Document
Agilent ADA-4743 Silicon Bipolar Darlington Amplifier
Data Sheet
Features • Small Signal gain amplifier
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Description Agilent Technologies’ ADA-4743 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 structure provides inherent broad bandwidth performance, resulting in useful operating frequency up to 2.5 GHz. This is an ideal device for small-signal gain cascades or IF amplification. ADA-4743 is fabricated using Agilent’s HP25 silicon bipolar process, which employs a doublediffused single polysilicon process with self-aligned submicron emitter geometry. The process is capable of simultaneous 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
• Operating frequency DC – 2.5 GHz • Unconditionally stable • 50 Ohms input & output • Flat, Broadband Frequency Response up to 1 GHz • Operating Current: 40 to 80 mA • Industry standard SOT-343 package • Lead-free option available Specifications 900 MHz, 3.8V, 60 mA (typ.) • 16.5 dB associated gain • 17.1 dBm P1dB • 32.6 dBm OIP3 • 4.2 dB noise figure • VSWR < 2 throughput operating frequency • Single supply, typical Id = 60 mA Applications • Cellular/PCS/WLL base stations • Wireless data/WLAN • Fiber-optic systems
VCC = 5 V
Pin Connections and Package Marking
RFout & Vd GND
GND
3Tx
RFin
Note: Top View. Package marking provides orientation and identification. “3T” = Device Code “x” = Date code character identifies month of manufacture.
Typical Biasing Configuration
V -V Rc = cc d Id Rc C bypass
• 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.
RFC C block RF input
3Tx
C block
Vd = 3.8 V
RF output
ADA-4743 Absolute Maximum Ratings [1] Symbol
Id Pdiss Pin max. Tj TSTG θjc
Parameter
Device Current Total Power Dissipation [2] RF Input Power Channel Temperature Storage Temperature Thermal Resistance [3]
Units
mA mW dBm °C °C °C/W
Absolute Maximum
90 370 20 150 -65 to 150 163
Notes: 1. Operation of this device above any one of these parameters may cause permanent damage. 2. Ground lead temperature is 25°C. Derate 6.1 mW/°C for TL >89°C . 3. Junction-to-case thermal resistance measured using 150°C Liquid Crystal Measurement method.
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ADA-4743 Electrical Specifications
TA = 25°C, Zo=50Ω, Pin = -25 dBm, Id = 60 mA (unless specified otherwise)
Symbol
Vd Gp ∆Gp F3dB VSMRin VSMRout NF P1dB OIP3 DV/dT
Parameter and Test Condition: Id = 60 mA, Zo = 50Ω
Device Voltage Id = 6.