Agilent ADA-4543
Silicon Bipolar Darlington Amplifier
Data Sheet
Features
• Small Signal gain amplifier
• Operating frequency DC – 2.5 GHz
• Unconditionally stable
• 50 Ohms input & output
Description
Surface Mount Package
SOT-343
Agilent Technologies’ ADA-4543
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.
• Flat, Broadband Frequency
Response up to 1 GHz
• Operating Current: 10 to 30 mA
• Industry standard SOT-343 package
• Lead-free option available
Pin Connections and
Package Marking
Specifications
900 MHz, 3.4V, 15 mA (typ.)
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
• 15.1 dB associated gain
• 1.9 dBm P1dB
RFout
& Vd
GND
RFin
GND
• 15 dBm OIP3
cascades or IF amplification.
• 3.7 dB noise figure
Note:
• VSWR < 2 throughput operating
frequency
Top View. Package marking provides orientation
and identification.
ADA-4543 is fabricated using
Agilent’s HP25 silicon bipolar
process, which employs a double-
diffused single polysilicon
“1T” = Device Code
“x” = Date code character
identifies month of manufacture.
• Single supply, typical Id = 15 mA
Applications
• Cellular/PCS/WLL base stations
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.
Typical Biasing Configuration
• Wireless data/WLAN
• Fiber-optic systems
• ISM
VCC
bypass
= 5 V
V
- V
d
cc
I
R
=
c
d
R
C
c
RFC
C
block
Attention:
RF
input
1Tx
RF
output
Observe precautions for
handling electrostatic
sensitive devices.
V
= 3.4 V
d
C
block
ESD Machine Model (Class A)
ESD Human Body Model (Class 1B)
Refer to Agilent Application Note A004R:
Electrostatic Discharge Damage and Control.