The document introduces the characteristics of the UC1633 series integrated circuits. The series integrated circuits are used in phase-locked frequency control loops and have precise frequency references. They can be generated using the device's high-frequency oscillator and programmable frequency dividers. It can operate using a wide range of crystals, or can function as a buffer stage to an external frequency source.
The UC1633 family of integrated circuits is designed for use in phase locked frequency control loops, optimized for precision speed control of DC motors but universal enough for most applications requiring phase locked control. The device generates a precise reference frequency using a high frequency oscillator and programmable frequency dividers, which can operate with a broad range of crystals or function as a buffer to an external frequency source.
Key features include a phase detector with absolute frequency steering for optimum start-up and lock times, a digital lock indicator, and a 5V reference output. The circuit incorporates two high current op-amps that can source or sink in excess of 16mA to provide a low impedance control signal to driving circuits. Additional options include a double edge feature on the frequency feedback sensing amplifier to increase loop bandwidths.
| Supply Current | 20 to 28 mA |
|---|---|
| Reference Output Voltage | 4.75 to 5.25 V |
| Maximum Operating Frequency | 10 MHz |
| Operating Junction Temperature (UC1633) | -55°C to +125°C |
| Operating Junction Temperature (UC2633) | -25°C to +85°C |
| Operating Junction Temperature (UC3633) | 0°C to +70°C |
| Op-Amp Output Current | Excess of 16mA |
The supply current is typically between 20 mA and 28 mA when the input voltage is 15V.
The typical reference output voltage (VREF) is 5.0 V.