Datasheet

EVAL-AD1940AZ Preliminary Technical Data
Rev. PrA | Page 18 of 30
AD1974 ADC
AD1974
AD1974 ADC Serial Port:
AD1939 ADCs are always Master
AD1974 and AD1940 Input are always Slaves
AD1940 Input Channels 4-5 in I2S Mode
1
AGND2
2
MCLKI/XI
3
MCLKO/XO
4
AGND1
5
AVDD1
6
DAC3L
7
DAC3R
8
DAC4L
9
DAC4R
10
PD/RST
11
DSDATA4
12
DGND
13
DVDD
14
DSDATA3
15
DSDATA2
16
DSDATA1
17
DBCLK
18
DLRCLK
19
ASDATA2
20
ASDATA1
21
ABCLK
22
ALRCLK
23
CDATA
24
COUT
25
DGND
26
CCLK
27
CLATCH
28
DAC1L
29
DAC1R
30
DAC2L
31
DAC2R
32
AGND2
33
AVDD1
34
AGND1
35
FILTR
36
AGND2
37
AVDD2
38
CM
39
ADC1LP
40
ADC1LN
41
ADC1RP
42
ADC1RN
43
ADC2LP
44
ADC2LN
45
ADC2RP
46
ADC2RN
47
LF
48
AVDD2
U4
C34 C35 C36 C37
C38
L4
600Z
+
12
C39
10uF
+
12
C40
10uF
R11
49R9
C41 5.6nF
C42 390pF
R12 562R
+
C43
10uF
C44
0.10uF
+
C45
100uF
C46
0.10uF
TP33
A3V3
1974_IN3L+
1974_IN3L-
1974_IN3R+
1974_IN3R-
RESET
A3V3
D3V3
1939_ADC_LRCLK
1939_ADC_BCLK
1974_ASDATA1
MCLK
A3V3
Figure 22. AD1974 ADC Schematics