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Texas Instruments ADS892xB 16位SAR模数转换器

Texas Instruments ADS892xB 16位SAR模数转换器(ADC)系列产品是引脚到引脚兼容的高速、高精度、基于逐次逼近寄存器(SAR)的模数转换器。 这些器件均集成了参考缓冲区和低压差稳压器(LDO)。 这些器件在指定温度范围内支持符合±0.5LSB INL和96dB SNR规范的单极全差分模拟量输入信号。 集成LDO支持低功耗单电源运行。 集成参考缓冲区支持在突发模式下采集数据，以16位精度进行首次采样。 支持2.5V到5V外部基准电压，提供广泛的输入范围选择，无需额外调节输入。 集成multiSPI数字接口向后兼容传统的SPI协议。 此外，可配置特性简化了电路板布局、时序和固件，支持以较低时钟速度实现高吞吐量。 MultiSPI数字接口支持轻松连接各种微控制器、数字信号处理器(DSP)和现场可编程门阵列 (FPGA)。

External reference voltages in the range 2.5V to 5V are supported, offering a wide selection of input ranges without additional input scaling. The integrated multiSPI digital interface is backward-compatible to the traditional SPI protocol. Additionally, configurable features simplify board layout, timing, and firmware and support high throughput at lower clock speeds. The multiSPI digital interface of the Texas Instruments ADS892xB allows for easy interface with various microcontrollers, digital signal processors (DSPs), and field-programmable gate arrays (FPGAs).

特性

  • 16-bit resolution
  • High sample rate with no latency output
    • ADS8920B: 1MSPS
    • ADS8922B: 500kSPS
    • ADS8924B: 250kSPS
  • Integrated LDO enables single-supply operation
  • Burst-mode operation with a precise first sample
  • Excellent AC and DC performance
    • SNR: 96.8dB, THD: –125dB
    • INL: ±0.5LSB (max.)
    • DNL: ±0.5LSB (max.), 16-Bit NMC
  • Wide input range
    • ±VREF unipolar differential input range 
    • VREF Input Range: 2.5V to 5V
  • Single-supply, low-power operation (includes internal reference buffer and LDO)
    • ADS8920B: 21mW at 1MSPS
    • ADS8922B: 16mW at 500kSPS
    • ADS8924B: 14mW at 250kSPS
  • multiSPI digital interface
  • –40°C to +125°C extended temperature range 
  • Small footprint: 4mm × 4mm VQFN

应用

  • Test and measurement
  • Medical imaging
  • High-precision, high-speed data acquisition

视频

Functional Block Diagram

框图 - Texas Instruments ADS892xB 16位SAR模数转换器
发布日期: 2016-12-12 | 更新日期: 2022-03-11