ADC12DL080_14 Datasheet, PDF (27/35 Pages) Texas Instruments – Dual 12-Bit, 80 MSPS, A/D Converter for IF Sampling

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ADC12DL080
SNAS345 – FEBRUARY 2006
+3.3V
++
2 x 10 PF
3 x 0.1 PF
2 x 0.1 PF
CHOKE _{2 x 0.1 PF}
V_{IN_B}
0.1 PF
1
T2
0.1 PF
ADT1-1WT
22
39 pF
*
22
39 pF
*
V_{IN_A}
0.1 PF
1
T2
0.1 PF
ADT1-1WT
Crystal Oscillator
Connect to VRMA
PD
1k
7 _VREF
4
0.1 PF
100
5
10 PF ₆
0.1 PF
0.1 PF
0.1 PF
14
0.1 PF
13
10 PF ₁₂
0.1 PF
VR B
M
V_RPB
VR B
N
VR A
M
V_RP A
VR A
N
1
2
VINB-
VINB+
ADC12DL080
DB11 ⁵⁷
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
56
55
54
53
52
47
46
45
44
43
42
12x100:
100
22
39 pF
*
22
39 pF
*
50
16
15
VINA-
VINA+
60
CLK
21
OF/DOEN
11
REFSEL/DCS
22
OEA/OF
59
PD
41
OEB/DRDY
1/4
74ACQ04
DA11
DA10
DA9
DA8
DA7
DA6
DA5
DA4
DA3
DA2
DA1
DA0
39
38
37
36
35
34
29
28
27
26
25
24
12x100:
* This R-C network is suitable for input
frequencies up to 70 MHz. For undersampling
applications do not install these capacitors.
Refer to Section 1.3.2 for more information.
D0
Q0
D1
Q1
D2
Q2
D3
Q3
D4
Q4
D5
Q5
D6
Q6
D7
Q7
D8
Q8
D9
Q9
D10 Q10
D11 Q11
D12 Q12
D13 Q13
D14 Q14
D15 Q15
CLK
OE
74LVTH162374
ChB
Output Word
D0
Q0
D1
Q1
D2
Q2
D3
Q3
D4
Q4
D5
Q5
D6
Q6
D7
Q7
D8
Q8
D9
Q9
D10 Q10
D11 Q11
D12 Q12
D13 Q13
D14 Q14
D15 Q15
CLK
OE
74LVTH162374
ChA
Output Word
Figure 5. Application Circuit using Transformer Drive Circuit
V_RM from ADC
50:
SIGNAL
INPUT
49.9,
1%
255, 1%
280, 1%
511, 1%
22
+
V_CM
-
Amplifier:
LMH6650
511, 1%
22
To ADC
VIN-
39 pF
39 pF
To ADC
VIN+
Figure 6. Optional Amplifier Drive for Circuit in Figure 5
Copyright © 2006, Texas Instruments Incorporated
Product Folder Links: ADC12DL080
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