ADS7953SRHBT

Analog To Digital Converters (ADC) Overview

The ADS7953SRHBT is a 12-bit, 1-MSPS, 16-channel single-ended microPower SAR ADC manufactured by Texas Instruments. It features a serial interface and operates within an analog supply voltage range of 2.7 V to 5.25 V and a digital supply voltage range of 1.7 V to 5.25 V. The device utilizes a successive approximation register architecture with an external reference type and a typical reference voltage of 2.51 V. Key performance metrics include a signal-to-noise ratio (SNR) of 70 dB and a signal-to-noise and distortion ratio (SINAD) of 71.3 dB. Differential nonlinearity (DNL) and integral nonlinearity (INL) are specified at +/- 1 LSB. The component consumes 11.5 mW of power and functions reliably across a temperature range from -40°C to +125°C.

Analog To Digital Converters (ADC) Feature Summary

• Integrates a 16-channel multiplexer with a built-in sample-and-hold circuit for sequential data acquisition.
• Supports zero-latency operation with a high-speed 20 MHz serial interface compatible with standard SPI protocols.
• Enables direct interfacing with CMOS digital hosts through a wide 1.7 V to 5.25 V I/O supply range.
• Offers software-selectable unipolar input ranges of 0 V to 2.5 V or 0 V to 5 V.

Analog To Digital Converters (ADC) Applications

• Programmable Logic Controllers (PLC) and Industrial PC (IPC) systems
• Battery-powered monitoring devices and isolated power supply applications
• Medical instrumentation requiring low-power analog-to-digital conversion

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'RHBT' corresponds to the 32-pin VQFN package when sourcing. Confirm RoHS compliance status and humidity sensitivity handling requirements during storage. Ensure the external reference voltage matches the system design specifications, as the device requires an external reference source rather than an internal one.

Analog To Digital Converters (ADC) Selection Notes

Select this component for designs requiring multiple single-ended inputs with moderate resolution and speed. The 12-bit resolution and 1 MSPS sampling rate suit general-purpose data acquisition tasks. Consider the TSSOP-38 variants if surface area is constrained differently, but verify pin compatibility. The wide operating temperature range supports industrial environments without additional thermal management.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS795x family of multi-channel ADCs, which also includes variants like the ADS7953SDBTR in a TSSOP-38 package. The SRHBT designation specifically identifies the QFP/VQFN form factor within the series. Other family members offer different channel counts such as 4, 8, or 12 channels while maintaining similar performance characteristics.

Analog To Digital Converters (ADC) Replacement Considerations

ADS7953SDBTR: Pin-compatible alternative in TSSOP-38 package.

Analog To Digital Converters (ADC) FAQ

What is the maximum serial clock frequency supported by the ADS7953SRHBT?

The device supports a serial interface clock frequency of up to 20 MHz.

Does the ADS7953SRHBT have an internal voltage reference?

No, the ADS7953SRHBT requires an external voltage reference, typically around 2.51 V.

What input configurations are supported by this ADC?

The device supports single-ended inputs with software-selectable ranges of 0 V to 2.5 V or 0 V to 5 V.