OP400 Quad Low-Offset Low-Power Op-Amp

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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.

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Operational Amplifier

An operational amplifier or op-amp is simply an electronic linear Integrated Circuit or IC that has multiple terminals. An op-amp is a voltage amplifying device that is meant to be work with external feedback components such as resistors and capacitors. Operational amplifiers are considered to be one of the most vastly used electronic component, with applications ranging from small scale consumer electronic components such as smartphones, tablets, PCs, to large scale industrial instrumentation tools such as poisonous gas sensors and transducers for impurity detection. There are two main classifications of op – amps:

Inverting op-amp
Non – inverting op-amp

OP400 Pinout

OP400 Pin Configuration

Pin No	Pin Name	Description
1	OUT A	Output Of Amplifier A
2	INV-INPUT A	Inverting Input Of Amplifier A
3	NON-INV-INPUT A	Non Inverting Input Of Amplifier A
4	V+	Positive Power Supply
5	NON-INV-INPUT B	Non Inverting Input Of Amplifier B
6	INV-INPUT B	Inverting Input Of Amplifier B
7	OUT B	Output Of Amplifier B
8	OUT C	Output Of Amplifier C
9	INV-INPUT C	Inverting Input Of Amplifier C
10	NON-INV-INPUT C	Non Inverting Input Of Amplifier C
11	V-	Negative Power Supply
12	NON-INV-INPUT D	Non Inverting Input Of Amplifier D
13	INV-INPUT D	Inverting Input Of Amplifier D
14	OUT D	Output Of Amplifier D

OP400 Features

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
Low Input Offset Voltage 150 V Max

Application

Dual Low-Power Instrumentation Amplifier

A dual instrumentation amplifier that consumes less than 33 mW of power per channel is shown in Figure 1. The linearity of the instrumentation amplifier exceeds 16 bits in gains of 5 to 200 and is better than 14 bits in gains from 200 to 1000. CMRR is above 115 dB (G = 1000). Offset voltage drift is typically 0.4 mV/∞C over the military temperature range which is comparable to the best monolithic instrumentation amplifiers