1 Features
• Small package size:
– WQFN 3mm × 3mm
• 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: 2.35V to 5.5V
– DVDD: 1.65V to 5.5V
– –40°C to +125°C temperature range
• Enhanced-SPI digital interface:
– High-speed, 60MHz interface
– Achieve full throughput with >13.5MHz SPI
• CRC for read/write operation:
– CRC on data read/write
– CRC on power-up configuration
• Programmable averaging filters:
– Programmable sample size for averaging
– Averaging with internal conversions
– 16-bit resolution

2 Applications
• Macro remote radio units (RRU)
• Battery management systems (BMS)
• String inverters
• Central inverters

3 Description
The ADS7038 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 the ADC
conversion process.
The ADS7038 communicates through an SPIcompatible
interface and operates in either
autonomous or single-shot conversion mode. The
ADS7038 implements the 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 ADS7038 has a built-in cyclic redundancy check
(CRC) for data read/write operations and the powerup
configuration.