DAC7631EB1K BURR-BROWN [Burr-Brown Corporation], DAC7631EB1K Datasheet - Page 18

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

Figure 16 shows a DAC7631 in a 4mA to 20mA current
output configuration. The output current can be determined
by Equation 3:
FIGURE 16. 4-to-20mA Digitally Controlled Current Source (1/2 DAC7631).
I
OUT
Serial Data Out
Serial Data In
Chip Select
®
DAC7631
2 5
Clock
.
V
125
– .
0 5
V
•
10
1
2
3
4
5
6
7
8
9
65 536
V
V
V
V
DGND
V
SDO
SDI
CLK
CS
,
N
REF
REF
REF
REF
DD
1000pF
1000pF
H
H Sense
L
L Sense
100
100
DAC7631
125
0 5
.
V
V
OUT
2200pF
2200pF
RSTSEL
(3)
AGND
Sense
LOAD
LDAC
V
RST
V
V
OUT
NC
CC
SS
18
20
19
18
17
16
15
14
13
12
11
At full-scale, the output current is 16mA, plus the 4mA, for
the zero current. At zero scale the output current is the offset
current of 4mA (0.5V/125 ).
OPA2350
+V
0.1 F
Reset DAC Registers
Load DAC Registers
Load
+
1 F
+5V
20k
80k
+V
+2.5V
V
125
PROGRAMMED
I
OUT