ADS7138QRTERQ1

Analog To Digital Converters (ADC) Overview

The ADS7138QRTERQ1 is an automotive-grade, 8-channel, multiplexed, 12-bit successive approximation register (SAR) analog-to-digital converter. It features a flexible I2C-compatible interface supporting up to 3.4 MHz in high-speed mode and allows for eight configurable I2C addresses via the ADDR pin. The device operates with an analog supply voltage (AVDD) ranging from 2.35 V to 5.5 V and a digital supply voltage (DVDD) from 1.65 V to 5.5 V. It provides a typical signal-to-noise ratio of 73 dB and a spurious-free dynamic range of 91 dB at a 2 kHz input frequency. The component is housed in a compact 3 mm × 3 mm WQFN-16 package.

Analog To Digital Converters (ADC) Feature Summary

• Eight channels independently configurable as analog inputs, digital inputs, or general-purpose digital outputs.
• Built-in cyclic redundancy check (CRC) ensures data integrity for read/write operations and power-up configuration.
• Integrated digital window comparator enables analog watchdog functionality through event-triggered interrupts.
• Programmable averaging filter enhances resolution by outputting 16-bit results derived from internal conversions.

Analog To Digital Converters (ADC) Applications

• Automotive center information displays
• Automotive cluster displays
• Camera modules without processing

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix 'RTER' corresponds to the required reel packaging format and tape width. Confirm that the 'Q1' designation aligns with AEC-Q100 Grade 1 qualification requirements for your target automotive temperature range. Ensure the datasheet revision matches the design specifications before finalizing procurement orders.

Analog To Digital Converters (ADC) Selection Notes

Select this component when an 8-channel ADC with GPIO expansion capabilities is required within a constrained footprint. It is suitable for designs needing independent channel configuration without external multiplexers. Consider the wide operating voltage ranges if interfacing with mixed-voltage logic systems. Verify that the I2C address configuration via resistors meets the system's addressing constraints.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS7138 family, which distinguishes itself from similar devices like the ADS7128 by lacking RMS and zero-crossing detection modules. It is specifically qualified for automotive applications under AEC-Q100 standards. The device serves as a versatile interface solution for monitoring multiple signals while providing digital I/O expansion in a single integrated circuit.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS7138IRTER is the commercial grade equivalent offering identical electrical characteristics and pinout but without automotive qualification. Designers requiring non-automotive certification may substitute this part, provided the environmental operating conditions remain within the commercial range.