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DAC8564IBPWR Scheda tecnica(PDF) 36 Page - Texas Instruments

Il numero della parte DAC8564IBPWR
Spiegazioni elettronici  16-Bit, Quad Channel, Ultra-Low Glitch, Voltage Output DIGITAL-TO-ANALOG CONVERTER with 2.5V, 2ppm/째C Internal Reference
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
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DAC8564IBPWR Scheda tecnica(HTML) 36 Page - Texas Instruments

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BIPOLAR OPERATION USING THE DAC8564
V
REFH
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
H
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
(5)
+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
V
L
REF
DAC8564
SBAS403A – JUNE 2007 – REVISED NOVEMBER 2007
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.
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
shown in Figure 100.
Figure 100. Bipolar Output Range Using Internal
Reference
36
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Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): DAC8564



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