ADS9817RSHR

Analog To Digital Converters (ADC) Overview

The Texas Instruments ADS9817RSHR is an 8-channel, 18-bit analog-to-digital converter (ADC) based on a dual simultaneous-sampling successive approximation register (SAR) architecture. It features a complete integrated analog front-end with constant 1MΩ input impedance and programmable gain amplifiers. The device supports sampling rates up to 2 MSPS per channel with total power dissipation of 232 mW at maximum throughput. It operates with analog supply voltages of 4.75 V to 5.25 V and digital supplies of 1.75 V to 1.85 V. The component provides excellent AC performance, including a signal-to-noise ratio of 92 dBFS and total harmonic distortion of -113 dB.

Analog To Digital Converters (ADC) Feature Summary

• Dual simultaneous sampling architecture supporting four pairs of channels for synchronized data acquisition
• Integrated analog front-end with high input impedance eliminating the need for external driver circuits
• User-selectable analog input bandwidth options optimized for either low noise or wideband signal capture
• Built-in precision voltage references providing stable ADC excitation and external circuit support

Analog To Digital Converters (ADC) Applications

• Parametric measurement units (PMU)
• Battery cell formation and test equipment
• Data acquisition (DAQ) systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the RSH suffix indicates the 56-pin VQFN package configuration. Confirm that the RSHR suffix specifically denotes the reel packaging format required for automated surface-mount assembly processes. Ensure compatibility with standard SPI configuration interfaces and check thermal management requirements for the exposed pad connection.

Analog To Digital Converters (ADC) Selection Notes

Select the ADS9817 over the ADS9815 when higher throughput is required, as it supports 2 MSPS per channel compared to 1 MSPS. Consider the integrated analog front-end capabilities if minimizing external component count is a priority. Evaluate the 18-bit resolution against system accuracy requirements and verify that the ±12V common-mode voltage range meets input signal specifications.

Analog To Digital Converters (ADC) Part Context

This component belongs to the ADS981x family of high-precision data acquisition systems. It shares architectural similarities with the ADS9815 but offers increased sampling speed. The series is designed for industrial applications requiring multi-channel synchronization and high dynamic range performance without complex external signal conditioning.

Analog To Digital Converters (ADC) Replacement Considerations

ADS9815RSHT: Offers identical pinout and functionality but limited to 1 MSPS per channel.

Analog To Digital Converters (ADC) FAQ

What is the maximum sampling rate supported by this device?

The ADS9817 supports a maximum sampling rate of 2 MSPS per channel.

Does the device require external drivers for sensor connections?

No, the constant 1MΩ input impedance allows direct connection to sensors and transformers without external driver circuits.

What are the available analog input bandwidth settings?

The device offers user-selectable analog input bandwidths of 21 kHz and 400 kHz depending on the specific input range configuration.