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ADEMO141B

RECOMMENDED FOR NEW DESIGNS

Low-Noise Analog Integrator for use with PCB-Based di/dt Sensors

Data Sheet (Rev. SpA) Product Selection Table
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Overview

  • Single-supply operation: 2.97V to 3.63V
  • User configurable integrator gain, ADEMO141A gain at 50Hz, using different feedback capacitor
    • 397.9, CFB = 10nF
    • 265.3, CFB = 15nF
    • 180.9, CFB= 22nF
    • 102.0, CFB= 39nF
  • ADEMO141B gain at 50Hz, using different feedback capacitor
    • 49.7, CFB = 10nF
    • 33.2, CFB = 15nF
    • 22.6, CFB = 22nF
  • Low noise
    • ADEMO141A: 7.2nV√Hz at f = 45Hz to 65Hz
    • ADEMO141B: 18.8nV√Hz at f = 45Hz to 65Hz

The ADEMO141A/ADEMO141B is a low-drift, low-noise, fully-differential amplifier which can be operated as an analog integrator, for use with a PCB-based di/dt current sensor and analog-to-digital converter (ADC). It has a output common-mode voltage of 1.2V and supply voltage of 3.3V. The analog integrator amplifies signal and cancels the frequency dependance of the current sensor.

The ADEMO141A/ADEMO141B has high gain, low noise, and excellent common-mode rejection ratio (CMRR) and power-supply rejection ratio (PSRR) specifications, which makes it ideal for high accuracy energy measurement applications. The ADEMO141A/ ADEMO141B is specified over the extended industrial temperature (−40°C to +125°C), and is available in a 8-lead LFCSP.

For more details on the ADEMO141A/ADEMO141B, contact the local Analog Devices, Inc., sales office at www.analog.com/sales.

APPLICATIONS

  • Single-phase energy meters
  • Polyphase energy meters
  • Split-phase energy meters
  • Power quality monitoring
  • Protective devices
  • Smart breakers
  • EV chargers
  • Machine health
  • Smart power distribution units
ADEMO141B
Low-Noise Analog Integrator for use with PCB-Based di/dt Sensors
ADEMO141A-141B Functional Block Diagram ADEMO141A-141B Pin Configuration ADEMO141B Chip Illustration
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Documentation

Data Sheet 1

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