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參數(shù)資料
| 型號： | CDCE401YS |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | OSCILLATOR IC WITH ELECTRONIC CALIBRATION |
| 中文描述： | 振蕩器IC與電子校準 |
| 文件頁數(shù)： | 10/19頁 |
| 文件大?。?/td> | 246K |
| 代理商： | CDCE401YS |
www.ti.com
POST-DIVIDER SETTINGS
RECOMMENDATIONS FOR OSCILLATOR GAIN
(2)
AND OPERATING POINT DEFINITIONS
CDCE401
SCAS820–JUNE 2006
PD2
0
0
0
0
1
1
1
PD1
0
0
1
1
0
0
1
PD0
0
1
0
1
0
1
0
POST-DIVIDER SETTINGS
COMMENT
Default
Post-divider
×
1
Post-divider
×
1/2
Post-divider
×
1/4
Post-divider
×
1/8
Post-divider
×
1/16
Post-divider
×
1/32
Test mode: turns off CXI, CXO, and C
BASE
.
Post-divider
×
1 (like in default).
No division: The post-divider setting PD[2:0] = 111 is used to turn off the amplifier after the
oscillator core. This offers the capability to disable effectively all blocks except the oscillator
core (current consumption of core only can be measured and adjusted)
(1)
.
1
1
1
(1)
Setting core current consumption too high impacts the crystal drive power, which affects crystal performance and lifetime.
OG[1:0]
11
10
01
00
OP[2:0]
000
000
000
000
OSCILLATOR OSCILLATOR OPERATING FREQUENCY
Oscillator gain for 20 MHz
≤
frequency < 40 MHz
Oscillator gain for 40 MHz
≤
frequency < 60 MHz
Oscillator gain for 60 MHz
≤
frequency < 80 MHz
Oscillator gain for 80 MHz
≤
frequency
≤
100 MHz
COMMENT
Default
(2)
The oscillator gain bits have an impact on the capacitance C
. See the table for input capacitance values. This table is valid for the
whole supply voltage range. Depending on the crystal series equivalent resistance, the OP[2:0] bits might require different settings.
Contact TI for assistance.
10
Submit Documentation Feedback
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相關代理商/技術參數(shù) |
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| CDCE421 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Fully Integrated Wide-Range, Low-Jitter, Crystal-Oscillator Clock Generator |
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