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AD5547 Datasheet

  • AD5547

  • Dual Current Output, Parallel Input, 16-/14-Bit Multiplying ...

  • 1456.17KB

  • 22頁

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Dual Current Output, Parallel Input, 16-/14-Bit
Multiplying DACs with 4-Quadrant Resistors
AD5547/AD5557
FEATURES
Dual channel
16-bit resolution: AD5547
14-bit resolution: AD5557
2- or 4-quadrant, 4 MHz BW multiplying DAC
鹵1 LSB DNL
鹵1 LSB INL for AD5557, 鹵2 LSB INL for AD5547
Operating supply voltage: 2.7 V to 5.5 V
Low noise: 12 nV/鈭欻z
Low power: I
DD
= 10 碌A(chǔ) max
0.5 碌s settling time
Built-in R
FB
facilitates current-to-voltage conversion
Built-in 4-quadrant resistors allow 0 V to 鈥?0 V, 0 V to +10 V,
or 鹵10 V outputs
2 mA full-scale current 鹵 20%, with V
REF
= 10 V
Extended automotive operating temperature range:
鈥?0擄C to +125擄C
Selectable zero-scale/midscale power-on presets
Compact TSSOP-38 package
FUNCTIONAL BLOCK DIAGRAM
R
1A
R
COMA
V
REFA
R
OFSA
R
FBA
V
DD
D0鈥揇15
(AD5547)
D0鈥揇13
(AD5557)
D0..D15
OR
D0..D13
INPUT
REGISTER
RS
DAC A
REGISTER
RS
DAC A
I
OUTA
AGNDA
AGNDB
INPUT
REGISTER
RS
DAC B
REGISTER
RS
DAC B
I
OUTB
R
FBB
R
OFSB
WR
A0, A1
DAC A
DAC B
ADDR
DECODE
AD5547/AD5557
LDAC
R
1B
R
COMB
DGND
RS MSB
V
REFB
Figure 1.
APPLICATIONS
Automatic test equipment
Instrumentation
Digitally controlled calibration
Digital waveform generation
GENERAL DESCRIPTION
The AD5547/AD5557 are dual precision, 16-/14-bit,
multiplying, low power, current-output, parallel input, digital-
to-analog converters. They are designed to operate from single
+5 V supply with 鹵10 V multiplying references for 4-quadrant
outputs with up to 4 MHz bandwidth.
VREF
U1
鈥揤REF
The built-in 4-quadrant resistors facilitate resistance matching
and temperature tracking, which minimize the numbers of
components needed for multiquadrant applications. In addition,
the feedback resistor (R
FB
) simplifies the I-V conversion with an
external buffer.
The AD5547/AD5557 are available in a compact TSSOP-38
package and operate at the extended automotive temperature
range of 鈥?0擄C to +125擄C.
C1
R
1A
R1
16/14 DATA
R
COMA
R2
V
REFA
R
OFSA
ROFS
16-/14-BIT
DAC A
R
FBA
RFB
IOUTA
AGNDA
C2
U2
VOUTA
鈥揤REF TO +VREF
AD5547/AD5557
POWER-ON
RESET
WR LDAC RS
MSB A0, A1
2
WR
LDAC
RS
MSB
A0, A1
(ONE CHANNEL SHOWN ONLY)
Figure 2. 16/14-Bit 4-Quadrant Multiplying DAC with Minimum of External Components (Only One Channel Shown)
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.
Specifications subject to change without notice. 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 2004 Analog Devices, Inc. All rights reserved.
04452-0-002
04452-0-013
POWER
ON
RESET

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