The LTC6900 is a precision, low power 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 LTC6900 has been designed for high accuracy operation (≤1.5% frequency error) without the need for external trim components. The LTC6900 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 10kΩ to 2
The LTC6900 is a precision, low‑power oscillator that operates from a single 2.7 V to 5.5 V supply and provides a rail‑to‑rail, 50 % duty‑cycle square‑wave output. Frequency is set by one external resistor (10 kΩ – 2 MΩ) and can be divided by 1, 10 or 100 using the three‑state DIV pin.
Typical applications include portable equipment, cell phones, charge‑pump drivers, clock references for switching power supplies, and replacements for crystal or ceramic oscillators. The device offers +40 ppm/°C temperature stability, <1.5 % frequency error, and fast start‑up times of 50 µs to 1.5 ms.
| Supply Voltage (V+) | 2.7 V to 5.5 V |
|---|---|
| Frequency Range | 1 kHz to 20 MHz |
| Typical Supply Current | 0.32 mA (5 V) / 0.29 mA (3 V) |
| Temperature Stability | ±40 ppm/°C |
| Frequency Accuracy | < 1.5 % (5 kHz‑10 MHz) |
| Duty Cycle | 50 % ± 1 % (1 kHz‑2 MHz) / 50 % ± 5 % (2 MHz‑10 MHz) |
| Start‑up Time | 50 µs to 1.5 ms |
| Package | 5‑Lead Plastic TSOT‑23 (ThinSOT) |
It operates from a single supply voltage between 2.7 V and 5.5 V.
The device typically starts up in 50 µs to 1.5 ms, depending on the resistor value.
It offers a temperature stability of ±40 ppm per degree Celsius.