LTC6990
PRODUCTIONTimerBlox: Voltage Controlled Silicon Oscillator
- Part Models
- 18
- 1ku List Price
- Starting From $1.97
Part Details
- 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
- AEC-Q100 Qualified for Automotive Applications
The LTC6990 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.
Optionally, a second resistor at the SET input provides linear voltage control of the output frequency and can be used for frequency modulation. A narrow or wide VCO tuning range can be configured by the appropriate selection of the two resistors.
The LTC6990 includes an enable function that is synchronized with the master oscillator to ensure clean, glitch-free output pulses. The disabled output can be configured to be high impedance or forced low.
For easy configuration of the LTC6990, use the TimerBlox LTC6990: Voltage Controlled Oscillator Web-Based Design Tool.
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
Documentation
Data Sheet 1
Reliability Data 1
User Guide 3
Design Note 1
Technical Articles 2
Video 1
Product Selector Card 1
Solutions Bulletin & Brochure 1
Rarely Asked Question Page 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 |
|---|---|---|---|
| LTC6990CDCB#TRMPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC6990CDCB#TRPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC6990CS6#TRMPBF | 6-Lead TSOT-23 | ||
| LTC6990CS6#TRPBF | 6-Lead TSOT-23 | ||
| LTC6990HDCB#TRMPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC6990HDCB#TRPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC6990HS6#TRMPBF | 6-Lead TSOT-23 | ||
| LTC6990HS6#TRPBF | 6-Lead TSOT-23 | ||
| LTC6990HS6#WTRMPBF | 6-Lead TSOT-23 | ||
| LTC6990HS6#WTRPBF | 6-Lead TSOT-23 | ||
| LTC6990IDCB#TRMPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC6990IDCB#TRPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LTC6990IS6#TRMPBF | 6-Lead TSOT-23 | ||
| LTC6990IS6#TRPBF | 6-Lead TSOT-23 | ||
| LTC6990IS6#WTRMPBF | 6-Lead TSOT-23 | ||
| LTC6990IS6#WTRPBF | 6-Lead TSOT-23 | ||
| LTC6990MPS6#TRMPBF | 6-Lead TSOT-23 | ||
| LTC6990MPS6#TRPBF | 6-Lead TSOT-23 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
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) |
||
| LTC6990CDCB#TRMPBF | PRODUCTION | |
| LTC6990CDCB#TRPBF | PRODUCTION | |
| LTC6990CS6#TRMPBF | PRODUCTION | |
| LTC6990CS6#TRPBF | PRODUCTION | |
| LTC6990HDCB#TRMPBF | PRODUCTION | |
| LTC6990HDCB#TRPBF | PRODUCTION | |
| LTC6990HS6#TRMPBF | PRODUCTION | |
| LTC6990HS6#TRPBF | PRODUCTION | |
| LTC6990HS6#WTRMPBF | PRODUCTION | |
| LTC6990HS6#WTRPBF | ||
| LTC6990IDCB#TRMPBF | PRODUCTION | |
| LTC6990IDCB#TRPBF | PRODUCTION | |
| LTC6990IS6#TRMPBF | PRODUCTION | |
| LTC6990IS6#TRPBF | PRODUCTION | |
| LTC6990IS6#WTRMPBF | ||
| LTC6990IS6#WTRPBF | ||
| LTC6990MPS6#TRMPBF | PRODUCTION | |
| LTC6990MPS6#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
LTspice 2
- LTC6990 - Counters, Timers and Delay Linear, LTC4126 - Battery Management
- LTC6990 Demo Circuit - Voltage Controlled Oscillator with 16:1 Frequency Range (250kHz to 1MHz)
Models for the following parts are available in LTspice:
- LTC6990
LTC6990: Voltage Controlled Silicon Oscillator
Open Tool
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