SP8401 Very Low Phase Noise 300MHz ÷10/11 Supersedes February 1992 edition DS3230 - 3.1 April 1994 The SP8401 is a very low phase noise variable modulus divider. Special circuit techniques have been used to reduce the phase noise considerably below that produced by standard dividers. The modulus control input is CMOS or TTL compatible. The SP8401 is packaged in a 28 pin plastic SO package to be compatible with the SP8400 and SP8402 devices. N/C N/C N/C VCC +5V GND CLOCK INPUT CLOCK INPUT CLOCK INPUT CLOCK INPUT GND FEATURES ■ Very low Phase Noise (Typically -160dBc/Hz at 1kHz offset) ■ Supply Voltage 5V ABSOLUTE MAXIMUM RATINGS Supply Voltage Output Current Storage Temperature Range Maximum Clock Input Voltage 6.5V 20mA -55°C to +125°C 2.5V p-p VCC +5V VCC +5V N/C MODULUS CONTROL 1 2 3 4 28 27 26 25 5 6 7 8 24 23 22 21 9 10 11 12 20 19 18 17 13 14 16 15 N/C N/C N/C N/C N/C N/C N/C OUTPUT OUTPUT N/C VCC +5V N/C N/C N/C MP28 Fig.1 Pin connections - top view ORDERING INFORMATION SP8401 KG MPES(Commercial Grade) 0 –10 –20 –30 –40 (f) (dBc/Hz) –3dB –50 –60 –70 –80 –90 –100 –110 –120 –130 –140 –150 –160 –170 1 10 100 1k Frequency (Hz) Fig.2 Typical single sideband phase noise measured at 300MHz 10k 100k SP8400 ELECTRICAL CHARACTERISTICS Guaranteed over: Supply voltage VCC = +4.75V to +5.25V Temperature Tamb = -10°C to +75°C Tested at +4.75V and +5.25V at Tamb = +25°C Characteristic Value Pin 4, 11, 12, 18 20, 21 Supply current Output voltage swing Input sensitivity 50MHz to 300MHz 7, 8 Modulus Control Inputs Logic high voltage Low low voltage Input current Set up time ts Release time tr 14 14 14 14 14 Units Min. Typ. Max. 50 340 57 440 64 mA mV 140 (-4) mV dBm 2.2 V 0.8 180 µA ns ns 4 4 Conditions Output loaded with 300R See Fig.5 p-p @ 330MHz input ÷ 11 mode Output loaded with 300R RMS Sine wave into 50 Ohms (dBm equivalent) See Fig.3 ÷ 10 mode ÷ 11 mode Modulus control input voltage 5V 400 VIN mVRMS 355mV 300 OPERATING WINDOW 200 140mV 100 0 50 100 150 200 250 INPUT FREQUENCY (MHz) Fig.3 Typical input sensitivity CLOCK INPUT MODULUS CONTROL INPUT ts tr 6 5 5 OUTPUT Fig.4 Timing diagram 2 300 350 SP8400 VCC 1nF 1 28 2 27 3 26 4 25 5 24 6 23 7 8 50R RF SIGNAL GENERATOR TTL/CMOS MODULUS CONTROL 22 SP8401 220nF OUTPUT 21 9 20 10 19 11 18 12 17 13 16 14 15 50R 1nF 10nF 1nF 2x330R 10nF Fig.4 Test circuit 3 http://www.mitelsemi.com World Headquarters - Canada Tel: +1 (613) 592 2122 Fax: +1 (613) 592 6909 North America Tel: +1 (770) 486 0194 Fax: +1 (770) 631 8213 Asia/Pacific Tel: +65 333 6193 Fax: +65 333 6192 Europe, Middle East, and Africa (EMEA) Tel: +44 (0) 1793 518528 Fax: +44 (0) 1793 518581 Information relating to products and services furnished herein by Mitel Corporation or its subsidiaries (collectively “Mitel”) is believed to be reliable. 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