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AD9012 データシート(PDF) 4 Page - Analog Devices

部品番号 AD9012
部品情報  High Speed 8-Bit TTL A/D Converter
PDF  8 Pages
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メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
Logo AD - Analog Devices

AD9012 データシート(HTML) 4 Page - Analog Devices

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REV. F
AD9012
–4–
PIN FUNCTION DESCRIPTIONS
Pin No. Mnemonic
Description
11DIGITAL +VS
One of Three Positive Digital Supply Pins (Nominally 5.0 V)
12
OVERFLOW INH
OVERFLOW INH BIT controls the data output coding for overvoltage inputs (AIN
≥ + VREF).
3
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.
18DIGITAL +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 INH is enabled (overflow enabled, floating). See OVERFLOW INH.
28
DIGITAL –VS
One of Two Negative Digital Supply Pins (Nominally –5.2 V). Both digital supply pins should be
connected together.
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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