DAC7631EB1K BURR-BROWN [Burr-Brown Corporation], DAC7631EB1K Datasheet - Page 15

• Manufacturer Part Number: DAC7631EB1K
• Description: Serial Input, 16-Bit, Voltage Output DIGITAL-TO-ANALOG CONVERTER
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

FIGURE 10. Single-supply Buffered V
FIGURE 12. Low cost Single-supply Configuration.
Data is shifted into the device through the SDI and CLK pins
and arrives in a shift register. Once all 16 bits have been
transferred, the LOAD pin, which is level-sensitive, should
be brought low to latch the data into a buffer register called
the DAC input register. To latch the new data into the DAC
itself, the LDAC pin, which is edge-sensitive, must be
brought high. When this is done, the DAC will assume the
new value and the output voltage will change (provided that
FIGURE 11. Linearity and Differential Error Curves for
–0.5
–1.0
–1.5
–0.5
–1.0
–1.5
–2.0
2.5
2.0
1.5
1.0
0.5
2.0
1.5
1.0
0.5
0
0
0000
H
2000
Figure 10.
+2.5V
DIFFERENTIAL LINEARITY ERROR vs CODE
H
4000
+V
Serial Data Out
LINEARITY ERROR AND
H
Serial Data In
6000
Chip Select
(DAC A, +25 C)
Digital Input Code
H
Clock
+2.5V
8000
H
OPA2350
A000
+V
+V
H
REF
C000
H.
H
10
1
2
3
4
5
6
7
8
9
E000
V
V
V
V
DGND
V
SDO
SDI
CLK
CS
REF
REF
REF
REF
CC
H
2200pF
H
H Sense
L
L Sense
FFFF
H
DAC7631
15
100
V
the new value is different from the old one). Note that
settling time is measured from the time that the LDAC pin
is brought high, since the device’s output does not begin to
change until then.
The DAC7631’s double-buffering scheme allows the device
to be updated through the serial interface without disturbing
the voltage on the output pin. It also allows the user to use
separate logic for driving the serial input and triggering
FIGURE 13. Linearity and Differential Error Curves for
OUT
RSTSEL
AGND
Sense
LOAD
LDAC
1000pF
V
RST
V
V
OUT
NC
CC
–0.5
–1.0
–1.5
–2.0
SS
–0.5
–1.0
–1.5
–2.0
–2.5
2.0
1.5
1.0
0.5
2.5
2.0
1.5
1.0
0.5
0
0
0000
20
19
18
17
16
15
14
13
12
11
H
2000
Figure 12.
DIFFERENTIAL LINEARITY ERROR vs CODE
H
V
OUT
4000
0.1 F
Reset DAC Registers
Load DAC Registers
Load
LINEARITY ERROR AND
H
1
2
3
4
6000
Digital Input Code
(DAC A, +25 C)
V
V
V
V
+
H
REF
REF
REF
REF
1 F
8000
DAC7631
H
H Sense
L
L Sense
+5V
H
DAC7631
A000
H
C000
H
E000
H
FFFF
H
®