| Resolution (Bits) | 20 |
| Number of DAC channels (#) | 1 |
| Interface type | SPI |
| Output type | Unbuffered Voltage |
| Settling time (μs) | 2000 |
| Features | On-chip Offset and Gain Calibration |
| Reference type | Ext |
| Architecture | Delta-Sigma |
| Rating | Catalog |
| Output range (Max) (mA/V) | 5.5 |
| Output range (Min) (mA/V) | 0 |
| Operating temperature range (C) | -40 to 85 |
- 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
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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.