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AD9712BBP Datasheet(PDF) 4 Page - Analog Devices

No. de pieza AD9712BBP
Descripción Electrónicos  12-Bit, 100 MSPS D/A Converters
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Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
Logo AD - Analog Devices

AD9712BBP Datasheet(HTML) 4 Page - Analog Devices

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AD9712B/AD9713B
REV. B
–4–
PIN DESCRIPTIONS
Pin #
Name
Function
1–10
D2–D11
Ten bits of twelve-bit digital input word.
11
D12 (LSB)
Least Significant Bit (LSB) of digital input word.
Input Coding vs. Current Output
Input Code D1–D12
IOUT (mA)
IOUT (mA)
1111111111
–20.475
0
0000000000
0
–20.475
12
DIGITAL –VS
One of two negative digital supply pins; nominally –5.2 V.
13
ANALOG RETURN
Analog ground return. This point and the reference side of the DAC load resistors should be
connected to the same potential (nominally ground).
14
IOUT
Analog current output; full-scale output occurs with digital inputs at all “1.”
15
ANALOG –VS
One of two negative analog supply pins; nominally –5.2 V.
16
IOUT
Complementary analog current output; zero scale output occurs with digital inputs at all “1.”
17
REFERENCE IN
Normally connected to CONTROL AMP OUT (Pin 18). Direct line to DAC current source
network. Voltage changes at this point have a direct effect on the full-scale output value of
unit. Full-scale current output = 128 (Reference voltage/RSET) when using internal amplifier.
18
CONTROL AMP OUT
Normally connected to REFERENCE INPUT (Pin 17). Output of internal control amplifier,
which provides a temperature-compensated drive level to the current switch network.
19
CONTROL AMP IN
Normally connected to REFERENCE OUT (Pin 20) if not connected to external reference.
20
REFERENCE OUT
Normally connected to CONTROL AMP IN (Pin 19). Internal voltage reference, nominally
–1.18 V.
21
DIGITAL –VS
One of two negative digital supply pins; nominally –5.2 V.
22
REFERENCE GROUND
Ground return for the internal voltage reference and amplifier.
23
DIGITAL +VS
Positive digital supply pin, used only on the AD9713B; nominally +5 V. No connection to this
pin on AD9712B.
24
RSET
Connection for external resistance reference. Full-scale current out = 128 (Reference voltage/
RSET) when using internal amplifier. Nominally 7.5 k
Ω.
25
ANALOG –VS
One of two negative analog supply pins; nominally –5.2 V.
26
LATCH ENABLE
Transparent latch control line. Register is transparent when LATCH ENABLE is LOW.
27
DIGITAL GROUND
Digital ground return.
28
D1 (MSB)
Most Significant Bit (MSB) of digital input word.
PIN CONFIGURATIONS
PLCC/LCC
ANALOG –VS
R SET
DIGITAL +VS
REFERENCE
GROUND
DIGITAL –VS
REFERENCE
OUT
CONTROL
AMP IN
D 6
D 9
D 8
D 7
D11
D10
AD9712B
AD9713B
(Not to Scale)
TOP VIEW
5
6
7
8
9
10
11
28
27
26
1
2
3
4
25
24
23
22
21
20
19
12
13
14 15 16
17
18
D
(LSB)
12
DIP
D 6
D9
D8
D7
D11
D10
D12 (LSB)
D 5
D3
D4
D 2
ANALOG RETURN
IOUT
DIGITAL –VS
D1 (MSB0)
DIGITAL GROUND
LATCH ENABLE
RSET
REFERENCE GROUND
REFERENCE OUT
CONTROL AMP IN
I OUT
REFERENCE IN
CONTROL AMP OUT
ANALOG –VS
DIGITAL +VS
DIGITAL –VS
ANALOG –VS
1
2
3
7
28
27
26
22
8
9
10
21
20
19
11
12
18
17
4
5
25
24
6
23
TOP VIEW
(Not to Scale)
13
14
16
15
AD9712B
AD9713B


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