描述
The LTA27 44-V precision operational amplifier combines the low offset and drift of the LTA77/
OP77/OP07 with both high speed and low noise. The LTA27 offers outstanding dc precision and ac
performance, including 25 μV ultralow offset, 0.2 μV/°C maximum drift over temperature, 0.32 μVP-P
input voltage noise, 4.5 MHz gain bandwidth product and 3 V/μs slew rate. External offset nulling is
not required in the majority of circuits.
A CMRR of 114 dB minimum and PSRR of 10 μV/V (100 dB) maximum virtually eliminate errors
caused by common-mode signals and power supply drifts. This combination of outstanding
characteristics makes the LTA27 ideally suited for high resolution instrumentation and other tight
error budget systems.
The robust design of the LTA27 provides ease-of-use to the circuit designer: integrated RF/EMI
rejection filter, no phase reversal in overdrive conditions, and high electro-static discharge (ESD)
protection. The LTA27 is optimized for operation at voltages from +8 V (±4 V) to +44 V (±22 V) over
the extended temperature range of −40 °C to +125 °C.
优势和特点
- Offset Voltage: 25 μV Maximum (LTA27A)
- Offset Voltage Drift: 0.2 μV/°C Maximum (LTA27A)
- 0.1 to 10 Hz Noise: 0.32 μVP-P
- High Common-Mode Rejection: 126 dB
- Wide Supply: ±4 V to ±22 V, 8 V to 44 V
- Wide Bandwidth: 4.5 MHz
- High Slew Rate: 3 V/μs
- Low Quiescent Current: 0.7 mA per Amplifier
- EMI/RFI Filtered Inputs
应用
- Replaces OP27 Series with Improved Performance
- Multiplexed Data-Acquisition Systems
- High-Resolution ADC Driver Amplifiers
- SAR ADC Reference Buffers
- High-Side and Low-Side Current Sensing
- Test and Measurement Equipment
- Programmable Logic Controllers
- High Precision Comparator
