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.

4

___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600

© 1994 Maxim Integrated Products

Printed USA

is a registered trademark of Maxim Integrated Products.

Precision Operational Amplifier

OUTPUT

INPUT

20k

V-

V+

MXL1001

1

2

3

4

6

7

8

Figure 1. Optional Offset Nulling Circuit

__________Applications Information

The MXL1001 series devices are pin-compatible with the

OP-07, OP-05, 725, 108A or 101A amplifiers. The

MXL1001 amplifiers can be used to upgrade older

designs using these devices, with or without removal of

external frequency compensation or nulling components.

The MXL1001 can also be used in 741, LF156 or OP-15

applications provided the nulling circuitry is removed.

The MXL1001 is specified over a wide supply voltage

range from ±3V to ±18V. Operation with lower supplies

is possible down to ±1.2V (two NiCd batteries), howev-

er, at this level the device is stable only in closed-loop

gains of +2 and above (or inverting gain of one or high-

er). Unless proper care is exercised, thermocouple

effects caused by temperature gradients across dissimi-

lar metals at the input terminal connections, can exceed

the inherent offset-voltage drift of the amplifier. Air cur-

rents over the device leads should be minimized, pack-

age leads should be short, and the two input leads

should be as close together as possible and maintained

at the same temperature.

Offset-Voltage Adjustment

The input offset voltage of the MXL1001, and its temper-

ature drift, are minimized by zener-zap trimming at the

be performed using a 10k

Ω or 20kΩ potentiometer with

to a value other than zero creates a drift of

change in drift will be 1µV/°C. The adjustment range

with a 10k

Ω or 20kΩ potentiometer is approximately

±2.5mV. If less adjustment range is needed, the sensi-

tivity and resolution of the offset nulling can be improved

by using a potentiometer of lower ohmic value in con-

junction with fixed resistors.

___________________Chip Topography

V-

+IN

0.076"

(1.93mm)

0.102"

(2.59mm)

-IN

V+

SUBSTRATE IS CONNECTED TO V-