PSA3001
Zero-drift op-amp with 1μV offset, chopper-stabilized architecture for ultra-precision DC applications
Product Overview
Description
The PSA3001 is a zero-drift precision operational amplifier using chopper-stabilized architecture to achieve ultra-low offset voltage.
With 1μV maximum offset and 0.01μV/°C drift, this amplifier is ideal for high-precision DC measurement, strain gauges, and thermocouple interfaces.
The device features rail-to-rail input and output, 2MHz bandwidth, and excellent EMI rejection for industrial environments.
Product Series
PSA
Primary Application
Precision weigh scales
Key Features
- Ultra-low offset: 1μV max
- Near-zero drift: 0.01μV/°C
- Chopper-stabilized architecture
- Rail-to-rail input and output
- High CMRR: 130dB
- Excellent EMI rejection
- No 1/f noise
- Low power consumption
Specifications
| Offset Voltage | 1uV max |
|---|---|
| Offset Drift | 0.01uV/°C |
| Input Bias Current | 200pA typical |
| Noise Density | 25nV/√Hz @ 1kHz |
| Bandwidth | 2MHz |
| Slew Rate | 1.2V/us |
| CMRR | 130dB |
| PSRR | 120dB |
| Supply Voltage | 2.2V - 5.5V single, ±1.1V - ±2.75V dual |
| Temperature Range | -40°C to +85°C (Industrial), -40°C to +125°C (Automotive) |
| Package | SOT-23-5, SOIC-8, MSOP-8 |
Applications
Precision weigh scales
Electronic system design
Thermocouple amplifiers
Electronic system design
Strain gauge interfaces
Communication and interface
Current sensing
Electronic system design
Medical instrumentation
Medical electronics
Test and measurement
Data acquisition and conversion
FAE Expert Insights
"The PSA3001 is my top recommendation for ultra-precision DC applications. The chopper-stabilized architecture eliminates 1/f noise and achieves near-zero offset drift. I've used this amplifier in precision weigh scales where the 1μV offset and 0.01μV/°C drift ensure accurate measurements across temperature. The lack of 1/f noise makes it ideal for low-frequency signals like thermocouples. The 130dB CMRR provides excellent rejection of common-mode interference. For best performance, I recommend placing filtering capacitors close to the supply pins and using a solid ground plane. Note that chopper amplifiers have clock feedthrough that may need filtering in sensitive applications."
1μV offset with near-zero drift for ultra-precision DC applications
— Lisa Chen, BeiLuo