AD6644 Analog Devices, AD6644 Datasheet - Page 8

• Manufacturer Part Number: AD6644
• Description: 14-Bit, 40 MSPS/65 MSPS Analog-to-Digital Converter
• Manufacturer: Analog Devices

Specifications of AD6644

• Resolution (bits): 14bit
• # Chan: 1
• Sample Rate: 65MSPS
• Interface: Par
• Analog Input Type: Diff-Uni
• Ain Range: 2.2 V p-p
• Adc Architecture: Pipelined
• Pkg Type: QFP

AD6644
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 8. Pin Function Descriptions
Pin Number
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 to 41, 44 to 50
51
52
DNC = DO NOT CONNECT
ENCODE
ENCODE
GND
AIN
DNC
OVR
DMID
D1 to D5, D6 to
D12
D13 (MSB)
Mnemonic
DV
V
ENCODE
ENCODE
AV
AIN
C1
C2
D0 (LSB)
DRY
DV
AV
AV
V
REF
GND
GND
GND
GND
GND
AIN
AIN
REF
CC
CC
CC
CC
CC
10
11
12
13
1
3
4
5
6
2
7
8
9
52
14
51
PIN 1
IDENTIFIER
15 16 17 18 19 20 21 22 23 24 25 26
Figure 3. Pin Configuration
50
Rev. D | Page 8 of 24
49
Description
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 DV
Digital Output Bit (Least Significant Bit). Twos complement.
Digital Output Bits in Twos Complement.
Digital Output Bit (Most Significant Bit). Twos complement.
Data Ready Output.
48
(Not to Scale)
AD6644
TOP VIEW
47
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
CC
/2.