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AD9049 Arkusz danych(PDF) 4 Page - Analog Devices

Numer części AD9049
Szczegółowy opis  9-Bit, 30 MSPS ADC
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
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AD9049 Arkusz danych(HTML) 4 Page - Analog Devices

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AD9049
REV. A
–4–
Table I. AD9049 Digital Coding (Single Ended Input AIN, AINB Bypassed to GND)
Digital Output
Analog Input
Voltage Level
MSB . . . LSB Digital Output
3.810
Positive Full Scale
111111111
3.300
Midscale
011111111
2.790
Negative Full Scale
000000000
PIN DESCRIPTIONS
Pin No
Name
Function
1, 7, 12, 21, 23
GND
Ground.
2, 8, 11
VD
Analog +5 V
± 5% power supply.
3
VREFOUT
Internal bandgap voltage reference (nominally +2.5 V).
4
VREFIN
Input to reference amplifier. Voltage reference for ADC is connected here.
5
COMP
Internal compensation pin, 0.1
µF bypass connected here to V
D (+5 V).
6
REFBP
External connection for (0.1
µF) reference bypass capacitor.
9
AINB
Complementary analog input pin (Analog input bar).
10
AIN
Analog input pin.
13
ENCODE
Encode clock input to ADC. Internal T/H is placed in hold mode (ADC is encoding)
on rising edge of encode signal.
14
NC
Not internally connected.
15
D8 (MSB)
Most significant bit of ADC output.
16–19
D7–D4
Digital output bits of ADC.
20, 22
VDD
Digital output power supply (only used by digital outputs).
24–26
D3–D1
Digital output bits of ADC.
27
D0 (LSB)
Least significant bit of ADC output.
28
NC
Not internally connected.
PIN CONNECTIONS
14
13
12
11
10
9
8
1
2
3
4
7
6
5
17
16
15
20
19
18
28
27
26
25
24
23
22
21
TOP VIEW
(Not to Scale)
AD9049
GND
D2
D1
D0 (LSB)
NC
VD
VREFOUT
VREFIN
VDD
GND
D3
COMP
REFBP
GND
VD
AINB
AIN
D4
VDD
GND
VD
GND
ENCODE
NC
D5
D8 (MSB)
D7
D6
NC = NO CONNECT
WARNING!
ESD SENSITIVE DEVICE
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD9049 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.


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