Varactor-Tuned Oscillators
Technical Data
VTO-8000 Series
Features
• 600 MHz to 10.85 GHz
Coverage
• Fast Tuning
• +7 to +13 dBm Output
Power
•
±1.5
dB Output Flatness
• Hermetic Thin-film
Construction
Description
Agilent Technologies’s VTO-8000
Series oscillators use a silicon
transistor chip as a negative
resistance oscillator. The oscilla-
tion frequency is determined by a
silicon abrupt varactor diode
acting as a voltage-variable
capacitor in a thin-film micro-
stripline 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 Agilent
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 micro-
stripline PC board. They are ideal
for most compact, lightweight
commercial and military equip-
ment 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
3
RF OUT
2
1
4
TUNE
+DC
VOLTAGE
CASE GROUND
Applications
Frequency agile systems, such as
digitally controlled receivers and
active jamming transmitters often
use externally linearized
varactor-tuned oscillators.
Agilent oscillators are monotonic
making external linearization
easy using analog (opamp) or
digital (EPROM) linearizing
techniques. The Agilent 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 excel-
lent tuning speeds. Used in a
phase locked loop PLL circuit, a
VTO provides a receiver LO with
stability equivalent to the refer-
ence 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.
2
Electrical and Performance Specifications
Guaranteed Specifications @ 25°C Case Temperature (0° to +65°C Operating Temperature)
Part Number
Frequency Range, Min.
Power Output into 50–ohm Load,Min.
Power Output Variation @ 25°C, 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 +65°C
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 +65°C
0° to +65°C
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 +65°C
0° to +65°C
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 @25°C., 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
* +5 VDC supply
VTO–8240
2400–3700 MHz
10 mW/+10 dBm
±1.5
dB
0° to +65°C
30 MHz
35 MHz
6 MHz/V
–18 dB
–60 dB
2+2/–1 VDC
30±8 VDC
+45 VDC
45 pF
VTO-8248
2488 MHz
+8 dBm
N/A
0° to +65°C
10 MHz
2 MHz
* 6 MHz/V
–20 dB
–60 dB
4 VDC
8 VDC
+10 VDC
23 pF
VTO-8360
3600–4300 MHz
10 mW/+10 dBm
±1.5
dB
0° to +65°C
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 +65°C
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 +65°C
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
–105 dBc/Hz
–115 dBc/Hz
+5 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
3
Electrical and Performance Specifications
Guaranteed Specifications @ 25°C Case Temperature (0° to +65°C Operating Temperature)
Part Number
VTO–8650
VTO–8810
8100–9100 MHz
10 mW/+10 dBm
±1.5
dB
0° to +65°C
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 +65°C
110 MHz
10 MHz
15 MHz/V
–25 dB
–60 dB
5±2 VDC
13±5 VDC
+30 VDC
26 pF
VTO–8950
VTO-810750
Frequency Range, Min.
6500-8600 MHz
Power Output Into 50–ohm load, Min.
10 mW/+10 dBm
Power Output Variation @ 25°C., Max.
±1.5
dB
Operating Case Temperature Range
0° to +65°C
Frequency Drift Over Operating
100 MHz
Temperature, Typ.
Pulling Figure (12 dB Return Loss), Typ.
15 MHz
Pushing Figure, +15 VDC Supply, Typ.
10 MHz/V
Harmonics, Below Carrier, Typ.
–20 dB
Spurious Output Below Carrier, Min.
–60 dB
Tuning Voltage
Low Frequency
2±1 VDC
High Frequency
20±5 VDC
Maximum Tuning Voltage
30 VDC
Tuning Port Capacitance, Nom.
26 pF
Phase Noise, Single Sideband,
1 Hz Bandwldth, Typ.
50 kHz From Carrier
–80 dBc/Hz
100 kHz From Carrier
–88 dBc/Hz
Input Power
±1%
Regulation
Voltage, Nom.
+15 VDC
Current, Max.
50 mA
Case Style
TO–8V
9500–10500 MHz 10650–10850 MHz
10 mW/+10 dBm 10 mW/+10 dBm
±1.5
dB
±1.5
dB
0° to +65°C
0° to +65°C
160 MHz
130 MHz
20 MHz
10 MHz/V
–20 dB
–60 dB
4±1 VDC
10 VDC Max.
+15 VDC
26 pF
10 MHz
5 MHz/V
–20 dB
–60 dB
4 VDC Min.
6 VDC Max.
+15 VDC
26 pF
–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
–77 dBc/Hz
–85 dBc/Hz
+15 VDC
100 mA
TO–8V
Schematic
+15 V
Output Matching
Series Feedback
RF Output
Varactor
V Tune
Tuning
Port
Capacitor
Resonator
4
Typical Performance @ 25ºC Case Temperature
POWER
OUTPUT, dBm
POWER
OUTPUT, dBm
17
16
15
14
15
14
13
12
11
1500
TUNING CURVE
1000
MODULATION
SENSITIVITY
0
8
16
24
32
40
TUNING VOLTAGE, VDC
48
POWER OUTPUT
POWER OUTPUT
MODULATION
SENSITIVITY, MHz/V
1.1
1.0
.9
.8
.7
.6
.5
0
5
160
140
120
TUNING CURVE 100
80
60
MODULATION
40
SENSITIVITY
20
10 15 20 25 30 35 40
TUNING VOLTAGE, VDC
45 50
FREQUENCY,
GHz
FREQUENCY,
MHz
125
500
25
Figure 1. VTO–8060 Power Output, Frequency
and Modulation Sensitivity vs. Tuning Voltage.
Figure 2. VTO–8080 Power Output, Frequency
and Modulation Sensitivity vs. Tuning Voltage.
POWER
OUTPUT, dBm
POWER
OUTPUT, dBm
15
14
13
1.6
1.5
1.4
1.3
1.2
1.1
1.0
.9
.8
0
5
10
15 20
POWER OUTPUT
100
90
80
70
60
50
40
30
20
10
15
14
13
POWER OUTPUT
MODULATION
SENSITIVITY, MHz/V
TUNING CURVE
2.5
2.0
1.5
0
5
10 15 20
MODULATION
SENSITIVITY
25 30
35 40
180
160
TUNING CURVE 140
120
100
80
60
MODULATION
40
SENSITIVITY
20
25 30 35 40
45 50
45 50
TUNING VOLTAGE, VDC
TUNING VOLTAGE, VDC
Figure 3. VTO–8090 Power Output, Frequency
and Modulation Sensitivity vs. Tuning Voltage.
POWER
OUTPUT, dBm
POWER
OUTPUT, dBm
Figure 4. VTO–8150 Power Output, Frequency
and Modulation Sensitivity vs. Tuning Voltage.
14
13
12
11
10
3500
3000
2500
2000
1500
0
8
16
24
POWER OUTPUT
14
13
12
11
POWER OUTPUT
MODULATION
SENSITIVITY, MHz/V
FREQUENCY,
MHz
TUNING CURVE
FREQUENCY,
GHz
4.0
3.5
3.0
2.5
0
5
10
15 20
TUNING CURVE
160
120
80
MODULATION
SENSITIVITY
32
40
48
50
MODULATION
SENSITIVITY
25 30
35 40
40
45 50
TUNING VOLTAGE, VDC
TUNING VOLTAGE, VDC
Figure 5. VTO–8200 Power Output, Frequency
and Modulation Sensitivity vs. Tuning Voltage.
Figure 6. VTO–8240 Power Output, Frequency
and Modulation Sensitivity vs. Tuning Voltage.
MODULATION
SENSITIVITY, MHz/V
250
MODULATION
SENSITIVITY, MHz/V
FREQUENCY,
GHz
FREQUENCY,
GHz
MODULATION
SENSITIVITY, MHz/V
5
Typical Performance
(Continued)
POWER
OUTPUT, dBm
10
9
8
MODULATION
SENSITIVITY
POWER
OUTPUT, dBm
11.5
11.0
10.5
4.3
4.2
4.1
4.0
3.9
3.8
3.7
3.6
3.5
5
10
15
20
POWER OUTPUT
POWER OUTPUT
2530
2520
2510
2500
2490
2480
2470
0
TUNING CURVE
2
4
6
8
TUNING VOLTAGE, VDC
90
TUNING CURVE 80
70
60
MODULATION 50
40
SENSITIVITY
30
20
10
25
30
10
TUNING VOLTAGE, VDC
Figure 7. VTO–8248 Power Output, Frequency
and Modulation Sensitivity vs. Tuning Voltage.
Figure 8. VTO–8360 Power Output, Frequency
and Modulation Sensitivity vs. Tuning Voltage.
POWER
OUTPUT, dBm
13
12
11
10
9
6500
5500
4500
3500
0
8
16
24
POWER
OUTPUT, dBm
POWER OUTPUT
13
12
11
10
7.0
6.5
6.0
5.5
0
POWER OUTPUT
TUNING CURVE
MODULATION
SENSITIVITY
32
40
250
48
TUNING VOLTAGE, VDC
140
TUNING CURVE 120
100
80
MODULATION
60
SENSITIVITY
40
20
0
5
10
15
20
25
TUNING VOLTAGE, VDC
Figure 9. VTO–8430 Power Output, Frequency
and Modulation Sensitivity vs. Tuning Voltage.
POWER
OUTPUT, dBm
14
13
12
11
10
8
FREQUENCY,
GHz
7
6
5
4
0
2
4
MODULATION
SENSITIVITY
Figure 10. VTO–8580 Power Output, Frequency
and Modulation Sensitivity vs. Tuning Voltage.
POWER
OUTPUT, dBm
POWER OUTPUT
1000
TUNING CURVE
800
600
400
200
15
14
13
10
9
8
7
6
5
0
4
POWER OUTPUT
MODULATION
SENSITIVITY, MHz/V
1200
TUNING CURVE
600
MODULATION
SENSITIVITY
8
12
16
TUNING VOLTAGE, VDC
0
20
0
6 8 10 12 14 16 18 20 22
TUNING VOLTAGE, VDC
Figure 11. VTO–8650 Power Output, Frequency
and Modulation Sensitivity vs. Tuning Voltage.
Figure 12. VTO–8810 Power Output, Frequency
and Modulation Sensitivity vs. Tuning Voltage.
MODULATION
SENSITIVITY, MHz/V
FREQUENCY,
GHz
MODULATION
SENSITIVITY, MHz/V
1000
MODULATION
SENSITIVITY, MHz/V
FREQUENCY,
MHz
FREQUENCY,
GHz
MODULATION
SENSITIVITY, MHz/V
9
8
7
6
5
4
3
2
1
MODULATION
SENSITIVITY, MHz/V
FREQUENCY,
MHz
FREQUENCY,
GHz
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
