AD6816KST

Overview

The AD6816KST is a high-speed, low-power, 12-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It features an SPI-compatible serial interface and operates on a single 5V supply. The device integrates a high-speed sample-and-hold amplifier and a precision voltage reference. Key electrical parameters include a throughput rate of 40 MSPS, a signal-to-noise ratio (SNR) of typically 69 dB at 1 MHz input frequency, and a total harmonic distortion (THD) of -75 dB. It supports both unipolar and bipolar input ranges with a full-scale input span of 0V to 5V or ±2.5V.

Feature Summary

• Integrates a high-speed sample-and-hold amplifier for accurate signal capture
• Includes an internal precision voltage reference to simplify system design
• Features a flexible SPI-compatible serial interface for easy microcontroller connection
• Operates from a single 5V power supply to reduce system complexity

Applications

• Portable instrumentation
• Industrial process control
• Medical equipment
• Communications systems

Procurement Notes

Verify the specific suffix 'KST' against the official Analog Devices datasheet to confirm package type (TSSOP-16) and temperature range (-40°C to +85°C). Ensure compatibility with existing SPI bus configurations and voltage levels. Confirm that the 40 MSPS throughput meets system timing requirements. Check for any RoHS compliance documentation if required for your region.

Selection Notes

Select this component when a balance of speed and power consumption is critical. The integrated reference eliminates external components, saving board space. Consider the 12-bit resolution for applications requiring moderate accuracy. Evaluate the SPI interface latency against your processor's capabilities. Compare performance metrics like SNR and THD against alternative ADCs in similar price and performance tiers.

Part Context

The AD6816 belongs to Analog Devices' family of high-speed, low-power data converters. It is designed for applications requiring efficient data acquisition without excessive power draw. The KST variant specifically denotes the TSSOP-16 package suitable for surface-mount assembly. This part complements other ADCs in the portfolio offering different resolutions and speeds.

Replacement Considerations

Check for direct pin-compatible replacements within the AD68xx series. Verify that substitute parts maintain the same 12-bit resolution and 40 MSPS speed. Ensure the replacement supports the same SPI protocol and voltage reference configuration. Confirm package dimensions match the existing PCB footprint.