The AT8551 is an upgraded drop-in replacement for the AD8551, providing 1µV typical (5µV maximum) input offset with 0.005µV/°C drift through auto-zero techniques. It offers a 4.5MHz gain-bandwidth and 2.7V/µs slew rate — substantially higher than the AD8551 — while maintaining ultralow noise of 0.75µVP-P.
The AT8551 features rail-to-rail input and output swing with a single-supply operating range of +2.7V to +5.5V, and does not require external capacitors. It is well suited for precision current sensing, weigh scales, temperature and pressure sensor amplification, and handheld test equipment.
Specifications
Supply Voltage
2.7V to 5.5V
Gain Bandwidth (GBW)
4.5MHz
Input Offset Voltage
1µV (Typ), 5µV (Max)
Input Offset Drift
0.005µV/°C (Max)
Slew Rate
2.7V/µs
Input Voltage Noise
0.75µVP-P (0.01Hz to 10Hz)
Quiescent Current
640µA/Op Amp
Gain, CMRR & PSRR
≥130dB
Input/Output
Rail-to-Rail I/O
Package
SOT23-5, MSOP-8, SOIC-8
Operating Temperature
−40°C to +125°C
Weight
0.3 lbs
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