ADS-238Q Datel, Inc., ADS-238Q Datasheet - Page 3

• Manufacturer Part Number: ADS-238Q
• Description: 12-bit, 20mhz, Low Power Sampling A/D Converters
• Manufacturer: Datel, Inc.

®
RF In
Figure 3-1. ADS-238Q Transformer Coupled Input
RF In
Minicircuit
T1-6T
(+1.65V)
Minicircuit
0.01µF
T1-6T
51
®
51
9.5µA
(+1.65V)
0.01µF
(+1.15V)
(+2.15V)
Ref+ In
Ref– In
90µA
4.7µF
68pF
68pF
+
Figure 2. ADS-238QTypical Connection Diagram
4.7µF
0.01µF
V
V
V
22
12
CM
IN+
IN–
+
11
NC
NC
NC
GND
Bias1
Bias2
V
GND
V
V
GND
23
CM
IN+
IN–
0.01µF
GND
ADS-238Q
3
+3.3V
+
( 0.5V)
0.01µF
10µF
INPUT
+
–
AGND
Figure 3-2. ADS-238Q DC Coupled Single Ended Input
(3V Logic)
CLK In
R
EXC-ELSA35
Ferrite Bead
33
R2
1
0.1µF
R
Bit 1(MSB)
44
34
Bit 2
V
Bit 12 (LSB)
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
R
S
+3.3V
OP191GP
R2
51W
R
–
+
–
+
R3
R
Interfacing
OPA642
–
+
3V Logic
OPA642
+3.3V
Digital
DGND
(R3)/2
51W
51W
Decoupling
15pF
R3
ADS-238Q
Cap
V
V
V
CM
IN+
IN–