SIT9005ACB1D-28NL

Programmable Oscillators

Oscillators are used in a wide range of applications from radar to communications to scientific instruments and more. Programmable oscillators are used where special performance is desired, or where frequent changes to the oscillator frequency are needed, or to reduce the design cycles and cost of a project. This article discusses the features and applications for one such programmable oscillator, the SIT9005ACB1D-28NL.

Product Features

The SIT9005ACB1D-28NL device is a crystal oscillator that is capable of both parallel and serial programmability. The package is a single-sided BGA with 28 pins. This device is range-programmable, with a frequency range of 1.5 to 66MHz, and the range is split over four parts. This device also has a programmable output level, with the options of 3, 3.3 or 5V. In addition, the device can be either enabled/disabled, or programmed in lock mode.

The device is capable of a wide range of temperatures, with a -20 to +70C range for operating temperature. Additionally, the device is capable of supporting both differential and single-ended outputs. Finally, the device has a wide variety of other features including a monolithic crystal, high-stability oscillator, programmable drive and pull range, and high-frequency test mode.

Applications

The SIT9005ACB1D-28NL is a versatile and ideal choice for a number of applications. Due to its wide range programmability, the device can be used in a variety of wireless communication systems, such as GSM, CDMA, and WiMAX, for example. The device can also be a great choice in the automotive industry, such as in the control systems of electric or hybrid vehicles. More precisely, the device can be used in the control and monitoring of electric and hybrid vehicle batteries, power steering and braking systems, as well as various climate control systems.

The device can also be used in test and measurement systems, such as those found in laboratories, due to its high accuracy and reliability. Due to its wide temperature and frequency range, the device can be used in a variety of industrial and medical applications, such as in MRI scanners, for example. Finally, the device can be used in a number of power electronics applications, such as in the control circuits of solar inverters, as well as in the circuits of various motor controllers.

Working Principle

The working principle of the SIT9005ACB1D-28NL is relatively straightforward. When the device is powered, an internal microcontroller reads the mode and frequency values programmed into the device. Depending on the mode, the device then proceeds to enable or disable the oscillator, or enable and lock its output frequency. Once enabled, the device outputs a stable oscillation with the programmed frequency and output level. This oscillation can either be a single-ended or a differential square wave, dependent on the programmable option.

The device also includes a power-fail detect pin, which can be used to detect any sudden changes in the input supply voltages. This pin can either be used to power-down the device, or to generate an interrupt for other system functions. In addition, the device features an internal power-down feature, which can be enabled by the microcontroller when it isn\'t needed.