OPA397DBVR

The OPAx397 series op amps feature ultra-low offset voltage, temperature drift, and input bias current, providing rail-to-rail input and output operation. In addition to precision DC accuracy, the AC performance is optimized for low noise and fast-settling transient response. These characteristics make the OPAx397 an ideal choice for driving high-precision ADCs or buffering high-resolution DAC outputs. The OPAx397 employs e-trim™ op amp technology to achieve ultra-low offset voltage and offset voltage temperature drift without any input chopping or auto-zero techniques. This technology enables ultra-low input bias current for sensor inputs or photodiode current-to-voltage measurements, enabling high-performance transimpedance stages for optical modules or medical instrumentation. The OPAx397 is a family of low offset voltage, low-noise e-trim op amps utilizing a proprietary offset voltage trimming technology. These op amps provide ultra-low input offset voltage and drift, delivering excellent input and output dynamic linearity performance. The OPAx397 operates from 1.7V to 5.5V, is unity-gain stable, and is designed for a wide range of general-purpose and precision applications. These amplifiers leverage advanced CMOS technology and sophisticated design features to achieve extremely low input bias current, wide input and output voltage range, high loop gain, and low, flat output impedance in compact package options. Additional advantages of the OPAx397 include 13MHz bandwidth, 4.4nV/√Hz noise spectral density, and low 1/f noise. These characteristics make the OPAx397 an ideal choice for interfacing with sensors, photodiodes, and high-performance ADCs.

Applications

• Multi-parameter patient monitors
• ECG
• Chemical/gas analyzers
• Optical modules
• Analog input modules
• Process analysis (pH, gas, concentration, force, and humidity)
• Gas detectors
• Analog security cameras
• Commercial DC/DC
• Pulse oximeters
• Data center interconnects (long-reach, underwater)
• DAQ

Key features

• Low offset voltage: ±60μV (max)
• Low temperature drift: ±0.18μV/°C
• Low input bias current: 10fA
• Low noise: 4.4nV/√Hz at 10kHz
• Low 1/f noise: 2μVPP (0.1Hz to 10Hz)
• Low supply voltage operation: 1.7V to 5.5V
• Low quiescent current: 1.22mA
• Fast settling: 0.75µs (1V, 0.1%)
• Fast slew rate: 4.5V/µs
• High output current: +65/-55mA
• Unity-gain bandwidth: 13MHz
• Rail-to-rail input and output
• Rated temperature range: -40°C to +125°C
• EMI/RFI filtered inputs