LTC6908IDCB-2#TRPBF

Programmable Timers And Oscillators Overview

The LTC6908IDCB-2#TRPBF 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 and generates frequencies from 50kHz to 10MHz via a single external resistor (RSET). The device includes spread spectrum frequency modulation (SSFM) with ±10% spreading to improve EMC performance. Key electrical parameters include a typical supply current of 400µA at 50kHz, frequency accuracy within ±1.5% max at 25°C, and temperature stability of ±40ppm/°C. It utilizes a DFN-6 package.

Programmable Timers And Oscillators Feature Summary

• Dual Quadrature Outputs: Provides OUT1 and OUT2 shifted by 90 degrees, suitable for multi-phase switching regulator synchronization.
• Spread Spectrum Modulation: SSFM capability reduces peak EMI with fixed ±10% frequency spreading and selectable rates (fOUT/16, fOUT/32, fOUT/64).
• Resistor-Set Frequency: Output frequency is programmed by a single external resistor using the formula fOUT = 10MHz • 10k/RSET.
• Low Power Consumption: Typical supply current is 400µA at 50kHz and 1.7mA at 5MHz with a 5V supply.

Programmable Timers And Oscillators Applications

• Synchronization clock for multiphase switching power supplies.
• Portable and battery-powered equipment requiring low power oscillators.
• Charge pump drivers in power management circuits.
• Precision programmable oscillator applications.

Programmable Timers And Oscillators Procurement Notes

Verify the specific suffix #TRPBF indicates Tape and Reel packaging with 2500 units per reel. Confirm the IDCB package designation corresponds to the 6-lead DFN (2mm x 3mm) form factor. Ensure the -2 variant is selected for quadrature output requirements rather than the -1 complementary variant. Check automotive qualification status if required, as standard industrial grades differ from AEC-Q100 qualified versions.

Programmable Timers And Oscillators Selection Notes

Select the LTC6908IDCB-2#TRPBF when quadrature (90-degree) phase shifting between two outputs is required for four-phase control schemes. Choose this over the -1 variant if 180-degree complementary outputs are not needed. Ensure the RSET value falls within the recommended 20kΩ to 400kΩ range for optimal accuracy. Verify that the operating temperature range of –40°C to 85°C meets system specifications.

Programmable Timers And Oscillators Part Context

This component belongs to the LTC6908 family of resistor-set silicon oscillators. The 'IDCB' suffix denotes the Industrial temperature grade (-40°C to 85°C) and the DFN-6 package. The '-2' suffix specifies the quadrature output configuration. It is distinct from the CS6 (TSOT-23) package variants and the C-grade (Commercial) temperature options.

Programmable Timers And Oscillators Replacement Considerations

Direct pin-compatible replacements within the same family include the LTC6908IDCB-1#TRPBF for complementary outputs or the LTC6908CS6-2#TRPBF for TSOT-23 packaging. Automotive-grade equivalents are available with the #W suffix, such as the LTC6908IS6-2#WTRPBF, though package differences must be accounted for.