GENERAL DESCRIPTION

The AD5424/AD5433/AD54451 are CMOS 8-, 10-, and 12-bit current output 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.

FEATURES

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

8-, 10-, and 12-bit current output DACs

Upgrades to AD7524/AD7533/AD7545

Pin-compatible 8-, 10-, and 12-bit DACs in chip scale

Guaranteed monotonic

4-quadrant multiplication

Power-on reset with brownout detection

Readback function

0.4 μA 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