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AD6644
Pin No.
1, 33, 43
2, 4, 7, 10, 13, 15, 17, 19, 21, 23,
25, 27, 29, 34, 42
3
5
6
8, 9, 14, 16, 18, 22, 26, 28, 30
11
12
20
24
31
32
35
36
37–41, 44–50
51
52
PIN FUNCTION DESCRIPTIONS
Name
Function
DV
3.3 V Power Supply (Digital) Output Stage Only.
CC
GND
Ground.
2.4 V (Analog Reference). Bypass to ground with 0.1 µF microwave
V
REF
chip capacitor.
ENCODE
Encode Input; conversion initiated on rising edge.
ENCODE
Complement of ENCODE; differential input.
AV
5 V Analog Power Supply.
CC
AIN
Analog Input.
AIN
Complement of AIN; Differential Analog Input.
Internal Voltage Reference; bypass to ground with 0.1 µF microwave
C1
chip capacitor.
Internal Voltage Reference; bypass to ground with 0.1 µF microwave
C2
chip capacitor.
DNC
Do not connect this pin.
Overrange Bit; high indicates analog input exceeds ± FS.
OVR
DMID
Output Data Voltage Midpoint; approximately equal to (DVCC)/2.
D0 (LSB)
Digital Output Bit (Least Significant Bit); Two's Complement
D1–D5, D6–D12
Digital Output Bits in Two's Complement.
D13 (MSB)
Digital Output Bit (Most Significant Bit); Two's Complement.
DRY
Data Ready Output.
PIN CONFIGURATION
52
51
50
49
48
47
46
45
DV
1
CC
PIN 1
IDENTIFIER
GND
2
V
3
REF
GND
4
ENCODE
5
ENCODE
6
AD6644
GND
7
TOP VIEW
(Not to Scale)
AV
8
CC
AV
9
CC
GND
10
AIN
11
AIN
12
GND
13
14 15 16 17 18 19 20 21 22 23 24 25 26
DNC = DO NOT CONNECT
–6–
44
43
42
41
40
39
D3
D2
38
D1
37
D0 (LSB)
36
DMID
35
GND
34
DV
33
CC
OVR
32
DNC
31
AV
30
CC
GND
29
AV
28
CC
GND
27
REV. 0
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