Small 8-ch 12-bit analog-to-digital converter (ADC) with I2C interface, GPIOs, CRC and RMS module
Product details
Parameters
Package | Pins | Size
Features
- 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 +85°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
- Root-mean-square module:
- 16-bit true RMS output
- Programmable RMS time window
- Zero-crossing-detect module:
- ZCD output corresponding to any analog input
- Built-in transient rejection and hysteresis
- Digitally adjustable detection threshold
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Description
The ADS7128 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 ADS7128 communicates via an I2C-compatible interface and operates in either autonomous or single-shot conversion mode. The ADS7128 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 ADS7128 has a built-in cyclic redundancy check (CRC) for data read/write operations and the power-up configuration. The ADS7128 features a root-mean-square (RMS) module that computes a 16-bit true RMS result for any analog input channel. The integrated zero-crossing-detect (ZCD) module allows for transient rejection and hysteresis near the configurable threshold crossings.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | ADS7128 Small, 8-Channel, 12-Bit ADC With I2C Interface, GPIOs, and CRC datasheet (Rev. A) | May 20, 2020 |
Application note | Resolution-Boosting ADS7138 Using Programmable Averaging Filter | Dec. 01, 2019 | |
User guide | BP-ADS7128 BoosterPack™ Plug-In Module User's Guide | May 21, 2019 | |
Application note | Zero-Crossing Detection with False Trigger Avoidance | Jan. 09, 2019 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The BP-ADS7128 BoosterPack™ plug-in module is a platform for evaluating the performance of the successive approximation register (SAR) analog-to-digital converter (ADC) ADS7128 device and family of devices, which are analog, nanopower, eight-input-channel devices with an I/O expander.
BP-ADS7128 is (...)
Features
- Hardware and software required for diagnostic testing, as well as accurate performance evaluation of ADS7128 SAR ADC
- USB powered; no external power supply required
- Pairs with MSP-EXP432E401Y LaunchPad™ development kit, providing a convenient communication interface over a USB for power delivery (...)
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
- (...)
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
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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