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AD9012 数据表(PDF) 4 Page - Analog Devices

部件名 AD9012
功能描述  High Speed 8-Bit TTL A/D Converter
PDF  8 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD9012 数据表(HTML) 4 Page - Analog Devices

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REV. D
AD9012
–4–
PIN FUNCTION DESCRIPTIONS
Pin #
Name
Description
11
DIGITAL +VS
One of three positive digital supply pins (nominally +5.0 V).
12
OVERFLOW INH
OVERFLOW INHIBIT controls the data output coding for overvoltage inputs (AIN
≥ + V
REF).
13
HYSTERESIS
The Hysteresis control voltage varies the comparator hysteresis from 0 mV to 10 mV, for a
change from –5.2 V to –2.2 V at the Hysteresis control pin.
14+VREF
The most positive reference voltage for the internal resistor ladder.
15
ANALOG INPUT
One of two analog input pins. Both analog input pins should be connected together.
16
ANALOG GROUND
One of two analog ground pins. Both analog ground pins should be connected together.
17
ENCODE
TTL level encode command input. ENCODE is rising edge sensitive.
18
DIGITAL +VS
One of three positive digital supply pins (nominally +5.0 V).
19
ANALOG GROUND
One of two analog ground pins. Both analog ground pins should be connected together.
10
ANALOG INPUT
One of two analog input pins. Both analog inputs should be connected together.
11
–VREF
The most negative reference voltage for the internal resistor ladder.
12
REFMID
The midpoint tap on the internal resistor ladder.
13
DIGITAL +VS
One of three positive digital supply pins (nominally +5.0 V).
14
DIGITAL –VS
One of two negative digital supply pins (nominally –5.2 V). Both digital supply pins should be
connected together.
15
D1 (LSB)
Digital data output. D1 (LSB) is the least significant bit of the digital output word.
16–19
D2–D5
Digital data output.
20
DIGITAL GROUND
One of two digital ground pins. Both digital grounds pins should be connected together.
21, 22
ANALOG –VS
One of two negative analog supply pins (nominally –5.2 V). Both analog supply pins should be
connected together.
23
DIGITAL GROUND
One of two digital ground pins. Both digital ground pins should be connected together.
24, 25
D6, D7
Digital data output.
26
D8 (MSB)
Digital data output D8 (MSB) is the most significant bit of the digital output word.
27
OVERFLOW
Overflow data output. Logic HIGH indicates an input overvoltage (VIN > + VREF), if
OVERFLOW INHIBIT is enabled (overflow enabled, floating). See OVERFLOW INHIBIT.
28
DIGITAL –VS
One of two negative digital supply pins (nominally –5.2 V). Both digital supply pins should be
connected together.
ANALOG
OVERFLOW ENABLED (FLOATING)
OVERFLOW INHIBITED (GND)
INPUT
OF Dl D2 D3 D4 D5 D6 D7 D8
OF Dl D2 D3 D4 D5 D6 D7 D8
VIN
≥ + V
REF
1
0 0 0 0 0
0 0 0
0
1 1 1 1 1
1 1 1
VIN < + VREF
0
X X X X X X X X
0
X X X X X X X X
PIN CONFIGURATIONS
TOP VIEW
(Not to Scale)
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
AD9012
DIGITAL VS+
REFMID
–VREF
ANALOG INPUT
ANALOG GROUND
DIGITAL VS+
DIGITAL VS+
OVERFLOW INH
HYSTERESIS
+VREF
ENCODE
ANALOG GROUND
ANALOG INPUT
D1 (LSB)
D2
D3
D4
D5
DIGITAL GROUND
ANALOG VS–
DIGITAL VS–
OVERFLOW
D8 (MSB)
D7
ANALOG VS–
DIGITAL GROUND
D6
DIGITAL VS–
TOP VIEW
(Not to Scale)
28 27
1
2
3
426
25
21
22
23
24
19
20
5
6
7
8
9
10
11
12 13 14 15 16 17 18
D7
D6
DIGITAL GROUND
ANALOG VS–
ANALOG VS–
D5
ANALOG INPUT
ANALOG GROUND
ENCODE
DIGITAL VS+
ANALOG INPUT
–VREF
AD9012
DIGITAL GROUND
ANALOG GROUND



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