Texas Instruments expanded its 1.8-V precision operational amplifier portfolio

Texas Instruments expanded its 1.8-V precision operational amplifier portfolio with a new line of op amps for low-noise, high-impedance sensor measurement. The first product in the OPAx320 family, the two-channel OPA2320, provides 20 MHz of gain bandwidth and 0.2 pA input bias current (Ib) to enable very high accuracy and dynamic range for high-impedance optical and chemical sensor front ends, programmable logic controllers, motor control loops, and test and measurement equipment

Description

The OPA320 (single) and OPA2320 (dual) are a new generation of precision, low-voltage CMOS operational amplifiers optimized for very low noise and wide bandwidth while operating on a low quiescent current of only 1.45mA.

The OPA320 series is ideal for low-power, single-supply applications. Low-noise (7nV/√Hz) and high-speed operation also make them well-suited for driving sampling analog-to-digital converters (ADCs). Other applications include signal conditioning and sensor amplification.

The OPA320 features a linear input stage with zero-crossover distortion that delivers excellent common-mode rejection ratio (CMRR) of typically 114dB over the full input range. The input common-mode range extends 100mV beyond the negative and positive supply rails.

Device Uses

• High-Z Sensor Signal Conditioning
• Transimpedance Amplifiers
• Test and Measurement Equipment
• Programmable Logic Controllers (PLCs)
• Motor Control Loops
• Communications
• Input/Output ADC/DAC Buffers
• Active Filters

Features

• Precision with Zero-Crossover Distortion:
  • Low Offset Voltage: 150µV (max)
  • High CMRR: 114dB
  • Rail-to-Rail I/O
• Low Input Bias Current: 0.9pA (max)
• Low Noise: 7nV/√Hz at 10kHz
• Wide Bandwidth: 20MHz
• Slew Rate: 10V/µs
• Quiescent Current: 1.45mA/ch
• Single-Supply Voltage Range: 1.8V to 5.5V
• OPA320S, OPA2320S:
  • I_Q in Shutdown Mode: 0.1µA
• Unity-Gain Stable
• Small Packages:
  • SOT23, MSOP, DFN

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