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AD8021 Datenblatt(PDF) 1 Page - Analog Devices

Teilenummer AD8021
Bauteilbeschribung  Dual-Current Output, Parallel Input, 16-/14-Bit Multiplying DACs with 4-Quadrant Resistors
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Direct Link  http://www.analog.com
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Dual-Current Output, Parallel Input, 16-/14-Bit
Multiplying DACs with 4-Quadrant Resistors
Data Sheet
AD5547/AD5557
Rev. D
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2004–2012 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
FEATURES
Dual channel
16-bit resolution: AD5547
14-bit resolution: AD5557
2- or 4-quadrant, 6.8 MHz BW multiplying DAC
±1 LSB DNL
±1 LSB INL
Operating supply voltage: 2.7 V to 5.5 V
Low noise: 12 nV/√Hz
Low power: I
DD = 10 µA max
0.5 µs settling time
Built-in R
FB facilitates current-to-voltage conversion
Built-in 4-quadrant resistors allow 0 V to –10 V, 0 V to +10 V,
or ±10 V outputs
2 mA full-scale current ± 20%, with V
REF = 10 V
Extended automotive operating temperature range
−40°C to +125°C
Selectable zero-scale/midscale power-on presets
Compact 38-lead TSSOP package
APPLICATIONS
Automatic test equipment
Instrumentation
Digitally controlled calibration
Digital waveform generation
FUNCTIONAL BLOCK DIAGRAM
DAC A
D0..D15
OR
D0..D13
DAC A
DAC B
ADDR
DECODE
INPUT
REGISTER
RS
DAC A
REGISTER
RS
DAC B
REGISTER
RS
POWER
ON
RESET
VDD
RCOMB
RCOMA
R1A
ROFSA
VREFA
R1B
ROFSB
RFBA
AGNDA
AGNDB
VREFB
IOUTA
RFBB
IOUTB
D0 TO D15
(AD5547)
D0 TO D13
(AD5557)
A0, A1
MSB
LDAC
DGND
WR
RS
INPUT
REGISTER
RS
DAC B
AD5547/AD5557
Figure 1.
GENERAL DESCRIPTION
The AD5547/AD5557 are dual precision, 16-/14-bit, multiplying,
low power, current-output, parallel input, digital-to-analog
converters (DACs). They are designed to operate from single
+5 V supply with ±10 V multiplying references for 4-quadrant
outputs with 6.8 MHz bandwidth.
The built-in, 4-quadrant resistors facilitate resistance matching
and temperature tracking, which minimize the number of
components needed for multiquadrant applications. In addition,
the feedback resistor (RFB) simplifies the I-to-V conversion with
an external buffer.
The AD5547/AD5557 are available in a compact, 38-lead TSSOP
package and operate at the extended automotive temperature
range of −40°C to +125°C.
VREF
–VREF
–VREF TO +VREF
U1
C1
R1A
16/14 DATA
RCOMA
R1
R2
ROFSA
RFBA
C2
RFB
ROFS
16-/14-BIT
DAC A
MSB A0, A1
2
POWER-ON
RESET
AD5547/AD5557
IOUTA
AGNDA
(ONE CHANNEL SHOWN ONLY)
U2
VOUTA
VREFA
MSB
A0, A1
LDAC
WR
RS
WR
RS
LDAC
Figure 2. 16-/14-Bit 4-Quadrant Multiplying DAC with Minimum of External Components (Only One Channel Is Shown)


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