a

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OP400

Quad Low-Offset, Low-Power

Operational Amplifier

REV. A

FEATURES

Low Input Offset Voltage 150

V Max

Low Offset Voltage Drift, Over –55 C to +125 C

1.2 pV/ C Max

Low Supply Current (Per Amplifier) 725

A Max

High Open-Loop Gain 5000 V/mV Min

Input Bias Current 3 nA Max

Low Noise Voltage Density 11 nV/

÷Hz at 1 kHz

Stable With Large Capacitive Loads 10 nF Typ

Pin Compatible to LM148, HA4741, RM4156, and LT1014

with Improved Performance

Available in Die Form

PIN CONNECTIONS

GENERAL DESCRIPTION

The OP400 is the first monolithic quad operational amplifier

that features OP77 type performance. Precision performance no

longer has to be sacrificed to obtain the space and cost savings

offered by quad amplifiers.

The OP400 features an extremely low input offset voltage of

less than 150

mV with a drift of under 1.2 mV/∞C, guaranteed

over the full military temperature range. Open-loop gain of the

OP400 is over 5,000,000 into a 10 k

W load, input bias current is

under 3 nA, CMR is above 120 dB, and PSRR is below 1.8

mV/V.

On-chip zener-zap trimming is used to achieve the low input

offset voltage of the OP400 and eliminates the need for offset

nulling. The OP400 conforms to the industry-standard quad

pinout which does not have null terminals.

The OP400 features low power consumption, drawing less than

725

mA per amplifier. The total current drawn by this quad

amplifier is less than that of a single OP07, yet the OP400 offers

significant improvements over this industry standard op amp.

Voltage noise density of the OP400 is a low 11 nV/

which is half that of most competitive devices.

The OP400 is pin-compatible with the LM148, HA4741,

RM4156, and LT1014 operational amplifiers and can be used

to upgrade systems using these devices. The OP400 is an ideal

choice for applications requiring multiple precision operational

amplifiers and where low power consumption is critical.

14-PIN HERMETIC DIP

(Y-Suffix)

14-PIN PLASTIC DIP

(P-Suffix)

16-PIN SOL

(S-Suffix)

Figure 1. Simplified Schematic (One of Four Amplifiers is Shown)