Datasheet

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General Description

The MAX4122–MAX4129 family of operational amplifiers

combines wide bandwidth and excellent DC accuracy with

Rail-to-Rail

operation at the inputs and outputs. These

devices require only 650µA per amplifier, and operate from

either a single supply (+2.7V to +6.5V) or dual supplies

(±1.35V to ±3.25V) with a common-mode voltage range

that extends 250mV beyond V

and V

. They are capa-

ble of driving 250Ω loads. The MAX4122/MAX4123/

MAX4126/MAX4127/MAX4129 have a 5MHz gain band-

width product, while the decompensated MAX4124/

MAX4125/MAX4128 (stable at closed-looped gains of

10 or greater) have a 25MHz gain bandwidth product. In

addition, the MAX4123/MAX4125/MAX4127 feature a

shutdown mode in which the outputs are placed in a

high-impedance state and the supply current is reduced

to only 25µA per amplifier.

With their rail-to-rail input common-mode range and

output swing, these amplifiers are ideal for low-voltage

single-supply operation. Although the minimum operat-

ing voltage is specified at 2.7V, the devices typically

operate down to 1.8V. In addition, low offset voltage

and high speed make them the ideal signal-condition-

ing stages for precision, low-voltage, data-acquisition

systems. The MAX4122 and MAX4124 come in the

space-saving 5-pin SOT23-5 package.

________________________Applications

Battery-Powered Instruments

Portable Equipment

Data-Acquisition Systems

Signal Conditioning

Low-Power, Low-Voltage Applications

Features

♦ 5-Pin SOT23 Package (MAX4122/4)

♦ +2.7V to +6.5V Single-Supply Operation

♦ Rail-to-Rail Input Common-Mode Voltage Range

♦ Rail-to-Rail Output Voltage Swing

♦ 5MHz Gain-Bandwidth Product (MAX4122/3/6/7/9)

25MHz Gain-Bandwidth Product (MAX4124/5/8)

♦ 650µA Quiescent Current per Amplifier

♦ 25µA Shutdown Function (MAX4123/5/7)

♦ 200µV Offset Voltage

♦ No Phase Reversal for Overdriven Inputs

♦ Drive 250Ω Loads

♦ Stable with 500pF Capacitive Loads

♦ Unity-Gain Stable (MAX4122/3/6/7/9)

Stable at Gains ≥ 10V/V (MAX4124/5/8)

MAX4122–MAX4129

Single/Dual/Quad, Wide-Bandwidth, Low-Power,

Single-Supply Rail-to-Rail I/O Op Amps

________________________________________________________________

Maxim Integrated Products

MAX187

MAX4123

SHDN

+5V

AIN

VREF

GND

DOUT

SERIAL

INTERFACE

SCLK

__________Typical Operating Circuit

Selection Table

19-1087; Rev 1; 8/97

PART

MAX4122EUK

MAX4123C/D

MAX4123ESA -40°C to +85°C

0°C to +70°C

-40°C to +85°C

TEMP. RANGE

PIN-

PACKAGE

5 SOT23-5

Dice*

8 SO

Ordering Information

Ordering Information continued at end of data sheet.

Dice are specified at T

= +25°C, DC parameters only.

Pin Configurations appear at end of data sheet.

MARKING

INFO.

AAAZ

—

(MHz)

AMPS

PER

PKG.

MAX4122 5 1

MAX4123 5 1

PART

MAX4124 25 1

MAX4125 25 1

MAX4126 5 2

MAX4127 5 2

MAX4128 25 2

MAX4129 5 4

SHUT-

DOWN

MODE

—

Yes

—

Yes

—

Yes

—

PIN-

PACKAGE

5 SOT23-5

8 SO/µMAX

5 SOT23-5

8 SO/µMAX

14 SO

8 SO/µMAX

14 SO

MAX4123EUA -40°C to +85°C 8 µMAX —

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

Summary of content (16 pages)

PAGE 1
9-1087; Rev 1; 8/97 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps ________________________Applications Features ♦ 5-Pin SOT23 Package (MAX4122/4) ♦ +2.7V to +6.
PAGE 2
MAX4122–MAX4129 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC-VEE).....................................................7.5V IN+, IN-, SHDN Voltage ...................(VCC + 0.3V) to (VEE - 0.3V) Output Short-Circuit Duration (Note 1).......................Continuous (short to either supply) Continuous Power Dissipation (TA = +70°C) 5-pin SOT23-5 (derate 7.1mW/°C above +70°C) .........571mW 8-pin SO (derate 5.
PAGE 3
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps (VCC = +2.7V to +6.5V, V EE = 0V, V CM = 0V, V OUT = V CC/2, R L tied to V CC/2, SHDN ≥ 2V (or open), T A = +25°C, unless otherwise noted.
PAGE 4
MAX4122–MAX4129 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps DC ELECTRICAL CHARACTERISTICS (continued) (VCC = +2.7V to +6.5V, VEE = 0V, VCM = 0V, VOUT = VCC/2, RL tied to VCC/2, SHDN ≥ 2V (or open), TA = -40°C to +85°C, unless otherwise noted.) PARAMETER CONDITIONS Power-Supply Rejection Ratio VCC = 2.7V to 6.5V Off-Leakage Current SHDN < 0.8V, VOUT = 0V to VCC VCC = 2.
PAGE 5
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps (VCC = +2.7V to +6.5V, VEE = 0V, SHDN ≥ 2V (or open), TA = +25°C, unless otherwise noted.) PARAMETER CONDITIONS VCC = 3V, VOUT = VCC/2, MAX4123/25/27 SHDN Delay MIN TYP Enable 1 Disable 0.2 Input Capacitance MAX UNITS µs 3 pF Input Noise Voltage Density f = 1kHz 22 nV/√Hz Input Noise Current Density f = 1kHz 0.
PAGE 6
Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0V, VCM = VCC/2, TA = +25°C, unless otherwise noted.) 100 90 80 70 10 1 MAX4122/29-09 AV = +10 OUTPUT IMPEDANCE (Ω) 110 100 MAX4122/29-08 AV = +1 OUTPUT IMPEDANCE (Ω) 120 CHANNEL SEPARATION (dB) 100 MAX4122/29-07 130 MAX4124/25/28 OUTPUT IMPEDANCE vs. FREQUENCY MAX4122/23/26/27/29 OUTPUT IMPEDANCE vs. FREQUENCY MAX4126/27/28/29 CHANNEL SEPARATION vs. FREQUENCY 10 1 0.1 60 1M 10M SUPPLY CURRENT PER AMPLIFIER vs.
PAGE 7
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps MINIMUM OUTPUT VOLTAGE vs. TEMPERATURE 105 100 VCC = 6.5V, RL = 500Ω 150 VCC = 2.7V, RL = 500Ω 100 VCM = 0.2V TO 5.2V VCC = 6.5V, RL = 100kΩ 50 35 50 80 -40 -25 -10 95 5 20 35 50 65 0 80 95 -40 -25 -10 65 LARGE-SIGNAL GAIN vs. TEMPERATURE 120 VCC = 6.5V RL TO VEE 110 125 MAX4122/29-20 RL = 100kΩ 100 120 RL = 500Ω RL = 2kΩ 80 70 60 60 100 95 VCC = 6.
PAGE 8
Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0V, VCM = VCC/2, TA = +25°C, unless otherwise noted.) 1.8 AV = +1 2Vp-p SIGNAL 500kHz LOWPASS FILTER RL = 10kΩ TO VCC/2 0.035 0.030 1.6 1.5 1.4 0.025 THD + N (%) THD & NOISE (%) 1.7 0.020 0.015 AV = +1 10kHz SINEWAVE RL TO VCC/2 500kHz LOWPASS FILTER 0.01 RL = 2kΩ RL = 250Ω 0.010 RL = 10kΩ 0.005 0.001 0 5 20 35 50 65 80 10 95 100 TEMPERATURE (°C) MAX4122/23/26/27/29 SMALL-SIGNAL TRANSIENT RESPONSE (NONINVERTING) 4.
PAGE 9
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps MAX4122/29-33 AV = +10 MAX4122/29-35 MAX4124/25/28 LARGE-SIGNAL TRANSIENT RESPONSE (INVERTING) MAX4124/25/28 LARGE-SIGNAL TRANSIENT RESPONSE (NONINVERTING) AV = -10 IN (200mV/div) IN (200mV/div) OUT (2V/div) OUT (2V/div) TIME (2µs/div) TIME (2µs/div) Pin Description PIN NAME FUNCTION MAX4122 MAX4124 MAX4123 MAX4125 MAX4126 MAX4128 MAX4127 MAX4129 1 6 — — — OUT Output 2 4 4 4 11 VEE Negative S
PAGE 10
MAX4122–MAX4129 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps MAX4122– MAX4129 R3 R3 = R1 R2 R3 R3 = R1 R1 R2 Figure 1a. Reducing Offset Error Due to Bias Current (Noninverting) R2 R1 R2 Figure 1b. Reducing Offset Error Due to Bias Current (Inverting) 1k 1k Figure 2.
PAGE 11
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps Rail-to-Rail Input Stage IBIAS = VDIFF - 1.8V 2kΩ Rail-to-Rail Output Stage The minimum output voltage will be within millivolts of ground for single-supply operation where the load is referenced to ground (VEE). Figure 3 shows the input voltage range and output voltage swing of a MAX4123 connected as a voltage follower.
PAGE 12
AV = +10 CL = 500pF IN (5mV/div) IN VOLTAGE VOLTAGE (50mV/div) AV = +1 CL = 500pF OUT (50mV/div) OUT TIME (1µs/div) TIME (400ns/div) Figure 5. MAX4122/23/26/27/29 Small-Signal Transient Response with Capacitive Load IN Figure 6.
PAGE 13
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps OUT ICC (500µA/div) VOLTAGE (1V/div) VCC (1V/div) TIME (5µs/div) Figure 11. Power-Up Output Voltage MAX4122–MAX4129 VCC TIME (5µs/div) Figure 12. Power-Up Supply Current VCC = 2.7V RL = 10kΩ VCC = 2.7V SHDN (1V/div) SHDN (1V/div) OUT (0.5V/div) ICC (500µA/div) TIME (2µs/div) Figure 13. Shutdown Output Voltage TIME (2µs/div) Figure 14.
PAGE 14
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps MAX4122–MAX4129 Pin Configurations TOP VIEW OUT 1 VEE 2 5 VCC 4 IN- MAX4122 MAX4124 IN+ 3 SOT23-5 N.C. 1 IN1- 2 IN1+ 3 MAX4123 MAX4125 VEE 4 OUT1 1 8 SHDN 7 VCC IN1- 2 6 OUT IN1+ 3 5 N.C. VEE 4 OUT1 1 14 VCC IN1- 2 IN1+ 3 VEE 4 MAX4127 14 7 OUT2 6 IN2- 5 IN2+ OUT1 1 14 OUT4 13 OUT2 IN1- 2 13 IN4- 12 IN2- IN1+ 3 12 IN4+ 11 IN2+ VCC 4 10 N.C.
PAGE 15
Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps PART TEMP. RANGE PINPACKAGE MARKING INFO.
PAGE 16
________________________________________________________Package Information SOT5L.EPS MAX4122–MAX4129 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps 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.