850/MAX4850H/MAX4852/MAX4852H
Typical Operating Characteristics (continued)
(VCC = 3.0V, TA = +25C, unless otherwise noted.)
FREQUENCY RESPONSE
MAX4850 toc26
FREQUENCY RESPONSE
ON-RESPONSE 7 SWITCH
MAX4850 toc27 MAX4850 toc29
20 0 -20 -40
ON-RESPONSE
3.5 SWITCH
20 0 -20 -40
FREQUENCY RESPONSE (dB)
OFF-RESPONSE -60 -80 -100 0.1 1 10 FREQUENCY (MHz) 100 1000 CROSSTALK
FREQUENCY RESPONSE (dB)
OFF-RESPONSE -60 -80 -100 0.1 1 10 FREQUENCY (MHz) 100 1000 CROSSTALK
TOTAL HARMONIC DISTORTION vs. FREQUENCY
3.5 SWITCH RL = 600
MAX4850 toc28
TOTAL HARMONIC DISTORTION vs. FREQUENCY
1 7 SWITCH RL = 600
1
THD (%)
0.1
THD (%) 10 100 1k FREQUENCY (Hz) 10k 100k
0.1
0.01
0.01 10 100 1k FREQUENCY (Hz) 10k 100k
8
_______________________________________________________________________________________
Dual SPDT Analog Switches with Over-Rail Signal Handling MAX4850/MAX4850H/MAX4852/MAX4852H
Typical Operating Characteristics (continued)
(VCC = 3.0V, TA = +25C, unless otherwise noted.)
COMPARATOR THRESHOLD vs. TEMPERATURE
MAX4850 toc30
COMPARATOR THRESHOLD vs. TEMPERATURE
VCC = 5.0V COMPARATOR THRESHOLD (V) 1.725 1.700 1.675 1.650 1.625 1.600 VCMPI_ FALLING VCMPI_ RISING
MAX4850 toc31
1.10 VCC = 3.0V COMPARATOR THRESHOLD (V) 1.08 VCMPI_ RISING 1.06
1.750
1.04 VCMPI_ FALLING
1.02
1.00 -40 -15 10 35 60 85 TEMPERATURE (C)
-40
-15
10
35
60
85
TEMPERATURE (C)
MAX4850/MAX4852 SWITCH PASSING SIGNALS ABOVE SUPPLY VOLTAGE
MAX4850 toc32
MAX4850H/MAX4852H SWITCH ENTERING HIGH-IMPEDANCE STATE
MAX4850 toc33
VCC = 3.0V VNC 2V/div 0V VNC 2V/div 0V
VCC = 3.0V
VCOM 0V 200s/div
VCOM 0V
HI-Z STATE
HI-Z STATE
200s/div
_______________________________________________________________________________________
9
Dual SPDT Analog Switches with Over-Rail Signal Handling MAX4850/MAX4850H/MAX4852/MAX4852H
Pin Descriptions
MAX4850/MAX4850H
PIN 1, 8 2 3 4 5 6 7 9 10 11 12 13 14 15 16 EP NAME N.C. CIN1 CIN2 COM1 NO1 GND NC2 IN2 COM2 COUT1 NO2 COUT2 VCC IN1 NC1 -- No Connection. Not internally connected. Inverting Input for Comparator 1 Inverting Input for Comparator 2 Common Terminal for Analog Switch 1 Normally Open Terminal for Analog Switch 1 Ground Normally Closed Terminal for Analog Switch 2 Digital Control Input for Analog Switch 2. A logic LOW on IN2 connects COM2 to NC2 and a logic HIGH connects COM2 to NO2. Common Terminal for Analog Switch 2 Output for Comparator 1 Normally Open Terminal for Analog Switch 2 Output for Comparator 2 Supply Voltage. Bypass to GND with a 0.01F capacitor as close to the pin as possible. Digital Control Input for Analog Switch 1. A logic LOW on IN1 connects COM1 to NC1 and a logic HIGH connects COM1 to NO1. Normally Closed Terminal for Analog Switch 1 Exposed Paddle. Connect to PC board ground plane. FUNCTION
MAX4852/MAX4852H
PIN 1, 2, 3, 8, 11, 13 4 5 6 7 9 10 12 14 15 16 EP NAME N.C. COM1 NO1 GND NC2 IN2 COM2 NO2 VCC IN1 NC1 -- No Connection. Not internally connected. Common Terminal for Analog Switch 1 Normally Open Terminal for Analog Switch 1 Ground Normally Closed Terminal for Analog Switch 2 Digital Control Input for Analog Switch 2. A logic LOW on IN2 connects COM2 to NC2 and a logic HIGH connects COM2 to NO2. Common Terminal for Analog Switch 2 Normally Open Terminal for Analog Switch 2 Supply Voltage. Bypass to GND with a 0.01F capacitor as close to the pin as possible. Digital Control Input for Analog Switch 1. A logic LOW on IN1 connects COM1 to NC1 and a logic HIGH connects COM1 to NO1. Normally Closed Terminal for Analog Switch 1 Exposed Paddle. Connect to PC board ground plane. FUNCTION
10
______________________________________________________________________________________
Dual SPDT Analog Switches with Over-Rail Signal Handling
Detailed Description
The MAX4850/MAX4850H/MAX4852/MAX4852H are low on-resistance, low-voltage, analog switches that operate from a +2V to +5.5V single supply and are fully specified for nominal 3.0V applications. These devices feature over-rail signal capability that allows signals up to 5.5V with supply voltages down to 2.0V. These devices are configured as dual SPDT switches. These switches have low 50pF on-channel capacitance, which allows for 12Mbps switching of the data signals for USB 2.0 full speed/1.1 applications. The MAX485_ _ are designed to switch D+ and D- USB signals with a guaranteed skew of less than 1ns (see Figure 1), as measured from 50% of the input signal to 50% of the output signal. The MAX4850_ features a comparator that can be used for headphone or mute detection. The comparator threshold is internally generated to be approximately 1/3 of VCC. sumption. For a +2V supply voltage, the logic thresholds are 0.5V (low) and 1.4V (high); for a +5V supply voltage, the logic thresholds are 0.8V (low) and 1.8V (high).
MAX4850/MAX4850H/MAX4852/MAX4852H
Analog Signal Levels
The on-resistance of these switches changes very little for analog input signals across the entire supply voltage range (see Typical Operating Characteristics). The switches are bidirectional, so NO_, NC_, and COM_ can be either inputs or outputs.
Comparator
The positive terminal of the comparator is internally set to VCC/3. When the negative terminal (CIN_) is below the threshold (VCC/3), the comparator output (COUT_) goes high. When CIN_ rises above VCC/3, COUT_ goes low. The comparator threshold allows for detection of headphones since headphone audio signals are typically biased to VCC/2.
Applications Information
Digital Control Inputs
The logic inputs (IN_) accept up to +5.5V even if the supply voltages are below this level. For example, with a +3.3V VCC supply, IN_ can be driven low to GND and high to +5.5V, allowing for mixing of logic levels in a system. Driving IN_ rail-to-rail minimizes power con-
Power-Supply Sequencing
Caution: Do not exceed the absolute maximum ratings because stresses beyond the listed ratings may cause permanent damage to the device. Proper power-supply sequencing is recommended for all CMOS devices. Always apply VCC before applying analog signals, especially if the analog signal is not current-limited.
______________________________________________________________________________________
11
Dual SPDT Analog Switches with Over-Rail Signal Handling MAX4850/MAX4850H/MAX4852/MAX4852H
Test Circuits/Timing Diagrams
MAX4850_ MAX4852_
VNO NO_ VCC V CC COM_ VOUT RL IN_ LOGIC INPUT GND CL SWITCH OUTPUT VOUT 0V t ON LOGIC INPUT VCC 50% 0V t OFF 0.9 x V0UT 0.9 x VOUT t R < 20ns t F < 20ns
CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL VOUT = VNO RL + RON
SWITCH INPUT
VCC + 0.5V tHIZB tHIZ NORMAL MODE HIGH-Z MODE NORMAL MODE
(
)
IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 1. Switching Time
tri 50% TxD+ Rs A B CL INPUT A90% 50% INPUT A 10%
90%
tskew_i
10% tfi
tro 50%
90%
TxDRs Rs = 39 CL = 50pF
A-
BCL
OUTPUT B OUTPUT B-
10%
tskew_o 90% 50% 10% tfo
|tro - tri| DELAY DUE TO SWITCH FOR RISING INPUT AND RISING OUTPUT SIGNALS. |tfo - tfi| DELAY DUE TO SWITCH FOR FALLING INPUT AND FALLING OUTPUT SIGNALS.
|tskew_o| CHANGE IN SKEW THROUGH THE SWITCH FOR OUTPUT SIGNALS. |tskew_i| CHANGE IN SKEW THROUGH THE SWITCH FOR INPUT SIGNALS.
Figure 2. Input/Output Skew Timing Diagram 12 ______________________________________________________________________________________
Dual SPDT Analog Switches with Over-Rail Signal Handling MAX4850/MAX4850H/MAX4852/MAX4852H
MAX4850_ MAX4852_
VN_ NC_ NO_ IN_ LOGIC INPUT GND VOUT tBBM CL INCLUDES FIXTURE AND STRAY CAPACITANCE. 0.9 x VOUT COM_ RL V CC V CC VOUT LOGIC INPUT VCC 50% 0V
CL
Figure 3. Break-Before-Make Interval
V CC
MAX4850_ MAX4852_
RGEN NC_ OR NO_ GND IN_
VOUT VOUT VOUT CL IN OFF ON OFF
VCC COM_
V GEN
VIL TO VIH
IN
OFF
ON Q = (V OUT )(C L )
OFF
LOGIC-INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE.
Figure 4. Charge Injection
+5V 10nF NETWORK ANALYZER VCC 0V OR VCC IN_ COM1 VIN 50 50 V OFF-ISOLATION = 20log OUT VIN V ON-LOSS = 20log OUT VIN CROSSTALK = 20log NO1* VOUT MEAS REF VOUT VIN
NC1 50
MAX4850_ MAX4852_
GND
50
50
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF", NO_ OR NC_ TERMINAL ON EACH SWITCH. ON-LOSS IS MEASURED BETWEEN COM_ AND "ON", NO_ OR NC_ TERMINAL ON EACH SWITCH. CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL. SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
*FOR CROSSTALK THIS PIN IS NO2. NC2 AND COM2 ARE OPEN.
Figure 5. On-Loss, Off-Isolation, and Crosstalk ______________________________________________________________________________________ 13
Dual SPDT Analog Switches with Over-Rail Signal Handling MAX4850/MAX4850H/MAX4852/MAX4852H
10nF V CC
VCC COM_
MAX4850_ MAX4852_
IN VIL OR VIH
CAPACITANCE METER f = 1MHz
NC_ OR NO_ GND
Figure 6. Channel Off-/On-Capacitance
MAX4850_
VCC NO_ VCC 3 VCC COUT_ VCIN_ CIN_ GND VTH = VCC/3 COMPARATOR INPUT (VCIN_) VTH - 100mV VCOUT_ COMPARATOR OUTPUT (VCOUT_) 0V VOUT tCOMP
50%
VTH + 100mV
50%
tR < 20ns tF < 20ns
50%
tCOMP
50%
Figure 7. Comparator Switching Time
14
______________________________________________________________________________________
Dual SPDT Analog Switches with Over-Rail Signal Handling
Pin Configurations
NC1 NC1 N.C. VCC VCC IN1 IN1
MAX4850/MAX4850H/MAX4852/MAX4852H
TOP VIEW
16
15
14
13
COUT2
16
15
14
13
N.C. CIN1 CIN2 COM1
1 2 3 4 5 NO1 6 GND 7 NC2 8 N.C.
12 NO2 11 COUT1
N.C. N.C. N.C. COM1
1 2 3 4 5 NO1 6 GND 7 NC2 8 N.C.
12 NO2 11 N.C.
MAX4850 MAX4850H
10 COM2 9 IN2
MAX4852 MAX4852H
10 COM2 9 IN2
THIN QFN
CONNECT EXPOSED PADDLE TO GROUND.
THIN QFN
Selector Guide
PART RON NC_/NO_ COMPARATORS () OVER-RAIL HANDLING Input signal passes through the switch High-impedance switch input Input signal passes through the switch
OUT+ DATA SOURCE
Typical Operating Circuit
OUT+ NC1 OUTNO1
MAX4850_
COM1 IN1 INPUT SELECT
MAX4850
3.5/3.5
2
MAX4850H
3.5/3.5
2
MAX4852
3.5/7
--
NC2
IN2 COM2
MAX4852H
3.5/7
--
High-impedance switch input
AUDIO SOURCE MUTE
OUT-
NO2
VCC 3
VCC
Chip Information
TRANSISTOR COUNT: 735 PROCESS: CMOS
COUT CIN MUTE BUTTON
______________________________________________________________________________________
15
Dual SPDT Analog Switches with Over-Rail Signal Handling MAX4850/MAX4850H/MAX4852/MAX4852H
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.)
D2 b
0.10 M C A B
D D/2
D2/2
E/2
E2/2
C L
E
(NE - 1) X e
E2
L e k (ND - 1) X e
C L
C L
0.10 C 0.08 C A A2 A1 L
C L
L
e
e
PACKAGE OUTLINE 12, 16L, THIN QFN, 3x3x0.8mm
21-0136
E
1 2
EXPOSED PAD VARIATIONS
DOWN BONDS ALLOWED
NOTES: 1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994. 2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES. 3. N IS THE TOTAL NUMBER OF TERMINALS. 4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED WITHIN THE ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE. 5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20 mm AND 0.25 mm FROM TERMINAL TIP. 6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY. 7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION. 8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS. 9. DRAWING CONFORMS TO JEDEC MO220 REVISION C.
PACKAGE OUTLINE 12, 16L, THIN QFN, 3x3x0.8mm
21-0136
E
2 2
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.
16 ____________________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.
12x16L QFN THIN.EPS

▲Up To Search▲

Price & Availability of MAX4852H

	To Download MAX4852H Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .