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SP8858 PDF预览

SP8858

更新时间: 2024-11-21 04:03:15
品牌 Logo 应用领域
加拿大卓联 - ZARLINK /
页数 文件大小 规格书
21页 547K
描述
1·5GHz Professional Synthesiser

SP8858 数据手册

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SP8858  
1·5GHz Professional Synthesiser  
Supersedes March 1997 version, DS3843 - 3.0  
DS3843 - 4.1 July 1998  
The SP8858 is a single chip synthesiser intended for PLL  
signal synthesis applications up to 1.5GHz and includes a  
dual modulus prescaler (4N/N11), programmable A, M and  
R dividers, digital phase detector, charge pump and lock  
detect circuits.  
The SP8858 is a development of the SP8853 synthesiser  
with low residual phase noise, increased dynamic range  
above 1GHz and an improved high gain phase detector  
design that eliminates the dead-band.  
The low prescaler modulus, programmable to either 16/17  
or 8/9, together with the 15-bit M counter and 13-bit reference  
counter make this device ideal for a diverse range of high  
performance applications.  
The nominal phase detector gain is set by a reference  
current into pin 24 and the gain can be varied over a 4:1 range  
when the device is programmed. The dividers, the phase  
detector sense, the prescaler modulus and the data buffer  
control logic are also programmable using the three wire  
serial interface. An alternative 22-bit control word for the A  
and M dividers and phase detector gain can be stored so  
allowing fast frequency hopping and bandwidth switching by  
simply toggling the logic level on pin 13 (F1/F2). In addition,  
the A counter of the ‘active’ buffer can be programmed with  
only 6 bits, allowing fast hopping to adjacent channels.  
A simple exclusive - or lock detect circuit is also provided,  
thesensitivityofwhichisdeterminedbyanexternalcapacitor.  
4
3
2
1
28 27 26  
5
25  
24  
23  
22  
21  
20  
19  
F
*
CP OUTPUT  
RPD  
REF  
6
POWER DOWN  
7
V
V
4
4
1
V
3
CC  
EE  
8
GROUND  
XTAL 1  
XTAL2  
SP8858  
CC  
CC  
9
V
10  
11  
RF INPUT  
RF INPUT  
V
2
EE  
12 13 14 15 16 17 18  
HC28  
FEATURES  
4
3
2
1
28 27 26  
Low Residual Phase Noise (see Reference 1)  
Operation to 1·5GHz over Full Temperature Range  
High Input Sensitivity  
5
25  
F
*
REF  
CP OUTPUT  
RPD  
6
24  
23  
22  
21  
20  
19  
POWER DOWN  
7
V
V
4
4
1
EE  
V
3
CC  
Improved Linear Digital Phase Detector  
Programmable Charge Pump Current: 10µA to 2 mA  
On-chip 416/17 or 48/9 Dual Modulus Prescaler  
Three-wire Serial Data Interface  
13-bit Reference Counter  
8
SP8858  
CC  
CC  
GROUND  
XTAL 1  
XTAL2  
9
V
10  
11  
RF INPUT  
RF INPUT  
V
2
EE  
12 13 14 15 16 17 18  
15-bit M Counter  
Stores an Alternative Programming Word  
Facility to Program A counter Only  
Power Saving Standby Mode  
HP28  
Fig. 1 Pin connections (top view)  
ABSOLUTE MAXIMUM RATINGS  
ORDERING INFORMATION  
Supply voltage  
20·3V to 17V  
265°C to 1150°C  
255°C to 1125°C  
2·5V p-p  
Storage temperature  
Operating temperature  
Prescaler input voltage  
SP8858 IG HCAR 240°C to 185°C (Industrial grade)  
SP8858 MG HCAR 255°C to 1125°C (Military grade)  
SP8858 IG HPAS 240°C to 185°C (Industrial grade)  

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