DS1090 OUTPUT FREQUENCY RANGE PIN- PACKAGE PART PRESCALER

Transcription

1 Rev ; / PART OUTPUT FREQUENCY RANGE PRESCALER * PIN- PACKAGE U-1 MHz to MHz 1 µsop U-2* 2MHz to MHz 2 µsop U-* 1MHz to 2MHz µsop U-* 5kHz to 1MHz µsop U-16 U-32* 25kHz to 5kHz 125kHz to 25kHz 16 µsop 32 µsop V IN V OUT TOP VIEW OUT JC DC-DC STEP-DOWN CONVERTER OUT R SET JC1 JC J1 JC1 GND 5 J 5kΩ TO 91kΩ R SET GND J J1 µsop Maxim Integrated Products 1

2 ABSOLUTE MAXIMUM RATINGS Voltage Range on Relative to Ground...-.5V to +6.V Voltage Range on Input Pins Relative to Ground...-.5V to ( +.5V), not to exceed 6.V Operating Temperature Range...- C to +5 C Storage Temperature Range C to +125 C Soldering Temperature...See IPC/JEDEC J-STD-2A Specification 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 DC OPERATING CONDITIONS (T A = - C to +5 C) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage (Note 1) V.7 x V Input Logic 1 (J, J1, JC, JC1) + IH.3 V Input Logic (J, J1, JC, JC1) V IL x V DC ELECTRICAL CHARACTERISTICS ( = +3.V to +5.5V, T A = - C to +5 C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS C L = 15pF, = 3.3V, R SET = kω 1. Supply Current I CC ma C L = 15pF, = 5.5V, R SET = kω I OH = -ma High-Level Output Voltage (OUT) V OH = min 2. V Low-Level Output Voltage (OUT) V OL I OL = ma. V High-Level Input Current (J, J1, JC, JC1) Low-Level Input Current (J, J1, JC, JC1) I IH V IH = +1. µa I IL V IL = V -1. µa Resistor Current I RES = max 15 µa 2

3 AC ELECTRICAL CHARACTERISTICS ( = +3.V to +5.5V, T A = - C to +5 C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Internal Master Oscillator Frequency Output Frequency Tolerance f OUT = 3.3V, T A = +25 C f MOSC.. MHz T A = +25 C, R SET =, = 3.V to 3.6V (Notes 2, 3) Voltage Frequency Variation f OUT T A = +25 C, R SET =, =.5V to 5.5V (Notes 2, 3) Temperature Frequency Variation f OUT = 3.3V (Notes 2, 3, ) Peak-to-Peak Dither (3σ) (Note 5) % J = GND, J1 = GND J =, J1 = GND 2 J = GND, J1 = J =, J1 = % % Power-Up Time t POR + t STAB (Note 6).1.5 ms Load Capacitance C L (Note 7) 3 pf Output Duty Cycle MHz to MHz, T A = +25 C (Note 3) 5 55 <MHz (Note ) 5 % Output Rise/Fall Time t R, t F C L = 15pF 2 ns % Note 1: Note 2: Note 3: Note : Note 5: Note 6: Note 7: All voltages referenced to ground. This is the change observed in output frequency due to changes in temperature or voltage. See the Typical Operating Characteristics section. Parameter is guaranteed by design and is not production tested. This is a percentage of the output period. Parameter is characterized but not production tested. This can be varied from % to %. This indicates the time between power-up and the outputs becoming active. An on-chip delay is intentionally introduced to allow the oscillator to stabilize. t STAB is equivalent to ~5 clock cycles and is dependent upon the programmed output frequency. Output voltage swings can be impaired at high frequencies combined with high output loading. 3

4 ( = +3.3V, T A = +25 C, unless otherwise noted.) SUPPLY CURRENT (ma) SUPPLY CURRENT vs. SUPPLY VOLTAGE NO LOAD, T A = +25 C kω kω SUPPLY VOLTAGE (V) toc1 SUPPLY CURRENT (ma) SUPPLY CURRENT vs. TEMPERATURE NO LOAD, = 3.3V kω kω TEMPERATURE ( C) toc2 SUPPLY CURRENT (ma) SUPPLY CURRENT vs. OUTPUT LOADING T A = +25 C, R SET = kω LOAD CAPACITANCE (pf) 5V V 3V toc3 3.1 = 3.V OUTPUT VOLTAGE HIGH vs. OUTPUT CURRENT toc. = 3.V OUTPUT VOLTAGE LOW vs. OUTPUT CURRENT toc5 1 9 OUTPUT FREQUENCY vs. SUPPLY VOLTAGE T A = +25 C toc6 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V).3.2 FREQUENCY (MHz) 7 6 kω kω OUTPUT CURRENT (ma) OUTPUT CURRENT (ma) SUPPLY VOLTAGE (V)

5 ( = +3.3V, T A = +25 C, unless otherwise noted.) FREQUENCY (MHz) = 3.3V kω OUTPUT FREQUENCY vs. TEMPERATURE kω TEMPERATURE ( C) toc7 DUTY CYCLE (%) DUTY CYCLE vs. TEMPERATURE = 5V = 3.3V R SET = kω U TEMPERATURE ( C) toc RESISTOR CURRENT (µa) RESISTOR CURRENT vs. RESISTOR VALUE = 3.3V, T A = +25 C R SET (kω) toc9 FREQUENCY ERROR (%) FREQUENCY ERROR vs. SUPPLY VOLTAGE (FROM 3.3V) T A = +25 C kω kω toc1 FREQUENCY ERROR (%) FREQUENCY ERROR vs. TEMPERATURE (FROM +25 C) = 3.3V kω kω toc11 POWER (dbm) POWER SPECTRUM vs. SPREAD OFF ±2% ±% ±% = 3.3V, T A = +25 C, JC = JC1 = 1 toc SUPPLY VOLTAGE (V) TEMPERATURE ( C) FREQUENCY (MHz) 5

6 PIN NAME FUNCTION 1 OUT Oscillator Output 2 R SET Frequency Control Resistor Input 3 Positive-Supply Terminal GND Ground 5 J Dither Amplitude (Percentage) Inputs 6 J1 (see Table 2) 7 JC Dither Rate Divisor Inputs (see Table 1) JC1 R SET VOLTAGE- BIAS CIRCUIT + + MASTER OSCILLATOR (VCO) MHz MHz f MOSC FACTORY PROGRAMMED PRESCALER ( 1, 2,,, 16, OR 32) f OSC BUFFER f OUT OUT DITHER GENERATOR GND + - DITHER AMPLITUDE TRIANGLE GENERATOR DITHER RATE (, 2,, OR %) f MOD ( 12) (,, 16, OR 32) J J1 JC JC1 6

7 fmosc (MHz) MASTER OSCILLATOR FREQUENCY vs. EXTERNAL RESISTOR SELECTION fig1 (+ 1, 2, or % of f MOSC ) Programmed f MOSC (- 1, 2, or % of f MOSC ) fmosc 1 f MOD TIME IF DITHER AMOUNT = % DITHER AMOUNT (2,, OR %) R SET RESISTANCE (kω) E + 11 fmosc Resistor 9 f fmod = MOSC Divisor 12 JC1 JC DITHERING PERCENTAGE (f MOSC /n) DIVISOR SETTING F MOSC / F MOSC / 12 1 f MOSC / f MOSC /

8 J1 J DITHER PERCENT (%) ± µ µ TRANSISTOR COUNT: 13 SUBSTRATE CONNECTED TO GROUND japan.maxim-ic.com/dallaspackinfo Maxim Integrated Products, 12 San Gabriel Drive, Sunnyvale, CA is a registered trademark of Maxim Integrated Products, Inc. is a registered trademark of Dallas Semiconductor Corporation. 2 Maxim Integrated Products, Inc. All rights reserved.