Overview
The LTC6902IMS#TRPBF, produced by Analog Devices Inc., is a precision, low-power, and easy-to-use oscillator that provides multiphase outputs in a small package. This device is designed for applications requiring flexible and reliable clocking solutions. It operates over a wide frequency range and offers features such as spread spectrum frequency modulation (SSFM) to improve electromagnetic compatibility (EMC) performance.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Frequency Range | 5 kHz to 20 MHz | |
| Supply Voltage | 2.7 V to 5.5 V | V |
| Supply Current | 400 µA (typical at V+ = 3V, 1 MHz) | mA |
| Frequency Error | < 1.5% (max, 5 kHz to 10 MHz at TA = 25°C) | % |
| Frequency Error | < 2% (max, 5 kHz to 10 MHz at TA = 0°C to 70°C) | % |
| Temperature Stability | ±40 ppm/°C | ppm/°C |
| Start-Up Time | 50 µs to 1.5 ms | s |
| Output Driver | 100Ω CMOS | Ω |
| Package | 10-Lead MSOP | |
| Operating Temperature Range | –40°C to 85°C | °C |
Key Features
- Provides 2-, 3-, or 4-phase outputs with programmable divider (divide by 1, 10, or 100)
- Optional spread spectrum frequency modulation (SSFM) for improved EMC performance
- Frequency set by a single external resistor (RSET)
- Frequency spreading controlled by an additional external resistor (RMOD)
- Low power consumption with a typical supply current of 400 µA at 3V and 1 MHz
- Fast start-up time: 50 µs to 1.5 ms
- Operates from a single supply voltage of 2.7V to 5.5V
Applications
- Switching power supply clock reference
- Portable and battery-powered equipment
- PDAs and cell phones
- Clocking switched capacitor filters
Q & A
- What is the frequency range of the LTC6902IMS#TRPBF?
The frequency range of the LTC6902IMS#TRPBF is from 5 kHz to 20 MHz.
- How is the oscillator frequency set in the LTC6902IMS#TRPBF?
The oscillator frequency is set by a single external resistor (RSET) connected between the SET pin and the V+ pin.
- What is the purpose of the spread spectrum frequency modulation (SSFM) in the LTC6902IMS#TRPBF?
The SSFM capability modulates the oscillator's frequency by a pseudorandom noise (PRN) signal to spread the oscillator's energy over a wide frequency band, improving electromagnetic compatibility (EMC) performance.
- How is the amount of frequency spreading controlled in the LTC6902IMS#TRPBF?
The amount of frequency spreading is controlled by an additional external resistor (RMOD) connected between the MOD pin and the V+ pin.
- What is the typical supply current of the LTC6902IMS#TRPBF?
The typical supply current is 400 µA at V+ = 3V and 1 MHz.
- What is the operating temperature range of the LTC6902IMS#TRPBF?
The operating temperature range is –40°C to 85°C.
- What types of packages are available for the LTC6902IMS#TRPBF?
The device is available in a 10-Lead MSOP package.
- What is the start-up time of the LTC6902IMS#TRPBF?
The start-up time is between 50 µs to 1.5 ms.
- What are some common applications of the LTC6902IMS#TRPBF?
Common applications include switching power supply clock references, portable and battery-powered equipment, PDAs, cell phones, and clocking switched capacitor filters.
- How does the LTC6902IMS#TRPBF improve EMC performance?
The LTC6902IMS#TRPBF improves EMC performance through its optional SSFM capability, which spreads the oscillator's energy over a wide frequency band, reducing peak electromagnetic radiation levels.
