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AD5328 Datasheet

  • AD5328

  • 2.5 V to 5.5 V Octal Voltage Output 8-/10-/12-Bit DACs in 16...

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2.5 V to 5.5 V Octal Voltage Output
8-/10-/12-Bit DACs in 16-Lead TSSOP
AD5308/AD5318/AD5328
*
FEATURES
AD5308: 8 Buffered 8-Bit DACs in 16-Lead TSSOP
A Version: 1 LSB INL, B Version: 0.75 LSB INL
AD5318: 8 Buffered 10-Bit DACs in 16-Lead TSSOP
A Version: 4 LSB INL, B Version: 3 LSB INL
AD5328: 8 Buffered 12-Bit DACs in 16-Lead TSSOP
A Version: 16 LSB INL, B Version: 12 LSB INL
Low Power Operation: 0.7 mA @ 3 V
Guaranteed Monotonic by Design over All Codes
Power-Down to 120 nA @ 3 V, 400 nA @ 5 V
Double-Buffered Input Logic
Buffered/Unbuffered/V
DD
Reference Input Options
Output Range: 0 V to V
REF
or 0 V to 2 V
REF
Power-On Reset to 0 V
Programmability
Individual Channel Power-Down
Simultaneous Update of Outputs (LDAC)
Low Power, SPI
廬
, QSPI鈩? MICROWIRE鈩? and DSP
Compatible 3-Wire Serial Interface
On-Chip Rail-to-Rail Output Buffer Amplifiers
Temperature Range 鈥?0 C to +105 C
APPLICATIONS
Portable Battery-Powered Instruments
Digital Gain and Offset Adjustment
Programmable Voltage and Current Sources
Optical Networking
Automatic Test Equipment
Mobile Communications
Programmable Attenuators
Industrial Process Control
GENERAL DESCRIPTION
The AD5308/AD5318/AD5328 are octal 8-, 10-, and 12-bit
buffered voltage output DACs in a 16-lead TSSOP. They operate
from a single 2.5 V to 5.5 V supply, consuming 0.7 mA typ at 3 V.
Their on-chip output amplifiers allow the outputs to swing
rail-to-rail with a slew rate of 0.7 V/碌s. The AD5308/AD5318/
AD5328 use a versatile 3-wire serial interface that operates at
clock rates up to 30 MHz and is compatible with standard
SPI, QSPI, MICROWIRE, and DSP interface standards.
The references for the eight DACs are derived from two reference
pins (one per DAC quad). These reference inputs can be
configured as buffered, unbuffered, or V
DD
inputs. The parts
incorporate a power-on reset circuit, which ensures that the DAC
outputs power up to 0 V and remain there until a valid write to
the device takes place. The outputs of all DACs may be updated
simultaneously using the asynchronous
LDAC
input. The parts
contain a power-down feature that reduces the current consump-
tion of the devices to 400 nA at 5 V (120 nA at 3 V). The eight
channels of the DAC may be powered down individually.
All three parts are offered in the same pinout, which allows
users to select the resolution appropriate for their application
without redesigning their circuit board.
FUNCTIONAL BLOCK DIAGRAM
V
DD
V
REF
ABCD
V
DD
GAIN-SELECT
LOGIC
BUFFER
LDAC
INPUT
REGISTER
INPUT
REGISTER
INPUT
REGISTER
INPUT
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
STRING
DAC A
STRING
DAC B
STRING
DAC C
STRING
DAC D
STRING
DAC E
STRING
DAC F
STRING
DAC G
STRING
DAC H
V
OUT
A
V
OUT
B
V
OUT
C
V
OUT
D
V
OUT
E
V
OUT
F
V
OUT
G
V
OUT
H
BUFFER
BUFFER
SCLK
INTERFACE
LOGIC
BUFFER
SYNC
INPUT
REGISTER
INPUT
REGISTER
INPUT
REGISTER
INPUT
REGISTER
BUFFER
DIN
BUFFER
BUFFER
BUFFER
POWER-ON
RESET
LDAC
GAIN-SELECT
LOGIC
V
DD
V
REF
EFGH
POWER-DOWN
LOGIC
GND
*Protected
by U.S.Patent No. 5,969,657; other patents pending.
REV. B
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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