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8-channel 12-bit analog-to-digital converter (ADC) with I2C interface, GPIOs and CRC


Package | PIN: WQFN (RTE) | 16
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $5.78
10-24 $5.20
25-99 $4.86
100-249 $4.36
250-499 $4.07
500-749 $3.54
750-999 $3.06
1,000+ $3.00


  • Small package size:
    • 3-mm × 3-mm WQFN
  • 8 channels configurable as any combination of:
    • Up to 8 analog inputs, digital inputs, or digitaloutputs
  • GPIOs for I/O expansion:
    • Open-drain, push-pull digital outputs
  • Analog watchdog:
    • Programmable thresholds perchannel
    • 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 +125°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)
    • 8 configurableI2C addresses
  • Programmable averaging filters:
    • Programmable sample size for averaging
    • Averaging with internal conversions
    • 16-bit resolution for average output

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Texas Instruments  XADS7138IRTER

The ADS7138 is an easy-to-use,8-channel, multiplexed, 12-bit, successive approximation register analog-to-digital converter (SARADC). The eight channels can be independently configured as either analog inputs, digital inputs,or digital outputs. The device has an internal oscillator for ADC conversionprocesses.

The ADS7138 communicates via anI2C-compatible interface and operates in either autonomous orsingle-shot conversion mode. The ADS7138 implements analog watchdogfunction by event-triggered interrupts per channel using a digital window comparator withprogrammable high and low thresholds, hysteresis, and an event counter. The ADS7138 has a built-in cyclic redundancy check (CRC) for data read/writeoperations and the power-up configuration.