Four 16-bit channels on one SPI bus
The Texas Instruments DAC7634EB packs four independent 16-bit voltage-output DACs into a single 48-SSOP package, each channel addressed over a shared SPI interface. The R-2R architecture delivers a buffered voltage output with a settling time of 10 µs, suitable for multi-channel industrial control loops, programmable voltage references, and automated test equipment where board space is tight and channel count drives the BOM.
Supply rails and temperature range
Analog section runs on ±5 V, the digital core on a separate 5 V supply. That split-rail requirement is the main PSU constraint — the analog rail needs a bipolar supply, so a single +5 V rail won't cut it. The -40°C to 85°C operating range covers factory-floor cabinets, outdoor telecom shelters, and engine-bay-adjacent enclosures without stepping up to a military-grade part.
Linearity and interface
INL is ±2 LSB, DNL ±1 LSB — typical for a 16-bit R-2R DAC and sufficient for most closed-loop analog outputs without external calibration. The SPI interface uses an external reference, so the reference voltage directly sets the output span; pick a low-drift reference if the application demands better than 16-bit accuracy over temperature.
Active and available
Lifecycle status is Active and ROHS3 compliant. No end-of-life notice or last-time-buy window on this line. For a precision quad DAC in a 48-SSOP footprint, it's a current-production part that can be specified into new designs without obsolescence risk.