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參數資料
| 型號： | AD9445-BB-PCB |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 14-Bit, 105/125 MSPS, IF Sampling ADC |
| 中文描述： | 14位，一百二十五分之一百○五MSPS的，中頻采樣ADC |
| 文件頁數： | 14/40頁 |
| 文件大?。?/td> | 965K |
| 代理商： | AD9445-BB-PCB |
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AD9445
Table 8. Pin Function Descriptions—100-Lead TQFP/EP in CMOS Mode
Pin No.
Mnemonic
1
DCS MODE
Rev. 0 | Page 14 of 40
Description
Clock Duty Cycle Stabilizer (DCS) Control Pin. CMOS compatible. DCS = low (AGND) to enable
DCS (recommended); DCS = high (AVDD1) to disable DCS.
Do Not Connect. These pins should float.
CMOS-Compatible Output Logic Mode Control Pin. OUTPUT MODE = 0 for CMOS mode;
OUTPUT MODE = 1 (AVDD1) for LVDS outputs.
Data Format Select Pin. CMOS control pin that determines the format of the output data.
DFS = high (AVDD1) for twos complement; DFS = low (ground) for offset binary format.
Set Pin for LVDS Output Current. Place 3.7 kΩ resistor terminated to DRGND.
3.3 V (±5%) Analog Supply.
2, 49 to 62, 65 to 66, 69 to 71
3
DNC
OUTPUT
MODE
DFS
4
5
6, 18 to 20, 32 to 34, 36, 38,
43 to 45, 92 to 97
7
LVDS_BIAS
AVDD1
SENSE
Reference Mode Selection. Connect to AGND for internal 1 V reference; connect to AVDD1 for
external reference.
1.0 V Reference I/O. Function dependent on SENSE and external programming resistors.
Decouple to ground with 0.1 μF and 10 μF capacitors.
Analog Ground. The exposed heat sink on the bottom of the package must be connected to
AGND.
Differential Reference Output. Decoupled to ground with 0.1 μF capacitor and to REFB
(Pin 14) with 0.1 μF and 10 μF capacitors.
Differential Reference Output. Decoupled to ground with a 0.1 μF capacitor and to REFT
(Pin 13) with 0.1 μF and 10 μF capacitors.
5.0 V Analog Supply (±5%).
Analog Input—True.
Analog Input—Complement.
Clock Input—True.
Clock Input—Complement.
Digital Output Ground.
3.3 V Digital Output Supply (3.0 V to 3.6 V).
Data Clock Output—Complement.
Data Clock Output—True.
D0 True Output Bit (CMOS levels).
D1 True Output Bit.
D2 True Output Bit.
D3 True Output Bit.
D4 True Output Bit.
D5 True Output Bit.
D6 True Output Bit.
D7 True Output Bit.
D8 True Output Bit.
D9 True Output Bit.
D10 True Output Bit.
D11 True Output Bit.
D12 True Output Bit.
D13 True Output Bit.
Out-of-Range True Output Bit.
RF ENABLE CMOS-compatible Control Pin. Optimizes the configuration of the analog front end.
Connecting RF ENABLE to AGND optimizes SFDR performance for applications with analog input
frequencies <210 MHz for 125 MSPS speed grade and <230 MHz for the 105 MSPS speed grade.
For applications with analog inputs >225 MHz for the 125 MSPS speed grade and >230 MHz
for the 105 MSPS speed grade, this pin should be connected to AVDD1 for optimum SFDR.
Power dissipation from AVDD2 increases by 150 mW to 200 mW.
8
VREF
9, 21, 24, 39, 42, 46, 91, 98,
99, Exposed Heat Sink
10
AGND
REFT
11
REFB
12 to 17, 25 to 31, 35, 37
22
23
40
41
47, 63, 75, 87
48, 64, 76, 88
67
68
72
73
74
77
78
79
80
81
82
83
84
85
86
89
90
100
AVDD2
VIN+
VIN
CLK+
CLK
DRGND
DRVDD
DCO
DCO+
D0 (LSB)
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13 (MSB)
OR
RF ENABLE
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