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Digital Potentiometer IC

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Description
ADS131M06 6-Channel Delta-Sigma Analog-to-Digital Converter (ADC) is a six-channel, simultaneously-sampling, 24-bit, delta-sigma (ΔΣ) ADC. It offers a wide dynamic range, low-power, and energy-measurement-specific features, making the device an excellent fit for energy metering, power metrology, and circuit breaker applications. The ADC inputs can be directly interfaced to a resistor-divider network or a power transformer to measure voltage or to a current transformer or a Rogowski coil to measure current. The individual ADC channels can be independently configured, depending on the sensor input. A low-noise, programmable gain amplifier (PGA) provides gains ranging from 1 to 128 to amplify low-level signals. The Texas Instruments ADS131M06 integrates channel-to-channel phase calibration and offset and gain calibration registers to help remove signal-chain errors. A low-drift, 1.2V reference is integrated into the device, reducing the printed circuit board (PCB) area. Cyclic redundancy check (CRC) options can be individually enabled on the data input, data output, and register map to ensure communication integrity.

FEATURES

  • 6 simultaneously sampling differential inputs
  • Programmable data rate up to 32kSPS
  • Programmable gain up to 128
  • Noise performance
    • 102dB dynamic range at gain = 1, 4kSPS
    • 80dB dynamic range at gain = 64, 4kSPS
  • Total harmonic distortion: –100dB
  • High-impedance inputs for direct sensor connection
    • 330kΩ input impedance for gains of 1, 2, and 4
    • 1MΩ input impedance for gains of 8, 16, 32, and 64
  • Programmable channel-to-channel phase delay calibration
    • 244ns resolution, 8.192MHz fCLKIN
  • Current-detect mode allows for extremely low power tamper detection
  • First data within 0.5ms of supply ramp provides fast startup
  • Integrated negative charge pump allows input signals below ground
  • –120dB crosstalk between channels
  • A low-drift internal voltage reference
  • Cyclic redundancy check (CRC) on communications and register map
  • 2.7V to 3.6V analog and digital supplies
  • 5.0mW at 3V AVDD and DVDD low power consumption
  • 32-pin TQFP package
  • –40°C to +125°C operating temperature range

APPLICATIONS

  • Commercial and residential electricity meters
  • Circuit breakers
  • Battery test equipment
  • Battery management systems