31 August 2023

CISSOID at The Battery Show North America in Novi, Michigan, on 12-14 Sept 2023.

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Dual Precision Operational amplifier (225C)

CHT-OPAL is an ultra high-precision, dual operational amplifier designed for applications that require very low offset and very low noise. Key features include single 5V nominal power supply and rail-to-rail inputs and outputs. Best-in-class precision on the full temperature range -55°C to +225°C encompasses low input offset (internally compensated) and low noise. The internal circuitry uses a clock that is internally generated. There is a spread-spectrum mode for this clock.

Typical performances

  • Temperature range: -55°C to 225°C
  • Single supply operation: 5V ±10%
  • Rail-2-rail input and output 
  • Quiescent current: 1.2 mA typ.
  • Low bias input current: <10 pA typ 
  • Input offset: 50µV typ, 100 µV max
  • Low noise: 5 µVpp typ
  • High CMRR: 85 dB min
  • Slew rate: 2.7 V/µs typ
  • Offset compensation modes: 
    • Internal clock w/ or w/o spread spectrum
    • External clock 12kHz to 500 kHz
  • Stand-by mode with 7µA max current
  • Package: TDFP16 (5x5.5mm)



  • High temperature instrumentation & data acquisition
  • Signal conditioning & instrumentation amplifiers for temperature, pressure, motion, speed and position sensors
  • Strain gage amplifiers
  • Photodiode and PMT amplifiers
  • Charge amplifiers
  • Current sensing
  • Transmitters (4-20mA, etc.)

If you need support for your high temperature design, contact Cissoid.

Download CISSOID's Altium Library for IC symbols and package footprints. For installation, read the related Application Note.


Die Map

Supporting its customers in the manufacturing of high temperature and high reliability hybrid modules, CISSOID delivers most of its CHT products as bare die. Please, do not hesitate to contact CISSOID to request die map information including die dimension, die finish, location and description of the bonding pads.


Ordering information

Product name Ordering reference Package Marking
OPAL CHT-GEM648901-D-U Potential Good Die -