WS72551E-5/TR

This family of amplifiers has ultra low offset, drift, and bias current. The WS72551 and WS72552 are single and dual amplifiers featuring rail-to-rail input and output swings respectively. All are guaranteed to operate from 2.5V to 5V with a single supply. The WS72551/WS72552 provides the benefits previously found only in expensive auto-zeroing or chopper-stabilized amplifiers. These new zero-drift amplifiers combine low cost with high accuracy. No external capacitors are required. With an offset voltage of only 3μV and drift of 0.008 μV/σ, the WS72551/WS72552 are perfectly suited for applications in which error sources cannot be tolerated. Temperature, position and pressure sensors, medical equipment, and strain gauge amplifiers benefit greatly from nearly zero drift over their operating temperature range. The rail-to-rail input and output swings provided by the WS72551/WS72552 make both high-side and low-side sensing easy. The WS72551/WS72552 are specified for the extended industrial/automotive temperature range (-40°C to +125°C). The WS72551 single amplifier is available in 8-lead MSOP, 8-lead narrow SOIC and 5-lead SOT23-5L packages. The WS72552 dual amplifier is available in 8-lead MSOP and 8-lead narrow SOIC surface mount packages.

Applications

• Temperature sensors
• Pressure sensors
• Precision current sensing
• Strain gauge amplifiers
• Medical instrumentation
• Thermocouple amplifiers

Key features

• Low offset voltage: 14 μV (MAX)
• Input offset drift: 0.008 μV/°C
• Overload recovery time: 150 μs
• Low supply current: 240 μA/OpAmp
• High gain, CMRR, PSRR: 130 dB
• Ultralow input bias current: 10 pA
• No external capacitors required
• 5 V/2.5 V single-supply operation
• Rail-to-rail input and output swing