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OPA320, OPA2...
Product Folder
Sample & Buy
Technical Documents
Tools & Software
Support & Community
Reference Design
OPA320, OPA2320, OPA320S, OPA2320S
SBOS513F – AUGUST 2010 – REVISED DECEMBER 2016
OPAx320x Precision, 20-MHz, 0.9-pA, Low-Noise, RRIO,
CMOS Operational Amplifier With Shutdown
1 Features
1 Precision with Zero-Crossover Distortion: – Low Offset
Voltage: 150 µV (Maximum) – High CMRR: 114 dB – Rail-to-Rail I/O
Low Input Bias Current: 0.9 pA (Maximum) Low Noise: 7 nV/√Hz at 10 kHz Wide Bandwidth: 20 MHz Slew Rate: 10 V/µs Quiescent Current: 1.45 mA/Ch Single-Supply
Voltage Range: 1.8 V to 5.5 V OPA320S and OPA2320S:
– IQ in Shutdown Mode: 0.1 µA Unity-Gain Stable Small Packages:
– SOT-23, VSSOP, SON, and SOIC
2 Applications
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
Block Diagram
V+
Low Noise Charge Pump
Bias Circuitry
+IN -IN
OUT
3 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 1.45 mA.
The OPA320 series is ideal for low-power, singlesupply applications. Low-noise (7 nV/√Hz) and highspeed operation also make them well-suited for driving sampling analog-to-digital converters (ADCs). Other applications...