12-Bit 4-Ch MUX-Input SAR ADC With Intelligent System Power Control
Product details
Parameters
Package | Pins | Size
Features
- 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
- Four-Channel Scanning:
- 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
Description
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.
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Data sheet | ADS7924 2.2 V, 12-Bit, 4-Channel, MicroPOWER Analog-to-Digital Converter With I2C Interface datasheet (Rev. C) | Sep. 15, 2017 |
| E-book | Best of Baker's Best: Precision Data Converters -- SAR ADCs | May 21, 2015 | |
| Application note | Determining Minimum Acquisition Times for SAR ADCs, part 2 | Mar. 17, 2011 | |
| Application note | Determining Minimum Acquisition Times for SAR ADCs, part 1 (Rev. A) | Nov. 10, 2010 | |
| Application note | Obtaining 17 Bits of Resolution using a 12-Bit A/D System on a Chip | Jun. 24, 2010 | |
| User guide | ADS7924EVM/ADS7924EVM-PDK User's Guide | Jun. 09, 2010 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
ADCPro™ is a modular software system for evaluating analog-to-digital converters (ADCs) without the need for expensive logic analyzers and complex analysis routines. Used alone it is suitable for performing analysis on data sets captured from ADC testing; when paired with a Texas Instruments (...)
Features
ADCPro software from Texas Instruments will simplify the tasks of collecting and analyzing ADC data, and ease evaluation. With it, you can easily set up an evaluation system that may not exactly replicate the manufacturer's system, but still arrive at meaningful results that can be compared to (...)
Description
The ADS7924EVM is an evaluation board for the ADS7924, a four-channel, 12-bit, analog-to-digital converter (ADC) with an I²C™ interface. The modular EVM uses the ADS7924 and minimal circuitry to demonstrate functionality for prototyping and part evaluation. The pins of the ADS7924 are (...)
Features
- Contains all support circuitry needed for the ADS7924
- Buffer options: Onboard analog input buffer can be bypassed
- Compatible with the TI Modular EVM System
Description
The ADS7924EVM-PDK is a complete evaluation/demonstration kit, which combines the ADS7924EVM with the MSP430-based MMB3 motherboard for use with a personal computer. The MMB3 motherboard allows the ADS7924EVM to connect to a computer via a USB port. The ADS7924EVM-PDK is controlled by the (...)
Features
- Easy-to-use evaluation software for Microsoft™ Windows XP and Windows 7
- Built-in analysis tools including scope, FFT, and histogram displays
- Data collection to text files
- Complete control of board settings
- Easily expandable with new analysis plug in tools from Texas Instruments
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Features
- Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
- Noise calculations
- Common unit translation
- Solves common amplifier circuit design problems
- Gain selections using standard resistors
- Filter configurations
- Total noise for common amplifier configurations
- (...)
Reference designs
Design files
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| WQFN (RTE) | 16 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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