LTC6990 - TimerBlox: Voltage Controlled Silicon Oscillator
Features
- Fixed-Frequency or Voltage-Controlled Operation
– Fixed: Single Resistor Programs Frequency with <1.5% Max Error
– VCO: Two Resistors Set VCO Center Frequency and Tuning Range - Frequency Range: 488Hz to 2MHz
- 2.25V to 5.5V Single Supply Operation
- 72μA Supply Current at 100kHz
- 500μs Start-Up Time
- VCO Bandwidth >300kHz at 1MHz
- CMOS Logic Output Sources/Sinks 20mA
- 50% Duty Cycle Square Wave Output
- Output Enable (Selectable Low or Hi-Z When Disabled)
- –55°C to 125°C Operating Temperature Range
- Available in Low Profile (1mm) SOT-23 (ThinSOT™) and 2mm × 3mm DFN Package
Typical Application
Description
The LTC®6990 is a precision silicon oscillator with a programmable frequency range of 488Hz to 2MHz. It can be used as a fixed-frequency or voltage-controlled oscillator (VCO). The LTC6990 is part of the TimerBlox® family of versatile silicon timing devices.
A single resistor, RSET, programs the LTC6990’s internal master oscillator frequency. The output frequency is determined by this master oscillator and an internal frequency divider, NDIV, programmable to eight settings from 1 to 128.
Packaging
For complete and up to date package information and drawings, please refer to our packaging page
SOT-23, DFN-6
Order Info
- Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) | Price (1k)* | RoHS Data |
|---|---|---|---|---|---|---|
| LTC6990CDCB#PBF | DFN | 6 | C | $2.16 | View | |
| LTC6990CDCB#TRMPBF | DFN | 6 | C | $2.16 | $1.60 | View |
| LTC6990CDCB#TRPBF | DFN | 6 | C | $2.16 | $1.55 | View |
| LTC6990CS6#PBF | SOT-23 | 6 | C | $2.16 | View | |
| LTC6990CS6#TRMPBF | SOT-23 | 6 | C | $2.16 | $1.60 | View |
| LTC6990CS6#TRPBF | SOT-23 | 6 | C | $2.16 | $1.55 | View |
| LTC6990HDCB#PBF | DFN | 6 | H | $3.02 | View | |
| LTC6990HDCB#TRMPBF | DFN | 6 | H | $3.02 | $2.22 | View |
| LTC6990HDCB#TRPBF | DFN | 6 | H | $3.02 | $2.17 | View |
| LTC6990HS6#PBF | SOT-23 | 6 | H | $3.02 | View | |
| LTC6990HS6#TRMPBF | SOT-23 | 6 | H | $3.02 | $2.22 | View |
| LTC6990HS6#TRPBF | SOT-23 | 6 | H | $3.02 | $2.17 | View |
| LTC6990IDCB#PBF | DFN | 6 | I | $2.48 | View | |
| LTC6990IDCB#TRMPBF | DFN | 6 | I | $2.48 | $1.83 | View |
| LTC6990IDCB#TRPBF | DFN | 6 | I | $2.48 | $1.78 | View |
| LTC6990IS6#PBF | SOT-23 | 6 | I | $2.48 | View | |
| LTC6990IS6#TRMPBF | SOT-23 | 6 | I | $2.48 | $1.83 | View |
| LTC6990IS6#TRPBF | SOT-23 | 6 | I | $2.48 | $1.78 | View |
| LTC6990MPS6#PBF | SOT-23 | 6 | MP | $6.48 | View | |
| LTC6990MPS6#TRMPBF | SOT-23 | 6 | MP | $6.48 | $4.70 | View |
| LTC6990MPS6#TRPBF | SOT-23 | 6 | MP | $6.48 | $4.65 | View |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1562A-A | LTC6990: 1kHz to 10kHz VCO | $25.00 | |
| Buy Now | |||
Applications
- Low Cost Precision Programmable Oscillator
- Voltage-Controlled Oscillator
- High Vibration, High Acceleration Environments
- Replacement for Fixed Crystal and Ceramic Oscillators
- Portable and Battery-Powered Equipment
People Who Viewed This Product Also Viewed
- LTC6992 - TimerBlox: Voltage-Controlled Pulse Width Modulator (PWM)
- LTC6993 - TimerBlox: Monostable Pulse Generator (One Shot)
- LTC6991 - TimerBlox: Resettable, Low Frequency Oscillator
- LTC6994 - TimerBlox: Delay Block/ Debouncer
- LTC1799 - 1kHz to 33MHz Resistor Set SOT-23 Oscillator
- LT3080 - Adjustable 1.1A Single Resistor Low Dropout Regulator
- LT5400 - Quad Matched Resistor Network
- LTC6900 - Low Power, 1kHz to 20MHz Resistor Set SOT-23 Oscillator
- LTM2883 - SPI/Digital or I2C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power
- LTC4366-1/LTC4366-2 - High Voltage Surge Stopper
Product Notifications
Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.
Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.
Simulate
LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.
Related models available in LTspice IV
LTC6990
TimerBlox Designer is an Excel based selection and synthesis tool that allows you to choose and configure the TimerBlox part best suited for your application.
- Download and open TimerBlox Designer
- Enable Macros
- Choose the appropriate timing function and parameters
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.