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19-5338; Rev 0; 8/10
Low-Power, High-Efficiency, Single/Dual, Rail-to-Rail I/O Op Amps
General Description
The MAX9613/MAX9615 are low-power precision op amps with rail-to-rail inputs and rail-to-rail outputs. They feature precision MOS inputs powered from an internal charge pump to eliminate crossover distortion that is common to complementary input-pair type amplifier architectures. These devices are ideal for a large number of signal processing applications such as photodiode transimpedance amplifiers and filtering/amplification of a wide variety of signals in industrial equipment. The devices also feature excellent RF immunity, making them ideal for portable applications. The MAX9613/MAX9615 feature a self-calibration system (on power-up), eliminating the effects of temperature and power-supply variations. The MAX9613/MAX9615 are capable of operating from a 1.7V to 5.5V supply voltage over the 0NC to +70NC temperature range, and from 1.8V to 5.5V over the -40NC to +125NC automotive temperature range. Both singles and duals are available in tiny SC70 packages. The MAX9613 features a high-impedance output while in shutdown.
PART MAX9613AXT+T MAX9615AXA+T
Features
S VCC = 1.7V to 5.5V (0C to +70C) S VCC = 1.8V to 5.5V (-40C to +125C) S Low 100V (max) VOS S Rail-to-Rail Inputs and Outputs S Low 220A Supply Current, 1A in Shutdown S Autotrim Offset Calibration S 2.8MHz Bandwidth S Excellent RF Immunity
MAX9613/MAX9615
Ordering Information
TEMP RANGE -40NC to +125NC -40NC to +125NC PINPACKAGE 6 SC70 8 SC70 TOP MARK +ADK +AAD
+Denotes lead(Pb)-free/RoHS-compliant package. T = Tape and reel.
Applications
Notebooks, Portable Media Players Industrial and Medical Sensors General Purpose Signal Processing
Typical Application Circuit
15nF
+3.3V 2.4kI 22kI 330pF 10kI ADC 3.3nF
MAX9613 MAX11613
CORNER FREQUENCY = 10kHz
SALLEN-KEY FILTER
_______________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
Low-Power, High-Efficiency, Single/Dual, Rail-to-Rail I/O Op Amps MAX9613/MAX9615
ABSOLUTE MAXIMUM RATINGS
IN+, IN-, SHDN, VCC to GND..................................-0.3V to +6V OUT to GND ............................................. -0.3V to (VCC + 0.3V) Short-Circuit (GND) Duration to Either Supply Rail................. 5s Continuous Input Current (any pin)................................. Q20mA Thermal Limits (Note 1) Multilayer PCB Continuous Power Dissipation (TA = +70NC) 6-Pin SC70 (derate 3.1mW/NC above +70NC) .............245mW BJA .......................................................................326.5NC/W BJC ..........................................................................115NC/W 8-Pin SC70 (derate 3.1mW/NC above +70NC) .............245mW BJA .......................................................................... 326NC/W BJC ..........................................................................115NC/W Operating Temperature Range ........................ -40NC to +125NC Storage Temperature Range............................ -65NC to +150NC Junction Temperature .....................................................+150NC Lead Temperature (soldering, 10s) ................................+300NC Soldering Temperature (reflow) ......................................+260NC
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
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 = VSHDN = 3.3V, VIN+ = VIN- = VCM = 0V, RL = 10kI to VCC/2, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted.) (Note 2) PARAMETER DC CHARACTERISTICS Input Voltage Range VIN+, VIN- Guaranteed by CMRR test TA = +25NC Input Offset Voltage VOS TA = -40NC to +125NC after power-up autocalibration TA = -40NC to +125NC Input Offset Voltage Drift VOS - TC TA = +40C to +25C TA = +70C TA = +85C TA = +125C VCM = -0.1V to VCC + 0.1V, TA = +25NC Common-Mode Rejection Ratio CMRR VCM = -0.1V to VCC + 0.1V, TA = -40NC to +125NC TA = +40C to +25C Input Offset Current (Note 3) IOS TA = +70C TA = +85C TA = +125C +0.4V P VOUT P VCC - 0.4V, RL = 10kI To VCC To GND RL = 10kI Output Voltage Low VOL RL = 600I RL = 32I 0.170 99 120 275 75 0.011 0.1 V 82 80 0.5 7 25 400 dB mA pA 100 dB 1 1 -0.1 23 VCC + 0.1 100 150 750 7 1.55 45 135 1.55 nA FV/NC pA FV V SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Bias Current (Note 3)
IB
Open-Loop Gain Output Short-Circuit Current (Note 4)
AOL ISC
2
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Low-Power, High-Efficiency, Single/Dual, Rail-to-Rail I/O Op Amps
ELECTRICAL CHARACTERISTICS (continued)
(VCC = VSHDN = 3.3V, VIN+ = VIN- = VCM = 0V, RL = 10kI to VCC/2, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted.) (Note 2) PARAMETER SYMBOL RL = 10kI Output Voltage High VOH RL = 600I RL = 32I AC CHARACTERISTICS Input Voltage Noise Density Input Voltage Noise Input Current Noise Density Gain Bandwidth Slew Rate Capacitive Loading Total Harmonic Distortion en In GBW SR CLOAD THD No sustained oscillation f = 10kHz, VOUT = 2VP-P, AV = 1V/V Guaranteed by PSRR TA = 0NC to +70NC, guaranteed by PSSR TA = +25NC TA = -40NC to +125NC Per amplifier, TA = +25NC Per amplifier MAX9613 only MAX9613 only MAX9613 only 1.4 10 20 10 1.8 1.7 85 83 220 305 420 1 0.5 106 f = 10kHz f = 10kHz 28 5 0.1 2.8 1.3 200 85 5.5 5.5 Total noise 0.1Hz P f P 10Hz nV/Hz FVP-P fA/Hz MHz V/Fs pF dB CONDITIONS MIN VCC 0.011 VCC 0.1 VCC 0.560 V TYP MAX UNITS
MAX9613/MAX9615
POWER-SUPPLY CHARACTERISTICS Power-Supply Range Power-Supply Rejection Ratio Quiescent Current Shutdown Supply Current Shutdown Input Low Shutdown Input High Output Impedance in Shutdown Turn-On Time from SHDN Power-Up Time VCC PSRR ICC ISHDN VIL VIH V dB FA FA V V MI Fs ms
ROUT_SHDN MAX9613 only MAX9613 only tON tUP
Note 2: All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design. Note 3: Guaranteed by design, not production tested. Note 4: Do not exceed package thermal dissipation in the Absolute Maximum Ratings section.
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Low-Power, High-Efficiency, Single/Dual, Rail-to-Rail I/O Op Amps MAX9613/MAX9615
Typical Operating Characteristics
(VCC = 3.3V, VIN+ = VIN- = 0V, VCM = VCC/2, RL = 10kI to VCC/2, values are at TA = +25NC, unless otherwise noted.)
OFFSET VOLTAGE vs. COMMON-MODE VOLTAGE vs. TEMPERATURE
MAX9613 toc01
OFFSET VOLTAGE vs. SUPPLY VOLTAGE
MAX9613 toc02
OFFSET VOLTAGE HISTOGRAM
35 30 OCCURANCE (%)
MAX9613 toc03
150 100 OFFSET VOLTAGE (V) 50 0 -50 -100 -150 -200 -0.5 0 TA = +125C TA = -40C TA = +25C
60 50 OFFSET VOLTAGE (V) 40 30 20 10 0
40
TA = +85C
25 20 15 10 5 0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 COMMON-MODE VOLTAGE (V)
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0
10
20
30
40
50
60
SUPPLY VOLTAGE (V)
OFFSET VOLTAGE (V)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX9613 toc04
SUPPLY CURRENT vs. TEMPERATURE
RLOAD = NO LOAD 250 SUPPLY CURRENT (A) 200 150 100 50 0 -50 -25 0 25 50 75 100 125 TEMPERATURE (C)
MAX9613 toc05
INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE
MAX9613 toc06
300 RLOAD = NO LOAD 250 SUPPLY CURRENT (A) 200 150 100 50 0
300
10,000 1000 INPUT BIAS CURRENT (pA) TA = +125C 100 10 1 0.1 TA = -40C 0.01 0 0.5 1.0 1.5 2.0 2.5 TA = 0C TA = +85C TA = +25C
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 SUPPLY VOLTAGE (V)
3.0
COMMON-MODE VOLTAGE (V)
INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE
MAX9613 toc07
INPUT BIAS CURRENT vs. TEMPERATURE
VCM = 0V INPUT BIAS CURRENT (pA) 10
MAX9613 toc08
POWER-UP TRANSIENT
MAX9613 toc09
1.0 0.8 INPUT BIAS CURRENT (pA) 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 0
TA = +25C
100
VOUT 200mV/div GND
1
0.1
VCC 2V/div GND -50 -25 0 25 50 75 100 125 4ms/div
0.01 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 COMMON-MODE VOLTAGE (V) TEMPERATURE (C)
4
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Low-Power, High-Efficiency, Single/Dual, Rail-to-Rail I/O Op Amps
Typical Operating Characteristics (continued)
(VCC = 3.3V, VIN+ = VIN- = 0V, VCM = VCC/2, RL = 10kI to VCC/2, values are at TA = +25NC, unless otherwise noted.)
COMMON-MODE REJECTION RATIO vs. FREQUENCY
MAX9613 toc10
MAX9613/MAX9615
INPUT VOLTAGE NOISE vs. FREQUENCY
MAX9613 toc11
INPUT CURRENT NOISE vs. FREQUENCY
MAX9613 toc12
120 COMMON-MODE REJECTION RATIO (dB) 100 80 60 40 20 0 0.001 0.01
100 90 INPUT VOLTAGE NOISE (nV/Hz) 80 70 60 50 40 30 20 10 0
0.30 INPUT CURRENT NOISE (fA/Hz) 0.25 0.20 0.15 0.10 0.05 0
0.1
1
10
100
1000 10,000
100
FREQUENCY (kHz)
1k 10k FREQUENCY (Hz)
100k
10
100
1k FREQUENCY (Hz)
10k
100k
RECOVERY FROM SHUTDOWN
MAX9613 toc13
TOTAL HARMONIC DISTORTION
TOTAL HARMONIC DISTORTION PLUS NOISE (dB)
MAX9613 toc14
TOTAL HARMONIC DISTORTION PLUS NOISE
VIN = 2VP-P AV = 1V/V
MAX9613 toc15
-60 TOTAL HARMONIC DISTORTION (dB) -70 -80 -90 -100 -110 -120
VIN = 2VP-P AV = 1V/V
0 -20 -40 -60 -80 -100 -120 10
VOUT 200mV/div GND
VCC 2V/div GND 10s/div
10
100
1k FREQUENCY (Hz)
10k
100k
100
1k FREQUENCY (Hz)
10k
100k
OUTPUT HIGH VOLTAGE vs. OUTPUT SOURCE CURRENT
3.3 OUTPUT HIGH VOLTAGE (V) 3.2 3.1 3.0 2.9 2.8 2.7 2.6 2.5 2.4 0 5 10 15 20 25 30 OUTPUT SOURCE CURRENT (mA) TA = +125C TA = +85C TA = -40C TA = +25C
MAX9613 toc16
OUTPUT LOW VOLTAGE vs. OUTPUT SINK CURRENT
0.16 OUTPUT LOW VOLTAGE (V) 0.14 0.12 0.10 0.08 0.06 0.04 0.02 0 0 5 TA = -40C 10 15 20 25 30 TA = +25C TA = +125C TA = +85C
MAX9613-15 toc17
0.1Hz TO 10Hz NOISE
MAX9613 toc18
3.4
0.18
VOUT 1V/div
10s/div
OUTPUT SINK CURRENT (mA)
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Low-Power, High-Efficiency, Single/Dual, Rail-to-Rail I/O Op Amps MAX9613/MAX9615
Typical Operating Characteristics (continued)
(VCC = 3.3V, VIN+ = VIN- = 0V, VCM = VCC/2, RL = 10kI to VCC/2, values are at TA = +25NC, unless otherwise noted.)
STABILITY vs. CAPACITIVE AND RESISTIVE LOAD IN PARALLEL
MAX9613 toc19
OPEN-LOOP GAIN vs. FREQUENCY
120 100 OPEN-LOOP GAIN (dB) 80 60 40 20 0 0.001 0.01 14 12 RESISTIVE LOAD (kI) 10 8 6 4 2
UNSTABLE
STABLE 0 0.1 1 10 100 1000 10,000 0 100 200 300 400 500 600 700 800 900 1000 CAPACITIVE LOAD (pF) FREQUENCY (kHz)
STABILITY vs. CAPACITANCE WITH SERIES ISOLATION RESISTOR
70 ISOLATION RESISTOR (I) 60 50 40 30 20 10 0 0 200 400 600 800 1000 1200 UNSTABLE VIN 50mV/div GND STABLE
MAX9613 toc21
100mV STEP RESPONSE CLOAD = 200pF
80
MAX9613 toc22
VOUT 50mV/div GND
1s/div
CAPACITIVE LOAD (pF)
2V STEP RESPONSE CLOAD = 200pF
RECOVERY FROM SATURATION OUTPUT SATURATED TO GND
MAX9613 toc23 MAX9613 toc24
AV = 10V/V VOUT 1V/div GND GND VOUT 500mV/div
VIN 1V/div GND 4s/div
VIN 50mV/div GND 10s/div
6
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MAX9613 toc20
Low-Power, High-Efficiency, Single/Dual, Rail-to-Rail I/O Op Amps
Typical Operating Characteristics (continued)
(VCC = 3.3V, VIN+ = VIN- = 0V, VCM = VCC/2, RL = 10kI to VCC/2, values are at TA = +25NC, unless otherwise noted.)
RECOVERY FROM SATURATION OUTPUT SATURATED TO VCC OUTPUT IMPEDANCE vs. FREQUENCY
MAX9613 toc26
MAX9613/MAX9615
MAX9613 toc25
25 20 RESISTANCE (I) 15 10 5
VOUT 1V/div
AV = 10V/V
GND VIN 1V/div GND
0 10s/div 0 0.1 1 10 100 1000 10,000 FREQUENCY (kHz)
Pin Configuration
TOP VIEW NOT TO SCALE
+ IN+ 1 GND 2 IN- 3 MAX9613 6 VCC 5 SHDN INA+ 3 4 OUT GND 4 6 INB5 INB+ OUTA 1 INA- 2 + MAX9615 8 VCC 7 OUTB
6 SC70
8 SC70
Pin Description
PIN MAX9613 1 -- -- 2 3 -- -- 4 -- -- 5 6 MAX9615 -- 3 5 4 -- 2 6 -- 1 7 -- 8 NAME IN+ INA+ INB+ GND ININAINBOUT OUTA OUTB SHDN VCC Positive Input Positive Input A Positive Input B Ground Negative Input Negative Input A Negative Input B Output Output A Output B Active-Low Shutdown Positive Power Supply. Bypass with a 0.1FF capacitor to ground. 7 FUNCTION
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Low-Power, High-Efficiency, Single/Dual, Rail-to-Rail I/O Op Amps MAX9613/MAX9615
Detailed Description
The MAX9613/MAX9615 are low-power op amps ideal for signal processing applications due to their high precision and CMOS inputs. The MAX9613 also features a low-power shutdown mode that greatly reduces quiescent current while the device is not operational. The MAX9613/MAX9615 self-calibrate on power-up to eliminate effects of temperature and power-supply variation. These op amps feature an integrated charge pump that creates an internal voltage rail 1V above VCC that is used to power the input differential pair of pMOS transistors. This unique architecture eliminates crossover distortion common in traditional complementary pair type of input architecture. In these op amps, an inherent input offset voltage difference between the nMOS pair and pMOS pair of transistors causes signal degradation as shown in Figure 1. By using a single pMOS pair of transistors, this source of input distortion is eliminated, making these parts extremely useful in noninverting configurations such as Sallen-Key filters. The charge pump requires no external components and is entirely transparent to the user. See Figure 2. The MAX9613/MAX9615 feature robust internal EMI filters that reduce the devices' susceptibility to high-frequency RF signals such as from wireless and mobile devices. This, combined with excellent DC and AC specifications, makes these devices ideal for a wide variety of portable audio and sensitive signal-conditioning applications.
Crossover Distortion
RF Immunity
INTERNAL CHARGE PUMP
STANDARD INPUT STRUCTURE
MAX9613/MAX9615 INPUT STRUCTURE
Figure 1. Rail-to-Rail Input Stage Architectures
AMPLIFIER OUTPUT
CROSSOVER DISTORTION
Figure 2. Crossover Distortion When Using Standard Rail-to-Rail Input Stage Architecture. The Input Stage Design Eliminates This Drawback. 8 ______________________________________________________________________________________
Low-Power, High-Efficiency, Single/Dual, Rail-to-Rail I/O Op Amps
Applications Information
The MAX9613/MAX9615 feature an automatic autotrim that self-calibrates the VOS of these devices to less than 100FV of input offset voltage (Figure 3). The autotrim sequence takes approximately 3ms to complete, and is triggered by an internal power-on reset (POR) threshold of 0.5V. During this time, the inputs and outputs are put into high impedance and left unconnected. This selfcalibration feature allows the device to eliminate input offset voltage effects due to power supply and operating temperature variation simply by cycling its power. If the power supply glitches below the 0.5V threshold, the POR circuitry reactivates during next power-up. The MAX9613 features an active-low shutdown mode that puts both inputs and outputs into a high-impedance state. In this mode, the quiescent current is less than 1FA. Putting the output in high impedance allows multiple signal outputs to be multiplexed onto a single output line without the additional external buffers. The device does not self-calibrate when exiting shutdown mode, and retains its power-up trim settings. The device also instantly recovers from shutdown. The shutdown logic levels of the device are independent of supply, allowing the shutdown to be operated by either a 1.8V or 3.3V microcontroller.
TIME FOR POWER SUPPLY TO SETTLE
Power-Up Autotrim
The input voltage range of the MAX9613/MAX9615 extends 100mV above VCC and below ground. The wide input common-mode voltage range allows the op amp to be used as a buffer and as a differential amplifier in a wide variety of signal processing applications. Output voltage low is designed to be especially close to ground--it is only 11mV above ground, allowing maximum dynamic range in single-supply applications. High output current and capacitance drive capability of the part help it to be useful in ADC driver and line driver applications. The MAX9615 dual amplifier's low power and tiny size is ideal for driving multichannel analog-to-digital converters (ADCs) such as the MAX11613. See the Typical Application Circuit. The MAX11613 is a low-power, 12-bit I2C ADC that measures either four single-ended or two differential channels in an 8-pin FMAX(R) package. Operating from a single 3V or 3.3V supply, the MAX11613 draws a low 380FA supply current when sampling at 10ksps. The MAX11613 family also offers pincompatible 5V ADCs (MAX11612) and 8-bit (MAX11601) and 10-bit (MAX11607) options. The MAX9613/MAX9615 feature a high-impedance CMOS input stage and a specialized ESD structure that allows low input bias current operation at low input common-mode voltages. Low input bias current is useful when interfacing with high-ohmic sensors. It is also beneficial for designing transimpedance amplifiers for photodiode sensors. This makes these MAX9613/ MAX9615 devices ideal for ground referenced medical and industrial sensor applications. The MAX9613/MAX9615 are ideal for a wide variety of active filter circuits that make use of their rail-to-rail input/ output stages and high-impedance CMOS inputs. The Typical Application Circuit shows an example Sallen-Key active filter circuit with a corner frequency of 10kHz. At low frequencies, the amplifier behaves like a simple lowdistortion noninverting buffer, while its high bandwidth gives excellent stopband attenuation above its corner frequency. See the Typical Application Circuit.
Rail-to-Rail Input/Output
MAX9613/MAX9615
Interfacing with the MAX11613
Shutdown Operation
Input Bias Current
5V VCC
Active Filters
0.5V 0V 2V CALIBRATED AMPLIFIER ACTIVE
VOUT
AUTOTRIM SEQUENCE
0V
0.4 ms 10ms
Chip Information
PROCESS: BiCMOS
MAX is a registerred trademark of Maxim Integrated Products, Inc. 9
Figure 3. Autotrim Timing Diagram
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Low-Power, High-Efficiency, Single/Dual, Rail-to-Rail I/O Op Amps MAX9613/MAX9615
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
PACKAGE TYPE 6 SC70 8 SC70 PACKAGE CODE X6SN-1 X8SN-1 OUTLINE NO. 21-0077 21-0460 LAND PATTERN NO. 90-0189 90-0348
SC70, 6L.EPS
10
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Low-Power, High-Efficiency, Single/Dual, Rail-to-Rail I/O Op Amps
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
MAX9613/MAX9615
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Low-Power, High-Efficiency, Single/Dual, Rail-to-Rail I/O Op Amps MAX9613/MAX9615
Revision History
REVISION NUMBER 0 REVISION DATE 8/10 Initial release DESCRIPTION PAGES CHANGED --
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.
12
(c)
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 2010 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.

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