MAX31091 Automotive Temperature Range Spread-Spectrum EconOscillator
8Pages

Automotive Temperature Range Spread-Spectrum EconOscillator™ General Description The MAX31091 is a low-cost clock generator that is factory trimmed to output frequencies from 200kHz to 66.6MHz with a nominal accuracy of ±0.25%. The device can also produce a center-spread-spectrum output with pin-selectable dither magnitude and rate. Assembled in an 8-pin µMAX® package, the MAX31091 is designed to operate with a 3.0V to 3.6V power supply over the automotive temperature range (-40°C to +125°C). ●● Spread-Spectrum Clock Output from 200kHz to 66.6MHz ●● -40°C to +125°C Operating Temperature Range ●● ±1.75% Accuracy Across Temperature ●● Factory Trimmed ●● Center-Dithered Spread-Spectrum Output ●● Pin-Selectable Center-Dither Magnitude of 0%, ±1%, ±2%, or ±4% ●● Pin-Selectable Dither Rate Automotive Infotainment Navigation Advanced Driver Assistance System (ADAS) Engine Control Unit (ECU) Instrumentation ●● 3.0V to 3.6V Supply Operation ●● Lead(Pb)-Free, 8-Pin µMAX Package Typical Operating Circuit VCC fOUT VCC DECOUPLING CAPACITORS Custom Frequency Options Custom frequency options are available. See the Ordering Information or contact the factory by email at custom.oscillators@maximintegrated.com for more information. Ordering Information appears at end of data sheet. For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/MAX31091.related EconOscillator is a trademark and µMAX is a registered trademark of Maxim Integrated Products, Inc.

Automotive Temperature Range Spread-Spectrum EconOscillator™ *This voltage must not exceed 4.0V. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Recommended Operating Conditions (TA = -40NC to +125NC, unless otherwise noted.) PARAMETER Supply Voltage...

Automotive Temperature Range Spread-Spectrum EconOscillator™ AC Electrical Characteristics (VCC = +3.0V to +3.6V, TA = -40NC to +125NC, unless otherwise noted.) PARAMETER Output Frequency Range Load Capacitance Power-Up Time Output Center Frequency Tolerance Duty Cycle Note 1: All voltages are referenced to ground. Currents entering the IC are specified positive and currents exiting the IC are negative. Note 2: Supply current measured with CL = 15pF, VCC = 3.6V, TA = +25°C, fOUT = 66.6MHz, no dither. Note 3: No dither. Note 4: Guaranteed by design. Note 5: For aging characteristics, contact...

Automotive Temperature Range Spread-Spectrum EconOscillator™ Typical Operating Characteristics (continued) (VCC = 3.3V, TA = +25°C, unless otherwise noted.) DUTY CYCLE vs. TEMPERATURE DUTY CYCLE vs. SUPPLY VOLTAGE SPECTRUM ATTENUATION vs. FREQUENCY AT DIFFERNET DITHER AMPLITUDES toc07 RISE TIME = 1.12nS TYPICAL AT 12pF LOAD OUTPUT FALL TIME RISE TIME = 1.02nS TYPICAL AT 12pF LOAD DUTY CYCLE (%) OUTPUT RISE TIME toc05

Automotive Temperature Range Spread-Spectrum EconOscillator™ Spread-Spectrum Clock Output Supply Voltage Spread-Spectrum Dither Magnitude Select Inputs. Selects dither magnitude (see Table 1). Spread-Spectrum Dither Rate Selector. Selects dither rate (see Table 2). FACTORY-PROGRAMMED MASTER OSCILLATOR DITHER RATE DIVIDER fDITHER TRIANGLE-WAVE GENERATOR (DITHER %) FACTORY-PROGRAMMED PRESCALER Block Diagram fMOSC IS THE MASTER OSCILLATOR FREQUENCY.

Automotive Temperature Range Spread-Spectrum EconOscillator™ Detailed Description The MAX31091 clock generator is capable of output frequencies from 200kHz to 66.6MHz over the full automotive temperature range (-40°C to +125°C). The device can also produce a spread-spectrum (dithered) square-wave output using four pin-selectable dither percentages. The device also features two selectable dither rates. The MAX31091 is shipped from the factory-programmed to a customer-specified frequency. Spread Spectrum Upon the application of power, the MAX31091 output is held in the low state until tPU has...

Automotive Temperature Range Spread-Spectrum EconOscillator™ Applications Information Chip Information SUBSTRATE CONNECTED TO GROUND Power-Supply Decoupling To achieve best results, it is highly recommended that decoupling capacitors are used on the IC power-supply pins. Typical values of decoupling capacitors are 0.01µF and 0.1µF. Use a high-quality, ceramic, surface-mount capacitor, and mount it as close as possible to the VCC and GND pins of the IC to minimize lead inductance. Ordering Information PART TEMP RANGE SPREAD SPECTRUM /V denotes an automotive qualified part. +Denotes a...

Automotive Temperature Range Spread-Spectrum EconOscillator™ Revision History REVISION NUMBER REVISION DATE DESCRIPTION Initial release PAGES CHANGED — For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any...