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精密 ADC

ADS8924B

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具有内部 VREF 缓冲器、内部 LDO 和增强型 SPI 的 16 位 250kSPS 单通道 SAR ADC

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ADS8924B

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产品详情

Resolution (Bits) 16 Sample rate (max) (ksps) 250 Number of input channels 1 Interface type Enhanced SPI, SPI Architecture SAR Input type Differential Rating Catalog Reference mode External Input voltage range (max) (V) 5 Input voltage range (min) (V) 0 Features Daisy-Chainable, Oscillator Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 14 Analog supply voltage (min) (V) 3 Analog supply voltage (max) (V) 5.5 SNR (dB) 96.8 Digital supply (min) (V) 1.65 Digital supply (max) (V) 5.5
Resolution (Bits) 16 Sample rate (max) (ksps) 250 Number of input channels 1 Interface type Enhanced SPI, SPI Architecture SAR Input type Differential Rating Catalog Reference mode External Input voltage range (max) (V) 5 Input voltage range (min) (V) 0 Features Daisy-Chainable, Oscillator Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 14 Analog supply voltage (min) (V) 3 Analog supply voltage (max) (V) 5.5 SNR (dB) 96.8 Digital supply (min) (V) 1.65 Digital supply (max) (V) 5.5
VQFN (RGE) 24 16 mm² (4 mm × 4 mm)
  • Resolution: 16-Bits
  • High Sample Rate With No Latency Output:
    • ADS8920B: 1MSPS
    • ADS8922B: 500kSPS
    • ADS8924B: 250kSPS
  • Integrated LDO Enables Low-Power, Single-Supply Operation
  • Low-Power Reference Buffer With No Droop
  • Excellent AC and DC Performance:
    • SNR: 96.8dB, THD: –125dB
    • INL: ±0.25LSB
    • DNL: ±0.2LSB, 16-Bit No-Missing-Codes
  • Wide Input Range:
    • Unipolar DifferentialInput Range: ±VREF
    • VREF Input Range: 2.5V to 5V
  • Enhanced-SPI Digital Interface
    • Interface SCLK: 18MHz at 1MSPS
    • Configurable Data Parity Output
  • Extended Temperature Range: –40°C to +125°C
  • Small Footprint: 4mm × 4mm VQFN
  • Resolution: 16-Bits
  • High Sample Rate With No Latency Output:
    • ADS8920B: 1MSPS
    • ADS8922B: 500kSPS
    • ADS8924B: 250kSPS
  • Integrated LDO Enables Low-Power, Single-Supply Operation
  • Low-Power Reference Buffer With No Droop
  • Excellent AC and DC Performance:
    • SNR: 96.8dB, THD: –125dB
    • INL: ±0.25LSB
    • DNL: ±0.2LSB, 16-Bit No-Missing-Codes
  • Wide Input Range:
    • Unipolar DifferentialInput Range: ±VREF
    • VREF Input Range: 2.5V to 5V
  • Enhanced-SPI Digital Interface
    • Interface SCLK: 18MHz at 1MSPS
    • Configurable Data Parity Output
  • Extended Temperature Range: –40°C to +125°C
  • Small Footprint: 4mm × 4mm VQFN

The ADS8920B, ADS8922B, and ADS8924B (ADS892xB) belong to a family of pin-to-pin compatible, high-speed, single-channel, high-precision, 16-bit successive approximation register (SAR) based analog-to-digital convertors (ADCs) with an integrated reference buffer and integrated low-dropout regulator (LDO). The device family includes the ADS890xB (20-bit) and ADS891xB (18-bit) resolution variants.

The ADS892xB boost analog performance while maintaining high-resolution data transfer by using TI’s enhanced-SPI feature. Enhanced-SPI enables the ADS89xxB to achieve high throughput at lower clock speeds, thereby simplifying the board layout and lowering system cost. Enhanced-SPI also simplifies clocking-in of data, thereby making this device an excellent choice for applications involving FPGAs, DSPs. The ADS89xxB is compatible with a standard SPI.

The ADS8920B, ADS8922B, and ADS8924B (ADS892xB) belong to a family of pin-to-pin compatible, high-speed, single-channel, high-precision, 16-bit successive approximation register (SAR) based analog-to-digital convertors (ADCs) with an integrated reference buffer and integrated low-dropout regulator (LDO). The device family includes the ADS890xB (20-bit) and ADS891xB (18-bit) resolution variants.

The ADS892xB boost analog performance while maintaining high-resolution data transfer by using TI’s enhanced-SPI feature. Enhanced-SPI enables the ADS89xxB to achieve high throughput at lower clock speeds, thereby simplifying the board layout and lowering system cost. Enhanced-SPI also simplifies clocking-in of data, thereby making this device an excellent choice for applications involving FPGAs, DSPs. The ADS89xxB is compatible with a standard SPI.
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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 ADS892xB 16-Bit, High-Speed SAR ADCs With Integrated Reference Buffer, and Enhanced Performance Features 数据表 (Rev. C) PDF | HTML 2026-8-26
产品概述 PLC 模拟输入前端架构 PDF | HTML 英语版 PDF | HTML 2023-8-1
应用手册 Attenuator Amplifier Design to Maximize the Input Voltage of Differential ADCs 2018-6-14
应用简报 Improving Input Settling for Precision Data Converters 2017-12-12
应用简报 Optimizing Data Transfer on High-Resolution, High-Throughput Data Converters 2017-12-12
应用简报 Simplify Isolation Designs Using an Enhanced-SPI ADC Interface 2017-12-11
白皮书 Enabling Faster, Smarter, and More Robust Solutions for SAR ADSx With multiSPI 2016-11-8

设计与开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

评估板

ADS8900BEVM-PDK — ADS8900B 全差分输入、20 位 SAR ADC EVM 性能演示套件 (PDK)

ADS8900B 评估模块 (EVM) 性能演示套件 (PDK) 是一个用于评估 ADS8900B 逐次逼近型寄存器 (SAR) 模数转换器 (ADC) 性能的平台，该模数转换器是一款全差动输入、20 位、1-MSPS 器件。ADS8900BEVM-PDK 包括 ADS8900B EVM 板和支持随附计算机软件的精密主机接口 (PHI) 控制器板。

用户指南: PDF | HTML
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仿真模型

ADS8924B IBIS Model

SBAM296.ZIP (22 KB) - IBIS 模型
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仿真模型

ADS8924B PSpice Model

SBAM492.ZIP (12910 KB) - PSpice 模型
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仿真模型

ADS8924B TINA-TI Reference Design (Rev. A)

SBAM286A.ZIP (58 KB) - TINA-TI 参考设计
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仿真模型

ADS8924B TINA-TI Transient Spice Model

SBAM287.ZIP (14 KB) - TINA-TI Spice 模型
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计算工具

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

模拟工程师计算器旨在加快模拟电路设计工程师经常运用的许多重复性计算。该基于 PC 的工具提供图形界面，其中显示各种常见计算列表，从使用反馈电阻器设置运算放大器增益到选择合适的电路设计元件，以稳定模数转换器 (ADC) 驱动器缓冲器电路。

除了可用作独立工具之外，该计算器还能很好地与模拟工程师口袋参考中所述的概念配合使用。

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设计工具

ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.

The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
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参考设计

TIPD211 — 用于测试和测量应用的 20 位、1MSPS、4 通道小巧外形设计参考设计

混合信号 SOC 测试仪、存储器测试仪、电池测试仪、液晶显示屏 (LCD) 测试仪、台式设备、高密度数字卡、高密度电源卡、X 射线、MRI 等终端设备需要多个快速、同步采样通道，并具有出色的直流和交流性能，但需要低功耗和小布板空间。此设计中建议的解决方案采用高性能 SAR ADC (ADS8910B)、精密放大器 (OPA2625) 和精密电压基准 (REF5050)。
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封装 引脚 CAD 符号、封装和 3D 模型
VQFN (RGE) 24 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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