LTC6908IDCB-2#TRMPBF

Programmable Timers And Oscillators Overview

The LTC6908IDCB-2#TRMPBF is a precision silicon oscillator from Analog Devices, featuring two quadrature outputs (0°/90° phase shift). It operates on a single 2.7V to 5.5V supply with a typical current of 400µA at 50kHz. The frequency is set by a single external resistor (RSET) ranging from 10kΩ to 2MΩ, covering an output range of 50kHz to 10MHz. Key specifications include ±40ppm/°C temperature stability and a fast startup time of 260µs typical at 1MHz. The device includes optional spread spectrum frequency modulation (SSFM) for improved EMC performance.

Programmable Timers And Oscillators Feature Summary

• Dual Quadrature Outputs: Provides OUT1 and OUT2 shifted by 90 degrees, suitable for multi-phase switching regulator control.
• Spread Spectrum Modulation: SSFM capability reduces peak electromagnetic radiation with fixed ±10% spreading and selectable rates (fOUT/16, fOUT/32, fOUT/64).
• Resistor-Set Frequency: Output frequency determined by a single external resistor using the formula fOUT = 10MHz • 10k/RSET.
• Low Profile Packaging: Available in a 6-lead DFN package (2mm × 3mm) with a height of 1mm.

Programmable Timers And Oscillators Applications

• Clock reference for switching power supplies and charge pump drivers.
• Portable and battery-powered equipment requiring low power consumption.
• Precision programmable oscillator circuits.
• Synchronization for multi-phase DC-DC converters using quadrature clocks.

Programmable Timers And Oscillators Procurement Notes

Verify the specific suffix #TRMPBF indicates a mini tape and reel packaging configuration containing 500 pieces. Confirm the IDCB suffix corresponds to the industrial temperature grade (-40°C to 85°C) and the DFN package type. Ensure compatibility with the required RSET resistor values for the target frequency range.

Programmable Timers And Oscillators Selection Notes

Select the LTC6908IDCB-2 variant specifically when a 90-degree phase shift between outputs is required, as opposed to the -1 variant which provides complementary (180-degree) outputs. Ensure the application supply voltage supports the desired frequency accuracy, particularly above 5MHz where higher voltages improve performance. Consider the SSFM modulation rate settings via the MOD pin if EMC reduction is necessary.

Programmable Timers And Oscillators Part Context

This component belongs to the LTC6908 family of resistor-set silicon oscillators. The 'IDCB' designation identifies it as the industrial temperature grade version housed in a 6-lead plastic DFN package. The '-2' suffix distinguishes it from the '-1' version by providing quadrature outputs instead of complementary outputs. It is designed for applications needing precise clocking with minimal external components.

Programmable Timers And Oscillators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Direct replacements within the same family include LTC6908IDCB-1#TRMPBF for complementary outputs or other temperature grades like LTC6908CDCB-2#TRMPBF for commercial temperature ranges.