OPA4187IRUMR

The OPAx187 series op amps use auto-zero technology to simultaneously provide low offset voltage (1µV) and near-zero drift over time and temperature. These miniature, high-precision, low quiescent current amplifiers offer high input impedance and rail-to-rail output with swing within 5mV of the supply rails when driving high-impedance loads. The input common-mode range includes the negative supply rail. Single or dual supply operation is supported over a range of 4.5V to 36V (±2.25V to ±18V). The single-channel version of the OPAx187 is available in a miniature 8-pin VSSOP package, 5-pin SOT-23 package, and 8-pin SOIC package. The dual-channel version is available in 8-pin VSSOP and 8-pin SOIC packages. The quad-channel version is available in 14-pin SOIC, 14-pin TSSOP, and 16-pin WQFN packages. All versions are rated for an operating temperature range of -40°C to +125°C. The OPAx187 features high-precision low-side current sensing G = 1000·R_SHUNT·I

Applications

• Bridge amplifiers
• Strain gauges
• Test and measurement instruments
• Inverter applications
• Temperature measurement
• Electronic scales
• Medical instrumentation
• RTD amplifiers
• Precision active filters
• Low-side current monitoring

Key features

• Low offset voltage: 10µV (typical)
• Zero drift: 0.001µV/°C
• Low noise: 15nV/√Hz
• Power supply rejection ratio (PSRR): 160dB
• Common-mode rejection ratio (CMRR): 140dB
• AOL: 160dB
• Quiescent current: 100µA
• Wide supply voltage: ±2.25V to ±18V
• Rail-to-rail output operation, input includes negative supply rail
• Low bias current: 100pA (typical)
• EMI-filtered inputs
• Miniature package