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Reliability Data
Product Selector Card
LT Journal
Software and Simulation
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Linduino
Features
- 1kHz to 68MHz Square Wave Output
- 0.5% (Typ) Initial Frequency Accuracy
- Frequency Error <1.1% Over All Settings
- 10ppm/°C Typical Frequency Drift Over Temperature
- 0.1% Resolution
- 1.7mA Typical Supply Current (f < 1MHz, VS = 2.7V)
- 2.7V to 5.5V Single Supply Operation
- Jitter <0.4% Typical 1kHz to 8MHz
- Easy to Use SPI (LTC6903) or I2C (LTC6904) Serial Interface
- Output Enable Pin
- –55°C to 125°C Operation
- MS8 Package
Typical Application
Description
The LTC6903/LTC6904 are low power self contained digital frequency sources providing a precision frequency from 1kHz to 68MHz, set through a serial port. The LTC6903/ LTC6904 require no external components other than a power supply bypass capacitor, and they operate over a single wide supply range of 2.7V to 5.5V.
The LTC6903/LTC6904 feature a proprietary feedback loop that linearizes the relationship between digital control setting and frequency, resulting in a very simple frequency setting equation:
MS-8
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC6904CMS8#PBF | MSOP | 8 | C | $2.60 | $2.10 |
| LTC6904CMS8#TRPBF | MSOP | 8 | C | $2.16 | |
| LTC6904HMS8#PBF | MSOP | 8 | H | $2.99 | $2.42 |
| LTC6904HMS8#TRPBF | MSOP | 8 | H | $2.48 | |
| LTC6904IMS8#PBF | MSOP | 8 | I | $2.99 | $2.42 |
| LTC6904IMS8#TRPBF | MSOP | 8 | I | $2.48 | |
| LTC6904MPMS8#PBF | MSOP | 8 | MP | $8.78 | $6.30 |
| LTC6904MPMS8#TRPBF | MSOP | 8 | MP | $8.84 | $6.36 |
| LTC6904CMS8 | MSOP | 8 | C | $5.20 | $4.20 |
| LTC6904CMS8#TR | MSOP | 8 | C | $4.32 | |
| LTC6904HMS8 | MSOP | 8 | H | $5.98 | $4.84 |
| LTC6904HMS8#TR | MSOP | 8 | H | $4.96 | |
| LTC6904IMS8 | MSOP | 8 | I | $5.98 | $4.84 |
| LTC6904IMS8#TR | MSOP | 8 | I | $4.96 |
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 |
|---|---|---|---|
| DC726B-B | LTC6904 Demo Board | 1kHz to 68MHz Serial Port Programmable Oscillator (req DC2026) | $100.00 |
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC2026C | Linduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform | $75.00 | |
| DC590B | Isolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards | $50.00 |