ADS7138-Q1 Automotive 8-Channel ADC
Author: EIS Release Date: Jan 3, 2021
Texas Instruments' small 12-bit ADC features I2C, GPIOs, and CDC
Texas Instruments' ADS7138-Q1 is an easy-to-use, 8-channel, multiplexed, 12-bit, successive approximation register (SAR) ADC. The eight channels can be independently configured as analog inputs, digital inputs, or digital outputs. The device has an internal oscillator for ADC conversion processes. The ADS7138-Q1 communicates via an I2C-compatible interface and operates in autonomous or single-shot conversion mode. The ADS7138-Q1 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-Q1 has a built-in cyclic redundancy check (CRC) for data read/write operations and the power-up configuration.
- AEC-Q100 qualified for automotive applications:
- Temperature Grade 1: -40°C to +125°C, TA
- Small package size: 3 mm × 3 mm WQFN
- Wettable flanks for visual inspection of solder joints
- 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
- Turbo comparator mode with speeds up to 3.2 MSPS
- Wide operating ranges:
- AVDD: 2.35 V to 5.5 V
- DVDD: 1.65 V to 5.5 V
- Temperature range: -40°C to +125°C
- 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
- Camera modules without processing
- Automotive center information displays
- Automotive cluster displays