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Varactor-Tuned Oscillators Technical Data
VTO-8000 Series
Features
* 600 MHz to 10.5 GHz Coverage * Fast Tuning * +7 to +13 dBm Output Power * 1.5 dB Output Flatness * Hermetic Thin-film Construction
Description
HP VTO-8000 Series oscillators use a silicon transistor chip as a negative resistance oscillator. The oscillation frequency is determined by a silicon abrupt varactor diode acting as a voltage-variable capacitor in a thin-film microstripline resonator. This provides extremely fast tuning speed, limited primarily by the internal impedance of the user-supplied voltage driver. Fast settling is another feature of the HP VTO-8000 Series oscillators. Typical settling times for the VTO-8090 are <200 kHz within one microsecond while the VTO-8950 settles to <2 MHz within two microseconds referenced to ten milliseconds. The VTO-8850 combines a bipolar transistor oscillator with a GaAs FET buffer stage. This GaAs FET buffer isolates the oscillator from
variations in load impedance for low frequency pulling, allows the oscillator to run lighty-loaded for low phase noise content and provides +10 dBm of minimum output power over the full tuning range. The VTO-8000 Series varactor-tuned oscillators are packaged in TO-8 transistor cans for simple installation in a conventional 50-ohm microstripline PC board. They are ideal for most compact, lightweight commercial and military equipment designs. Test fixturing is also available for lab bench test applications. See the "Test Fixtures for TO-8 Packages" section for additional information and outlines.
Pin Configuration
TO-8V
GROUND +V TUNE 2 1 3 4
RFOUT
+DC VOLTAGE
CASE GROUND
Applications
Frequency agile systems, such as digitally controlled receivers and active jamming transmitters often use externally linearized varactor-tuned oscillators. HP oscillators are monotonic making external linearization easy using analog (opamp) or digital (EPROM) linearizing techniques. The HP VTO Series has been designed with a tuning input bypass capacitance which is sufficient to provide the necessary RF filtering action yet as low
as possible to maximize V/T characteristics for excellent tuning speeds. Used in a phase locked loop PLL circuit, a VTO provides a receiver LO with stability equivalent to the reference oscillator (usually crystal controlled), yet variable in discrete steps or continuously depending on the PLL configuration. Another important aspect of VTOs used in an LO application is their power vs. frequency flatness ( 1.5 dB). This assures that once a receiver mixer is biased for best dynamic range the local oscillator drive will remain constant throughout the tuning range without complex leveling circuitry.
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5964-9815E
Electrical and Performance Specifications
Guaranteed Specifications @ 25C Case Temperature (0 to +65C Operating Temperature)
Part Number Frequency Range, Min. Power Output into 50-ohm Load,Min. Power Output Variation @ 25C, Max. Operating Case Temperature Range Frequency Drift Over Operating Temperature, Typ. Pulling Figure (12 dB Return Loss), Typ. Pushing Figure, +15 VDC Supply, Typ. Harmonics, Below Carrier, Typ. Spurious Output Below Carrier, Min. Tuning Voltage Low Frequency High Frequency Maximum Tuning Voltage Tuning Port Capacitance, Nom. Phase Noise, Singie Sideband, 1 Hz Bandwidth, Typ. 50 kHz From Carrier 100 kHz From Carrier Input Power 1% Regulation Voltage, Nom. Current, Max. Case Style VTO-8060 VTO-8080 VTO-8090 900-1600 MHz 20 mW/+13 dBm 1.5 dB 0 to +65C 10 MHz 25 MHz 6 MHz/V -15 dB -60 dB 2 1 VDC 48+8/-10 VDC +60 VDC 180 pF VTO-8150 VTO-8200 600-1000 MHz 800-1400 MHz 20 mW/+13 dBm 20 mW/+13 dBm 1.5 dB 1.5 dB 0 to +65C 0 to +65C 8 MHz 10 MHz 25 MHz 5 MHz/V -15 dB -60 dB 3 1 VDC 40 8 VDC +60 VDC 180 pF 25 MHz 6 MHz/V -15 dB -60 dB 2 1.5 VDC 35 10 VDC +60 VDC 180 pF 1500-2500 MHz 2000-3000 MHz 10 mW/+10 dBm 10 mW/+10 dBm 1.5 dB 1.5 dB 0 to +65C 0 to +65C 18 MHz 30 MHz 35 MHz 6 MHz/V -15 dB -60 dB 2.5 1 VDC 47 8 VDC +60 VDC 90 pF 35 MHz 6 MHz/V -18 dB -60 dB 2+2/-1 VDC 20 4 VDC +45 VDC 45 pF
-110 dBc/Hz -117 dBc/Hz +15 VDC 50 mA TO-8V
-100 dBc/Hz -107 dBc/Hz +15 VDC 50 mA TO-8V
-100 dBc/Hz -107 dBc/Hz +15 VDC 50 mA TO-8V
-95 dBc/Hz -102 dBc/Hz +15 VDC 50 mA TO-8V
-95 dBc/Hz -102 dBc/Hz +15 VDC 50 mA TO-8V
Part Number Frequency Range, Min. Power Output Into 50-ohm Load, Min. Power Output Variation @25C., Max. Operating Case Temperature Range Frequency Drift Over Operating Temperature, Typ. Pulling Figure (12 dB Return Loss), Typ. Pushing Figure, +15 VDC Supply, Typ. Harmonics, Below Carrier, Typ. Spurious Output Below Carrier, Min. Tuning Voltage Low Frequency High Frequency Maximum Tuning Voltage Tuning Port Capacitance, Nom. Phase Noise, Single Sideband, 1 Hz Bandwidth, Typ. 50 kHz From Carrier 100 kHz From Carrier Input Power 1% Regulation Voltage, Nom. Current, Max. Case Style
VTO-8240 2400-3700 MHz 10 mW/+10 dBm 1.5 dB 0 to +65C 30 MHz 35 MHz 6 MHz/V -18 dB -60 dB 2+2/-1 VDC 30 8 VDC +45 VDC 45 pF
VTO-8360 3600-4300 MHz 10 mW/+10 dBm 1.5 dB 0 to +65C 35 MHz 40 MHz 6 MHz/V -25 dB -60 dB 8 2 VDC 24 4 VDC +30 VDC 45 pF
VTO-8430 4300-5800 MHz 10 mW/+10 dBm 1.5 dB 0 to +65C 60 MHz 50 MHZ 6 MHz/V -25 dB -60 dB 1.0 VDC Min 20.0 VDC Max. +30 VDC 45 pF
VTO-8580 5800-6600 MHz 5 mW/+7 dBm 1.5 dB 0 to +65C 70 MHz 70 MHz 8 MHz/V -25 dB -60 dB 5 2.5 VDC 24+3/-5 VDC +30 VDC 45 pF
-95 dBc/Hz -102 dBc/Hz +15 VDC 50 mA TO-8V
-100 dBc/Hz -108 dBc/Hz +15 VDC 50 mA TO-8V
-90 dBc/Hz -97 dBc/Hz +15 VDC 50 mA TO-8V
-85 dBc/Hz -92 dBc/Hz +15 VDC 50 mA TO-8V
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Electrical and Performance Specifications
Guaranteed Specifications @ 25C Case Temperature (0 to +65C Operating Temperature)
Part Number Frequency Range, Min. Power Output Into 50-ohm load, Min. Power Output Variation @ 25C., Max. Operating Case Temperature Range Frequency Drift Over Operating Temperature, Typ. Pulling Figure (12 dB Return Loss), Typ. Pushing Figure, +15 VDC Supply, Typ. Harmonics, Below Carrier, Typ. Spurious Output Below Carrier, Min. Tuning Voltage Low Frequency High Frequency Maximum Tuning Voltage Tuning Port Capacitance, Nom. Phase Noise, Single Sideband, 1 Hz Bandwldth, Typ. 50 kHz From Carrier 100 kHz From Carrier Input Power 1% Regulation Voltage, Nom. Current, Max. Case Style VTO-8650 6500-8600 MHz 10 mW/+10 dBm 1.5 dB 0 to +65C 100 MHz 15 MHz 10 MHz/V -20 dB -60 dB 2 1 VDC 20 5 VDC 30 VDC 26 pF VTO-8810 8100-9100 MHz 10 mW/+10 dBm 1.5 dB 0 to +65C 110 MHz 8 MHz 12 MHz/V -15 dB -60 dB 2 VDC Min. 16 VDC Max. +30 VDC 26 pF VTO-8850 8500-9600 MHz 10 mW/+10 dBm 1.5 dB 0 to +65C 110 MHz 10 MHz 15 MHz/V -25 dB -60 dB 5 2 VDC 13 5 VDC +30 VDC 26 pF VTO-8950 9500-10500 MHz 10 mW/+10 dBm 1.5 dB 0 to +65C 160 MHz 20 MHz 10 MHz/V -20 dB -60 dB 4 1 VDC 10 VDC Max. +15 VDC 26 pF
-80 dBc/Hz -88 dBc/Hz +15 VDC 50 mA TO-8V
-80 dBc/Hz -88 dBc/Hz +15 VDC 100 mA TO-8V
-82 dBc/Hz -90 dBc/Hz +15 VDC 100 mA TO-8V
-73 dBc/Hz -80 dBc/Hz +15 VDC 100 mA TO-8V
Schematic
+15 V
Output Matching Series Feedback
RF Output
Varactor V Tune Tuning Port Capacitor Resonator
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Typical Performance @ 25C Case Temperature
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Typical Performance (Continued)
POWER OUTPUT, dBm LOG (f), dBc/Hz
13 12 11 10 12 11 TUNING CURVE 10 9 8 0 2 4 6 8 10 12 TUNING VOLTAGE, VDC 14 MODULATION SENSITIVITY -20 -40 -60 -80 -100 -120 -140 -160 10k 100k 1M 1k FOURIER FREQUENCY, Hz 10M POWER OUTPUT 800 600 400 200 0 16 8650 8240 8950
MODULATION SENSITIVITY, MHz/V
FREQUENCY, GHz
Figure 14. Noise Comparison Single Sideband Phase Noise.
Figure 13. VTO-8950 Power Output, Frequency and Modulation Sensitivity vs. Tuning Voltage.
TO-8V Case Drawing
.18 .017 +.002 -.001 .150 TYP .300 TYP GROUND
RF OUT 3 .50 DIA .45 DIA .300 TYP .150 TYP 2 4 1 CASE GROUND .22 MIN V TUNE V+ GLASS RING .060 DIA TYP (3X)
APPROXIMATE WEIGHT 1.7 GRAMS
NOTES (UNLESS OTHERWISE SPECIFIED): 1. DIMENSIONS ARE SPECIFIED IN INCHES 2. TOLERANCES: xx .02 xxx .010
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Test Fixtures for TO-8 Packages (TF 801/802) Oscillators (VTO)
Features
* DC to 11 GHz Frequency Range * Connectorized Tuning Port and RF Output * Easy to Test Package * Repeatable Performance
Description
To facilitate testing and prototyping of products in the TO-8V package, a series of test fixtures is available. Designated the HP TF Series test fixtures, they feature rugged construction for precise, repeatable measurements. The TF Series test fixtures come supplied with mounting hardware to ensure excellent ground contact between the oscillator package and test fixture. This assures excellent contact between package pins and test fixture connector pins for reliable testing. The device under test is aligned according to Figure 15, and pushed fully down onto the fixture. The steel mounting ring
TUNING VOLTAGE CONNECTOR POWER INPUT CONNECTOR
clamp is placed over the device under test and secured by machine screws prior to testing. Orientation of pins can be verified by comparison with part (c) of Figure 15. It is recommended that both machine screws be used to fasten the ring clamp. Screws should be tightened down snugly with a jewelers type screwdriver. For different connector options check the table in Figure 15 to identify the correct part numbers. It should be noted that some output power variation may be seen, from unit data, at frequencies above 8 GHz. This is due to small differences in lengths of test fixture RF output connector pins.
Applications
* Engineering Characterization * Incoming Inspection * System Prototype * Demonstration of Device Performance
.53 VTO IN PLACE
.35 + TUNING VOLTAGE PIN .35
TUNING VOLTAGE
DCPIN VDC
.83 GROUND .20 .55 .65 (a) RFOUT .15 .70 (b) .45
.35
GROUND RFOUT (c) + TUNING VOLTAGE .300 TYP
GROUND TAB ON PACKAGE
CONNECTOR OPTIONS TUNING VOLTAGE SMA SMA RF OUTPUT SMA TYPE N .45
.150 TYP
GROUND 3 2 4 CASE GROUND RFOUT
SERIES TF-801 TF-802
1 +DC VOLTAGE
.150 TYP
(Bottom View)
Figure 15. TO-8 Test Fixture.
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