ADS7924 - 具有智能系统电源控制的 12 位、4 通道 MUX 输入 SAR ADC

ADS7924是TI德州仪器公司的一款精密ADC(<=10MSPS)产品，ADS7924是具有智能系统电源控制的 12 位、4 通道 MUX 输入 SAR ADC，本站介绍了ADS7924的封装应用图解、特点和优点、功能等，并给出了与ADS7924相关的TI元器件型号供参考。

ADS7924 - 具有智能系统电源控制的 12 位、4 通道 MUX 输入 SAR ADC - 精密ADC(<=10MSPS) - 模数转换器 - 德州仪器

产品特性

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 QFN

产品应用

Portable and Battery-Powered Systems:
- Medical, Communications, Remote Sensor Signal Monitoring, Power-Supply Monitoring
Energy Harvesting

产品说明

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 QFN and is fully specified for operation over the industrial temperature range of –40°C to 85°C.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
ADS7924	WQFN (16)	3.00 mm × 3.00 mm

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