8-Bit, High Bandwidth
Multiplying DAC with Serial Interface
2.5 V to 5.5 V supply operation
50 MHz serial interface
2.47 MSPS update rate
INL of ±0.25 LSB
10 MHz multiplying bandwidth
±10 V reference input
Low glitch energy: <2 nV-s
Extended temperature range: −40°C to +125°C
10-lead MSOP package
Power-on reset with brownout detection
The AD54251 is a CMOS, 8-bit, current output digital-to-analog
converter that operates from a 2.5 V to 5.5 V power supply,
making it suitable for battery-powered applications and many
This DAC utilizes a double buffered, 3-wire serial interface that
is compatible with SPI®, QSPI™, MICROWIRE™, and most DSP
interface standards. An LDAC pin is also provided, which
allows simultaneous updates in a multi-DAC configuration. On
power-up, the internal shift register and latches are filled with
0s and the DAC outputs are 0 V.
As a result of manufacturing on a CMOS submicron process,
0.4 µA typical power consumption
this DAC offers excellent 4-quadrant multiplication charac-
teristics with large signal multiplying bandwidths of 10 MHz.
Portable battery-powered applications
Programmable amplifiers and attenuators
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.
The AD5425 is available in a small, 10-lead MSOP package.
Digitally controlled calibration
Programmable filters and oscillators
Gain, offset, and voltage trimming
FUNCTIONAL BLOCK DIAGRAM
CONTROL LOGIC AND
INPUT SHIFT REGISTER
1 U.S. Patent No. 5,969,657.
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