ADS7953SBRHBT

The ADS7953SBRHBT is a precision 12-bit analog-to-digital converter (ADC) from Texas Instruments, designed for multichannel data acquisition. It samples at 1 MSPS and provides 16 single-ended input channels through an internal multiplexer, with a successive approximation register (SAR) architecture and inherent sample-and-hold circuit. The device interfaces to microcontrollers and digital systems via a 20-MHz SPI serial interface, and requires an external voltage reference.

Key specifications include an analog supply range of 2.7 V to 5.25 V and a separate I/O supply range of 1.7 V to 5.25 V, allowing flexible voltage level translation. The converter supports software-selectable unipolar input ranges of 0 to VREF and 0 to 2×VREF. Typical power dissipation is 14.5 mW at 5 V analog supply and 1 MSPS, with a power-down current of 1 µA, making it suited for battery-powered and isolated power-supply applications.

The device is offered in a surface-mount 32-pin VQFN (5x5 mm) package with exposed pad, and it operates over the industrial temperature range of -40°C to 125°C. The ADS7953 is part of the ADS79xx pin-compatible family, which includes 12-, 10-, and 8-bit versions with 4, 8, 12, or 16 channels, allowing scalability across designs without layout changes.

This ADC is appropriate for precision sensor monitoring, industrial process control, and portable instrumentation where low power and multiple input channels are required.