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DAC8564 数据表(PDF) 38 Page - Texas Instruments

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部件名 DAC8564
功能描述  16-Bit, Quad Channel, Ultra-Low Glitch, Voltage Output
PDF  51 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

DAC8564 数据表(HTML) 38 Page - Texas Instruments

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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
DAC8564
SBAS403D
– JUNE 2007 – REVISED MAY 2011
www.ti.com
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 = 10kΩ.
(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 shows.
Figure 100. Bipolar Output Range Using Internal
Reference
38
Copyright
© 2007–2011, Texas Instruments Incorporated



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