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AD5546 Datasheet

  • AD5546

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

  • 1469.09KB

  • 18页

  • AD

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Current Output, Parallel Input, 16-/14-Bit
Multiplying DACs with 4-Quadrant Resistors
AD5546/AD5556
FEATURES
16-bit resolution
14-bit resolution
2- or 4-quadrant multiplying DAC
卤1 LSB DNL
卤1 LSB INL or 卤2 LSB INL
Operating supply voltage: 2.7 V to 5.5 V
Low noise: 12 nV/鈭欻z
Low power: I
DD
= 10 碌A
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 卤10 V outputs
2 mA full-scale current 卤20%, with V
REF
= 10 V
Automotive operating temperature: 鈥?0掳C to +125掳C
Compact TSSOP-28 package
FUNCTIONAL BLOCK DIAGRAM
R
1
R
1
R
COM
R
2
REF R
OFS
R
OFS
R
FB
R
FB
I
OUT
V
DD
AD5546/
AD5556
CONTROL
LOGIC
DAC
16/14
DAC
REGISTER
WR
LDAC
DB0鈥揇B15
GND
03810-0-001
POR
MSB
RS
Figure 1. AD5546/AD5556 Simplified Block Diagram
GENERAL DESCRIPTION
The AD5546/AD5556 are precision 16-/14-bit, multiplying, low
power, current output, parallel input D/A converters. They
operate from a single 2.7 V to 5.5 V supply with 卤10 V multi-
plying references for 4-quadrant outputs. Built-in 4-quadrant
resistors facilitate the resistance matching and temperature
tracking that minimize the number of components needed for
multiquadrant applications. The feedback resistor (R
FB
) simpli-
fies the I-V conversion with an external buffer. The AD5546/
AD5556 are packaged in compact TSSOP-28 packages with
operating temperatures from 鈥?0掳C to +125掳C.
APPLICATIONS
Automatic test equipment
Instrumentation
Digitally controlled calibration
Digital waveform generation
5V
2
VIN
U3
+
ADR03
TRIM
VOUT
GND
4
5
6
R1
R1
OP2177
鈥?/div>
C1
鈥揤REF
REF
R2
+VREF
ROF
ROFS
RFB
RFB
C2
U2A
RCOM
5V
VDD
AD5546/AD5556
16/14 DATA
GND
U1
16/14-BIT
IOUT
鈥?/div>
OP2177
+
U2B
VOUT
鈥揤REF TO +VREF
WR LDAC RS
WR
LDAC
RS
MSB
MSB
Figure 2. 16-/14-Bit, 4-Quadrant Multiplying DAC with a Minimum of External Components
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.
03810-0-002

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