MANUFACTURER PART RECORDADEMA127
Analog DevicesADEMA127 is a 7-channel, 24-bit simultaneously sampling sigma-delta ADC from Analog Devices for precision three-phase four-wire energy metering, converting seven voltage and current inputs at the same instant at up to 64 kSPS with up to 105 dB SNR, with high-impedance differential inputs over a plus-minus 1.2 V peak range, a 5 ppm per °C internal voltage reference, per-channel DSP for gain, phase, and offset compensation, an integrated digital integrator and second-order high-pass filter for Rogowski coils, sinc compensation with low-pass filtering and decimate-by-2 that extends usable analog bandwidth by up to 70 percent, and a 4-wire SPI interface with bidirectional CRC and daisy-chain support in a 32-lead 5 mm x 5 mm LFCSP. Simultaneous sampling is the selection point: all channels are captured at the same instant, so active and reactive energy stay accurate across phases without the skew error of multiplexed converters, and the on-chip DSP removes the external calibration and compensation parts that older metering front ends needed. The business gain is a faster, cheaper meter design: one ADC covers three phases, neutral, and a tamper channel, preloaded DSP filter coefficients shorten firmware work, 0.5 ms fast start-up suits breakers and protection relays, and tamper-detect mode with low-power battery backup protects revenue metering, at only 18 mW with all seven channels active. Evidence: the Analog Devices ADEMA124/ADEMA127 data sheet Rev. A defines this device with its 7-channel configuration, 105 dB SNR, and -40 °C to +125 °C operating range, and Analog Devices lists ADEMA127 as recommended for new designs; the orderable form is ADEMA127ACPZ in a 32-lead LFCSP. Selection advice: choose ADEMA127 over ADEMA124 when the meter needs three-phase four-wire measurement with neutral current plus an auxiliary or tamper channel in one device; drop to ADEMA124 when four channels cover the design; the same device works with current transformers, shunts, voltage dividers, or Rogowski coils, and it daisy-chains with ADE9112 and ADE9113 isolated ADCs for isolated channels. Featured in DigiKey Q2 2026 new product introductions. Parameters verified against Analog Devices documentation. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.
Analog ICsAnalog-to-digital converterLFCSP-32