参数资料
型号: DAC8564ICPWR
厂商: TEXAS INSTRUMENTS INC
元件分类: DAC
英文描述: SERIAL INPUT LOADING, 12 us SETTLING TIME, 16-BIT DAC, PDSO16
封装: GREEN, PLASTIC, TSSOP-16
文件页数: 32/51页
文件大小: 1549K
代理商: DAC8564ICPWR
V
REF
H
V
REF
H
+6V
±5V
-6V
OPA703
DAC8564
10 F
m
0.1 F
m
R
1
10kW
R
2
10kW
3-Wire
SerialInterface
V
OUT
GND
AV
DD
AV
DD
V
L
REF
V
=
O
-
V
REF
D
65536
V
REF
R +R
1
2
R
1
R
2
R
1
V
=
O
- 5V
10
D
65536
+6V
±2.5V
-6V
OPA703
DAC8564
150nF
R
1
10kW
R
2
10kW
3-Wire
SerialInterface
V
OUT
GND
AV
DD
AV
DD
V
REF
H
V
L
REF
SBAS403D
– JUNE 2007 – REVISED MAY 2011
BIPOLAR OPERATION USING THE DAC8564
The
DAC8564
is
designed
for
single-supply
operation, but a bipolar output range is also possible
using the circuit in either Figure 99 or Figure 100.
The circuit shown gives an output voltage range of
±VREF. Rail-to-rail operation at the amplifier output is
achievable using an OPA703 as the output amplifier.
The output voltage for any input code can be
calculated with Equation 4:
Figure 99. Bipolar Output Range Using External
Reference at 5V
(4)
where D represents the input code in decimal
(0
–65535).
With VREFH = 5V, R1 = R2 = 10k.
(5)
This result has an output voltage range of
±5V with
0000h corresponding to a
–5V output and FFFFh
corresponding
to
a
+5V
output,
as
shown
in
Figure 99. Similarly, using the internal reference, a
±2.5V output voltage range can be achieved, as
Figure 100. Bipolar Output Range Using Internal
Reference
38
Copyright
2007–2011, Texas Instruments Incorporated
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