OPA388, OPA2388, OPA4388
SBOS777D – NOVEMBER 2016 – REVISED JULY 2020
OPAx388 Precision, Zero-Drift, Zero-Crossover, Tru...
OPA388, OPA2388, OPA4388
SBOS777D – NOVEMBER 2016 – REVISED JULY 2020
OPAx388 Precision, Zero-Drift, Zero-Crossover, True Rail-to-Rail, Input/Output Operational
Amplifiers
1 Features
Ultra-low offset
voltage: ±0.25 µV Zero drift: ±0.005 µV/°C Zero crossover: 140-dB CMRR true RRIO Low noise: 7.0 nV√Hz at 1 kHz No 1/f noise: 140 nVPP (0.1 Hz to 10 Hz) Fast settling: 2 µs (1 V to 0.01%) Gain bandwidth: 10 MHz Single supply: 2.5 V to 5.5 V Dual supply: ±1.25 V to ±2.75 V True rail-to-rail input and output EMI/RFI filtered inputs Industry-standard packages:
– Single in SOIC-8, SOT-23-5, and VSSOP-8 – Dual in SOIC-8 and VSSOP-8 – Quad in SOIC-14 and TSSOP-14
2 Applications
Merchant network and server PSU Notebook PC power adapter design Weigh scale Lab and field instrumentation Battery test Electronic thermometer Temperature transmitter
R3 25 k
R4
5V
100 k
RG
REF5025
R4 100 k
R2 25 k
5V
5V
±
+SENSE
5V
±
VOUT
OPA388
OPA388
+
R2 10 k
GND
+
GND
±SENSE
GND
GND
Load Cell
200 NŸ G=5+
RG
The OPA388 in a High-CMRR, Instrumentation
Amplifier Application
3 Description
The OPAx388 (OPA388, OPA2388, and OPA4388) series of precision operational
amplifiers are ultra-low noise, fast-settling, zero-drift, zero-crossover devices that provide rail-to-rail input and output operation. These features and excellent ac performance, combined with only 0.25 µV of offset and 0.005 µV/°C of drift over temperature, makes the OPAx388 a great ch...