The document describes the features and characteristics of the Quad Low Offset, Low Power Operational Amplifier OP400 Rev. E, including low input offset voltage, low offset voltage drift over –55°C to +125°C, low supply current, high open-loop gain, input bias current, low noise voltage density, etc. The product is pin-compatible with LM148, HA4741, RM4156, and LT1014, with improved performance.
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 1.2 pV/°C, a supply current of only 725 pA per amplifier, and a high open‑loop gain of at least 5000 V/mV. Low input bias current (3 nA) and low noise voltage density (11 nV/√Hz at 1 kHz) make it suitable for precision instrumentation.
The document provides detailed electrical characteristics, absolute maximum ratings, thermal resistance data, typical performance graphs, and an ordering guide with package options and SMD equivalents. It also lists pin‑compatible devices such as LM148, HA4741, RM4156, and LT1014.
| Input Offset Voltage | 150 pV max |
|---|---|
| Input Bias Current | 3 nA max |
| Supply Current per Amplifier | 725 pA max |
| Open‑Loop Gain | ≥ 5000 V/mV |
| Noise Voltage Density | 11 nV/√Hz at 1 kHz |
The OP400A operates from –55 °C to +125 °C; other grades cover –25 °C to +85 °C, 0 °C to +70 °C, or –40 °C to +85 °C as listed in the absolute maximum ratings.
The OP400 is pin‑compatible with LM148, HA4741, RM4156, and LT1014.
Each amplifier draws less than 725 pA of supply current.
The input offset voltage drift is up to 1.2 pV/°C over –55 °C to +125 °C.