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參數(shù)資料
| 型號(hào)： | AD9870EB |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | IF Digitizing Subsystem |
| 中文描述： | 中頻數(shù)字化子系統(tǒng) |
| 文件頁(yè)數(shù)： | 6/20頁(yè) |
| 文件大?。?/td> | 233K |
| 代理商： | AD9870EB |
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REV. 0
AD9870
–6–
Address Bit
(Hex)
Breakdown
Width
Default Value
Name
Description
CLOCK SYNTHESIZER (Continued)
0x13
(7:0)
8
0x3C
CKN(7:0)
Synthesized Frequency Divisor (8 LSBs of a 13-Bit Word).
Default Yields 300 kHz from f
CLK
= 18 MHz.
Min = 3, Max = 8191.
0x14
(6)
(5)
(4:2)
(1:0)
1
1
3
2
0
0
0
0
CKF
CKINV
CKI
CKTM
Enable Fast Acquire.
Invert Charge Pump (0 = Pump_Up
IOUTC Sources Current).
Charge Pump Current in Normal Operation. I
PUMP
= (CKI + 1)
×
0.625 mA.
Manual Control of CLK Charge Pump (0 = Off, 1 = Down, 2 = Up, 3 = Normal).
0x15
(3:0)
4
0x0
CKFA(13:8)
CK Fast Acquire Time Unit (4 MSBs of a 14-Bit Word).
0x16
(7:0)
8
0x04
CKFA(7:0)
CK Fast Acquire Time Unit (8 LSBs of a 14-Bit Word).
SSI CONTROL
0x18
(7:0)
8
0x12
SSICRA
SSI Control Register A. See Table III.
(Default is FS and CLKOUT Three-Stated.)
0x19
(1:0)
2
0x0
SSICRB
SSI Control Register B. See Table III.
0x1A
(3:0)
4
1
SSIORD
Output Rate Divisor. f
CLKOUT
= f
CLK
/SSIORD.
AAF CAPACITOR SETTING/CALIBRATION
0x1C
(7:0)
8
0x00
AAR
Antialias Response Selector. 0x60 Is Recommended.
0x1D
5
(4:0)
1
5
0
0x0
ERRN
CAPN
Error Flag.
AAF N-Well Capacitor Setting.
0x1E
5
(4:0)
1
15
0
0x0
ERRP
CAPP
Error Flag.
AAF Poly-Poly Capacitor Setting.
TEST REGISTERS AND SPI PORT READ ENABLE
0x38
(7:0)
8
0x00
TEST
Factory Test Mode.
0x39
0
1
0
TEST
Factory Test Mode.
0x3A
(7:4, 2:0)
(3)
7
1
0x0
0
TEST
SPIREN
Factory Test Mode.
Enable Read from SPI Port.
0x3B–
0x3F
(7:0)
1
0x00
TEST
Factory Test Mode.
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| AD9873 | Analog Front End Converter for Set-Top Box, Cable Modem |
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