LTC6990 Datasheet – Voltage Controlled Silicon Oscillator
LTC6990 overview
The LTC6990 is a Voltage Controlled Silicon Oscillator made by Analog Devices, supplied in these packages: DFN 8 Pin, TSOT-23 6 Pin Type. The absolute maximum ratings table on this page lists the 6 limits from the manufacturer's datasheet that must not be exceeded. This page brings together the LTC6990 pinout and maximum ratings, with the full datasheet PDF to preview below or download.
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, N 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.
Datasheet
LTC6990 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
- 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
- frequency divider, N from 1 to 128.
- DIV, programmable to eight settings
- 50% Duty Cycle Square Wave Output
- 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
LTC6990 pinout
Absolute maximum ratings
| Parameter | Value |
|---|---|
| Maximum Voltage on Any Pin | (GND – 0.3V) ≤ VPIN ≤ (V+ + 0.3V) |
| Operating Temperature Range (Note 2) LTC6990CLTC6990ILTC6990HLTC6990MP | 40°C to 85°C 40°C to 85°C 40°C to 125°C 55°C to 125°C |
| Specified Temperature Range (Note 3) LTC6990CLTC6990ILTC6990HLTC6990MP | 0°C to 70°C 40°C to 85°C 40°C to 125°C 55°C to 125°C |
| Junction Temperature | 150°C |
| Storage Temperature Range | 65°C to 150°C |
| Lead Temperature (Soldering, 10sec) | 300°C |
LTC6990 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
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