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.