8-/10-/12-Bit High Bandwidth
Multiplying DACs with Serial Interface
3.0 V to 5.5 V Supply Operation
50 MHz Serial Interface
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
Pin Compatible 8-, 10-, and 12-Bit Current
Power-On Reset with Brownout Detection
0.4 A Typical Power Consumption
Portable Battery-Powered Applications
Programmable Amplifiers and Attenuators
Digitally Controlled Calibration
Programmable Filters and Oscillators
Gain, Offset, and Voltage Trimming
FUNCTIONAL BLOCK DIAGRAM
CONTROL LOGIC AND
INPUT SHIFT REGISTER
The AD5426/AD5432/AD5443 are CMOS 8-, 10-, and 12-bit
current output digital-to-analog converters, respectively.
These devices operate from a 3.0 V to 5.5 V power supply,
making them suited to battery-powered applications and many
These DACs utilize double buffered 3-wire serial interface that
is compatible with SPI
, QSPI™, MICROWIRE™, and most
DSP interface standards. In addition, a serial data out pin (SDO)
allows for daisy-chaining when multiple packages are used. Data
readback allows the user to read the contents of the DAC register
via the SDO pin. On power-up, the internal shift register and
latches are filled with 0s and the DAC outputs are at zero scale.
As a result of manufacture on a CMOS submicron process, they
offer excellent 4-quadrant multiplication characteristics, with
large signal multiplying bandwidths of 10 MHz.
The applied external reference input voltage (V
the full-scale output current. An integrated feedback resistor (R
provides temperature tracking and full-scale voltage output when
combined with an external current to voltage precision amplifier.
The AD5426/AD5432/AD5443 DACs are available in small
10-lead MSOP packages.
Patent No. 5,689,257
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