Products
CD12AD02
Weak Signal Acquisition ASIC Chip
Highly integrated ASIC for weak signal acquisition
Active | Production cycle:
Description

The CD12AD1X series is a high-integration ASIC chip for weak signal acquisition, with the core goal of solving the "impossible triangle" dilemma of traditional discrete component solutions between high performance, low power consumption and design complexity. Leveraging the proprietary CD ADC™ technology, it can build the shortest and purest signal path from the sensor to the digital domain without the need for a PGA. The single-chip design integrates complex analog front-ends into simple digital interface docking, providing customers with an integrated solution featuring high performance, low power consumption and cost-effectiveness, while shortening the R&D cycle and helping products launch quickly. The CD12AD1X boasts low power consumption, delivering excellent battery life for portable and IoT devices.

  • Supply Voltage(V): 2.2V to 3.6V
  • Target Detector: Pyroelectric
  • SNR(dB): 84
  • Operating Current(μA)(@500sps): -40
  • Input Range (mV)(Differential): ±82
  • Sampling Rate: 125sps to 8ksps
  • Temperature Range(°C): -40 to 85


  • CD ADC™ Micro-Signal Direct Conversion Technology: Eliminates the need for complex multi-stage amplification chains, enabling direct digitization of micro-signals
  •  High-Precision Analog-to-Digital Converter (ADC)
  • Output LSB as low as 2.5μV
  • Full-Scale Range (FSR): 82mV
  • Flexible Sampling Rate Control

    -- High-Performance Mode: 125Hz~1kHz

    -- High-Speed Mode: Up to 8kHz

  • Signal-to-Noise Ratio (SNR): Up to 84dB
  • Common-Mode Rejection Ratio (CMRR): >90dB
  • Equivalent Differential Input Capacitance:<1.5pf
  • Dual-Channel Continuous Operating Current: Only 40μA @ 500sps
  • I2C Communication Interface for Configuration and Signal Reading
  • SDA Pin Multiplexable as Interrupt Output
  • Conversion Complete Interrupt and Conditional Interrupt, Reducing MCU Duty Cycle
  • Single-Wire Transmission Interface DOCI (Data Out Clock In)
  • Built-in Multiple Digital Filters

    -- Programmable Low-Pass Filter

    -- Programmable High-Pass Filter

  • Ultra-Small DFN-8 (2mm * 2mm) Package
  • Die Form Available
  • Wide Operating Voltage Range: 2.2V~3.6V


  • Thermopile Detector
  • Low-Side Current Sensing


Parameters

Part Number
Package
Supply Voltage(V)
Target Detector
Input Impedance
SNR(dB)
Operating Current(μA)(@500sps)
Input Range (mV)(Differential)
Sampling Rate
Temp Range(°C)
Open
PackageDie
Supply Voltage(V) 2.2 to 3.6
Target Detector Pyroelectric
Input Impedance 10GΩ to 1.28TΩ
SNR(dB) 84
Operating Current(μA)(@500sps) -40
Input Range (mV)(Differential) ±82
Sampling Rate 125sps to 8ksps
Temp Range(°C) -40 to 85
Open
PackageDFN-8
Supply Voltage(V) 2.2 to 3.6
Target Detector Pyroelectric
Input Impedance 10GΩ to 1.28TΩ
SNR(dB) 84
Operating Current(μA)(@500sps) -40
Input Range (mV)(Differential) ±82
Sampling Rate 125sps to 8ksps
Temp Range(°C) -40 to 85
Open
PackageDFN-8
Supply Voltage(V) 2.2 to 3.6
Target Detector Pyroelectric
Input Impedance 10GΩ to 1.28TΩ
SNR(dB) 84
Operating Current(μA)(@500sps) -40
Input Range (mV)(Differential) ±82
Sampling Rate 125sps to 8ksps
Temp Range(°C) -40 to 85
Open
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