SP8853B Zarlink Semiconductor, SP8853B Datasheet

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SP8853B

Manufacturer Part Number
SP8853B
Description
Manufacturer
Zarlink Semiconductor
Datasheet

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Part Number:
SP8853B
Manufacturer:
NS
Quantity:
6 218
intended for professional radio applications, containing all the
elements (apart from the loop amplifier) required to build a PLL
frequency synthesis loop
highway and contains three independent buffers to store one
reference divider word and two local oscillator divider words.
A digital phase detector with two charge pumps,
programmable in phase and gain, are provided to improve
lock-up performance. The preset operation of the charge
pumps can be overwritten or the comparison frequencies
switched to output ports under control of the divider word. The
dual modulus ratio and so operating range is also
programmable through the same word.
feature.
temp) and -40°C to +85°C (ind. temp).
FEATURES
ABSOLUTE MAXIMUM RATINGS
Supply voltage
Storage temperature
Prescaler input voltage
The SP8853 is a low power single chip synthesiser
The device is serially programmable by a three-wire data
A power down mode is incorporated as a battery economy
The SP8853 is specified at 1.3GHz at -55°C to +125°C (mil
Improved Digital Phase Detector Eliminates
‘Dead Band’ Effects
Low Operating Power, Typically 175mW
1·3GHz Operating Frequency
Complete Phase Locked Loop
High Input Sensitivity
Programmed throughThree-Wire Bus
Wide Range of Reference Division Ratios
Local Storage for Two Frequency Words, giving
Rapid Frequency Toggling
Programmable Phase Detector Gain
Power Down Mode
255 C to 1150 C
20·3V to 17V
2·5V p-p
ORDERING INFORMATION
SP8853/A/DG, SP8853/A/HC Industrial temperature versions
SP8853/AC/DG, SP8853/AC/HC Military temperature versions
*F
detector sense bit in the F1/F2 programming word. The
above diagram is correct when the sense bit is low. See
Table 2 and Fig. 7.
V
V
V
V
POWER DOWN
1.3 GHz Professional Synthesiser
1.3 GHz Professional Synthesiser
CC
CC
CC
CC
PD
1, V
2, V
3, V
4, V
RF INPUT
RF INPUT
and F
Fig. 1 Pin identification diagram (top view)
F
V
V
EE
EE
EE
EE
V
REF
CC
CC
EE
1 – preamplifier and prescaler supplies
2 – oscillator supplies
3 – charge pump 2 supplies
4 – ECL supplies
4
4
1
*
REF
5
6
7
8
9
10
11
outputs are reversed by the phase
12
4
13
3
SP8853
14
2
15
1
28
16
27 26
17 18
25
24
23
22
21
20
19
Data Sheet
SP8853
SP8853
PD2 OUTPUT
RPD
V
GROUND
XTAL 1
XTAL2
V
CC
EE
2
3
June 2003
HC28

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SP8853B Summary of contents

Page 1

The SP8853 is a low power single chip synthesiser intended for professional radio applications, containing all the elements (apart from the loop amplifier) required to build a PLL frequency synthesis loop The device is serially programmable by a three-wire data ...

Page 2

SP8853 10 RF INPUT 16/17 OR 8/9 11 CONTROL RF INPUT LOGIC 13 F1/F2 14 DATA 15 DATA 2-BIT CLOCK INPUT SR 16 ENABLE POWER 6 DOWN REFERENCE 20 21 CRYSTAL PD1 3 CHARGE PUMP 1 CHARGE PUMP 2 f ...

Page 3

Data Sheet 400 350 300 250 200 150 100 150 Fig. 4 Typical input characteristics and input drive requirements for SP8853 A and B DATA CLOCK ENABLE ...

Page 4

SP8853 ELECTRICAL CHARACTERISTICS These characteristics are guaranteed over the following range of operating conditions unless otherwise stated: Supply voltage V = 14·75V to 15·25V Characteristic Supply current Supply current in power down mode Input sensitivity Input overload RF ...

Page 5

Data Sheet DESCRIPTION Prescaler and AM Counter The programmable divider chain counter design and therefore contains a dual modulus front end prescaler counter which controls the dual modulus ratio and an M counter which controls ...

Page 6

SP8853 update cycle will consist of a byte containing 24 bits whereas the reference byte will contain 18 bits. The device requires 3 bytes, each with a chip select sequence, totalling 66 bits to fully program. ...

Page 7

Data Sheet PHASE DETECTOR GAIN CONTROL (SEE TABLE 1) MSB PHASE DETECTOR SENSE BIT (SEE TABLE 2) PHASE DETECTOR GAIN CONTROL (SEE TABLE 1) MSB PHASE DETECTOR SENSE ...

Page 8

SP8853 13·25k 1250 500 500 10 RF INPUT 11 RF INPUT 10k 0·8mA Fig preamplifer inputs 24k 20 21 100 Fig. 8d Oscillator pins EXTERNAL RESISTOR 24 Fig. 8g ...

Page 9

Data Sheet DESCRIPTION A basic application using a single phase detector is shown in Fig. 6a. The SP8853 is a 1·3GHz part so good RF design techniques should be employed, including the use of a ground plane and suitable high ...

Page 10

SP8853 FROM PHASE DETECTOR Fig. 9 Standard form of second order loop filter LOOP CALCULATIONS Many frequency synthesiser designs use a second order loop with a loop filter of the form shown in Fig practice, ...

Page 11

Data Sheet C1 R1 FROM CHARGE PUMP Fig. 11 Standard form of third order loop filter where and v are as defined for the second order loop and F is the phase ...

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... For more information about all Zarlink products Information relating to products and services furnished herein by Zarlink Semiconductor Inc. trading as Zarlink Semiconductor or its subsidiaries (collectively “Zarlink”) is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use ...

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