NJ8821 Datasheet (General Electric Company)

NJ8821, FREQUENCY SYNTHESISER

Pin no.

1 Name PDA Description Analog output from the sample and hold phase comparator for use as a ‘fine’ error signal.

Output at (VDD2VSS)/2 when the system is in lock.

Voltage increases as fv phase lead increases; voltage decreases as fr phase lead increases.

Output is linear over only a narrow

www.DataSheet4U.com NJ8821 DS3278-1.3 NJ8821 FREQUENCY SYNTHESISER (MICROPROCESSOR INTERFACE) WITH RESETTABLE COUNTERS The NJ8821 is a synthesiser circuit fabricated on the GPS CMOS process and is capable of achieving high sideband attenuation and low noise performance.

It contains a reference oscillator, 11-bit programmable reference divider, digital and sample-and-hold comparators, 10-bit programmable ‘M’ counter, 7-bit programmable ‘A’ counter and the necessary control and latch circuitry f

NJ8821 Features

* Fig.1 Pin connections - top view s s s s Low Power Consumption Microprocessor Compatible High Performance Sample and Hold Phase Detector >10MHz Input Frequency ABSOLUTE MAXIMUM RATINGS Supply voltage, VDD2VSS Input voltage Open drain output, pin 3 All other pins Storage temperature Storage temper