Datasheet
Data Sheet AD1939
Rev. E | Page 9 of 32
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
NC
64
NC
63
AVDD
62
LF
61
ADC2RN
60
ADC2RP
59
ADC2LN
58
ADC2LP
57
ADC1RN
56
ADC1RP
55
ADC1LN
54
ADC1LP
53
CM
52
AVDD
51
NC
50
NC
49
DVDD
17
DSDATA3
18
DSDATA2
19
DSDATA1
20
DBCLK
21
DLRCLK
22
VSUPPLY
23
VSENSE
24
VDRIVE
25
ASDATA2
26
ASDATA1
27
ABCLK
28
ALRCLK
29
CIN
30
COUT
31
DVDD
32
AGND
1
MCLKI/XI
2
MCLKO/XO
3
AGND
4
AVDD
5
OL3P
6
OL3N
7
OR3P
8
OR3N
9
OL4P
10
OL4N
11
OR4P
12
OR4N
13
PD/RST
14
DSDATA4
15
DGND
16
AGND
48
FILTR
47
AGND
46
AVDD
45
AGND
44
OR2N
43
OR2P
42
OL2N
41
OL2P
40
OR1N
39
OR1P
38
OL1P
36
CLATCH
35
CCLK
34
DGND
33
OL1N
37
AD1939
TOP VIEW
(Not to Scale)
DIFFERENTIAL
OUTPUT
NC = NO CONNECT
06071-021
Figure 2. 64-Lead LQFP, Differential Output, Pin Configuration
Table 10. Pin Function Descriptions
Pin No. In/Out Mnemonic Description
1 I AGND Analog Ground.
2 I MCLKI/XI Master Clock Input/Crystal Oscillator Input.
3 O MCLKO/XO Master Clock Output/Crystal Oscillator Output.
4
I
AGND
Analog Ground.
5 I AVDD Analog Power Supply. Connect to analog 3.3 V supply.
6 O OL3P DAC 3 Left Positive Output.
7 O OL3N DAC 3 Left Negative Output.
8 O OR3P DAC 3 Right Positive Output.
9 O OR3N DAC 3 Right Negative Output.
10 O OL4P DAC 4 Left Positive Output.
11 O OL4N DAC 4 Left Negative Output.
12 O OR4P DAC 4 Right Positive Output.
13 O OR4N DAC 4 Right Negative Output
14 I
PD/ RST
Power-Down Reset (Active Low).
15
I/O
DSDATA4
DAC Serial Data Input 4. Data input to DAC4 data in/TDM DAC2 data out (dual-line
mode)/AUX DAC2 data out (to external DAC2).
16 I DGND Digital Ground.
17 I DVDD Digital Power Supply. Connect to digital 3.3 V supply.
18 I/O DSDATA3
DAC Serial Data Input 3. Data input to DAC3 data in/TDM DAC2 data in (dual-line
mode)/AUX ADC2 data in (from external ADC2).
19 I/O DSDATA2
DAC Serial Data Input 2. Data input to DAC2 data in/TDM DAC data out/AUX ADC1
data in (from external ADC1).
20 I DSDATA1 DAC Serial Data Input 1. Data input to DAC1 data in/TDM DAC data in/TDM data in.
21 I/O DBCLK Bit Clock for DACs.
22 I/O DLRCLK LR Clock for DACs.