TI ADS131M06IRSNR

The ADS131M06 is a six-channel, synchronous-sampling, 24-bit, Δ-Σ ADC with wide dynamic range, low power consumption, and energy metering-specific features, making it well-suited for energy metering, power measurement, and circuit breaker applications. The ADC inputs can be connected directly to resistor divider networks or power transformers for voltage measurement, or to current transformers or Rogowski coils for current measurement. Individual ADC channels can be independently configured for their sensor inputs. A low-noise, programmable gain amplifier (PGA) provides gains from 1 to 128 to amplify low-level signals. In addition, the device integrates inter-channel phase calibration, offset, and gain calibration registers to help eliminate signal chain errors. The device integrates a low-drift, 1.2V reference to reduce PCB area. Optional CRC on data input, data output, and register maps ensures communication integrity. The complete AFE is available in a 32-pin TQFP package or a leadless 32-pin WQFN package, rated for an industrial temperature range of –40°C to +125°C.

• 6 synchronous sampling differential inputs
• Programmable data rate up to 32kSPS
• Programmable gain up to 128
• Dynamic range: 102dB at gain = 1, 4kSPS; 80dB at gain = 64, 4kSPS
• Total harmonic distortion: -100dB
• High-impedance inputs for direct sensor connection: 330kΩ at gain = 1, 2, and 4; ≥ 1MΩ at gain = 8, 16, 32, 64, and 128
• Programmable channel-to-channel phase delay calibration with 244ns resolution at fCLKIN = 8.192MHz
• Current monitoring mode for ultralow-power tamper detection
• Fast startup: first data within 0.5ms of voltage ramp-up
• Integrated negative charge pump allows input signals below ground
• Channel-to-channel crosstalk: -120dB
• Low-drift internal voltage reference
• CRC for communication and register map
• 2.7V to 3.6V analog and digital supply
• Low power: 4.9mW at 3V AVDD and DVDD
• Package: 32-lead TQFP or 32-lead WQFN
• Operating temperature range: -40°C to +125°C

• Electricity meters: commercial and residential
• Circuit breakers
• Protective relays
• Power quality monitors
• Battery test equipment
• Battery management systems