AD5545
器件描述：Dual, Current-Output, Serial-Input, 16-/14-Bit DAC
器件厂商：AD [Analog Devices]
文件大小：1419.1KB，共16页
Sponsor by e络盟器件资料摘要：
Dual, Current-Output,
Serial-Input, 16-/14-Bit DAC
AD5545/AD5555
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 companies.
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 © 2003 Analog Devices, Inc. All rights reserved.
FEATURES
16-bit resolution AD5545
14-bit resolution AD5555
±1 LSB DNL monotonic
±2 LSB INL AD5545
2 mA full-scale current ±20%, with VREF = 10 V
0.5 µs settling time
2Q multiplying reference-input 4 MHz BW
Zero or midscale power-up preset
Zero or midscale dynamic reset
3-wire interface
Compact TSSOP-16 package
APPLICATIONS
Automatic test equipment
Instrumentation
Digitally controlled calibration
Industrial control PLCs
Programmable attentuator
PRODUCT OVERVIEW
The AD5545/AD5555 are 16-bit/14-bit, current-output, digital-
to-analog converters designed to operate from a single 5 V
supply with bipolar output up to ±15 V capability.
An external reference is needed to establish the full-scale out-
put-current. An internal feedback resistor (RFB) enhances the
resistance and temperature tracking when combined with an
external op amp to complete the I-to-V conversion.
A serial data interface offers high speed, 3-wire microcontroller
compatible inputs using serial data in (SDI), clock (CLK), and
chip select (CS). Additional LDAC function allows simultane-
ous update operation. The internal reset logic allows power-on
preset and dynamic reset at either zero or midscale, depending
on the state of the MSB pin.
The AD5545/AD5555 are packaged in the compact TSSOP-16
package and can be operated from –40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
AD5545/
AD5555
V
DD
R
FB
A
V
REF
BV
REF
A
I
OUT
A
A
GND
A
SDI
CS
CLK
DGND MSBRS LDAC
DAC A
DAC A
B
D0..DX
EN
R
R
R
R
16 OR 14
ADDR
DECODE
INPUT
REGISTER
POWER-
ON
RESET
INPUT
REGISTER
DAC A
REGISTER
DAC B
REGISTER
R
FB
B
I
OUT
B
A
GND
B
DAC B
02918-0-001
Figure 1.
Serial-Input, 16-/14-Bit DAC
AD5545/AD5555
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 companies.
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 © 2003 Analog Devices, Inc. All rights reserved.
FEATURES
16-bit resolution AD5545
14-bit resolution AD5555
±1 LSB DNL monotonic
±2 LSB INL AD5545
2 mA full-scale current ±20%, with VREF = 10 V
0.5 µs settling time
2Q multiplying reference-input 4 MHz BW
Zero or midscale power-up preset
Zero or midscale dynamic reset
3-wire interface
Compact TSSOP-16 package
APPLICATIONS
Automatic test equipment
Instrumentation
Digitally controlled calibration
Industrial control PLCs
Programmable attentuator
PRODUCT OVERVIEW
The AD5545/AD5555 are 16-bit/14-bit, current-output, digital-
to-analog converters designed to operate from a single 5 V
supply with bipolar output up to ±15 V capability.
An external reference is needed to establish the full-scale out-
put-current. An internal feedback resistor (RFB) enhances the
resistance and temperature tracking when combined with an
external op amp to complete the I-to-V conversion.
A serial data interface offers high speed, 3-wire microcontroller
compatible inputs using serial data in (SDI), clock (CLK), and
chip select (CS). Additional LDAC function allows simultane-
ous update operation. The internal reset logic allows power-on
preset and dynamic reset at either zero or midscale, depending
on the state of the MSB pin.
The AD5545/AD5555 are packaged in the compact TSSOP-16
package and can be operated from –40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
AD5545/
AD5555
V
DD
R
FB
A
V
REF
BV
REF
A
I
OUT
A
A
GND
A
SDI
CS
CLK
DGND MSBRS LDAC
DAC A
DAC A
B
D0..DX
EN
R
R
R
R
16 OR 14
ADDR
DECODE
INPUT
REGISTER
POWER-
ON
RESET
INPUT
REGISTER
DAC A
REGISTER
DAC B
REGISTER
R
FB
B
I
OUT
B
A
GND
B
DAC B
02918-0-001
Figure 1.