LTC6903IMS8#PBF

Programmable Timers And Oscillators Overview

The LTC6903IMS8#PBF is a low-power, self-contained digital frequency source manufactured by Analog Devices Inc. It provides a precision square wave output ranging from 1kHz to 68MHz, programmable via an SPI-compatible serial interface. The device operates on a single supply voltage between 2.7V and 5.5V and requires no external components other than a power supply bypass capacitor. It features a proprietary feedback loop that linearizes the relationship between digital control settings and frequency, ensuring high accuracy with typical initial frequency error of 0.5% and temperature drift of 10ppm/°C. The part is housed in an 8-lead MSOP package.

Programmable Timers And Oscillators Feature Summary

• Frequency Range: 1kHz to 68MHz square wave output
• Interface: SPI-compatible serial port for digital frequency control
• Accuracy: 0.5% typical initial frequency accuracy; <1.1% total frequency error over all settings
• Power Supply: Single 2.7V to 5.5V supply operation

Programmable Timers And Oscillators Applications

• Precision digitally controlled oscillator
• Replacement for Direct Digital Frequency Synthesis (DDS)
• Switched capacitor filter clock
• Power management systems

Programmable Timers And Oscillators Procurement Notes

Verify the specific suffix IMS8 corresponds to the industrial temperature range (-40°C to 85°C) as defined in the order information table. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors, as lead-free finish specifications are subject to change. Ensure the ordering suffix matches the required packaging format (tube vs tape and reel).

Programmable Timers And Oscillators Selection Notes

Select the LTC6903IMS8#PBF when an SPI interface is preferred over I2C. Choose this variant specifically for applications requiring operation within the -40°C to 85°C temperature range. Consider the LTC6904 series if an I2C interface is required instead. Evaluate the 5pF capacitive load limit on outputs CLK and CLK to determine if buffering is necessary for driving larger loads or long traces.

Programmable Timers And Oscillators Part Context

This component belongs to the LTC6903/LTC6904 family of silicon oscillators. The IMS8 suffix denotes the Industrial temperature grade (-40°C to 85°C) and the MSOP-8 plastic package. Other variants include CMS8 (Commercial, 0°C to 70°C), HMS8 (High Temp, -40°C to 125°C), and MPMS8 (Military/Extended, -55°C to 125°C). The #PBF indicates a lead-free finish.

Programmable Timers And Oscillators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided datasheet. Consult Analog Devices marketing for parts specified with wider operating temperature ranges or tighter frequency accuracy.