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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.
6 simultaneously sampling differential inputs
Programmable data rate up to 32kSPS
Programmable gain up to 128
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