Description:

The GD30AP855x family of amplifiers provides inputoffset voltage correction for very low offset and driftthrough the use of patented fast step response chopperstabilized techniques. This method constantly measuresand compensates the input offset, eliminating drift overtime andtemperature and the effect of 1/f noise. This designbreakthrough allows the combination of a gainbandwidth product of 1.5MHz and a high slew rate of1.2V/μs, while only drawing 125μA supply current.These devices are unity gain stable and have goodPower Supply Rejection Ratio (PSRR) and CommonMode Rejection Ratio (CMRR).The GD30AP855x series are perfectly suited forapplications that require precision amplification of lowlevel signals, in which error sources cannot be tolerated,even in which high bandwidth and fast transition areneeded. The rail-to-rail input and output swings makeboth high-side and low-side sensing easy. TheGD30AP855x series can operate with a single supplyvoltage as low as 1.8V for 2-cell battery applications.The GD30AP855x op-amps have enhanced EMIprotection to minimize any electromagnetic interferencefrom external sources, and have high electro-staticdischarge (ESD) protection (5-kV HBM). All models arespecified over the extended industrial temperature rangeof −40°C to +125°C.

Features:

• High DC Precision:

– 8μV (maximum) VOS with a Drift of ±40nV/°C(maximum)

– AVOL: 112dB (minimum, VDD = 5.5V)

– PSRR: 112dB (minimum, VDD = 5.5V)

– CMRR: 112dB (minimum, VDD = 5.5V)

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

• 1.5MHz Bandwidth and 1.2V/μs Slew Rate

• Settling Time to 0.1% with 1V Step: 1.2μs

• Overload Recovery Time to 0.1%: 35μs

• Micro-Power 125μA per Amplifier and 1.8V to5.5V Wide Supply Voltage Range

• Operating Temperature Range: −40°C to+125°C

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