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PDF ADA-4643 Data sheet ( Hoja de datos )
| Número de pieza | ADA-4643 | |
| Descripción | Silicon Bipolar Darlington Amplifier | |
| Fabricantes | Hewlett-Packard | |
| Logotipo |  |
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Agilent ADA-4643
Silicon Bipolar Darlington Amplifier
Data Sheet
Description
Agilent Technologies’ ADA-4643
is an economical, easy-to-use,
general purpose silicon bipolar
RFIC gain block amplifiers
housed in a 4-lead SC-70
(SOT-343) surface mount plastic
package which requires only half
the board space of a SOT-143
package.
The Darlington feedback struc-
ture provides inherent broad
bandwidth performance, result-
ing in useful operating frequency
up to 2.5 GHz. This is an ideal
device for small-signal gain
cascades or IF amplification.
ADA-4643 is fabricated using
Agilent’s HP25 silicon bipolar
process, which employs a double-
diffused single polysilicon
process with self-aligned
submicron emitter geometry. The
process is capable of simulta-
neous high fT and high NPN
breakdown (25 GHz fT at 6V
BVCEO). The process utilizes
industry standard device oxide
isolation technologies and
submicron aluminum multilayer
interconnect to achieve superior
performance, high uniformity,
and proven reliability.
Surface Mount Package
SOT-343
Pin Connections and
Package Marking
RFout
& Vd
GND
GND RFin
Note:
Top View. Package marking provides orientation
and identification.
“2T” = Device Code
“x” = Date code character
identifies month of manufacture.
Typical Biasing Configuration
Rc
=
Vcc - Vd
Id
VCC = 5 V
Rc C bypass
RF
input
C block
2Tx
RFC
Vd = 3.5 V
C block
RF
output
Features
• Small Signal gain amplifier
• Operating frequency DC – 2.5 GHz
• Unconditionally stable
• 50 Ohms input & output
• Flat, Broadband Frequency
Response up to 1 GHz
• Operating Current: 20 to 60 mA
• Industry standard SOT-343 package
• Lead-free option available
Specifications
900 MHz, 3.5V, 35 mA (typ.)
• 17 dB associated gain
• 13.4 dBm P1dB
• 28.3 dBm OIP3
• 4 dB noise figure
• VSWR < 2.2 throughput operating
frequency
• Single supply, typical Id = 35 mA
Applications
• Cellular/PCS/WLL base stations
• Wireless data/WLAN
• Fiber-optic systems
• ISM
Attention:
Observe precautions for
handling electrostatic
sensitive devices.
ESD Machine Model (Class A)
ESD Human Body Model (Class 1B)
Refer to Agilent Application Note A004R:
Electrostatic Discharge Damage and Control.
1 page  
ADA-4643 Typical Scattering Parameters, TA = 25°C, Id = 27 mA
Freq.
GHz
S11
Mag. Ang.
S21
dB Mag. Ang.
S12
Mag. Ang.
S22
Mag. Ang.
K
0.1
0.172
1.1
0.5
0.202
10
0.9
0.277
12.3
1.0
0.286
9.9
1.5
0.349
-2.8
1.9
0.375
-11.3
2.0
0.382
-13.8
2.5
0.397
-24.2
3.0
0.402
-34.7
3.5
0.394
-46
4.0
0.378
-58.7
4.5
0.361
-73.1
5.0
0.340
-89.3
5.5
0.328
-107.1
6.0
0.318
-124.8
6.5
0.299
-141.1
7.0
0.274
-159.7
7.5
0.243
177.3
8.0
0.222
148.7
8.5
0.226
119.9
9.0 0.26 95.4
9.5
0.305
75.2
10.0
0.356
60.1
17.2
17.04
16.67
16.56
15.98
15.54
15.44
14.93
14.47
14.02
13.58
13.16
12.64
12.15
11.6
11.09
10.56
9.96
9.29
8.41
7.62
6.67
5.82
7.246
7.113
6.814
6.726
6.292
5.984
5.918
5.581
5.29
5.021
4.775
4.55
4.284
4.05
3.803
3.584
3.371
3.149
2.914
2.632
2.406
2.155
1.954
175.9
160.2
144.7
141.1
124.2
111.4
108.3
93.2
78.6
64.2
50
35.9
21.9
8.3
-5.4
-18.6
-32
-45.6
-59.1
-71.8
-83.7
-96.1
-107.1
0.093
0.091
0.088
0.087
0.083
0.080
0.08
0.078
0.078
0.079
0.082
0.087
0.094
0.102
0.112
0.124
0.138
0.150
0.161
0.168
0.177
0.187
0.195
-0.8
-4.5
-7.4
-7.9
-9.3
-9.5
-9.5
-8.9
-7.8
-6.6
-5.4
-4.6
-4.9
-5.9
-8.3
-11.5
-16.5
-22.8
-30
-36.7
-43
-49.9
-57.3
0.245
0.245
0.269
0.274
0.28
0.273
0.271
0.249
0.22
0.192
0.176
0.179
0.191
0.212
0.233
0.25
0.27
0.3
0.337
0.381
0.429
0.481
0.529
-4.1
-12.6
-20.4
-23.1
-37.6
-48.9
-51.7
-65.8
-81.7
-100.9
-123.8
-148.6
-169.9
173.3
158.2
141.6
123
103.6
84.8
70.1
58.4
48.4
39.7
1.1
1.1
1.1
1.1
1.1
1.2
1.2
1.2
1.3
1.3
1.3
1.3
1.3
1.2
1.2
1.1
1.1
1.1
1.1
1.1
1.1
1.1
1
Notes:
1. S-parameters are measured on a microstrip line made on 0.025 inch thick alumina carrier. The input reference plane is at the end of the input lead. The
output reference plane is at the end of the output lead.
5
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