AD5443_15 Datasheet, PDF (1/25 Pages) Analog Devices – 8-/10-/12-Bit High Bandwidth Multiplying DACs with Serial Interface

Data Sheet
8-/10-/12-Bit High Bandwidth
Multiplying DACs with Serial Interface
AD5426/AD5432/AD5443
FEATURES
GENERAL DESCRIPTION
2.5 V to 5.5 V supply operation
50 MHz serial interface
10 MHz multiplying bandwidth
2.5 MSPS update rate
INL of ±1 LSB for 12-bit DAC
±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 output DACs
Guaranteed monotonic
4-quadrant multiplication
Power-on reset with brownout detection
Daisy-chain mode
Readback function
0.4 µA typical power consumption
APPLICATIONS
Portable battery-powered applications
Waveform generators
Analog processing
Instrumentation
Programmable amplifiers and attenuators
Digitally controlled calibration
Programmable filters and oscillators
Composite video
Ultrasound
Gain, offset, and voltage trimming
The AD5426/AD5432/AD5443¹ 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 use a 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 manufacturing on a CMOS submicron process,
the parts offer excellent 4-quadrant multiplication characteristics
with large signal multiplying bandwidths of 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 current to voltage precision amplifier.
The AD5426/AD5432/AD5443 DACs are available in small,
10-lead MSOP packages.
The EV-AD5443/46/53SDZ evaluation board is available for
evaluating DAC performance. For more information, see the
UG-327 evaluation board user guide.
FUNCTIONAL BLOCK DIAGRAM
V_DD
V_REF
AD5426/
AD5432/
AD5443
8-/10-/12-BIT
R-2R DAC
R
R_FB
I_OUT1
I_OUT2
POWER-ON
RESET
DAC REGISTER
INPUT LATCH
SYNC
SCLK
SDIN
CONTROL LOGIC AND
INPUT SHIFT REGISTER
SDO
1 _{U.S. Patent No. 5,689,257.}
GND
Figure 1.
Rev. G
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