ADS9813RSHR

Analog To Digital Converters (ADC) Overview

The ADS9813RSHR is an eight-channel, 18-bit successive approximation register (SAR) analog-to-digital converter (ADC) manufactured by Texas Instruments. It integrates a complete analog front-end (AFE) with input clamp protection and a programmable gain amplifier (PGA). The device supports simultaneous sampling at up to 2 MSPS per channel. Key electrical parameters include a differential nonlinearity (DNL) of ±0.35 LSB, integral nonlinearity (INL) of ±0.8 LSB, and a signal-to-noise ratio (SNR) of 90.3 dBFS in low-bandwidth mode. It operates with a 5V analog supply and 1.8V digital supply, featuring a constant 1MΩ input impedance and overvoltage protection up to ±18V.

Analog To Digital Converters (ADC) Feature Summary

• Eight-channel 18-bit SAR ADC with simultaneous sampling capability at 2 MSPS per channel
• Integrated analog front-end with user-selectable bandwidth options (22.7 kHz or 700 kHz)
• Programmable input ranges including ±12V, ±10V, ±7V, ±5V, ±3.5V, and ±2.5V
• High input impedance of 1MΩ allowing direct connection to sensors and transformers

Analog To Digital Converters (ADC) Applications

• Industrial process control systems requiring high-resolution multi-channel data acquisition
• Power quality monitoring and energy metering applications
• Structural health monitoring and vibration analysis systems
• Medical equipment requiring isolated or high-impedance sensor interfaces

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'RSHR' against the official datasheet to confirm package type (VQFN-56) and tape-and-reel packaging configuration. Ensure compatibility with the required operating temperature range of -40°C to +125°C for the intended environment. Cross-reference the manufacturer's latest documentation for any pinout or electrical specification updates prior to final procurement.

Analog To Digital Converters (ADC) Selection Notes

Select this component when simultaneous multi-channel sampling is required with integrated signal conditioning. The fixed 1MΩ input impedance eliminates the need for external buffer amplifiers in many sensor applications. Consider the available programmable input voltage ranges to match the sensor output levels directly. Verify that the SPI interface voltage levels are compatible with the host microcontroller if level shifting is not implemented externally.

Analog To Digital Converters (ADC) Part Context

The ADS9813 belongs to the ADS981x family of high-performance, multi-channel ADCs from Texas Instruments. This series is designed for applications demanding high accuracy and speed without external analog components. The RSHR suffix typically denotes the VQFN-56 package variant supplied in a reel format, distinguishing it from other package options like the TQFP.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS9811 and ADS9810 are part of the same family but operate at a lower maximum throughput of 1 MSPS per channel. These may serve as functional substitutes if the higher 2 MSPS rate of the ADS9813 is not required. Verify pin compatibility and software register configurations when migrating between these variants.