描述
The LTC8594 of quad-channel amplifiers provides input offset voltage correction for verylow 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 designbreakthrough allows the combination of a GBWP of 1.5 MHz and a high SR of 1.2 V/μs,while only drawing 125 μA supply current. These devices are unity gain stable and have good Power Supply Rejection Ratio (PSRR) and Common Mode Rejection Ratio (CMRR).
The LTC8594 amplifiers are perfectly suited for applications that require precisionamplification of low level signals, in which error sources cannot be tolerated, even inwhich high bandwidth and fast transition are needed. The rail-to-rail input and outputswings make both high-side and low-side sensing easy. The LTC8594 can operate with asingle supply voltage as low as 1.8 V for 2-cell battery applications.
The LTC8594 op-amps have enhanced EMI protection to minimize any electromagnetic
interference from external sources, and have high electro-static discharge (ESD)
protection (5-kV HBM). All models are specified over the extended industrial temperaturerange of −40 ℃ to +125 ℃.
优势和特点
High DC Precision:
– ±40 μV (maximum) VOS with a Drift of ±50 nV/℃ (maximum)
– AVOL: 112 dB (minimum, VDD = 5.5V)
– PSRR: 112 dB (minimum, VDD = 5.5V)
– CMRR: 112 dB (minimum, VDD = 5.5V)
– Vn : 0.45 μVPP (typical, f = 0.1 to 10 Hz)
1.5 MHz Bandwidth and 1.2 V/μs Slew Rate
Settling Time to 0.1% with 1V Step: 1.2 μs
Overload Recovery Time to 0.1%: 35 μs
Micro-Power 125 μA per Amplifier and 1.8 V to 5.5 V Wide Supply Voltage Range
Operating Temperature Range: −40℃ to +125℃
应用
Precision current sensing
Resistor thermal detectors
Temperature, position and pressure sensors
Medical equipment
Electronic scales
Strain gage amplifiers
Thermocouple amplifiers
