Datasheet
AD9042
Rev. B | Page 7 of 24
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
44 43 42 41 40 39
38
37 36 35 34
32
31
30
27
28
29
33
26
25
24
23
2
3
4
7
6
5
1
8
9
10
11
NC = NO CONNECT
12
13
14
15 16 17 18
19
20
21 22
PIN 1
AD9042
TOP VIEW
(Not to Scale)
DV
CC
DV
CC
ENCODE
ENCODE
GND
GND
AIN
V
OFFSET
V
REF
C1
AV
CC
D11 (MSB)
GND
GND
GND
GND
D10
D9
DV
CC
DV
CC
DV
CC
DV
CC
D8
D7
D6
D5
D4
D3
D2
D1
D0 (LSB)
GND
NC
A
V
CC
A
V
CC
A
V
CC
A
V
CC
A
V
CC
GND
GND
GND
GND
GND
GND
00554-003
Figure 2. Pin Configuration
Table 6. Pin Function Descriptions
Pin No. Mnemonic Description
1, 2 DV
CC
5 V Power Supply (Digital). Powers output stage only.
3 ENCODE Encode Input. Data conversion initiated on rising edge.
4
ENCODE
Complement of ENCODE. Drive differentially with ENCODE or bypass to ground for single-ended clock mode.
5, 6 GND Ground.
7 AIN Analog Input.
8 V
OFFSET
Voltage Offset Input. Sets mid point of analog input range. Normally tied to V
REF
through a 50 Ω resistor.
9 V
REF
Internal Voltage Reference. Nominally 2.4 V; normally tied to V
OFFSET
through a 50 Ω resistor. Bypass to ground
and with 0.1 μF + 0.01 μF microwave chip capacitor.
10 C1 Internal Bias Point. Bypass to ground with a 0.01 μF capacitor.
11, 12 AV
CC
5 V Power Supply (Analog).
13, 14 GND Ground.
15, 16 AV
CC
5 V Power Supply (Analog).
17, 18 GND Ground.
19, 20 AV
CC
5 V Power Supply (Analog).
21, 22 GND Ground.
23 NC No Connect
24 GND Ground.
25 D0 (LSB) Digital Output Bit (Least Significant Bit).
26 to 33 D1 to D8 Digital Output Bits.
34, 35 GND Ground.
36, 37 DV
CC
5 V Power Supply (Digital). Powers output stage only.
38, 39 GND Ground.
40, 41 DV
CC
5 V Power Supply (Digital). Powers output stage only.
42, 43 D9 to D10 Digital Output Bits.
44
D11
(MSB)
Digital Output Bit (Most Significant Bit). Output coded as twos complement.