ADS7815U/1K – TEXAS INSTRUMENTS

The ADS7815U/1K is a 12-bit, successive-approximation-register (SAR) analog-to-digital converter (ADC) from Texas Instruments, packaged in a 16-pin TSSOP (Thin Shrink Small Outline Package). Operating from a single 2.7V to 5.5V supply, it features a low power consumption of typically 1.5mA. Its input voltage range spans 0V to VREF, with VREF typically set between 2.5V and 5V, allowing for flexible scaling. The device boasts a maximum conversion time of 1µs and incorporates an internal clock, eliminating the need for external clock circuitry, simplifying design. The ADS7815U/1K outputs data via a 3-wire serial interface (SPI), compatible with standard microcontroller peripherals. Its low noise and high accuracy make it suitable for applications requiring precise analog signal acquisition, such as industrial process control, sensor interfacing (particularly those with low-level signals), and data acquisition systems where high sample rates are not critical. The single-supply operation and compact package size provide design advantages in space-constrained portable or battery-powered applications. Note the ‘1K’ suffix denotes a specific manufacturing revision or batch, potentially impacting minor electrical characteristics; always consult the latest datasheet.