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General Description

The MAX4322/MAX4323/MAX4326/MAX4327/MAX4329

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

(+2.4V to +6.5V) or dual supplies (±1.2V to ±3.25V). These

unity-gain-stable amplifiers are capable of driving 250Ω

loads and have a 5MHz gain-bandwidth product. The

MAX4323 and MAX4327 feature a low-power shutdown

mode that reduces supply current to 25µA and places the

outputs in a high-impedance state.

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

output swing, these amplifiers are ideal for low-voltage,

single-supply operation. In addition, low offset voltage

and high speed make them the ideal signal-condition-

ing stages for precision, low-voltage data-acquisition

systems. The MAX4322/MAX4323 are available in

space-saving SOT23 packages.

________________________Applications

Battery-Powered Instruments

Portable Equipment

Data-Acquisition Systems

Signal Conditioning

Low-Power, Low-Voltage Applications

____________________________Features

♦ SOT23 Packages (MAX4322/MAX4323)

♦ +2.4V to +6.5V Single-Supply Operation

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

♦ Rail-to-Rail Output Voltage Swing

♦ 5MHz Gain-Bandwidth Product

♦ 650µA Quiescent Current per Amplifier

♦ 700µV Offset Voltage

♦ No Phase Reversal for Overdriven Inputs

♦ Drive 250Ω Loads

♦ 25µA Shutdown Mode (MAX4323/MAX4327)

♦ Unity-Gain Stable for Capacitive Loads

up to 500pF

MAX4322/MAX4323/MAX4326/MAX4327/MAX4329

Single/Dual/Quad, Low-Cost, SOT23,

Low-Power, Rail-to-Rail I/O Op Amps

________________________________________________________________ Maxim Integrated Products 1

Typical Operating Circuit

19-1380; Rev 2a; 12/99

PART

MAX4322EUK-T

MAX4322ESA

-40°C to +85°C

TEMP. RANGE

PIN-

PACKAGE

5 SOT23-5

8 SO

Ordering Information

Pin Configurations appear at end of data sheet.

TOP

MARK

ACGE

—

(MHz)

NO. OF

AMPS

MAX4322 5 1

PART

MAX4323 5 1

MAX4329 5 4

PIN-

PACKAGE

5 SOT23-5,

8 µMAX/SO

8 µMAX/SO/

6 SOT23-6

14 SO

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

SHUTDOWN

—

Yes

—

—MAX4326 5 2 8 µMAX/SO

YesMAX4327 5 2

10 µMAX, 14 SO

MAX4323ESA

-40°C to +85°C 8 SO —

MAX4323EUA -40°C to +85°C 8 µMAX —

MAX4322EUA -40°C to +85°C 8 µMAX —

MAX4326EUA

-40°C to +85°C 8 µMAX —

MAX4326ESA -40°C to +85°C 8 SO —

MAX4327ESD -40°C to +85°C 14 SO —

MAX4327EUB

-40°C to +85°C 10 µMAX —

MAX4329ESD

-40°C to +85°C 14 SO —

Selector Guide

MAX187

MAX4322

SHDN

+5V

AIN

VREF

GND

DOUT

SERIAL

INTERFACE

SCLK

MAX4323EUT -40°C to +85°C 6 SOT23-6 AAEC

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

Summary of content (12 pages)

PAGE 1
9-1380; Rev 2a; 12/99 Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail I/O Op Amps ____________________________Features The MAX4322/MAX4323/MAX4326/MAX4327/MAX4329 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 (+2.4V to +6.5V) or dual supplies (±1.2V to ±3.25V).
PAGE 2
MAX4322/MAX4323/MAX4326/MAX4327/MAX4329 Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail I/O Op Amps ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC-VEE) ..................................................+7.5V All Other Pins ...................................(VCC + 0.3V) to (VEE - 0.3V) Output Short-Circuit Duration.....................................Continuous (short to either supply) Continuous Power Dissipation (TA = +70°C) 5-pin SOT23-5 (derate 7.1mW/°C above +70°C) .........
PAGE 3
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail I/O Op Amps MAX4322/MAX4323/MAX4326/MAX4327/MAX4329 DC ELECTRICAL CHARACTERISTICS—TA = +25°C (continued) (VCC = +5V, VEE = 0, VCM = 0, VOUT = VCC / 2, SHDN = VCC, RL tied to VCC / 2, unless otherwise noted.
PAGE 4
MAX4322/MAX4323/MAX4326/MAX4327/MAX4329 Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail I/O Op Amps DC ELECTRICAL CHARACTERISTICS —TA = -40°C to +85°C (continued) (VCC = +5V, VEE = 0, VCM = 0, VOUT = VCC / 2, SHDN = VCC, RL tied to VCC / 2, unless otherwise noted.) (Note 1) PARAMETER CONDITIONS Power-Supply Rejection Ratio VCC = 2.4V to 6.5V Large-Signal Voltage Gain VOUT = 0.4V to 4.
PAGE 5
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail I/O Op Amps GAIN AND PHASE vs. FREQUENCY (WITH CLOAD) 60 180 144 144 72 20 36 0 -36 PHASE 72 36 0 0 -36 PHASE -108 AV = +1000 NO LOAD -40 100 1k AV = +1000 RL = ∞ CL = 500pF -20 -144 10k 100k 1M 10M -40 100 -180 100M 1k -144 1M 10M 10 100 1k 10k 110 100 90 80 70 MAX4322/26/29-05 AV = +1 OUTPUT IMPEDANCE (Ω) 120 1M 10M 100M MAX4323/MAX4327 SHUTDOWN SUPPLY CURRENT vs.
PAGE 6
_____________________________Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0, VCM = VCC / 2, SHDN = VCC, TA = +25°C, unless otherwise noted.) 10 0 -10 -20 VCC = 2.7V, VCM = VEE -30 -40 100 5 20 MAX4322/26/29-11 MAX4322/26/29-10 105 95 200 VCC = 6.5V, RL = 500Ω 150 VCC = 2.7V, RL = 500Ω 100 VCM = -0.2V TO 5.2V 90 VCC = 6.5V, RL = 100kΩ 50 35 50 65 80 95 VCC = 2.
PAGE 7
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail I/O Op Amps (VCC = +5V, VEE = 0, VCM = VCC / 2, SHDN = VCC, TA = +25°C, unless otherwise noted.) VCC = 2.7V, RL TO VCC 90 85 VOUT(p-p) = VCC - 600mV RL = 100kΩ 80 75 5 20 35 50 65 80 1.5 0.025 0.020 0.015 1.4 0.010 1.3 95 0.005 0 -40 -25 -10 5 20 35 50 65 80 TEMPERATURE (°C) TOTAL HARMONIC DISTORTION AND NOISE vs.
PAGE 8
MAX4322/MAX4323/MAX4326/MAX4327/MAX4329 Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail I/O Op Amps Pin Description PIN MAX4322 MAX4323 SOT23-5 SO/µMAX SOT23-6 SO/µMAX MAX4326 MAX4327 µMAX SO FUNCTION 1 6 1 6 — — — — OUT Output 2 4 2 4 4 4 4 11 VEE Negative Supply. Ground for single-supply operation.
PAGE 9
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail I/O Op Amps 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 MAX4322 connected as a voltage follower. With a +3V supply and the load tied to ground, the output swings from 0.00V to 2.90V.
PAGE 10
Power-Up and Shutdown Mode Power Supplies and Layout The MAX4322/MAX4323/MAX4326/MAX4327/MAX4329 amplifiers typically settle within 1µs after power-up. Using the test circuit of Figure 8, Figures 9 and 10 show the output voltage and supply current on power-up. The MAX4323 and MAX4327 have a shutdown option. When the shutdown pin (SHDN) is pulled low, the supply current drops below 25µA per amplifier and the amplifiers are disabled with the outputs in a highimpedance state.
PAGE 11
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail I/O Op Amps MAX4322/MAX4323/MAX4326/MAX4327/MAX4329 VCC MAX4322/MAX4323 MAX4326/MAX4327 MAX4329 0V TO 2.7V STEP FOR POWER-UP TEST 2k RS VOUT CL MAX4322/MAX4323 MAX4326/MAX4327 MAX4329 Figure 7. Capacitive-Load-Driving Circuit VCC SUPPLY-CURRENT 10Ω MONITORING POINT 2k 10k Figure 8. Power-Up Test Circuit VOLTAGE (1V/div) VCC (1V/div) OUT ICC (500µA/div) TIME (5µs/div) TIME (5µs/div) Figure 9. Power-Up Output Voltage Figure 10.
PAGE 12
MAX4322/MAX4323/MAX4326/MAX4327/MAX4329 Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail I/O Op Amps ___________________________________________________________Pin Configurations TOP VIEW OUT 1 VEE 2 5 OUT 1 VCC MAX4322 IN+ 3 VEE 2 IN+ 3 IN- 4 IN1- 2 MAX4326 8 VCC 7 OUT2 IN1+ 3 6 IN2- VEE 4 5 IN2+ SO/µMAX VCC 5 SHDN 8 N.C. N.C. 1 7 VCC IN1- 2 IN1+ 3 6 OUT VEE 4 5 N.C. N.C.