Quad, Current-Output,
Serial-Input 16-Bit DAC
Enhanced Product
AD5544-EP
FEATURES
FUNCTIONAL BLOCK DIAGRAM
2 mA full-scale current 20%, with VREF
0.9 µs settling time to 0.1%
12 MHz multiplying bandwidth
Midscale glitch of −1 nV-sec
= 10 V
V
DD
D0
D1
D2
D3
D4
D5
D6
D7
D8
R
I
A
A
FB
SDO
INPUT
REGISTER
DAC A
REGISTER
DAC A
OUT
R
R
R
R
R
R
R
R
Midscale or zero-scale reset
A
A
GND
4 separate, 4-quadrant multiplying reference inputs
SPI-compatible, 3-wire interface
Double-buffered registers enable
Simultaneous multichannel change
Internal power-on reset
R
B
FB
INPUT
REGISTER
DAC B
REGISTER
16
D9
I
B
DAC B
DAC C
OUT
D10
D11
D12
D13
D14
D15
A0
A
B
GND
R
I
C
C
FB
INPUT
REGISTER
DAC C
REGISTER
OUT
SDI
A1
Compact 28-lead SSOP
A
C
GND
CS
R
I
D
FB
CLK
EN
ENHANCED PRODUCT FEATURES
INPUT
REGISTER
DAC D
REGISTER
D
DAC D
OUT
DAC
A
B
C
D
A
D
Supports defense and aerospace applications (AQEC)
Military temperature range (−55°C to +125°C)
Controlled manufacturing baseline
1 assembly/test site
GND
2:4
AD5544-EP
POWER-ON
RESET
DECODE
A
F
GND
DGND
RS
MSB
LDAC
V
SS
1 fabrication site
Figure 1.
Enhanced product change notification
Qualification data available on request
APPLICATIONS
Automatic test equipment
Instrumentation
Digitally controlled calibration
GENERAL DESCRIPTION
packages are used. A common, level-sensitive, load DAC strobe
LDAC
from previously loaded input registers. Additionally, an internal
power-on reset forces the output voltage to 0 at system turn-on.
The AD5544-EP quad, 16-bit, current output, digital-to-analog
converter (DAC) is designed to operate from a 2.7 V to
5.5 V supply range.
(
) input allows the simultaneous update of all DAC outputs
The applied external reference input voltage (VREFx) determines
the full-scale output current. Integrated feedback resistors (RFB)
provide temperature-tracking, full-scale voltage outputs when
combined with an external I-to-V precision amplifier.
RS
The MSB pin allows system reset assertion ( ) to force all registers
to zero code when MSB = 0 or to half-scale code when MSB = 1.
The AD5544-EP is packaged in the compact 28-lead SSOP.
Additional application and technical information can be found
in the AD5544 data sheet.
A double-buffered serial data interface offers high speed, 3-wire,
SPI- and microcontroller-compatible inputs using serial data in
CS
(SDI), a chip select ( ), and clock (CLK) signals. In addition, a
serial data out pin (SDO) allows for daisy chaining when multiple
Rev. 0
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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rightsof third parties that may result fromits use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
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