LTC6905
PRODUCTION17MHz to 170MHz Resistor Set SOT-23 Oscillator
- Part Models
- 8
- 1ku List Price
- Starting From $2.26
Part Details
- One External Resistor Sets the Frequency
- Fast Start-Up Time: 100µs Typical
- Frequency Range: 17MHz to 170MHz
- Frequency Error ±0.5% Typ 17MHz to 170MHz
(TA = 0°C to 70°C, Over All Settings) - ±20ppm/°C Temperature Stability
- Rise Time: 0.5ns, CL = 5pF
- Timing Jitter: 7.2ps RMS at 170MHz
- 50% ±2.5% Duty Cycle
- 6mA Typical Supply Current, fOSC = 100MHz
- CMOS Output Drives 500Ω Load (VS = 3V)
- Operates from a Single 2.7V to 5.5V Supply
- Low Profile (1mm) ThinSOT™ Package
The LTC6905 precision, programmable silicon oscillator is easy to use and occupies very little board space. It requires only a single resistor to set the output frequency from 17MHz to 170MHz with a typical frequency error of 0.5% or less.
The LTC6905 operates with a single 2.7V to 5.5V power supply and provides a rail-to-rail, 50% duty cycle square wave output. The CMOS output driver ensures fast rise/fall times and rail-to-rail switching. Operation is simple: A single resistor, RSET, between 10K to 25K is used to set the frequency, and an internal three-state divider (DIV input) allows for division of the master clock by 1, 2 or 4, providing three frequencies for each RSET value.
The LTC6905 features a proprietary feedback loop that linearizes the relationship between RSET and frequency, eliminating the need for tables to calculate frequency. The oscillator can be easily programmed using the simple formula outlined below:
See first page of Data Sheet for formula
For higher accuracy, fixed frequency versions that include
an internal frequency-setting resistor, see the LTC6905-XXX Series datasheet.
Applications
- High Frequency Precision Oscillator
- High Speed Data Bus Clock
- Fixed Crystal Oscillator Replacement
- Ceramic Oscillator Replacement
Documentation
Data Sheet 1
Reliability Data 1
User Guide 2
Application Note 1
Technical Articles 1
Product Selector Card 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC6905CS5#TRMPBF | 5-Lead TSOT-23 | ||
| LTC6905CS5#TRPBF | 5-Lead TSOT-23 | ||
| LTC6905HS5#TRMPBF | 5-Lead TSOT-23 | ||
| LTC6905HS5#TRPBF | 5-Lead TSOT-23 | ||
| LTC6905IS5#TRMPBF | 5-Lead TSOT-23 | ||
| LTC6905IS5#TRPBF | 5-Lead TSOT-23 | ||
| LTC6905MPS5#TRMPBF | 5-Lead TSOT-23 | ||
| LTC6905MPS5#TRPBF | 5-Lead TSOT-23 |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC6905
- LTC6905-100
- LTC6905-133
- LTC6905-80
- LTC6905-96
OscCalc Silicon Oscillator Selection & Synthesis Tool
OscCalc is a quick and easy tool to help you find the right silicon oscillator for your application.
Open ToolLTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LTC6905 Silicon Oscillator Demo Board