The AD5445 is CMOS 12-bit digital-to-analog converters (DACs), respectively. These devices operate from a 2.5 V to 5.5 V power supply, making them suitable for battery-powered applications and many other applications. These DACs utilize data readback, allowing the user to read the contents of the DAC register via the DB pins. On power-up, the internal register and latches are filled with 0s and the DAC outputs are at zero scale.
As a result of manufacturing with a CMOS submicron process, they offer excellent 4-quadrant multiplication characteristics, with large signal multiplying bandwidths of up to 10 MHz.
The applied external reference input voltage (VREF) determines the full-scale output current. An integrated feedback resistor (RFB) provides temperature tracking and full-scale voltage output when combined with an external I-to-V precision amplifier.
- 12-bit current output DACs
- 2.5 V to 5.5 V supply operation
- Fast parallel interface (17 ns write cycle)
- Update rate of 20.4 MSPS
- INL of ±1 LSB for 12-bit DAC
- 10 MHz multiplying bandwidth
- ±10 V reference input
- Extended temperature range:–40°C to +125°C
- 20-lead TSSOP and chip scale (4 mm × 4 mm) packages
- Guaranteed monotonic
- 4-quadrant multiplication
- Power-on reset with brownout detection
- Readback function
- 0.4µA typical power consumption
- Applications
- Portable battery-powered applications
- Waveform generators
- Analog processing
- Instrumentation applications
- Programmable amplifiers and attenuators
- Digitally controlled calibration
- Programmable filters and oscillators
- Composite video
- Ultrasound
- Gain, offset, and voltage trimming
