DAC7631EB1K BURR-BROWN [Burr-Brown Corporation], DAC7631EB1K Datasheet - Page 11

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

TYPICAL PERFORMANCE CURVES: V
At T
THEORY OF OPERATION
The DAC7631 is a 16-bit voltage-output Digital-to-Analog
Converter (DAC). The architecture is an R-2R ladder con-
figuration with the three MSB’s segmented, followed by an
operational amplifier that serves as a buffer, as shown in
Figure 1. The minimum voltage output (zero-scale) and
maximum voltage output (full-scale) are set by external
voltage references at V
FIGURE 1. DAC7631 Architecture.
A
= +25 C, V
2R
DD
= V
2R
CC
= +5V, V
R
REF
L and V
SS
= –5V, V
2R
REF
REFH
H, respectively.
= +2.5V, and V
2R
OUTPUT VOLTAGE vs SETTLING TIME
2R
REFL
Large-Signal Settling Time: 1V/div
(+2.5V to –2.5V)
Time (2 s/div)
= –2.5V, representative unit, unless otherwise specified.
11
Small-Signal Settling Time:
2R
The digital input is a 16-bit serial word representing the
16-bit DAC input code, sent MSB first. The DAC7631 can
be powered from either a single +5V supply or a dual 5V
supply. The device offers a reset function which immedi-
ately sets the output voltage and DAC register to mid-scale
code (8000H) or to zero-scale code (0000H). See Figures 2
and 3 for the basic operation of the DAC7631.
2LSB/div
2R
SS
= –5V
2R
+5V
LDAC
0
(Cont.)
2R
DAC7631
V
V
V
V
REF
REF
REF
REF
H
H Sense
L
L Sense
R
F
V
V
OUT
OUT
Sense
®