ADS9815RSHR

Analog To Digital Converters (ADC) Overview

The ADS9815RSHR is an 8-channel, 18-bit simultaneous-sampling analog-to-digital converter (ADC) from Texas Instruments. It integrates a complete analog front end with a programmable gain amplifier (PGA), input clamp protection, and a 1 MΩ input impedance. The device supports dual simultaneous sampling at a throughput of 1 MSPS per channel. It features configurable single-ended or differential inputs with common-mode voltages up to ±12 V and overvoltage protection up to ±18 V. Integrated precision references include a 4.096 V ADC reference and a 2.5 V output for external circuits. The digital interface operates within a 1.2 V to 1.8 V range.

Analog To Digital Converters (ADC) Feature Summary

• 8-channel, 18-bit SAR ADC architecture with dual simultaneous sampling capability
• Integrated analog front end featuring 1 MΩ input impedance and user-selectable bandwidth options (21 kHz and 400 kHz)
• Programmable input ranges including ±12 V, ±10 V, ±7 V, ±5 V, ±3.5 V, and ±2.5 V
• High performance metrics: DNL ±0.3 LSB, INL ±1.5 LSB, SNR 92.2 dB, and THD -112 dB

Analog To Digital Converters (ADC) Applications

• Semiconductor testing equipment
• General data acquisition systems
• Battery testing applications

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'RSHR' corresponds to the tape-and-reel packaging configuration as indicated by standard TI naming conventions. Confirm the operating temperature range and ensure compatibility with the required 1.2 V to 1.8 V digital logic levels. Cross-reference the datasheet revision to validate pinout and electrical characteristics against current production standards.

Analog To Digital Converters (ADC) Selection Notes

Select this component when high channel count and precise synchronization are required. The ADS9815 offers 1 MSPS per channel, whereas the ADS9817 variant provides 2 MSPS. The integrated 1 MΩ input impedance allows direct connection to sensors and transformers without external drivers. Ensure the application requires the specific 18-bit resolution and the supported input voltage ranges.

Analog To Digital Converters (ADC) Part Context

The ADS9815RSHR belongs to the ADS981x family of 8-channel, 18-bit simultaneous-sampling ADCs. This family includes the ADS9815 (1 MSPS/channel) and ADS9817 (2 MSPS/channel). All variants share the same integrated analog front-end architecture, pinout, and feature set, differing primarily in maximum sampling speed.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS9817RSHR serves as a higher-speed alternative within the same package and feature set, offering 2 MSPS per channel instead of 1 MSPS. Other ADS981x variants may be considered if different sampling rates are acceptable.