Datasheet
AD9627
Rev. B | Page 16 of 76
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
06571-006
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
D3A
D4A
D5A
DRGND
DRVDD
D6A
D7A
DVDD
D8A
D9A
D10A
D11A (MSB)
FD0A
FD1A
FD2A
FD3A
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
DRGND
D3B
D2B
D1B
D0B (LSB)
DNC
DNC
DVDD
FD3B
FD2B
FD1B
FD0B
SYNC
CSB
CLK–
CLK+
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
DRVDD
D4B
D5B
D6B
D7B
D8B
D9B
D10B
D11B (MSB)
DCOB
DCOA
DNC
DNC
D0A (LSB)
D1A
D2A
SCLK/DFS
SDIO/DCS
AVDD
AVDD
VIN+B
VIN–B
RBIAS
CML
SENSE
VREF
VIN–A
VIN+A
AVDD
SMI SDFS
SMI SCLK/PDWN
SMI SDO/OEB
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
PIN 1
INDICATOR
AD9627
PARALLEL CMOS
TOP VIEW
(Not to Scale)
EXPOSED PADDLE, PIN 0
(BOTTOM OF PACKAGE)
NOTES
1. DNC = DO NOT CONNECT.
2. THE EXPOSED PAD MUST BE CONNECTED TO ANALOG GROUND.
Figure 6. LFCSP Parallel CMOS Pin Configuration (Top View)
Table 11. Pin Function Descriptions (Parallel CMOS Mode)
Pin No. Mnemonic Type Description
ADC Power Supplies
20, 64 DRGND Ground Digital Output Ground.
1, 21 DRVDD Supply Digital Output Driver Supply (1.8 V to 3.3 V).
24, 57 DVDD Supply Digital Power Supply (1.8 V Nominal).
36, 45, 46 AVDD Supply Analog Power Supply (1.8 V Nominal).
0 AGND Ground Analog Ground. Pin 0 is the exposed thermal pad on the bottom of the package.
12, 13, 58, 59 DNC Do Not Connect.
ADC Analog
37 VIN+A Input Differential Analog Input Pin (+) for Channel A.
38 VIN−A Input Differential Analog Input Pin (−) for Channel A.
44 VIN+B Input Differential Analog Input Pin (+) for Channel B.
43 VIN−B Input Differential Analog Input Pin (−) for Channel B.
39 VREF Input/Output Voltage Reference Input/Output.
40 SENSE Input Voltage Reference Mode Select. See Table 14 for details.
42 RBIAS Input/Output External Reference Bias Resistor.
41 CML Output Common-Mode Level Bias Output for Analog Inputs.
49 CLK+ Input ADC Clock Input—True.
50 CLK− Input ADC Clock Input—Complement.
ADC Fast Detect Outputs
29 FD0A Output Channel A Fast Detect Indicator. See Table 17 for details.
30 FD1A Output Channel A Fast Detect Indicator. See Table 17 for details.
31 FD2A Output Channel A Fast Detect Indicator. See Table 17 for details.
32 FD3A Output Channel A Fast Detect Indicator. See Table 17 for details.
53 FD0B Output Channel B Fast Detect Indicator. See Table 17 for details.
54 FD1B Output Channel B Fast Detect Indicator. See Table 17 for details.
55 FD2B Output Channel B Fast Detect Indicator. See Table 17 for details.
56 FD3B Output Channel B Fast Detect Indicator. See Table 17 for details.