Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Op-amp Multi-purpose SC 70 8

3V/5V Low-Power, Low-Noise, CMOS,

Rail-to-Rail I/O Op Amps

MAX9636/MAX9637/MAX9638

EVALUATION KIT AVAILABLE

19-5228; Rev 3; 1/15

General Description

The MAX9636/MAX9637/MAX9638 are single-supply,

CMOS input op amps featuring wide bandwidth at low

quiescent current, making them suitable for a broad

range of battery-powered applications such as portable

medical instruments, portable media players, and smoke

detectors. A combination of extremely low input bias

currents, low input current noise and low input voltage

noise allows interface to high-impedance sources such

as photodiode and piezoelectric sensors.

The ICs feature a maximized ratio of gain bandwidth

(GBW) to supply current. The devices operate from a

single 2.1V to 5.5V supply at a typical quiescent supply

current of 36µA. For additional power conservation, the

MAX9636 and MAX9638 offer a low-power shutdown

mode that reduces supply current to 1µA and places the

amplifiers’ outputs into a high-impedance state.

The ICs are specified over the automotive operating tem-

perature range (-40°C to +125°C). The single is offered

in a space-saving, 6-pin SC70 package, while the dual is

offered in tiny, 8-pin SC70 and 10-pin UTQFN packages.

Applications

Portable Medical Instruments

Piezoelectric Transducer Amplifiers

Smoke Detectors

Battery-Powered Devices

Transimpedance Amplifiers

Tablets

Benefits and Features

S Ideal for Precision Transimpedance Amplifier

Applications

Ultra-Low 0.1pA Bias Current

Wide 1.5MHz Bandwidth

Low Input Current-Noise Density: 0.9fA/√Hz

S Extend Battery Life

Single-Supply Operation V

= 2.1V to 5.5V

Low 36µA Quiescent Current

1µA Quiescent Current in Shutdown

S Save Board Space

6- and 8-Pin SC70 and 10-Pin UTQFN Packages

Ordering Information

+Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

Block Diagram

PART TEMP RANGE PIN-PACKAGE

MAX9636AXT+ -40NC to +125NC 6 SC70

MAX9637AXA+ -40NC to +125NC 8 SC70

MAX9638AVB+ -40NC to +125NC 10 UTQFN

SIGNAL

CONDITIONING/

FILTERS

PHOTODIODE

IN-

IN+

OUT

REF

ADC

MAX1286

MAX9636

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

Summary of content (16 pages)

PAGE 1
EVALUATION KIT AVAILABLE MAX9636/MAX9637/MAX9638 3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps General Description Benefits and Features The MAX9636/MAX9637/MAX9638 are single-supply, CMOS input op amps featuring wide bandwidth at low quiescent current, making them suitable for a broad range of battery-powered applications such as portable medical instruments, portable media players, and smoke detectors.
PAGE 2
MAX9636/MAX9637/MAX9638 3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps ABSOLUTE MAXIMUM RATINGS VDD, SHDN to VSS...................................................-0.3V to +6V IN+, IN-, OUT.....................................GND - 0.3V to VDD + 0.3V Continuous Input Current (any pins)................................ Q20mA Output Short Circuit to VDD or VSS Duration...........................
PAGE 3
MAX9636/MAX9637/MAX9638 3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps ELECTRICAL CHARACTERISTICS (continued) (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VCM = VDD/2, RL = 10kI to VDD/2, SHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted.
PAGE 4
MAX9636/MAX9637/MAX9638 3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps Typical Operating Characteristics (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VCM = VDD/2, RL = 10kI to VDD/2, SHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted.) OFFSET VOLTAGE THERMAL COEFFICIENT HYSTOGRAM 12 10 8 6 35 4 15 10 TA = +25°C 150 100 TA = +85°C 50 TA = +125°C 0 COMMON-MODE VOLTAGE (V) INPUT OFFSET VOLTAGE vs. SUPPLY VOLTAGE VCM = VDD/2 INPUT BIAS CURRENT vs.
PAGE 5
MAX9636/MAX9637/MAX9638 3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps Typical Operating Characteristics (continued) (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VCM = VDD/2, RL = 10kI to VDD/2, SHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted.
PAGE 6
MAX9636/MAX9637/MAX9638 3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps Typical Operating Characteristics (continued) (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VCM = VDD/2, RL = 10kI to VDD/2, SHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted.) 0.1Hz TO 10Hz VOLTAGE vs. TIME INPUT CURRENT NOISE vs. FREQUENCY 9 INPUT CURRENT NOISE (fA/√Hz) MAX9636 toc20 MAX9636 toc19 10 8 5µVP-P NOISE 7 6 2µV/div 5 4 3 2 1 0 1 0.
PAGE 7
MAX9636/MAX9637/MAX9638 3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps Typical Operating Characteristics (continued) (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VCM = VDD/2, RL = 10kI to VDD/2, SHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted.) STABILITY vs. CAPACITIVE AND RESISTIVE LOAD RISO IN SERIES WITH CLOAD PERCENT OVERSHOOT vs.
PAGE 8
MAX9636/MAX9637/MAX9638 3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps Pin Configurations TOP VIEW IN+ 1 + MAX9636 VSS 2 IN- 3 6 VDD 5 SHDN OUTA 1 INAINA+ 8 VDD 2 7 OUTB 3 6 INB- 5 INB+ VSS 4 OUT 4 + MAX9637 SC70 SC70 SHDNB SHDNA 7 OUTA 8 INA- 9 OUTB 10 6 MAX9638 + 1 2 VDD INB+ 5 VSS 4 INA+ 3 INB- UTQFN Pin Description PIN MAX9636 (6 SC70) MAX9637 (8 SC70) MAX9638 (10 UTQFN) 8 NAME FUNCTION 1 — — IN+ — 3 4 INA+ Positive Input Positi
PAGE 9
MAX9636/MAX9637/MAX9638 3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps Detailed Description The MAX9636/MAX9637/MAX9638 are single-supply, CMOS input op amps. They feature wide bandwidth at low quiescent current, making them suitable for a broad range of battery-powered applications such as portable medical instruments, portable media players, and smoke detectors.
PAGE 10
MAX9636/MAX9637/MAX9638 3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps High-Impedance Sensor Front-Ends Driving Capacitive Loads The ICs have a high tolerance for capacitive loads. In unity-gain configuration, the op amps can typically drive up to 300pF pure capacitive load. Increasing the gain enhances the amplifier’s ability to drive greater capacitive loads.
PAGE 11
MAX9636/MAX9637/MAX9638 3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps For best performance, follow standard high-impedance layout techniques, which include the following: U Using shielding techniques to guard against parasitic leakage paths. For example, put a trace connected to the noninverting input around the inverting input. U Minimizing the amount of stray capacitance connected to op amp’s inputs to improve stability.
PAGE 12
MAX9636/MAX9637/MAX9638 3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps Package Information For the latest package outline information and land patterns, go to www.maximintegrated.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 12 PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
PAGE 13
MAX9636/MAX9637/MAX9638 3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps Package Information (continued) For the latest package outline information and land patterns, go to www.maximintegrated.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.
PAGE 14
MAX9636/MAX9637/MAX9638 3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps Package Information (continued) For the latest package outline information and land patterns, go to www.maximintegrated.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.
PAGE 15
MAX9636/MAX9637/MAX9638 3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps Package Information (continued) For the latest package outline information and land patterns, go to www.maximintegrated.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.
PAGE 16
MAX9636/MAX9637/MAX9638 3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps Revision History REVISION NUMBER REVISION DATE 0 6/10 Initial release 1 9/10 Removed future product references, updated Input Offset Voltage Drift conditions, updated Output Short-Circuit Current typ value, updated Input Current Noise Density typ value, and added Crosstalk parameter to the Electrical Characteristics table, modified TOCs 12, 14, 19 2 1/11 Corrected the MAX9637 pin configuration 8 1/15 Updated Appl