ADEMA124ACPZ

ADEMA124ACPZ is a simultaneously sampling 4-channel ΣΔ ADC with SPI ideal for use in polyphase or split-phase energy metering applications. The ADEMA124 is compatible with voltage dividers, shunts, and isolated current sensors such as current transformers and Rogowski coils. The ADEMA124 includes independent hardware and DSP filters enabling gain, phase and offset compensation on each ADC channel. The ADEMA124 also has bespoke compensation and DSP features, which include an integrator and second-order high-pass filter to allow streamlined Rogowski sensor implementations. DSP filter coefficients for typical use cases are automatically loaded and are accessible for customization of filter characteristics. The ADEMA124 can be used in circuit breakers and protection relays, particularly with a Rogowski sensor due to a 0.5ms fast start-up time.

• SNR up to 105dB, programmable sample rate of up to 64kSPS
• Wide input-voltage range: ±1.2VPK, 848mVRMS full-scale
• Internal voltage reference temperature coefficient: 5ppm/°C typical
• Tamper detect mode, low power for battery back-up
• 4-wire SPI with bidirectional CRC and daisy-chain functionality
• Simple synchronization of multiple ADC devices
• Gain, phase, and offset compensation for each channel
• Unique SPI readable part ID registers
• Only 18mW power consumption with 7-channel ADC
• Wide temperature range from -40°C to +125°C, available in 32-lead [LFCSP] package