The OP400 is a low offset, low power quad operational amplifier from Analog Devices. It features low input offset voltage, low offset voltage drift, low supply current, high open-loop gain, low noise voltage density, and is pin-compatible with LM148, HA4741, RM4156, and LT1014.
The OP400 quad operational amplifier delivers OP77‑type performance in a compact quad package. It features an input offset voltage as low as 150 pV, offset drift of only 1.2 pV/°C, and a supply current of less than 725 pA per amplifier, making it ideal for low‑power, high‑precision applications. The device also offers a high open‑loop gain (minimum 5000 V/mV), low input bias current (3 nA max), and low noise voltage density (11 nV/√Hz at 1 kHz).\n\nThe OP400 is available in several package options, including 14‑lead ceramic DIP, 14‑lead plastic DIP, and 16‑lead SOIC, and is pin‑compatible with LM148, HA4741, RM4156, and LT1014. It operates over a wide temperature range (‑55 °C to +125 °C for the A grade) and can drive capacitive loads up to 10 nF without instability, making it suitable for instrumentation, sensor interfaces, and other precision analog circuits.
| Input Offset Voltage | 150 pV max |
|---|---|
| Input Offset Voltage Drift | 1.2 pV/°C max |
| Supply Current per Amplifier | 725 pA max |
| Open‑Loop Gain | ≥ 5000 V/mV |
| Input Bias Current | 3 nA max |
| Noise Voltage Density | 11 nV/√Hz at 1 kHz |
| Capacitive Load Stability | 10 nF typical |
The OP400 has an input offset voltage as low as 150 pV maximum.
Each amplifier draws less than 725 pA of supply current.
The OP400 is available in 14‑lead ceramic DIP, 14‑lead plastic DIP, and 16‑lead SOIC packages.
OP400A operates from –55 °C to +125 °C.