SP8853B Zarlink Semiconductor, SP8853B Datasheet
SP8853B
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SP8853B Summary of contents
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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. ...
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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 ...
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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 ...
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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 ...
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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, ...
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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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