Features and Benefits
- One External Resistor Sets the Frequency
- Fast Start-Up Time: <1ms
- 1kHz to 33MHz Frequency Range
- Frequency Error ≤1.5% 5kHz to 20MHz (TA = 25°C)
- Frequency Error ≤2% 5kHz to 20MHz (TA = 0°C to 70°C)
- ±40ppm/°C Temperature Stability
- 0.05%/V Supply Stability
- 50% ±1% Duty Cycle 1kHz to 2MHz
- 50% ±5% Duty Cycle 2MHz to 20MHz
- 1mA Typical Supply Current
- 100Ω CMOS Output Driver
- Operates from a Single 2.7V to 5.5V Supply
- Low Profile (1mm) SOT-23 (ThinSOT™ Package)
- AEC-Q100 Qualified for Automotive Applications
The LTC1799 is a precision oscillator that is easy to use and occupies very little PC board space. The oscillator frequency is programmed by a single external resistor (RSET). The LTC1799 has been designed for high accuracy operation (≤1.5% frequency error) without the need for external trim components.
The LTC1799 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. The frequency-setting resistor can vary from 3k to 1M to select a master oscillator frequency between 100kHz and 33MHz (5V supply). The three-state DIV input determines whether the master clock is divided by 1, 10 or 100 before driving the output, providing three frequency ranges spanning 1kHz to 33MHz (5V supply). The LTC1799 features a proprietary feedback loop that linearizes the relationship between RSET and frequency, eliminating the need for tables to calculate frequency.
- Low Cost Precision Oscillator
- Switching Power Supply Clock Reference
- Clocking Switched Capacitor Filters
- Fixed Crystal Oscillator Replacement
- Ceramic Oscillator Replacement
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
DC2073B demo board features SOT23 packaged silicon oscillators. The DC2073B demo board is available in eleven different options; DC2073B-A through DC2073B-K. These eleven options provide for the evaluation of resistor-set oscillator ICs and fixed frequency ICs.
Application Notes (4)
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
LTC1799 Companion Parts
Recommended µModule Isolator
Product Selector Card (1)
Technical Articles (5)
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.
Sample & Buy
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