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ADS7138

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具有 I2C、GPIO 和 CRC 的 8 通道、140kSPS、12 位模数转换器 (ADC)

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ADS7138

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产品详情

Resolution (Bits) 12 Sample rate (max) (ksps) 140 Number of input channels 8 Interface type I2C Architecture SAR Input type Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode Supply Input voltage range (max) (V) 5.5 Input voltage range (min) (V) 0 Features Comparator, GPIO, Oscillator, Small Size Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 0.05 Analog supply voltage (min) (V) 2.35 Analog supply voltage (max) (V) 5.5 SNR (dB) 73 Digital supply (min) (V) 1.65 Digital supply (max) (V) 5.5
Resolution (Bits) 12 Sample rate (max) (ksps) 140 Number of input channels 8 Interface type I2C Architecture SAR Input type Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode Supply Input voltage range (max) (V) 5.5 Input voltage range (min) (V) 0 Features Comparator, GPIO, Oscillator, Small Size Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 0.05 Analog supply voltage (min) (V) 2.35 Analog supply voltage (max) (V) 5.5 SNR (dB) 73 Digital supply (min) (V) 1.65 Digital supply (max) (V) 5.5
WQFN (RTE) 16 9 mm² (3 mm × 3 mm)
  • Small package size:
    • 3-mm × 3-mm WQFN
  • 8 channels configurable as any combination of:
    • Up to 8 analog inputs, digital inputs, or digital outputs
  • GPIOs for I/O expansion:
    • Open-drain, push-pull digital outputs
  • Analog watchdog:
    • Programmable thresholds per channel
    • Event counter for transient rejection
  • Wide operating ranges:
    • AVDD: 2.35 V to 5.5 V
    • DVDD: 1.65 V to 5.5 V
    • –40°C to +125°C temperature range
  • CRC for read/write operations:
    • CRC on data read/write
    • CRC on power-up configuration
  • I2C interface:
    • Up to 3.4 MHz (high-speed mode)
    • 8 configurable I2C addresses
  • Programmable averaging filters:
    • Programmable sample size for averaging
    • Averaging with internal conversions
    • 16-bit resolution for average output
  • Small package size:
    • 3-mm × 3-mm WQFN
  • 8 channels configurable as any combination of:
    • Up to 8 analog inputs, digital inputs, or digital outputs
  • GPIOs for I/O expansion:
    • Open-drain, push-pull digital outputs
  • Analog watchdog:
    • Programmable thresholds per channel
    • Event counter for transient rejection
  • Wide operating ranges:
    • AVDD: 2.35 V to 5.5 V
    • DVDD: 1.65 V to 5.5 V
    • –40°C to +125°C temperature range
  • CRC for read/write operations:
    • CRC on data read/write
    • CRC on power-up configuration
  • I2C interface:
    • Up to 3.4 MHz (high-speed mode)
    • 8 configurable I2C addresses
  • Programmable averaging filters:
    • Programmable sample size for averaging
    • Averaging with internal conversions
    • 16-bit resolution for average output

The ADS7138 is an easy-to-use, 8-channel, multiplexed, 12-bit, successive approximation register analog-to-digital converter (SAR ADC). The eight channels can be independently configured as either analog inputs, digital inputs, or digital outputs. The device has an internal oscillator for ADC conversion processes.

The ADS7138 communicates via an I2C-compatible interface and operates in either autonomous or single-shot conversion mode. The ADS7138 implements analog watchdog function by event-triggered interrupts per channel using a digital window comparator with programmable high and low thresholds, hysteresis, and an event counter. The ADS7138 has a built-in cyclic redundancy check (CRC) for data read/write operations and the power-up configuration.

The ADS7138 is an easy-to-use, 8-channel, multiplexed, 12-bit, successive approximation register analog-to-digital converter (SAR ADC). The eight channels can be independently configured as either analog inputs, digital inputs, or digital outputs. The device has an internal oscillator for ADC conversion processes.

The ADS7138 communicates via an I2C-compatible interface and operates in either autonomous or single-shot conversion mode. The ADS7138 implements analog watchdog function by event-triggered interrupts per channel using a digital window comparator with programmable high and low thresholds, hysteresis, and an event counter. The ADS7138 has a built-in cyclic redundancy check (CRC) for data read/write operations and the power-up configuration.

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技术文档

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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 ADS7138 Small, 8-Channel, 12-Bit ADC With I2C Interface, GPIOs, and CRC 数据表 (Rev. A) PDF | HTML 2020-5-20
应用简报 符合数据中心 mCRPS 标准的高速电流检测 PDF | HTML PDF | HTML 2026-4-13
应用手册 一款基于浏览器的简单 CRC 计算器 PDF | HTML PDF | HTML 2026-3-16
技术文章 How tiny data converters give you more value per square PDF | HTML 2019-12-11
应用简报 Resolution-Boosting ADS7138 Using Programmable Averaging Filter 2019-12-1
用户指南 BP-ADS7128 BoosterPack™ Plug-In Module User's Guide 2019-5-21

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

BP-ADS7128 — ADS7128 8 通道 12 位 ADC BoosterPack™ 插件模块

BP-ADS7128 BoosterPack™ 插件模块是一个用于评估逐次逼近型寄存器 (SAR) 模数转换器 (ADC) ADS7128 器件和系列器件性能的平台，这些器件是具有 I/O 扩展器的模拟、毫微功耗、八输入通道器件。

BP-ADS7128 可展示 ADS7128 的各种工作模式。它可与 MSP-EXP432E401Y MCU LaunchPad™ 开发套件（单独出售）搭配使用。

支持的产品和硬件
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支持软件

SBAC285 — ADS7138 C Header File

支持的产品和硬件
仿真模型

ADS7128 IBIS Model

SBAM437.ZIP (139 KB) - IBIS 模型
支持的产品和硬件
仿真模型

ADS7128 TINA-TI Reference Design

SBAM429.TSC (274 KB) - TINA-TI 参考设计
支持的产品和硬件
仿真模型

TLA2528 TINA-TI Reference Design

SBAM432.TSC (272 KB) - TINA-TI 参考设计
支持的产品和硬件
仿真模型

TLA2528 TINA-TI Spice Model

SBAM431.ZIP (11 KB) - TINA-TI Spice 模型
支持的产品和硬件
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。

支持的产品和硬件
计算工具

SBAR008 — ADS7xx8 CRC Calculator

支持的产品和硬件
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.
支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
WQFN (RTE) 16 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

订购和质量

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