Overview
The LTC6902CMS#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 to be highly versatile and efficient, making it suitable for a variety of applications. The oscillator frequency can be set by a single external resistor, and it also features optional spread spectrum frequency modulation (SSFM) to improve electromagnetic compatibility (EMC) performance.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Operating Supply Range | 2.7 to 5.5 | V |
| Power Supply Current | 0.35 to 0.55 | mA |
| Frequency Range | 100kHz to 20MHz | |
| Frequency Error (5kHz to 10MHz, TA = 25°C) | < 1.5% | |
| Frequency Error (5kHz to 10MHz, TA = 0°C to 70°C) | < 2% | |
| Temperature Stability | ±40 ppm/°C | |
| Start-Up Time | 50µs to 1.5ms | |
| Output Driver Resistance | 100Ω CMOS | |
| Package Type | 10-Lead MSOP | |
| Operating Temperature Range | -40°C to 85°C |
Key Features
- 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
- Single external resistor sets the frequency
- Single external resistor sets the percent frequency spreading
- Low power consumption with typical supply current of 400µA at 3V and 1MHz
- Fast start-up time: 50µs to 1.5ms
- 100Ω CMOS output driver
- Operates from a single 2.7V to 5.5V supply
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 LTC6902CMS#TRPBF?
The frequency range is from 100kHz to 20MHz.
- How is the oscillator frequency set in the LTC6902CMS#TRPBF?
The oscillator frequency is set by a single external resistor (RSET).
- What is the purpose of the spread spectrum frequency modulation (SSFM) in the LTC6902CMS#TRPBF?
The SSFM modulates the oscillator's frequency to spread the energy over a wide frequency band, improving EMC performance.
- How is the amount of frequency spreading controlled in the LTC6902CMS#TRPBF?
The amount of frequency spreading is controlled by a single external resistor (RMOD) and can be disabled by grounding the MOD pin.
- What is the typical supply current of the LTC6902CMS#TRPBF at 3V and 1MHz?
The typical supply current is 400µA.
- What is the operating temperature range of the LTC6902CMS#TRPBF?
The operating temperature range is from -40°C to 85°C.
- What type of package does the LTC6902CMS#TRPBF come in?
The device comes in a 10-Lead MSOP package.
- What are some common applications of the LTC6902CMS#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 LTC6902CMS#TRPBF improve electromagnetic compatibility (EMC) performance?
The device improves EMC performance through its optional spread spectrum frequency modulation (SSFM) capability.
- What is the start-up time of the LTC6902CMS#TRPBF?
The start-up time is between 50µs to 1.5ms.
