AD9712BAN Analog Devices, AD9712BAN Datasheet - Page 4

• Manufacturer Part Number: AD9712BAN
• Description: 12-Bit/ 100 MSPS D/A Converters
• Manufacturer: Analog Devices

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