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ADS7924

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具有智能系统功耗控制功能的 12 位 4 通道多路输入 SAR ADC

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ADS7142 正在供货 具有 1.8V 运行电压并采用 1.5mm x 2mm QFN 封装的 12 位 140kSPS 2 通道毫微功耗 SAR ADC 2 channel, nanopower, small size

ADS7924

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产品详情

Resolution (Bits) 12 Sample rate (max) (ksps) 100 Number of input channels 4 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 Oscillator, Small Size Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 0.5 Analog supply voltage (min) (V) 2.2 Analog supply voltage (max) (V) 5.5 Digital supply (min) (V) 1.65 Digital supply (max) (V) 5.5
Resolution (Bits) 12 Sample rate (max) (ksps) 100 Number of input channels 4 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 Oscillator, Small Size Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 0.5 Analog supply voltage (min) (V) 2.2 Analog supply voltage (max) (V) 5.5 Digital supply (min) (V) 1.65 Digital supply (max) (V) 5.5
WQFN (RTE) 16 9 mm² (3 mm × 3 mm)
  • Intelligent Monitoring:
    • Auto-Sequencing of 4-Channel Multiplexer
    • Individual Alarm Thresholds for Each Channel
    • Programmable Scan Rate
  • MicroPOWER™ Monitoring:
    • Four-Channel Scanning:
      • Every 1 ms → 25 µW
      • Every 10 ms → 5 µW
      • < 1 µA of Power-Down Current
    • Programmable Interrupt Pin Controls Shutdown/Wakeup of the Microcontroller
    • Auto Power-Down Control
    • PWRCON Pin Allows Shutdown of External Operational Amplifiers
  • Wide Supply Range:
    • Analog Supply: 2.2 V to 5.5 V
    • Digital Supply: 1.65 V to 5.5 V
  • Small Footprint: 3-mm × 3-mm WQFN
  • Intelligent Monitoring:
    • Auto-Sequencing of 4-Channel Multiplexer
    • Individual Alarm Thresholds for Each Channel
    • Programmable Scan Rate
  • MicroPOWER™ Monitoring:
    • Four-Channel Scanning:
      • Every 1 ms → 25 µW
      • Every 10 ms → 5 µW
      • < 1 µA of Power-Down Current
    • Programmable Interrupt Pin Controls Shutdown/Wakeup of the Microcontroller
    • Auto Power-Down Control
    • PWRCON Pin Allows Shutdown of External Operational Amplifiers
  • Wide Supply Range:
    • Analog Supply: 2.2 V to 5.5 V
    • Digital Supply: 1.65 V to 5.5 V
  • Small Footprint: 3-mm × 3-mm WQFN

The ADS7924 is a four-channel, 12-bit, analog-to-digital converter (ADC) with an I2C™ interface. With its low-power ADC core, support for low-supply operation, and a flexible measurement sequencer that essentially eliminates power consumption between conversions, the ADS7924 forms a complete monitoring system for power-critical applications such as battery-powered equipment and energy harvesting systems.

The ADS7924 features dedicated data registers and onboard programmable digital threshold comparators for each input. Alarm conditions can be programmed that generate an interrupt. The combination of data buffering, programmable threshold comparisons, and alarm interrupts minimize the host microcontroller time needed to supervise the ADS7924.

The four-channel input multiplexer (MUX) is routed through external pins to allow a common signal conditioning circuit to be used between the MUX and ADC, thereby reducing overall component count. The low-power ADC uses the analog supply as its reference and can acquire and convert signals in only 10 µs. An onboard oscillator eliminates the need to supply a master clock.

The ADS7924 is offered in a small 3-mm × 3-mm WQFN and is fully specified for operation over the industrial temperature range of –40°C to 85°C.

The ADS7924 is a four-channel, 12-bit, analog-to-digital converter (ADC) with an I2C™ interface. With its low-power ADC core, support for low-supply operation, and a flexible measurement sequencer that essentially eliminates power consumption between conversions, the ADS7924 forms a complete monitoring system for power-critical applications such as battery-powered equipment and energy harvesting systems.

The ADS7924 features dedicated data registers and onboard programmable digital threshold comparators for each input. Alarm conditions can be programmed that generate an interrupt. The combination of data buffering, programmable threshold comparisons, and alarm interrupts minimize the host microcontroller time needed to supervise the ADS7924.

The four-channel input multiplexer (MUX) is routed through external pins to allow a common signal conditioning circuit to be used between the MUX and ADC, thereby reducing overall component count. The low-power ADC uses the analog supply as its reference and can acquire and convert signals in only 10 µs. An onboard oscillator eliminates the need to supply a master clock.

The ADS7924 is offered in a small 3-mm × 3-mm WQFN and is fully specified for operation over the industrial temperature range of –40°C to 85°C.
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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 ADS7924 2.2 V, 12-Bit, 4-Channel, MicroPOWER Analog-to-Digital Converter With I2C Interface 数据表 (Rev. C) PDF | HTML 2017-9-15
应用手册 A Basic Guide to I2C PDF | HTML 2022-11-8
电子书 Best of Baker's Best: Precision Data Converters -- SAR ADCs 2015-5-21
应用手册 Determining Minimum Acquisition Times for SAR ADCs, part 2 2011-3-17
应用手册 Determining Minimum Acquisition Times for SAR ADCs, part 1 (Rev. A) 2010-11-10
应用手册 Obtaining 17 Bits of Resolution using a 12-Bit A/D System on a Chip 2010-6-24

设计与开发

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评估板

ADS7924EVM-PDK — ADS7924 性能演示套件

ADS7924EVM-PDK 是一套完整的评估/演示套件，它将 ADS7924EVM 与基于 MSP430 的 MMB3 主板组合在一起，可与个人电脑配合使用。MMB3 主板允许 ADS7924EVM 通过 USB 端口连接到计算机。ADS7924EVM-PDK 由使用插件的 ADCPro™ 评估软件控制。该软件可以在 Microsoft™ Windows 操作系统中运行，可实现对 ADS7924 器件的完整评估。

 

用户指南: PDF
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仿真模型

ADS7924 IBIS Model

SBAM023.ZIP (86 KB) - IBIS 模型
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仿真模型

ADS7924 TINA-TI Reference Design

SBAM427.TSC (556 KB) - TINA-TI 参考设计
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仿真模型

ADS7924 TINA-TI Spice Mode

SBAM428.ZIP (9 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

TIDA-00782 — 采用 DLP® 技术的便携式高亮度高清投影显示器参考设计

此参考设计采用 DLP Pico™ 0.45 英寸 WXGA 显示芯片组，可将高清分辨率用于投影显示应用，例如辅助投影仪、智能投影仪、移动智能电视、内置投影仪（例如笔记本电脑和热点内的投影功能）。此设计中使用的芯片组包括 DLP4501 (0.45 WXGA) DMD 和 DLPC6401 显示控制器。可通过以下链接访问外部 LED 驱动器参考设计：PMP4356

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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。

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