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參數(shù)資料
| 型號： | SA7026 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 1.3GHz low voltage fractional-N dual frequency synthesizer |
| 中文描述： | 1.3GHz的低電壓小數(shù)N頻率合成器雙 |
| 文件頁數(shù)： | 10/18頁 |
| 文件大小： | 299K |
| 代理商： | SA7026 |
Philips Semiconductors
Product specification
SA7026
1.3GHz low voltage fractional-N dual synthesizer
1999 Nov 04
10
Auxiliary Output Charge Pumps
The auxiliary charge pump on pin PHA are driven by the auxiliary phase detector and PHP, PHI are driven by the main phase detector. The
current value is determined by the external resistor attached to pin R
SET
.
Main and auxiliary charge pump currents
CP1
CP0
I
PHA
I
PHP
I
PHP–SU
I
PHI
0
0
1.5xl
SET
3xI
SET
15xl
SET
36xl
SET
0
1
0.5xl
SET
1xl
SET
5xl
SET
12xl
SET
1
0
1.5xl
SET
3xl
SET
15xl
SET
0
1
1
0.5xl
SET
1xl
SET
5xl
SET
0
NOTES
1. I
SET
= V
SET
/R
SET
: bias current for charge pumps.
2. CP1 is used to disable the PHI pump, I
PHP–SU
is the total current at pin PHP during speed up condition.
Lock Detect
The output LOCK maintains a logic ‘1’ when the auxiliary phase
detector ANDed with the main phase detector indicates a lock
condition. The lock condition for the main and auxiliary synthesizers
is defined as a phase difference of less than
frequency at the input REF
in+, –
. One counter can fulfill the lock
condition when the other counter is powered down. Out of lock (logic
’0’) is indicated when both counters are powered down.
1 period of the
Power-down mode
The power-down signal can be either hardware (PON) or software
(PD). The PON signal is exclusively ORed with the PD bits in
B-word. If PON = 0, then the part is powered up when PD = 1. PON
can be used to invert the polarity of the software bit PD. When the
synthesizer is reactivated after power-down, the main and reference
dividers are synchronized to avoid possibility of random phase
errors on power-up.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SA7026DH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:1.3GHz low voltage fractional-N dual frequency synthesizer |
| SA702D | 制造商:NXP Semiconductors 功能描述: 制造商: 功能描述: 制造商:undefined 功能描述: |
| SA702N | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Divide by: 64/65/72 triple modulus low power ECL prescaler |
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| SA-7030A | 功能描述:BCD 10-POSITION SMD J-HOOK RoHS:是 類別:開關 >> DIP 系列:SA-7000 特色產(chǎn)品:RDM Series Rotary DIP Switch 標準包裝:70 系列:RDM 電路:十六進制 位置數(shù):16 觸點額定電壓:0.1A @ 42VDC 觸動器類型:用于工具旋轉 觸動器電平:凹槽式 安裝類型:通孔 方向:頂部觸動 可清洗:是 其它名稱:EG4977-5RDMAR16PIT |
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