AD5424_15 Datasheet, PDF (1/29 Pages) Analog Devices – 8-/10-/12-Bit, High Bandwidth Multiplying DACs with Parallel Interface

Data Sheet
8-/10-/12-Bit, High Bandwidth
Multiplying DACs with Parallel Interface
AD5424/AD5433/AD5445
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
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.
While these devices are upgrades of the AD5424/AD5433/
AD5445 in multiplying bandwidth performance, they have a
latched interface and cannot be used in transparent mode.
The AD5424 is available in small, 20-lead LFCSP and 16-lead
TSSOP packages, while the AD5433/AD5445 DACs are available
in small, 20-lead LFCSP and TSSOP packages.
The EVAL-AD5445SDZ evaluation board is available for
evaluating DAC performance. For more information, see the
UG-333 evaluation board user guide.
1 _{U.S Patent No. 5,689,257.}
FUNCTIONAL BLOCK DIAGRAM
V_DD
V_REF
AD5424/
AD5433/
AD5445
8-/10-/12-BIT
R-2R DAC
R_FB
R
I_OUT1
I_OUT2
POWER-ON
RESET
DAC REGISTER
CS
INPUT LATCH
R/W
GND
DB0
DB7/DB9/DB11
DATA
INPUTS
Figure 1.
Rev. D
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