DAC161P997CISQX

The DAC161P997CISQX from Texas Instruments is a 16-bit Sigma-Delta digital-to-analog converter (DAC) specifically designed for transmitting analog output current over industry-standard 4-20 mA current loops. This special-function DAC features a single-wire interface (SWIF) with handshake capabilities, enabling digital data transmission without loss of fidelity. It operates with a low power consumption of typically 0.5 mW and supports an extended operating temperature range from -40°C to 105°C.

Key electrical specifications include a 16-bit resolution and a buffered current output. The device boasts a maximum Integral Non-Linearity (INL) of ±9 LSB, with specific INL values of ±3.3/–2.1 µA (Max). It requires an external reference and utilizes a Delta-Sigma architecture. The total supply current is a maximum of 190 µA.

Packaged in a compact WQFN-16 (4mm x 4mm) with a 0.5mm pitch, the DAC161P997CISQX is suitable for space-constrained applications. It offers features like pin-programmable power-up conditions, self-adjustment to input data rate, loop error detection, and reporting. The device also includes programmable output current error levels and requires no external precision components, simplifying integration. Its simple interface to HART modulators makes it ideal for industrial process control, actuator control, factory automation, building automation, precision instruments, data acquisition systems, and test systems.

Additional performance characteristics include an output current temperature coefficient (TempCo) of 29 ppmFS/°C (Max) and a long-term output current drift of 90 ppmFS (Typ).