DAC7641Y Burr-Brown Corporation, DAC7641Y Datasheet - Page 11

• Manufacturer Part Number: DAC7641Y
• Description: 16-Bit/ Voltage Output DIGITAL-TO-ANALOG CONVERTER
• Manufacturer: Burr-Brown Corporation

TYPICAL PERFORMANCE CURVES: V
At T
THEORY OF OPERATION
The DAC7641 is a voltage output, 16-bit digital-to-analog
converter (DAC). The architecture is an R-2R ladder con-
figuration with the three MSBs segmented, followed by an
operational amplifier that serves as a buffer (see Figure 1).
The minimum voltage output (zero-scale) and maximum
voltage output (full-scale) are set by the external voltage
FIGURE 1. DAC7641 Architecture.
A
= +25 C, V
2R
DD
= +5V, V
2R
SS
R
= –5V, V
REFH
2R
= +2.5V, V
2R
REFL
OUTPUT VOLTAGE vs SETTLING TIME
= –2.5V, representative unit, unless otherwise specified.
2R
Large-Signal Settling Time: 1V/div
(+2.5V to –2.5V)
Time (2 s/div)
11
2R
Small-Signal Settling Time:
references V
is a 16-bit parallel word and the DAC input register offers a
readback capability. The converters can be powered from
either a single +5V supply or a dual 5V supply. The device
offers a reset function which immediately sets all DAC
output voltages and DAC registers to mid-scale code 8000
or to zero-scale code 0000
basic operation of the DAC7641.
2LSB/div
2R
SS
= –5V
REF
2R
L and V
+5V
LDAC
0
REF
(Cont.)
2R
H, respectively. The digital input
H
. See Figures 2 and 3 for the
DAC7641
V
V
V
V
REF
REF
REF
REF
H
H Sense
L
L Sense
R
F
V
V
OUT
OUT
Sense
H
®