Agilent VTO-3981-K, VTO-4301-K Voltage Controlled Oscillator Data Sheet Features • Operating frequency: 39.813 GHz or 43.018 GHz • Output power (50Ω load): 3 dBm minimum Description The VTO-3981-K and VTO-4301-K provide a fundamental, low jitter source as a key component for the data re-timing in the transmitter subsystem and clock and data recovery in the receiver of the 40 Gb fiber optic systems. The oscillator uses an extremely high performance low noise Agilent Silicon Bipolar transistor in conjunction with a hyperabrupt varactor diode to provide the tuning capability. The oscillator output is then coupled to an Agilent GaAs FET MMIC amplifier and MMIC multiplier chain to quadruple the frequency. Finally the output is filtered through a band pass filter prior to outputting the signal at 39.813 or 43.018 GHz. • Modulation sensitivity: 20 to 40 MHz/V Functional Block Diagram • Tuning voltage: 0 to 10 Volts Amp X4 Output • Low jitter (Less than 50 femto seconds from 50 KHz to 80 MHz) • Frequency drift over 0°C to +75°C: 80 MHz • 1.181" x 0.95" x 0.4" • 5 Volt bias optional Applications • Transmitter and receiver subsystems for OC-768/STM-256 applications • 40 GHz source VTO-3981-K, VTO-4301-K Absolute Maximum Ratings [1] Parameter Units Ratings Positive Supply Voltage V 0 to +10 Negative Supply Voltage V 0 to -6 Tuning Voltage V 0 to +12 Operating Temperature °C 0 to +85 Storage Temperature °C -40 to +130 Note: 1. Operation of this device in excess of any of these limits may cause permanent damage. VTO-3981-K, VTO-4301-K Summary Characterization, 0°C to 75°C Parameter Units Min Typ Max Frequency Range, fo GHz Vt @ 39.813 GHz V 0 10 Power Output (50Ω Load) dBm 3 7 Modulation Sensitivity Modulation Sensitivity Variation MHz/V % 20 -20 40 20 Modulation Bandwidth MHz 100 Output Return Loss dB 10 Second Harmonic (Below Carrier) dBc -20 Third Harmonic (Below Carrier) dBc -20 Sub Harmonically Related Spurious dBc -30 Spurious Output (Below Carrier) dBc -65 Phase Noise @ 100 KHz from Fo (Below Carrier) dBc/Hz Frequency Drift over Temperature MHz 80 Pulling Figure (12 dB Return Loss) MHz 2 Pushing Figure, ±0.2V Supply MHz 20 Tuning Port Input Capacitance pF Positive Supply Voltage V Positive Supply Current mA Negative Supply Voltage V Negative Supply Current mA 39.813 or 43.018 12 -95 -90 12 7.8 8.2 150 -4.8 -5.2 15 39.9 28 39.8 24 39.7 1 10 100 1K 10K 100K 1M 10M 100M OFFSET FROM CARRIER (Hz) Figure 1. Typical Phase Noise Performance. 2 32 20 39.6 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 TUNING VOLTAGE (Vdc) Figure 2. Frequency and Modulation Sensitivity vs. Tuning Voltage. 16 7.0 6.5 6.0 POWER (dBm) 40.0 MODULATION SENSITIVITY (MHz/V) 30 20 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 FREQUENCY (GHz) SSB PHASE NOISE (dBc/Hz) Typical Performance Curves @ +25°C 5.5 5.0 4.5 4.0 3.5 3.0 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 TUNING VOLTAGE (Vdc) Figure 3. Power Output. Ordering Information Part Number VTO-3981-K SONET/SDH 39.813 GHz VTO-4301-K FEC 43.018 GHz +8V –5V Package Drawing and Mechanical Dimensions (inches) 3 www.agilent.com/semiconductors For product information and a complete list of distributors, please go to our web site. For technical assistance call: Americas/Canada: +1 (800) 235-0312 or (408) 654-8675 Europe: +49 (0) 6441 92460 China: 10800 650 0017 Hong Kong: (+65) 6271 2451 India, Australia, New Zealand: (+65) 6271 2394 Japan: (+81 3) 3335-8152(Domestic/International), or 0120-61-1280(Domestic Only) Korea: (+65) 6271 2194 Malaysia, Singapore: (+65) 6271 2054 Taiwan: (+65) 6271 2654 Data subject to change. Copyright © 2002 Agilent Technologies, Inc. July 23, 2002 5988-6977EN