AD5424 Datasheet, PDF (1/24 Pages) Analog Devices – 8-/10-/12-Bit, High Bandwidth, Multiplying DACs with Parallel Interface

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)
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 ␮A 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
FUNCTIONAL BLOCK DIAGRAM
V_DD
AD5424/
AD5433/
AD5445
V_REF
8-/10-/12-BIT
R-2R DAC
R_FB
R
I_OUT1
I_OUT 2
POWER-ON
RESET
DAC REGISTER
CS
R/W
INPUT LATCH
GND
DB0
DB7/DB9/DB11
DATA
INPUTS
GENERAL DESCRIPTION
The AD5424/AD5433/AD5445 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 suited to 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 manufacture on 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 (V_REF) determines
the full-scale output current. An integrated feedback resistor
(R_FB) provides temperature tracking and full-scale voltage output
when combined with an external I-to-V precision amplifier.
While these devices are upgrades of AD7524/AD7533/AD7545
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 avail-
able in small 20-lead LFCSP and TSSOP packages.
*U.S. Patent No. 5,689,257
REV. 0
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