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Silicon Bipolar MMIC 2.5 GHz
Variable Gain Amplifier
Technical Data
Features
•Differential Input and Output Capability
•DC to 2.5 GHz Bandwidth;
3.4Gbits/s Data Rates
•High Gain: 24 dB Typical
•Wide Gain Control Range:
34Ê dBTypical
•6 V Bias
•5 V VGC Control Range, IGCÊ <3Ê mA
•Fast Gain Response: <10Ê nsec
Typical
•IVA-14208: Low Cost Plastic Surface Mount Package
•IVA-14228: Hermetic Ceramic Surface Mount Package
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30 |
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VGC < 3 V |
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20 |
3.75 V |
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10 |
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(dB) |
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4.0 V |
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GAIN |
0 |
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-10 |
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-20 |
5.0 V |
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-30 |
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0.1 |
1.0 |
3.0 |
FREQUENCY (GHz)
Figure 1. IVA-14228 Typical Variable Gain vs. Frequency and VGC at
VCC = 6 V,Tcase = 25°C.
Description
The IVA-14 series MMlCs are variable gain amplifiers. The IVA-14208 is housed in a miniature low cost plastic surface mount package. The IVA-14228 is housed in a miniature hermetic ceramic surface mount package. Both devices can be used in any combination of single-ended or differential inputs or outputs (see Functional Block Diagram). The lowest frequency of operation is limited only by the values of user selected blocking and bypass capacitors.
Typical applications include variable gain amplification or limiting for fiber optic systems (e.g. SONET) with data rates up to 3.4 Gbits/s, mobile radio and satellite receivers, millimeter wave receiver IF amplifiers and communications receivers.
The IVA series of variable gain amplifiers is fabricated using Hewlett-Packard’s 10 GHz fT,
25Ê GHz f ISOSAT™-1 silicon
MAX
bipolar process. This process uses nitride self-alignment, submicrometer lithography, trench isolation, ion implantation, gold metallization and polyimide intermetal dielectric and scratch protection to achieve excellent performance, uniformity and reliability.
IVA-14208
IVA-14228
IVA-14208
Plastic SO-8 Package
PIN 1
IVA-14228
Ceramic ‘28’ Package
PIN 1
Functional Block
Diagram and Pin
Configuration
PIN 1 |
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PIN 8 |
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PIN DESCRIPTION
1. |
INPUT + |
8. |
VGC |
2. |
V EE, AC GROUND |
7. |
OUTPUT + |
3. |
V EE, AC GROUND |
6. |
OUTPUT – |
4. |
INPUT – |
5. |
VCC |
IVA-14228 PACKAGE BOTTOM IS V EEAC GROUND.
6-185 |
5965-9975E |
IVA-14208, -14228 Absolute Maximum Ratings[1]
Symbol |
Parameter |
Units |
IVA-14208 |
IVA-14228 |
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VCC-VEE |
Device Voltage, Tcase = 25°C |
Volts |
12 |
12 |
Pin |
Input Power, Tcase = 25°C |
dBm |
13 |
13 |
VGC-VEE |
Control Voltage, Tcase = 25°C |
Volts |
10 |
10 |
Ti |
Junction Temperature+ |
°C |
150 |
200 |
Tstg |
Storage Temperature |
°C |
-65to+150 |
-65to+200 |
Pt |
Total Device Dissipation |
mW |
1000[2] |
1000[3] |
Thermal Resistance:
IVA-14208 Thermal Resistance Junction to Case[4]: θjc = 68°C/W
IVA-14228 Thermal Resistance Junction to Case[4]: θjc = 63°C/W
Notes:
1.Operation in excess of any one of these conditions may result in permanent damage to the device.
2.Tcase = 25°C. Derate at 14.7 mW/°C for Tcase > 82°C.
3.Tcase = 25°C. Derate at 15.9 mW/°C for Tcase > 137°C.
4.Tj=150°C.
IVA-14208, -14228 Guaranteed Electrical Specifications All measurements reflect single-ended (unbalanced) performance. Tcase = 25°C. VCC = 6 V, VEE = 0 V, VGC = 0 V, ZL = 50 Ω
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IVA-14208 |
IVA-14228 |
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Symbol |
Parameter |
Units |
Min. |
Typ. |
Max. |
Min. |
Typ. |
Max. |
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GP |
PowerGain(|S |2),f=1GHz |
dB |
20 |
24 |
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22 |
24 |
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21 |
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GP |
Gain Flatness, f = 0.05 to 2 GHz |
dB |
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± 1.2 |
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± 0.7 |
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f3dB |
3 dB Bandwidth |
GHz |
2.0 |
2.5 |
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2.2 |
2.5 |
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GCR |
Gain Control Range[2], f = 1 GHz, |
dB |
30 |
34 |
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30 |
34 |
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VGC = 0 to 5 V |
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ISO |
ReverseIsolation(|S |2),f=1GHz, |
dB |
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37 |
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40 |
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12 |
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VGC = 0 to 5 V |
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VSWR |
Input VSWR, f = 0.05 to 2.0 GHz, |
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2:1 |
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2:1 |
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VGC = 0 to 5 V |
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Output VSWR, f = 0.05 to 2.0 GHz, |
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2:1 |
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2.5:1 |
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VGC = 0 to 5 V |
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NF |
50 Ω Noise Figure, f = 1 GHz |
dB |
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9.0 |
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9.0 |
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PldB |
Output Power at 1 dB Gain, |
dBm |
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-2.0 |
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-2.0 |
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Compression f = 1 GHz |
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VOUT |
Pk-Pk Single-ended Output Voltage, |
mVpp |
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450 |
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450 |
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f = 1 GHz |
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IP3 |
Third Order Intercept Point, f = 1 GHz |
dBm |
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8 |
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8 |
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tD |
Group Delay, f = 1 GHz |
psec |
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450 |
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450 |
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Icc |
Supply Current |
mA |
28 |
38 |
48 |
28 |
38 |
48 |
Notes:
1.The recommended operating voltage range for these devices is 5 to 8 V. Typical performance as a function of voltage is shown in the graphs on the following pages.
2.The recommended gain control range for these devices for dynamic control is 0 to 4.2 V. Operation at gain control settings above 4.2 V may result in gain control increase rather than gain decrease. See figures 4 and 19.
6-186
IVA-14228 Typical Performance Curves
INPUT + |
V GC |
50
OUTPUT +
INPUT - |
V CC |
ALL C = 1000 pF
Figure 2. IVA-142X8 Connection Diagram Showing Balanced Inputs and Unbalanced Outputs. Inputs and Outputs May Be Either Balanced or Unbalanced.
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30 |
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VGC < 3 V |
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20 |
3.75 V |
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10 |
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(dB) |
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4.0 V |
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GAIN |
0 |
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-10 |
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-20 |
5.0 V |
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-30 |
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0.1 |
1.0 |
3.0 |
FREQUENCY (GHz)
Figure 3. IVA-14228 Gain vs.
Frequency and VGC; VCC = 6 V, Tcase = 25°C.
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30 |
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20 |
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GAIN |
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(dB) |
10 |
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GAIN |
0 |
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1dB |
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(dBm), |
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P |
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-10 |
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1dB |
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-20 |
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P |
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-30 |
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-40 |
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0 |
1 |
2 |
3 |
4 |
5 |
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VGC (VOLTS)
Figure 4. IVA-14228 P1dB and Gain vs. VGC; VCC = 6 V, Tcase = 25°C.
4:1 |
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3:1 |
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VSWR |
OUTPUT |
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2:1 |
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INPUT |
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1:1 |
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0.1 |
1.0 |
3.0 |
FREQUENCY (GHz)
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25 |
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(dB) |
20 |
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VGC = |
3.75 V |
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FIGURENOISE |
15 |
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10 |
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VGC = |
0 V |
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5 |
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0.1 |
1.0 |
3.0 |
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FREQUENCY (GHz)
Figure 5. IVA-14228 Noise Figure vs.
Frequency and VGC; VCC = 6 V, Tcase = 25°C.
3:1
OUTPUT
VSWR |
2:1 |
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INPUT
1:1 |
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0.1 |
1.0 |
3.0 |
FREQUENCY (GHz)
Figure 7. IVA-14228 VSWR vs. |
Figure 8. IVA-14228 VSWR vs. |
Frequency; VCC = 6 V, VGC = 0 V, Tcase = |
Frequency; VCC = 6 V, VGC = 5 V, Tcase = |
25°C. |
25°C. |
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4 |
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3 |
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(mA) |
2 |
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GC |
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I |
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1 |
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0 |
0 |
1 |
2 |
3 |
4 |
5 |
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VGC (VOLTS) |
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Figure 6. IVA-14228 IGC vs. VGC; |
VCC = |
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6 V, Tcase = 25°C. |
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500 |
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400 |
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(pS) |
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TIME DELAY |
300 |
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200 |
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100 |
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0.1 |
1.0 |
3.0 |
FREQUENCY (GHz)
Figure 9. IVA-14228 Group Delay vs.
Frequency; VGC = 0 V, VCC = 6 V, Tcase = 25°C.
6-187
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