Current Output/
Serial Input, 16-/14-Bit DAC
AD5543/AD5553
FEATURES
FUNCTIONAꢀ BꢀOCK DIAGRAM
16-bit resolution AD5543
14-bit resolution AD5553
1 ꢀSB DNꢀ
AD5543/AD5553
R
FB
V
DD
1 ꢀSB INꢀ
ꢀow noise: 12 nV/√Hz
ꢀow power: IDD = 10 μA
0.5 μs settling time
4Q multiplying reference input
2 mA full-scale current 20ꢁ, with VREF = 10 V
Built-in RFB facilitates voltage conversion
3-wire interface
I
V
DAC
OUT
REF
CS
16 OR 14
CONTROL
LOGIC
DAC
REGISTER
16 OR 14
CLK
SDI
GND
16-BIT/14-BIT SHIFT
REGISTER
Ultracompact MSOP-8 and SOIC-8 packages
APPꢀICATIONS
Figure 1.
Automatic test equipment
Instrumentation
1.0
0.8
Digitally controlled calibration
Industrial control PꢀCs
0.6
0.4
GENERAꢀ DESCRIPTION
0.2
The AD5543/AD5553 are precision 16-/14-bit, low power,
current output, small form factor digital-to-analog converters
(DAC). They are designed to operate from a single 5 V supply
with a 10 V multiplying reference.
0
–0.2
–0.4
–0.6
–0.8
–1.0
The applied external reference, VREF, determines the full-scale
output current. An internal feedback resistor (RFB) facilitates the
R-2R and temperature tracking for voltage conversion when
combined with an external op amp.
CODE
A serial-data interface offers high speed, 3-wire microcontroller-
compatible inputs using serial data in (SDI), clock (CLK), and
Figure 2. Integral Nonlinearity
REF LEVEL /DIV
0.000dB 12.000dB
MARKER 4 311 677.200Hz
MAG (A/R) –2.939dB
CS
chip select ( ).
0xFFFF
0x8000
0x4000
0x2000
0x1000
0x0800
0x0400
0x0200
0x0100
0x0080
0x0040
0x0020
0x0010
0x0008
0x0004
0x0002
0x0001
The AD5543/AD5553 are packaged in ultracompact (3 mm ×
4.7 mm) MSOP-8 and SOIC-8 packages.
0x0000
10
100
1k
10k
100k
1M
10M
START 10.000Hz
STOP 50 000 000.000Hz
Figure 3. Reference Multiplying Bandwidth
Rev. B
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