Agilent ADA-4543
Silicon Bipolar Darlington Amplifier
Data Sheet
Features
• Small Signal gain amplifier
• Operating frequency DC – 2.5 GHz
Description
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.
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-4543 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 f
T
and high NPN
breakdown (25 GHz f
T
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
• Unconditionally stable
• 50 Ohms input & output
• 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
RFout
& Vd
GND
Specifications
900 MHz, 3.4V, 15 mA (typ.)
• 15.1 dB associated gain
• 1.9 dBm P
1dB
RFin
1Tx
GND
• 15 dBm OIP
3
• 3.7 dB noise figure
• VSWR < 2 throughput operating
frequency
• Single supply, typical I
d
= 15 mA
Applications
• Cellular/PCS/WLL base stations
• Wireless data/WLAN
V
CC
=
5
V
C
bypass
Note:
Top View. Package marking provides orientation
and identification.
“1T” = Device Code
“x” = Date code character
identifies month of manufacture.
Typical Biasing Configuration
V -V
Rc = cc d
Id
R
c
• Fiber-optic systems
• ISM
RFC
C
block
RF
input
1Tx
C
block
V
d
= 3.4 V
RF
output
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.
AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
