|
AD9712B Datasheet, PDF (4/12 Pages) Analog Devices – 12-Bit, 100 MSPS D/A Converters | |||
|
◁ |
AD9712B/AD9713B
PIN DESCRIPTIONS
Pin # Name
Function
1â10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
D2âD11
D12 (LSB)
DIGITAL âVS
ANALOG RETURN
IOUT
ANALOG âVS
IOUT
REFERENCE IN
CONTROL AMP OUT
CONTROL AMP IN
REFERENCE OUT
DIGITAL âVS
REFERENCE GROUND
DIGITAL +VS
RSET
ANALOG âVS
LATCH ENABLE
DIGITAL GROUND
D1 (MSB)
Ten bits of twelve-bit digital input word.
Least Significant Bit (LSB) of digital input word.
Input Coding vs. Current Output
Input Code D1âD12
IOUT (mA)
IOUT (mA)
1111111111
0000000000
â20.475
0
0
â20.475
One of two negative digital supply pins; nominally â5.2 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 â1.â
One of two negative analog supply pins; nominally â5.2 V.
Complementary analog current output; zero scale output occurs with digital inputs at all â1.â
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.
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
â1.18 V.
One of two negative digital supply pins; nominally â5.2 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/
RSET) when using internal amplifier. Nominally 7.5 kâ¦.
One of two negative analog supply pins; nominally â5.2 V.
Transparent latch control line. Register is transparent when LATCH ENABLE is LOW.
Digital ground return.
Most Significant Bit (MSB) of digital input word.
PIN CONFIGURATIONS
DIP
PLCC/LCC
D2 1
28 D1 (MSB0)
D3 2
27 DIGITAL GROUND
D4 3
26 LATCH ENABLE
D5 4
25 ANALOG âVS
D6 5
24 RSET
D7 6 AD9712B
AD9713B
D8 7
23 DIGITAL +VS
22 REFERENCE GROUND
TOP VIEW
D9 8 (Not to Scale) 21 DIGITAL âVS
D10 9
20 REFERENCE OUT
D11 10
19 CONTROL AMP IN
D12 (LSB) 11
DIGITAL âVS 12
ANALOG RETURN 13
18 CONTROL AMP OUT
17 REFERENCE IN
16 I OUT
IOUT 14
15 ANALOG âVS
4 3 2 1 28 27 26
D6 5
D7 6
D8 7
D9 8
D10 9
D11 10
D12 (LSB) 11
AD9712B
AD9713B
TOP VIEW
(Not to Scale)
25 ANALOG âVS
24 R SET
23 DIGITAL +VS
REFERENCE
22 GROUND
21 DIGITAL âVS
REFERENCE
20 OUT
19 CONTROL
AMP IN
12 13 14 15 16 17 18
â4â
REV. B
|
▷ |