DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ General Description The DS1091L is a low-cost clock generator that is factory trimmed to output frequencies from 130kHz to 66.6MHz with a nominal accuracy of ±0.25%. The device can also produce a center- or down-dithered spread-spectrum output with pin-selectable dither magnitude and rate. Assembled in an 8-pin µMAX® package, the DS1091L is designed to operate with a 3.0V to 3.6V power supply over the automotive temperature range (-40°C to +125°C). Applications Automotive Infotainment Features S Spread-Spectrum Clock Output from 130kHz to 66.6MHz S -40°C to +125°C Operating Temperature Range S ±1.75% Accuracy Across Temperature and Voltage S Factory Trimmed S Center-Dithered (DS1091LUA) or Down-Dithered (DS1091LUB) Spread-Spectrum Output S Pin-Selectable Center-Dither Magnitude of 0%, ±1%, ±2%, or ±4% POS Terminals S Pin-Selectable Down-Dither Magnitude of 0%, -2%, -4%, or -8% LCD Displays S Pin-Selectable Dither Rate Printers S 3.0V to 3.6V Supply Operation Industrial Control S Lead(Pb)-Free, 8-Pin µMAX Package Typical Operating Circuit VCC fOUT VCC OUT VCC DECOUPLING CAPACITORS GND SEL1 8 1 2 DS1091L 7 3 6 4 5 Custom Frequency Options Custom frequency options are available. See the Ordering Information or contact the factory by email at custom. [email protected] for more information. DR N.C. N.C. VCC Ordering Information appears at end of data sheet. SEL0 EconOscillator is a trademark and µMAX is a registered trademark of Maxim Integrated Products, Inc. For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/DS1091L.related 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. 19-5768; Rev 2; 9/11 DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ ABSOLUTE MAXIMUM RATINGS Voltage Range on VCC Relative to Ground..........-0.5V to +6.0V Voltage Range on DR, SEL0, SEL1 Relativeto Ground................................. -0.5V to (VCC + 0.5V)* Continuous Power Dissipation (TA = +70°C) µMAX (derate 4.5mW/°C above +70°C)......................362mW Operating Temperature Range......................... -40°C to +125°C Storage Temperature Range............................. -55°C to +125°C Lead Temperature (soldering, 10s).................................+300°C Soldering Temperature (reflow).......................................+260°C *This voltage must not exceed 6.0V. 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 SYMBOL Supply Voltage VCC High-Level Input Voltage (SEL0, SEL1, DR) VIH Low-Level Input Voltage (SEL0, SEL1, DR) VIL CONDITIONS (Note 1) MIN TYP MAX UNITS 3.0 3.3 3.6 V 0.7 x VCC VCC + 0.3 V -0.3 0.3 x VCC V MAX UNITS DC ELECTRICAL CHARACTERISTICS (VCC = +3.0V to +3.6V, TA = -40NC to +125NC, unless otherwise noted.) PARAMETER SYMBOL High-Level Output Voltage (OUT) VOH IOH = -4mA, VCC = 3.0V Low-Level Output Voltage (OUT) VOL IOL = 4mA 0.4 V High-Level Input Current (SEL0, SEL1, DR) IIH VCC = 3.6V 1 FA Low-Level Input Current (SEL0, SEL1, DR) IIL VIL = 0V Supply Current (Active) ICC (Note 2) Maxim Integrated CONDITIONS MIN TYP 2.4 V -1 FA 16 mA 2 DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ AC ELECTRICAL CHARACTERISTICS (VCC = +3.0V to +3.6V, TA = -40NC to +125NC, unless otherwise noted.) PARAMETER SYMBOL Output Frequency Range fOUT Output Center Frequency Tolerance DfOUT Power-Up Time tPU Load Capacitance CL CONDITIONS MIN TYP UNITS 66.6 MHz 0.130 VCC = 3.3V, TA = +25NC -0.25 Across TA and VCC 0NC to +70NC, across VCC -1.75 +1.75 -1.2 +1.2 0 +0.25 (Note 4) < 33.3MHz (Note 3) % 0.1 ms 50 pF 15 Duty Cycle 50 40 R 33.3MHz (Note 3) % 60 Jitter (RMS), 50MHz Note 1: Note 2: Note 3: Note 4: Note 5: MAX (Note 3) 0.3 % All voltages are referenced to ground. Currents entering the IC are specified positive and currents exiting the IC are negative. Supply current measured with CL = 15pF, VCC = 3.6V, TA = +25°C, fOUT = 66.6MHz, no dither. No dither. Guaranteed by design. For aging characteristics, contact factory. Typical Operating Characteristics (VCC = 3.3V, TA = +25°C, unless otherwise noted.) VCC = 3.3V 8.2 8.0 VCC = 3.0V 7.8 0.75 0.25 fOUT = 130kHz -0.25 fOUT = 66MHz -0.75 -1.25 7.6 7.4 -40 -10 20 50 TEMPERATURE (°C) Maxim Integrated 80 110 DS1091L toc03 0.25 0.20 FREQUENCY VARIATION (%) ICC (mA) 8.6 8.4 1.25 FREQUENCY VARIATION (%) 8.8 VCC = 3.3V NO DITHER DS1091L toc02 VCC = 3.6V 9.0 1.75 DS1091L toc01 9.2 FREQUENCY VARIATION vs. VOLTAGE FREQUENCY VARIATION vs. TEMPERATURE SUPPLY CURRENT vs. TEMPERATURE 0.15 0.10 0.05 fOUT = 66MHz 0.00 -0.05 fOUT = 130kHz -0.10 -0.15 NO DITHER -0.20 -0.25 -1.75 -40 -10 20 50 80 TEMPERATURE (°C) 110 3.0 3.1 3.2 3.3 3.4 3.5 3.6 VCC (V) 3 DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ Typical Operating Characteristics (continued) (VCC = 3.3V, TA = +25°C, unless otherwise noted.) DUTY CYCLE vs. SUPPLY VOLTAGE 49.5 50 fOUT = 130kHz 48 46 49.0 NO DITHER 42 48.0 3.0 3.1 3.2 3.3 3.4 3.5 3.6 40 0.0 -40 -15 10 35 60 85 110 TIME (ns) TEMPERATURE (°C) SPECTRUM ATTENUATION vs. FREQUENCY AT DIFFERENT DITHER AMPLITUDES OUTPUT FALL TIME 5 DS1091L toc07 3.5 FALL TIME = 1.13ns TYPICAL AT 12pF LOAD 2.5 2.0 1.5 1.0 0 RBW = 120kHz 0% CENTER DITHER -10 fOUT = 33.3MHz ±1% -5 ATTENUATION (dB) 3.0 OUTPUT (V) 1.5 0.5 NO DITHER VCC (V) 8dB ±2% 11dB 14dB ±4% -15 -20 -25 0.5 -30 0.0 -35 31.9 TIME (ns) Maxim Integrated 2.0 1.0 44 48.5 RISE TIME = 1.02ns TYPICAL AT 12pF LOAD 2.5 fOUT = 66MHz 52 3.0 DS1091L toc08 fOUT = 130kHz 50.0 54 DS1091L toc06 56 OUTPUT (V) DUTY CYCLE (%) 50.5 58 DUTY CYCLE (%) fOUT = 66MHz OUTPUT RISE TIME 3.5 DS1091L toc05 51.5 51.0 DUTY CYCLE vs. TEMPERATURE 60 DS1091L toc04 52.0 32.4 32.9 33.4 33.9 34.4 34.9 FREQUENCY (MHz) 4 DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ Pin Configuration Pin Description PIN NAME 1 OUT Spread-Spectrum Clock Output 2 VCC Supply Voltage DR 3 GND Ground 4 SEL1 5 SEL0 Spread-Spectrum Dither Magnitude Select Inputs. Selects dither magnitude (see Table 1). 6, 7 N.C. No Connection 8 DR TOP VIEW OUT 1 + 8 VCC 2 7 N.C. GND 3 6 N.C. SEL1 4 5 SEL0 DS1091L µMAX FUNCTION Spread-Spectrum Dither Rate Selector. Selects dither rate (see Table 2). Block Diagram VCC fMOSC GND fMOSC FACTORY-PROGRAMMED MASTER OSCILLATOR DITHER RATE DIVIDER DR fDITHER TRIANGLE-WAVE GENERATOR (DITHER %) SEL1 DS1091L FACTORY-PROGRAMMED PRESCALER VCC fOUT OUT SEL0 fMOSC IS THE MASTER OSCILLATOR FREQUENCY. Maxim Integrated 5 DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ Detailed Description The DS1091L clock generator is capable of output frequencies from 130kHz to 66.6MHz over the full automotive temperature range (-40°C to +125°C). The device can also produce a spread-spectrum (dithered) squarewave output using four pin-selectable dither percentages. Both center (DS1091LUA) and down (DS1091LUB) dithering options are available. The device also features two selectable dither rates. The DS1091L is shipped from the factory programmed to a customer-specified frequency. Spread Spectrum The DS1091L can reduce radiated emission peaks. The dither percentage is controlled by the state of the SEL0 and SEL1 pins. The output frequency can be dithered at 0%, ±1%, ±2%, and ±4%, centered around the programmed frequency (for the DS1091LUB this can be down dithered by 0%, -2%, -4%, and -8%). The two select pins SEL0 and SEL1 provide a means of selecting the dither magnitudes as follows: A triangle-wave generator injects a control signal into the master oscillator to dither its output. The dither rate is a function of the output frequency, fOUT, as well as the setting of the DR pin (see the equation below). Figure 1A and Figure 1B show a plot of the output frequency vs. time. f DITHER RATE = OUT 2n where n is defined in Table 2 as a function of output frequency. For example, for an output frequency of 27.0MHz, the dither rate would be 13.2kHz for DR = 1 and 6.6kHz for DR = 0. Power-Up Upon the application of power, the DS1091L output is held in the low state until tPU has elapsed. This removes any possibility of erroneous output transitions during initial power-up. Table 1. Dither Magnitude SEL1 LOGIC LEVEL SEL0 LOGIC LEVEL DS1091LUA DS1091LUB 0 0 No dither No dither 0 1 Q1 -2 1 0 Q2 -4 1 1 Q4 -8 DITHER MAGNITUDE (%) Table 2. Value of n w.r.t. Output Frequency OUTPUT FREQUENCY fOUT (MHz) n fOUT (min) fOUT (max) DR = LOGIC LEVEL 1 DR = LOGIC LEVEL 0 0.130 0.260 4 5 0.261 0.521 5 6 0.522 1.042 6 7 1.043 2.083 7 8 2.084 4.167 8 9 4.168 8.333 9 10 8.334 16.667 10 11 16.668 33.333 11 12 33.334 66.667 12 13 DS1091L Frequency Spreading Profile as a Function of Dither % IF DITHER AMOUNT = 0% IF DITHER AMOUNT = 0% DITHER AMOUNT (±1%, ±2%, OR ±4%) 1 DITHER FREQ PROGRAMMED fOUT DITHER AMOUNT (-2%, -4%, OR -8%) PROGRAMMED fOUT(2%, 4%, OR 8% OF fOUT) fOUT fOUT PROGRAMMED fOUT+ (1%, 2%, OR 4% OF fOUT) PROGRAMMED fOUT PROGRAMMED fOUT(1%, 2%, OR 4% OF fOUT) 1 DITHER FREQ TIME Figure 1A. Center Dithered Maxim Integrated TIME Figure 1B. Down Dithered 6 DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ Chip Information Applications Information 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. Maxim Integrated SUBSTRATE CONNECTED TO GROUND Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 8 µMAX U8+1 21-0036 90-0092 7 DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ Ordering Information PART TEMP RANGE SPREAD SPECTRUM OUTPUT FREQUENCY (MHz) PIN-PACKAGE DS1091LUA-027+ -40NC to +125NC Center 27.0 8 FMAX DS1091LUA-027+T -40NC to +125NC Center 27.0 8 FMAX DS1091LUA-033/V+ -40NC to +125NC Center 33.3 8 FMAX DS1091LUA-033/V+T -40NC to +125NC Center 33.3 8 FMAX DS1091LUA-033+ -40NC to +125NC Center 33.3 8 FMAX DS1091LUA-033+T -40NC to +125NC Center 33.3 8 FMAX DS1091LUA-040/V+ -40NC to +125NC Center 40.0 8 FMAX DS1091LUA-040/V+T -40NC to +125NC Center 40.0 8 FMAX DS1091LUA-040+ -40NC to +125NC Center 40.0 8 FMAX DS1091LUA-040+T -40NC to +125NC Center 40.0 8 FMAX DS1091LUA-066/V+ -40NC to +125NC Center 66.6 8 FMAX DS1091LUA-066/V+T -40NC to +125NC Center 66.6 8 FMAX DS1091LUA-066+ -40NC to +125NC Center 66.6 8 FMAX DS1091LUA-066+T -40NC to +125NC Center 66.6 8 FMAX DS1091LUA-10A/V+ -40NC to +125NC Center 10.38 8 FMAX DS1091LUA-10A/V+T -40NC to +125NC Center 10.38 8 FMAX DS1091LUA-200/V+ -40NC to +125NC Center 0.20 8 FMAX DS1091LUA-200/V+T -40NC to +125NC Center 0.20 8 FMAX DS1091LUA-200+ -40NC to +125NC Center 0.20 8 FMAX DS1091LUA-200+T -40NC to +125NC Center 0.20 8 FMAX DS1091LUA-330/V+ -40NC to +125NC Center 33.0 8 FMAX DS1091LUA-330/V+T -40NC to +125NC Center 33.0 8 FMAX DS1091LUA-330+ -40NC to +125NC Center 33.0 8 FMAX DS1091LUA-330+T -40NC to +125NC Center 33.0 8 FMAX DS1091LUA-xxx+ -40NC to +125NC Center Custom (contact factory) 8 FMAX DS1091LUB-008+T -40NC to +125NC Down 8.0 8 FMAX DS1091LUB-027+ -40NC to +125NC Down 27.0 8 FMAX DS1091LUB-027+T -40NC to +125NC Down 27.0 8 FMAX DS1091LUB-033+ -40NC to +125NC Down 33.3 8 FMAX DS1091LUB-033+T -40NC to +125NC Down 33.3 8 FMAX DS1091LUB-066+ -40NC to +125NC Down 66.6 8 FMAX DS1091LUB-066+T -40NC to +125NC Down 66.6 8 FMAX DS1091LUB-xxx+ -40NC to +125NC Down Custom (contact factory) 8 FMAX V denotes an automotive qualified part. +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. xxx Denotes factory-programmed custom frequencies. Email [email protected] for more information. Maxim Integrated 8 DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ Revision History REVISION NUMBER REVISION DATE 0 9/06 Initial release 1 3/11 Added the continuous power dissipation numbers, lead temperature, and soldering temperature to the Absolute Maximum Ratings section; updated the custom frequency technical support information; updated the Ordering Information table; added the land pattern no. to the Package Information table 2 9/11 Updated the Ordering Information table DESCRIPTION PAGES CHANGED — 1, 2, 7 7 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 time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 © 2012 Maxim Integrated Products, Inc. 9 Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.