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General Description

The MAX480 is a precision micropower operational ampli-

fier with flexible power-supply capability. Its guaranteed

140µV maximum offset voltage (25µV typ) is the lowest of

any micropower op amp. Similarly, input bias current,

input offset current, and drift specifications are within tight

limits.

Both the input and output voltage ranges include the neg-

ative supply rail, allowing maximum signal range capabili-

ty in single-supply applications. The MAX480 operates

with either a single supply ranging from +1.6V to +36V or

dual supplies from ±0.8V to ±18V. The MAX480 con-

sumes less than 20µA, allowing operation in excess of

10,000 hours from a 250mA-hr lithium coin cell. Even with

a minimal quiescent current, the amplifier sinks or sources

5mA from its output.

The MAX480 is available in 8-pin DIP and SO packages in

commercial, extended, and military temperature ranges.

Applications

Precision Micropower Amplifiers

Micropower Signal Processing

Battery-Powered Analog Circuits

Features

o Single- or Dual-Supply Operation: +1.6V to +36V,

±0.8V to ±18V

o True Single-Supply Operation: Input and Output

Voltage Ranges Include Ground

o 2.0µV/°C Max Offset Voltage Drift

o 20µA Max Supply Current

o 5mA Min Output Drive

o 140µV Max Input Offset Voltage

o 3nA Max Input Bias Current

o 500V/mV Min Open-Loop Gain

o Standard 741 Pinout with Nulling to V-

High-Precision, Low-Voltage,

Micropower Op Amp

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Maxim Integrated Products

1

MAX480

OUT

HP5082-2800

IN914

6

7

4

2

3

V+ (5V)

R2

10k

R1

10k

R3

100k

SINGLE OP AMP FULL-WAVE RECTIFIER

Typical Operating Circuit

19-2772; Rev 3a; 1/98

PART

MAX480CPA

MAX480CSA

0°C to +70°C

0°C to +70°C

TEMP. RANGE

PIN-PACKAGE

8 Plastic DIP

8 SO

Pin Configuration

Ordering Information

MAX480EPA

MAX480ESA

-40°C to +85°C

-40°C to +85°C

8 Plastic DIP

8 SO

MAX480MJA

-55°C to +125°C

8 CERDIP

OUT

NULL

V-

1

2

8

7

N.C.

V+

IN-

IN+

NULL

DIP/SO

TOP VIEW

3

4

6

5

MAX480