DS1089LU-140+W

Differential - Input:Output:	No/No
Base Part Number:	DS1089L
Supplier Device Package:	8-uMAX
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply:	2.7 V ~ 3.6 V
Divider/Multiplier:	Yes/No
Frequency - Max:	66MHz
Series:	EconOscillator™
Ratio - Input:Output:	1:1
Number of Circuits:	1
Output:	Clock
Input:	Clock
PLL:	No
Type:	Clock Generator
Part Status:	Active
Packaging:	Tube

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Introduction

The DS1089LU-140+W (hereinafter referred to as the “DS1089") is a dual, low power, digitally-controlled, programmable, frequency synthesizers. It has advanced features that allow higher integration and smarter design, thereby providing system cost savings and design flexibility. In this article, we shall look at the application field and working principle of the DS1089 family.

Application Field

The DS1089 family has various applications in the communications, industrial, instrumentation, medical, military, and automotive fields. In the communications field, the DS1089 can be used where phase noise performance and frequency stability is a top consideration, particularly in cellular and wireless networks. In industrial applications, the DS1089 can be employed as a system clock generator and phase-locked loop (PLL). In instrumentation, the DS1089 is useful for the frequency stabilization of ultra-stable microwave and radar systems. In medical applications, the DS1089 can provide precise timing control for imaging applications such as PET, CT, MRI and so on. In military applications, it can be used to control precision timing in advanced fighter aircraft. The DS1089 is also suitable for automotive applications that require small size, low power consumption and low cost, such as car audio, powertrain control and body control systems.

Working Principle

The DS1089 family is based on an advanced architecture that combines digital and analog techniques to provide advanced features such as digital frequency control, fast locking, high output frequency accuracy and stability, and low noise output. At the core of the DS1089 is a digital-controlled oscillator (DCO) that can generate an output frequency from the low range of 50kHz to the high range of 266MHz. The DCO is controlled by a phase locked loop (PLL) that utilizes a high-frequency crystal oscillator (XTAL) and an adjustable voltage-controlled oscillator (VCO). The phase detector detects the frequency difference between the XTAL and the VCO and sends signals to the loop filter. The loop filter then adjusts the voltage-controlled oscillator\'s frequency to achieve the desired frequency. To adjust the DCO\'s output, the user can send a sequence of I2C commands with the desired frequency. The DCO will then tune its frequency to the desired output value. The DS1089 also includes a programmable divider that can divide the input frequency by a programmable divisor to produce a lower output frequency. This divider allows the user to generate an output frequency that is an exact multiple of the input frequency.In addition to being a simple frequency synthesizer, the DS1089 can also be used as a jitter attenuator. This means that certain frequencies that contain jitter or noise can be reduced to create a smooth output frequency. This feature is useful for devices that require a low jitter input, such as clock trees that send data over long distances. Finally, the DS1089 has Low Phase Noise (LPN) mode which can reduce the phase noise of the output frequency. This is useful for achieving high performance in sensitive applications such as clock tree applications.

Conclusion

The DS1089 family of frequency synthesizers is a powerful and versatile tool with a wide range of applications. Its advanced architecture allows it to generate highly precise clock frequencies as well as reduce jitter and phase noise. It can be used in a variety of applications, ranging from communications to instrumentation, medical to automotive. Whether you need a low-frequency clock generator, a jitter attenuator, or a high-accuracy frequency synthesizer, the DS1089 is the ideal choice.

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