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AD5332BRU bảng dữ liệu(PDF) 1 Page - Analog Devices

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Giải thích chi tiết về linh kiện  2.5 V to 5.5 V, 230 muA, Parallel Interface Dual Voltage-Output 8-/10-/12-Bit DACs
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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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
AD5332/AD5333/AD5342/AD5343*
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2000
2.5 V to 5.5 V, 230 A, Parallel Interface
Dual Voltage-Output 8-/10-/12-Bit DACs
AD5332 FUNCTIONAL BLOCK DIAGRAM
(Other Diagrams Inside)
POWER-ON
RESET
DAC
REGISTER
DAC
REGISTER
INPUT
REGISTER
INPUT
REGISTER
INTER-
FACE
LOGIC
DB7
DB0
CS
WR
A0
CLR
LDAC
.
.
.
VREFA
RESET
VREFB
VOUTA
BUFFER
AD5332
VOUTB
BUFFER
VDD
POWER-DOWN
LOGIC
PD GND
8-BIT
DAC
8-BIT
DAC
FEATURES
AD5332: Dual 8-Bit DAC in 20-Lead TSSOP
AD5333: Dual 10-Bit DAC in 24-Lead TSSOP
AD5342: Dual 12-Bit DAC in 28-Lead TSSOP
AD5343: Dual 12-Bit DAC in 20-Lead TSSOP
Low Power Operation: 230
A @ 3 V, 300
A @ 5 V
via
PD Pin
Power-Down to 80 nA @ 3 V, 200 nA @ 5 V
2.5 V to 5.5 V Power Supply
Double-Buffered Input Logic
Guaranteed Monotonic by Design Over All Codes
Buffered/Unbuffered Reference Input Options
Output Range: 0–VREF or 0–2 VREF
Power-On Reset to Zero Volts
Simultaneous Update of DAC Outputs via
LDAC Pin
Asynchronous
CLR Facility
Low Power Parallel Data Interface
On-Chip Rail-to-Rail Output Buffer Amplifiers
Temperature Range: –40 C to +105 C
APPLICATIONS
Portable Battery-Powered Instruments
Digital Gain and Offset Adjustment
Programmable Voltage and Current Sources
Programmable Attenuators
Industrial Process Control
GENERAL DESCRIPTION
The AD5332/AD5333/AD5342/AD5343 are dual 8-, 10-, and
12-bit DACs. They operate from a 2.5 V to 5.5 V supply con-
suming just 230
µA at 3 V, and feature a power-down pin, PD
that further reduces the current to 80 nA. These devices incor-
porate an on-chip output buffer that can drive the output to
both supply rails, while the AD5333 and AD5342 allow a choice
of buffered or unbuffered reference input.
The AD5332/AD5333/AD5342/AD5343 have a parallel interface.
CS selects the device and data is loaded into the input registers
on the rising edge of WR.
The GAIN pin on the AD5333 and AD5342 allows the output
range to be set at 0 V to VREF or 0 V to 2
× VREF.
Input data to the DACs is double-buffered, allowing simultaneous
update of multiple DACs in a system using the LDAC pin.
An asynchronous CLR input is also provided, which resets the
contents of the Input Register and the DAC Register to all zeros.
These devices also incorporate a power-on reset circuit that ensures
that the DAC output powers on to 0 V and remains there until
valid data is written to the device.
The AD5332/AD5333/AD5342/AD5343 are available in Thin
Shrink Small Outline Packages (TSSOP).
*Protected by U.S. Patent Number 5,969,657
.


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