LTC6903 - 1kHz – 68MHz Serial Port Programmable Oscillator

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:

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

Applications

Precision Digitally Controlled Oscillator
Power Management
Direct Digital Frequency Synthesis (DDS) Replacement
Replacement for DAC and VCO
Switched Capacitor Filter Clock

Packaging

**Order Information**
Part Number	Package	Temp	Price(1-99)	Price (1k)*
LTC6903CMS8#PBF	MS-8	C	$2.45	$1.95
LTC6903CMS8#TRPBF	MS-8	C		$2.01
LTC6903HMS8#PBF	MS-8	H	$2.82	$2.24
LTC6903HMS8#TRPBF	MS-8	H		$2.30
LTC6903IMS8#PBF	MS-8	I	$2.82	$2.24
LTC6903IMS8#TRPBF	MS-8	I		$2.30

Demo Boards


Part Number	Description	Price
DC726B-A	LTC6903 Demo Board \| 1kHz to 68MHz Serial Port Programmable Oscillator (req DC2026)	$100.00

**Companion Boards**
Part Number	Description	Price
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