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AD5445 Datasheet

  • AD5445

  • 8-/10-/12-Bit, High Bandwidth, Multiplying DACs with Paralle...

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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 鈥?0 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
GENERAL DESCRIPTION
FUNCTIONAL BLOCK DIAGRAM
V
DD
V
REF
R
8-/10-/12-BIT
R-2R DAC
R
FB
I
OUT
1
I
OUT
2
AD5424/
AD5433/
AD5445
POWER-ON
RESET
DAC REGISTER
CS
R/W
INPUT LATCH
GND
DB0
DATA
INPUTS
DB7/DB9/DB11
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
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
漏 2003 Analog Devices, Inc. All rights reserved.

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