DAC1220

DAC1220 DAC1220 www.ti.com...................................................................................................................................... SBAS082G – FEBRUARY 1998 – REVISED SEPTEMBER 2009 20-Bit, Low-Power Digital-to-Analog Converter Check for Samples: DAC1220 FEATURES 1 2 20-Bit Monotonicity Ensured Over –40°C to +85°C Low Power: 2.5mW Voltage Output Settling Time: 2ms to 0.012% Maximum Linearity Error: ±0.0015% On-Chip Calibration APPLICATIONS Process Control ATE Pin Electronics Closed-Loop Servo Control Smart Transmitters Portable Instruments XIN XOUT VREF DESCRIPTION The DAC1220 is a 20-bit digital-to-analog (D/A) converter offering 20-bit monotonic performance over the specified temperature range. It utilizes delta-sigma technology to achieve inherently linear performance in a small package at very low power. The resolution of the device can be programmed to 20 bits for Full-Scale, settling to 0.003% within 15ms typical, or 16 bits for Full-Scale, settling to 0.012% within 2ms max. The output range is two times the external reference voltage. On-chip calibration circuitry dramatically reduces low offset and gain errors. The DAC1220 features a synchronous serial interface; in single-converter applications, the serial interface can be accomplished with just two wires, allowing low-cost isolation. For multiple converters, a CS signal allows for selection of the appropriate D/A converter. The DAC1220 has been designed for close...