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CD12AD02
Weak Signal Acquisition ASIC Chip
CD12AD02
RoHS
Highly integrated ASIC for weak signal acquisition
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  • CD12AD02-DIE
    CD12AD02-DIE
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  • CD12AD02D
    CD12AD02D
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  • CD12AD02B
    CD12AD02B
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  • Supply Voltage(V): 2.2V to 3.6V
  • 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
  • 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
  • Controllable Input Impedance: 10GΩ~1TΩ
  • 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


  • Pyroelectric Gas Detector
  • Pyroelectric Flame Detector
  • Instruments, sensors, and other devices that require detection of microvolt-to-millivolt (μV~mV) level weak signals and demand gigaohm-to-teraohm (GΩ~TΩ) level high input impedance
  • Low-Side Current Sensing


Description
The CD12AD0X series is a highly integrated ASIC for weak signal acquisition, corely breaking through the "impossible triangle" dilemma of traditional discrete component solutions—balancing high performance, low power consumption, and design simplicity. Leveraging the proprietary CD ADC™ technology, it enables the shortest path and purest signal chain from sensor to digital domain without requiring an additional PGA (Programmable Gain Amplifier). The single-chip integrated design simplifies the complex analog front-end (AFE) to a user-friendly digital interface. It not only delivers a single-chip solution for femtoampere (fA)-level signal processing at the pyroelectric detector front-end but also offers customers three core advantages: high performance, low power consumption, and cost-effectiveness, facilitating shorter R&D cycles and accelerated product time-to-market.
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Products Selection
  • CD12AD02-DIE
    CD12AD02-DIE
    Package：Die Price：

    Package：Die

    Stock：1000

    package Qty：--

    Price：

  • CD12AD02D
    CD12AD02D
    Package：DFN-8 Price：

    Package：DFN-8

    Stock：1000

    package Qty：

    Price：

  • CD12AD02B
    CD12AD02B
    Package：DFN-8 Price：

    Package：DFN-8

    Stock：1000

    package Qty：

    Price：

Price：
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