AD6644PCB AD [Analog Devices], AD6644PCB Datasheet - Page 6

• Manufacturer Part Number: AD6644PCB
• Description: 14-Bit, 40 MSPS/65 MSPS A/D Converter
• Manufacturer: AD [Analog Devices]

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
ENCODE
ENCODE
Name
DV
V
ENCODE
ENCODE
AV
AIN
AIN
C1
C2
DNC
OVR
DMID
D0 (LSB)
D1–D5, D6–D12
D13 (MSB)
DRY
GND
REF
DV
AV
AV
V
GND
GND
GND
GND
GND
CC
CC
REF
AIN
AIN
CC
CC
CC
10
11
12
13
1
2
3
4
5
6
7
8
9
PIN FUNCTION DESCRIPTIONS
52
14 15 16 17 18 19 20 21 22 23 24 25 26
PIN 1
IDENTIFIER
51
PIN CONFIGURATION
50
DNC = DO NOT CONNECT
49
48
(Not to Scale)
TOP VIEW
AD6644
47
Function
3.3 V Power Supply (Digital) Output Stage Only.
Ground.
2.4 V (Analog Reference). Bypass to ground with 0.1 µF microwave
chip capacitor.
Encode Input; conversion initiated on rising edge.
Complement of ENCODE; differential input.
5 V Analog Power Supply.
Analog Input.
Complement of AIN; Differential Analog Input.
Internal Voltage Reference; bypass to ground with 0.1 µF microwave
chip capacitor.
Internal Voltage Reference; bypass to ground with 0.1 µF microwave
chip capacitor.
Do not connect this pin.
Overrange Bit; high indicates analog input exceeds ± FS.
Output Data Voltage Midpoint; approximately equal to (DVCC)/2.
Digital Output Bit (Least Significant Bit); Two’s Complement
Digital Output Bits in Two’s Complement.
Digital Output Bit (Most Significant Bit); Two’s Complement.
Data Ready Output.
–6–
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
D3
D2
D1
D0 (LSB)
DMID
GND
DV
OVR
DNC
AV
GND
AV
GND
CC
CC
CC
REV. 0