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Current Sense Amplifier

TP5531 - 1.8V, 34μA, RRIO, Zero Drift Single Op-amps



 ZERO DRIFT: 0.008 μV/℃

 0.1Hz to 10Hz Noise: 1.1 μVPP

 Low Supply Current: 34μA per Amplifier

 Bandwidth: 350 kHz

 Slew Rate: 0.16 V/μs

 High Gain, 130 dB High CMRR and PSRR

 Rail-to-rail Input and Output Swing

 –40°C to 125°C Operation Range

 Small Packages: SC70 and SOT23

Typical Application

The TP553x in Bi-Directional Current Sense Amplifier Applications


The 3PEAK TP5531/2/4 low-power chopper stabilized operational amplifiers provide input offset voltage correction for very low offset and offset drift over time and temperature. The devices operate with a single supply voltage as low as 1.8V, while drawing 34μA per amplifier of quiescent current with a gain bandwidth product of 350kHz. They are unity gain stable, have no 1/f noise, have good Power Supply Rejection Ratio (PSRR) and Common Mode Rejection Ratio (CMRR), and feature rail-to-rail input and output swing.

The devices were designed using an advanced CMOS process. The TP5531 (single version) is available in SC70-5, SOT23-5 and SO-8 packages. The TP5532 (dual version) is offered in MSOP-8 and SO-8 package. The TP5534 (quad version) is available in TSSOP-14 and SOIC-14 package. All versions are specified for operation from -40°C to 125°C.


 Transducer Amplifier

 Bidirectional Current Sense

 DC Offset Correction

 Temperature Measurement

 Remote Located Sensors

 Battery-Powered Instruments

 Electronic Weigh Scales