AD5334 Analog Devices, AD5334 Datasheet - Page 13
AD5334
Manufacturer Part Number
AD5334
Description
Manufacturer
Analog Devices
Datasheet
1.AD5335.pdf
(20 pages)
Specifications of AD5334
Resolution (bits)
8bit
Dac Update Rate
167kSPS
Dac Settling Time
6µs
Max Pos Supply (v)
+5.5V
Single-supply
Yes
Dac Type
Voltage Out
Dac Input Format
Par
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD5334BRUZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
REV. 0
FUNCTIONAL DESCRIPTION
The AD5334/AD5335/AD5336/AD5344 are quad resistor-
string DACs fabricated on a CMOS process with resolutions of
8, 10, 10, and 12 bits, respectively. They are written to using a
parallel interface. They operate from single supplies of 2.5 V to
5.5 V and the output buffer amplifiers offer rail-to-rail output
swing. The gain of the buffer amplifiers in the AD5334 and
AD5336 can be set to 1 or 2 to give an output voltage range of
0 to V
put buffers with unity gain.
The devices have a power-down feature that reduces current
consumption to only 80 nA @ 3 V.
Digital-to-Analog Section
The architecture of one DAC channel consists of a reference
buffer and a resistor-string DAC followed by an output buffer
amplifier. The voltage at the V
voltage for the DAC. Figure 28 shows a block diagram of the
DAC architecture. Since the input coding to the DAC is
straight binary, the ideal output voltage is given by:
Figure 23. I
3 V and V
Figure 26. Full-Scale Error vs. V
–0.1
–0.2
0.4
0.3
0.2
0.1
300
0
REF
0
V
DD
V
T
DD
A
350
or 0 to 2 V
= 25 C
= 3V
DD
= 5V
1
DD
= 5 V
400
Histogram with V
2
V
I
DD
OUT
V
450
REF
REF
– A
3
– V
. The AD5335 and AD5344 have out-
=
500
V
4
REF
V
DD
REF
550
= 5V
×
5
pin provides the reference
2
D
DD
600
N
REF
=
6
×
Gain
Figure 24. AD5344 Major-Code Tran-
sition Glitch Energy
0.923
0.929
0.928
0.927
0.926
0.925
0.924
0.922
0.921
0.920
0.919
Figure 27. DAC-DAC Crosstalk
750ns/DIV
–13–
500ns/DIV
where:
D = decimal equivalent of the binary code which is loaded to
the DAC register:
N = DAC resolution
Gain = Output Amplifier Gain (1 or 2)
0–255 for AD5334 (8 Bits)
0–1023 for AD5335/AD5336 (10 Bits)
0–4095 for AD5344 (12 Bits)
REGISTER
INPUT
AD5334/AD5335/AD5336/AD5344
Figure 28. Single DAC Channel Architecture
REGISTER
DAC
Figure 25. Multiplying Bandwidth
(Small-Signal Frequency Response)
–10
–20
–30
–40
–50
–60
10
0
0.01
RESISTOR
0.1
STRING
V
REF
FREQUENCY – kHz
1
BUFFER AMPLIFIER
10
OUTPUT
GAIN
100
1k
V
OUT
10k