LTC6908
PRODUCTIONResistor Set SOT-23 Oscillator with Spread Spectrum Modulation
- Part Models
- 28
- 1ku List Price
- Starting From $2.05
Part Details
- LTC6908-1: Complementary Outputs (0°/180°)
- LTC6908-2: Quadrature Outputs (0°/90°)
- 50kHz to 10MHz Frequency Range
- One External Resistor Sets the Frequency
- Optional Spread Spectrum Frequency Modulation for Improved EMC Performance
- ±10% Frequency Spreading
- 400µA Supply Current Typical (V+ = 5V, 50kHz)
- Frequency Error ≤1.5% Max (TA = 25°C, V+ = 3V)
- ±40ppm/°C Temperature Stability
- Fast Start-Up Time: 260µs Typical (1MHz)
- Outputs Muted Until Stable
- Operates from a Single 2.7V to 5.5V Supply
- Available in Low Profile (1mm) ThinSOT and DFN (2mm × 3mm) Packages
- AEC-Q100 Qualified for Automotive Applications
The LTC6908 is an easy-to-use precision oscillator that provides 2-outputs, shifted by either 180° or 90°. The oscillator frequency is programmed by a single external resistor (RSET) and spread spectrum frequency modulation (SSFM) can be activated for improved electromagnetic compatibility (EMC) performance.
The LTC6908 operates with a single 2.7V to 5.5V supply and provides rail-to-rail, 50% duty cycle square wave outputs. A single resistor from 10k to 2M is used to select an oscillator frequency from 50kHz to 10MHz (5V supply). The oscillator can be easily programmed using the simple formula outlined below:
fOUT =10MHz • 10k/RSET
The LTC6908’s SSFM capability modulates the output frequency by a pseudorandom noise (PRN) signal to decrease the peak electromagnetic radiation level and improve EMC performance. The amount of frequency spreading is fixed at ±10% of the center frequency. When SSFM is enabled, the rate of modulation is selected by the user. The three possible modulation rates are fOUT/16, fOUT/32 and fOUT/64.
Applications
- Switching Power Supply Clock Reference
- Portable and Battery-Powered Equipment
- Precision Programmable Oscillator
- Charge Pump Driver
Documentation
Data Sheet 1
Reliability Data 1
User Guide 3
Technical Articles 5
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 |
|---|---|---|---|
| LTC6908CDCB-1#TRMPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC6908CDCB-1#TRPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC6908CDCB-2#TRMPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC6908CDCB-2#TRPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC6908CS6-1#TRMPBF | 6-Lead TSOT-23 | ||
| LTC6908CS6-1#TRPBF | 6-Lead TSOT-23 | ||
| LTC6908CS6-2#TRMPBF | 6-Lead TSOT-23 | ||
| LTC6908CS6-2#TRPBF | 6-Lead TSOT-23 | ||
| LTC6908HS6-1#TRMPBF | 6-Lead TSOT-23 | ||
| LTC6908HS6-1#TRPBF | 6-Lead TSOT-23 | ||
| LTC6908HS6-1#WTRMPBF | 6-Lead TSOT-23 | ||
| LTC6908HS6-1#WTRPBF | 6-Lead TSOT-23 | ||
| LTC6908HS6-2#TRMPBF | 6-Lead TSOT-23 | ||
| LTC6908HS6-2#TRPBF | 6-Lead TSOT-23 | ||
| LTC6908HS6-2#WTRMPBF | 6-Lead TSOT-23 | ||
| LTC6908HS6-2#WTRPBF | 6-Lead TSOT-23 | ||
| LTC6908IDCB-1#TRMPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC6908IDCB-1#TRPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC6908IDCB-2#TRMPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC6908IDCB-2#TRPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC6908IS6-1#TRMPBF | 6-Lead TSOT-23 | ||
| LTC6908IS6-1#TRPBF | 6-Lead TSOT-23 | ||
| LTC6908IS6-1#WTRMPBF | 6-Lead TSOT-23 | ||
| LTC6908IS6-1#WTRPBF | 6-Lead TSOT-23 | ||
| LTC6908IS6-2#TRMPBF | 6-Lead TSOT-23 | ||
| LTC6908IS6-2#TRPBF | 6-Lead TSOT-23 | ||
| LTC6908IS6-2#WTRMPBF | 6-Lead TSOT-23 | ||
| LTC6908IS6-2#WTRPBF | 6-Lead TSOT-23 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
| No Match Found | ||
|
Jun 30, 2020 - 20_0244 Notification of Wafer Fab Location Change for 0.6µm CMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan) |
||
| LTC6908CDCB-1#TRMPBF | PRODUCTION | |
| LTC6908CDCB-1#TRPBF | PRODUCTION | |
| LTC6908CDCB-2#TRMPBF | PRODUCTION | |
| LTC6908CDCB-2#TRPBF | PRODUCTION | |
| LTC6908CS6-1#TRMPBF | PRODUCTION | |
| LTC6908CS6-1#TRPBF | PRODUCTION | |
| LTC6908CS6-2#TRMPBF | PRODUCTION | |
| LTC6908CS6-2#TRPBF | PRODUCTION | |
| LTC6908HS6-1#TRMPBF | PRODUCTION | |
| LTC6908HS6-1#TRPBF | PRODUCTION | |
| LTC6908HS6-1#WTRMPBF | ||
| LTC6908HS6-1#WTRPBF | ||
| LTC6908HS6-2#TRMPBF | PRODUCTION | |
| LTC6908HS6-2#TRPBF | PRODUCTION | |
| LTC6908HS6-2#WTRMPBF | ||
| LTC6908HS6-2#WTRPBF | ||
| LTC6908IDCB-1#TRMPBF | PRODUCTION | |
| LTC6908IDCB-1#TRPBF | PRODUCTION | |
| LTC6908IDCB-2#TRMPBF | PRODUCTION | |
| LTC6908IDCB-2#TRPBF | PRODUCTION | |
| LTC6908IS6-1#TRMPBF | PRODUCTION | |
| LTC6908IS6-1#TRPBF | PRODUCTION | |
| LTC6908IS6-1#WTRMPBF | ||
| LTC6908IS6-1#WTRPBF | ||
| LTC6908IS6-2#TRMPBF | PRODUCTION | |
| LTC6908IS6-2#TRPBF | PRODUCTION | |
| LTC6908IS6-2#WTRMPBF | ||
| LTC6908IS6-2#WTRPBF | ||
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Silicon Oscillators 1 | ||
| LTC6909 | PRODUCTION | 1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC6908-1
- LTC6908-2
OscCalc Silicon Oscillator Selection & Synthesis Tool
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