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AD9012TD View Datasheet(PDF) - Analog Devices

Part NameDescriptionManufacturer
AD9012TD High Speed 8-Bit TTL A/D Converter ADI
Analog Devices ADI
AD9012TD Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
AD9012
Pin No. Mnemonic
11
DIGITAL +VS
12
OVERFLOW INH
3
HYSTERESIS
14
+VREF
15
ANALOG INPUT
16
ANALOG GROUND
17
ENCODE
18
DIGITAL +VS
19
ANALOG GROUND
10
ANALOG INPUT
11
–VREF
12
REFMID
13
DIGITAL +VS
14
DIGITAL –VS
15
16–19
20
21, 22
D1 (LSB)
D2–D5
DIGITAL GROUND
ANALOG –VS
23
24, 25
26
27
DIGITAL GROUND
D6, D7
D8 (MSB)
OVERFLOW
28
DIGITAL –VS
PIN FUNCTION DESCRIPTIONS
Description
One of Three Positive Digital Supply Pins (Nominally 5.0 V)
OVERFLOW INH BIT controls the data output coding for overvoltage inputs (AIN + VREF).
Analog Input
Overflow Enabled (Floating)
of D1 D2 D3 D4 D5 D6 D7 D8
Overflow Inhibited (GND)
of D1 D2 D3 D4 D5 D6 D7 D8
VIN +VREF
10 0 0 0 0 0 0 0
01 1 1 1 1 1 1 1
VIN < +VREF
0XXXXX XXX
0XXXX XX XX
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.
The Most Positive Reference Voltage for the Internal Resistor Ladder
One of Two Analog Input Pins. Both analog input pins should be connected together.
One of Two Analog Ground Pins. Both analog ground pins should be connected together.
TTL Level ENCODE Command Input. ENCODE is rising edge sensitive.
One of Three Positive Digital Supply Pins (Nominally +5.0 V)
One of Two Analog Ground Pins. Both analog ground pins should be connected together.
One of Two Analog Input Pins. Both analog inputs should be connected together.
The Most Negative Reference Voltage for the Internal Resistor Ladder
The Midpoint Tap on the Internal Resistor Ladder
One of Three Positive Digital Supply Pins (Nominally +5.0 V)
One of Two Negative Digital Supply Pins (Nominally –5.2 V). Both digital supply pins should be
connected together.
Digital Data Output. D1 (LSB) is the least significant bit of the digital output word.
Digital Data Output
One of Two Digital Ground Pins. Both digital grounds pins should be connected together.
One of Two Negative Analog Supply Pins (Nominally –5.2 V). Both analog supply pins should be
connected together.
One of Two Digital Ground Pins. Both digital ground pins should be connected together.
Digital Data Output
Digital data output D8 (MSB) is the most significant bit of the digital output word.
Overflow Data Output. Logic HIGH indicates an input overvoltage (VIN > + VREF) if
OVERFLOW INH is enabled (overflow enabled, floating). See OVERFLOW INH.
One of Two Negative Digital Supply Pins (Nominally –5.2 V). Both digital supply pins should be
connected together.
PIN CONFIGURATIONS
DIGITAL +VS 1
OVERFLOW INH 2
28 DIGITAL –VS
27 OVERFLOW
HYSTERESIS 3
+VREF 4
ANALOG INPUT 5
26 D8 (MSB)
25 D7
24 D6
ANALOG GROUND
ENCODE
DIGITAL +VS
6
23 DIGITAL GROUND
AD9012
7 TOP VIEW 22 ANALOG –VS
8 (Not to Scale) 21 ANALOG –VS
ANALOG GROUND 9
20 DIGITAL GROUND
ANALOG INPUT 10
–VREF 11
REFMID 12
DIGITAL +VS 13
DIGITAL –VS 14
19 D5
18 D4
17 D3
16 D2
15 D1 (LSB)
4 3 2 1 28 27 26
ANALOG INPUT 5
ANALOG GROUND 6
ENCODE 7
DIGITAL +VS 8
ANALOG GROUND 9
ANALOG INPUT 10
–VREF 11
AD9012
TOP VIEW
(Not to Scale)
12 13 14 15 16 17 18
25 D7
24 D6
23 DIGITAL GROUND
22 ANALOG –VS
21 ANALOG –VS
20 DIGITAL GROUND
19 D5
–4–
REV. F
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