Datasheet
AD9858
Rev. C | Page 7 of 32
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
84
83 82 81 80 79 78 77 76
95
94
93
92 91 90 89 88
87 86 85
100999897
96
26 28
29
30
31
32
33
38
39
34
35
36 37
42
40
41
43
44
45
46
47 48 49 50
13
DVDD
D7
D6
D5
D4
DGND
DGND
DVDD
DVDD
D3
D2
D1
D0
ADDR5
ADDR4
ADDR3
RD/CS
DVDD
DVDD
DGND
DVDD
DVDD
AGND
AGND
AVDD
REFCLK
AVDD
REFCLK
AVDD
AVDD
AGND
AGND
AVDD
AGND
AGND
AGND
AVDD
AVDD
LO
LO
AVDD
AGND
AVDD
AGND
PS1
SYNCLK
FUD
PS0
DGND
DGND
RESET
DVDD
DVDD
AVDD
SPSELECT
AGND
AVDD
AVDD
AGND
IOUT
AGND
IOUT
IOUT
AGND
IOUT
DACISET
AVDD
DACBP
NC
ADDR2/IORESET
ADDR1/SDO
ADDR0/SDIO
WR/SCLK
DVDD
DGND
AVDD
NC
AGND
AVDD
DIV
DIV
AVDD
AGND
CPGND
CPVDD
CP
CP
CPFL
CPGND
CPVDD
CPISET
RF
RF
AGND
NC
NC
PFD
PFD
IF
IF
AD9858
TOP VIEW
(Not to Scale)
27
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
NOTES
1. NC = NO CONNECT.
2. THE TQFP_EP (THERMAL SLUG) MUST BE ATTACHED TO THE GROUND PLANE OR SOME OTHER LARGE
METAL MASS FOR THERMAL TRANSFER. FAILURE TO DO SO MAY CAUSE EXCESSIVE DIE TEMPERATURE
RISE AND DAMAGE TO THE DEVICE.
03166-044
Figure 2. Pin Configuration
Table 4. Pin Function Descriptions
Pin No. Mnemonic I/O Description
1 to 4, 9 to 12 D7 to D0 I
Parallel Port Data. The functionality of these pins is valid only when the I/O port is configured as
a parallel port.
5, 6, 21, 28, 95, 96 DGND Digitial Ground.
7, 8, 20, 23 to 27,
93, 94
DVDD Digital Supply Voltage.
13 to 18
ADDR5 to
ADDR0
I
When the I/O port is configured as a parallel port, these pins serve as a 6-bit address select for
accessing the on-chip registers (see the IORESET, SDO, and SDIO pins for the serial port mode).
16 IORESET I
This is valid for serial programming mode only. Active high input signal that resets the serial I/O
bus controller. It serves as a means of recovering from an unresponsive serial bus caused by
an improper programming protocol. Asserting an I/O reset does not affect the contents of
previously programmed registers, nor does it invoke their default values.