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Rainbow Electronics MAX4074_MAX4078 User Manual

General description, Applications, Features

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General Description

The MAX4074–MAX4078 GainAmp™ op amp family
combines low-cost Rail-to-Rail

®

op amps with precision

internal gain-setting resistors. Factory-trimmed on-chip
resistors decrease design size, cost, and layout, and
provide 0.1% gain accuracy. Fixed inverting gains from
-0.25V/V to -100V/V or noninverting gains from +1.25V/V
to +101V/V are available. These devices operate from a
single +2.5V to +5.5V supply and consume just 34µA.
GainAmp amplifiers are optimally compensated for each
gain version, achieving gain bandwidth (GBW) products
up to 4MHz (A

V

= +25V/V to +101V/V). High-voltage

fault protection withstands ±17V at either input without
damage or excessive current draw (MAX4074/MAX4075
only).

Two versions are available in this amplifier family. The
MAX4076/MAX4077/MAX4078 are single/dual/quad
open-loop, unity-gain-stable op amps, and the
MAX4074/MAX4075 are single/dual fixed-gain op
amps. The input common-mode voltage range of the
open-loop amplifiers extends from 150mV below the
negative supply to within 1.2V of the positive supply.
The GainAmp outputs can swing rail-to-rail and drive a
1k

Ω load while maintaining excellent DC accuracy

(MAX4074/MAX4075 only). The amplifiers are stable for
capacitive loads up to 100pF.

For space-critical applications, the MAX4074/MAX4076
are available in space-saving SOT23-5 packages.

Applications

Portable Battery-Powered Equipment

Instruments, Terminals, and Bar-Code Readers

Keyless Entry

Photodiode Preamps

Smart-Card Readers

Infrared Receivers for Remote Controls

Low-Side Current-Sense Amplifiers

Features

Internal Gain-Setting Resistors in SOT23

Packages (MAX4074)

0.1% Gain Accuracy (R

F

/R

G

) (MAX4074/75)

54 Standard Gains Available (MAX4074/75)
Open-Loop, Unity-Gain-Stable Op Amps

(MAX4076/77/78)

Rail-to-Rail Outputs Drive 1kLoad (MAX4074/75)
+2.5V to +5.5V Single Supply
34µA Supply Current (MAX4074/75)
Up to 4MHz GBW Product
Fault-Protected Inputs Withstand ±17V

(MAX4074/75)

200pA max Input Bias Current (MAX4076/77/78)
Stable with Capacitive Loads up to 100pF

with No Isolation Resistor

MAX4074–MAX4078

Micropower, SOT23, Rail-to-Rail,

Fixed-Gain, GainAmp/Open-Loop Op Amps

________________________________________________________________ Maxim Integrated Products

1

TOP VIEW

MAX4074

5

4

1

2

3

IN-

OUT

V

CC

V

EE

R

G

R

F

IN+

SOT23-5

19-1526; Rev 1; 10/99

Pin Configurations/

Functional Diagrams

Patent pending.

GainAmp is a trademark of Maxim Integrated Products.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

Ordering Information

Pin Configurations continued at end of data sheet.

Ordering Information continued at end of data sheet.

Note: Insert the desired gain code in the blank to complete the
part number (see the Gain Selector Guide).
**See the Gain Selector Guide for a list of preferred gains and
top marks.

8 SO

5 SOT23-5

PIN-

PACKAGE

TEMP. RANGE

-40°C to +70°C

-40°C to +70°C

MAX4074__ESA

MAX4074__EUK-T

PART

**

TOP

MARK

Typical Operating Circuit appears at end of data sheet.

Gain Selector Guide appears at end of data sheet.