1FEATURES
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

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 closed-loop
control applications in the industrial process control
market and high-resolution applications in the test
and measurement market. It is also ideal for remote
applications, battery-powered instruments, and
isolated systems. The DAC1220 is available in an
SSOP-16 package.