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零漂移運算放大器

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LTC8551

規格型號:LTC8551

封裝:SOT23-5, SC70-5

功能描述:零漂移放大器

詳細介紹

Precision Zero-Drift, 1.5MHz 100μA, RRIO Operational Amplifiers

 

General Description 

The LTC855x family of amplifiers provides input offset voltage correction for very low offset and drift through the use of patented fast step response chopper stabilized techniques. This method constantly measures and compensates the input offset, eliminating drift over time and temperature and the effect of 1/f noise. This design breakthrough allows the combination of a gain bandwidth product of 1.5MHz and a high slew rate of 1V/μs, while only drawing 100μA supply current. These devices are unity gain stable and have good Power Supply Rejection Ratio (PSRR) and Common Mode Rejection Ratio (CMRR).

 

The LTC855x series are perfectly suited for applications that require precision amplification of low level signals, in which error sources cannot be tolerated, even in which high bandwidth and fast transition are needed. The rail-to-rail input and output swings make both high-side and low-side sensing easy. The LTC855x series can operate with a single supply voltage as low as 2.0V for 2-cell battery applications with 80μA per amplifier of quiescent current.

 

The LTC855x op-amps have enhanced EMI protection to minimize any electromagnetic interference from external sources. All models are specified over the extended industrial temperature range of −40℃ to +125℃.

 

Features and Benefits 

High DC Precision:

 ±10 μV (maximum) VOS with a Drift of ±50 nV/℃ (maximum, VDD = 5.5V)

 AVOL: 126 dB (minimum, VDD = 5.5V)

 PSRR: 120 dB (minimum, VDD = 5.5V) 

 CMRR: 118 dB (minimum, VDD = 5.5V)

 Vn: 0.45 μVPP (typical, f = 0.1 to 10 Hz)

1.5 MHz Wide Bandwidth and 1 V/μs High Slew Rate

Settling Time to 0.1% with 2V Step: 4 μs

Overload Recovery Time to 0.1%: 5 μs

100 μA per Amplifier Low Power and 2.0 V to 6.0 V Wide Supply Voltage Range

Operating Temperature Range: −40℃ to +125℃

 

Applications 

Precision current sensing

Resistor thermal detectors

Temperature, position and pressure sensors

Medical equipment

Electronic scales

Strain gage amplifiers

Thermocouple amplifiers

Driving A/D Converters

 


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