INTEGRATED CIRCUITS SA5205A Wide-band high-frequency amplifier Product specification Replaces data of February 24, 1992 IC17 Data Handbook Philips Semiconductors 1997 Nov 07
Philips Semiconductors Product specification Wide-band high-frequency amplifier SA5205A DESCRIPTION PIN CONFIGURATIONS The SA5205A family of wideband amplifiers replace the SA5205 family. The ‘A’ parts are fabricated on a rugged 2µm bipolar process featuring excellent statistical process control. Electrical performance is nominally identical to the original parts. D Packages The SA5205A is a high-frequency amplifier with a fixed insertion gain of 20dB.
Philips Semiconductors Product specification Wide-band high-frequency amplifier SA5205A EQUIVALENT SCHEMATIC VCC R1 R2 Q3 VOUT Q6 Q2 R3 VIN Q1 Q4 RE2 RF1 RE1 Q5 RF2 SR00216 Figure 2. Equivalent Schematic ABSOLUTE MAXIMUM RATINGS SYMBOL PARAMETER RATING UNIT VCC Supply voltage 9 V VAC AC input voltage 5 VP-P TA Operating ambient temperature range -40 to +85 °C PDMAX Maximum power dissipation, TA=25°C (still-air)1, 2 D package 780 mW SA grade NOTES: 1.
Philips Semiconductors Product specification Wide-band high-frequency amplifier SA5205A DC ELECTRICAL CHARACTERISTICS VCC=6V, ZS=ZL=ZO=50Ω and TA=25°C in all packages, unless otherwise specified. SYMBOL PARAMETER VCC Operating supply voltage range ICC Supply current S21 Insertion gain S11 Input return loss S22 Output return loss S12 Isolation TEST CONDITIONS Over temperature 5 5 Over temperature 20 19 f=100MHz Over temperature 17 16.
Philips Semiconductors Product specification SA5205A 11 10 9 8 7 6 5 4 3 2 1 0 –1 –2 –3 –4 –5 –6 35 34 32 30 OUTPUT LEVEL—dBm SUPPLY CURRENT—mA Wide-band high-frequency amplifier TA = 25oC 28 26 24 22 20 18 16 5 5.5 6 6.5 7 7.
Philips Semiconductors Product specification Wide-band high-frequency amplifier SA5205A 2.0 10 1.9 TA = 25oC VCC = 6V INPUT VSWR 1.7 –15 ISOLATION—dB 1.8 . 1.6 1.5 1.4 ZO = 75Ω 1.3 VCC = 6V ZO = 50Ω TA = 25oC –20 –25 1.2 ZO = 50Ω 1.1 1.0 101 –30 2 4 6 8 102 2 4 6 8 103 101 2 4 6 8 102 2 4 6 8 103 FREQUENCY—MHz FREQUENCY—MHz SR00225 SR00226 Figure 11. Input VSWR vs Frequency Figure 14. Isolation vs Frequency (S12) 2.0 25 1.9 INPUT VSWR 1.
Philips Semiconductors Product specification Wide-band high-frequency amplifier SA5205A where RE1=12Ω, VBE=0.8V, IC1=5mA and IC3=7mA (currents rated at VCC=6V). THEORY OF OPERATION The design is based on the use of multiple feedback loops to provide wide-band gain together with good noise figure and terminal impedance matches.
Philips Semiconductors Product specification Wide-band high-frequency amplifier SA5205A output pins of the device. This circuit is shown in Figure 18. Follow these recommendations to get the best frequency response and noise immunity. The board design is as important as the integrated circuit design itself. POWER DISSIPATION CONSIDERATIONS When using the part at elevated temperature, the engineer should consider the power dissipation capabilities.
Philips Semiconductors Product specification Wide-band high-frequency amplifier SA5205A 50Ω System 75Ω System 25 25 vcc = 8v ISOLATION GAIN—dB INSERTION GAIN—dB vcc = 8v vcc = 7v 20 vcc = 6v 15 vcc = 5v vcc = 7v 20 vcc = 6v vcc = 5v 15 ZO = 75Ω TA = 25oC ZO = 50Ω TA = 25oC 10 101 10 101 2 4 6 8 102 2 4 6 8 103 2 4 8 102 2 4 6 8 103 b. Insertion Gain vs Frequency (S21) 10 10 –15 –15 ISOLATION—dB ISOLATION—dB a.
Philips Semiconductors Product specification Wide-band high-frequency amplifier SA5205A The most important parameter is S21. It is defined as the square root of the power gain, and, in decibels, is equal to voltage gain as shown below: 1dB from its low power value. The decrease is due to nonlinearities in the amplifier, an indication of the point of transition between small-signal operation and the large signal mode.
Philips Semiconductors Product specification Wide-band high-frequency amplifier SA5205A 2.0 2.0 1.9 INPUT VSWR 1.7 1.9 TA = 25oC VCC = 6V 1.8 OUTPUT VSWR 1.8 . 1.6 1.5 1.4 1.3 ZO = 75Ω 1.2 1.1 1.0 101 Tamb = 25oC VCC = 6V 1.7 1.6 1.5 1.4 1.3 ZO = 75Ω 1.2 ZO = 50Ω 2 ZO = 50Ω 1.1 4 6 8 102 2 FREQUENCY—MHz 4 1.0 101 6 8 103 2 a. Input VSWR vs Frequency 4 6 8 102 2 FREQUENCY—MHz 4 b. Output VSWR vs Frequency 6 8 103 SR00235 Figure 21.
Philips Semiconductors Product specification Wide-band high-frequency amplifier SA5205A SO8: plastic small outline package; 8 leads; body width 3.
Philips Semiconductors Product specification Wide-band high-frequency amplifier SA5205A DEFINITIONS Data Sheet Identification Product Status Definition Objective Specification Formative or in Design This data sheet contains the design target or goal specifications for product development. Specifications may change in any manner without notice. Preliminary Specification Preproduction Product This data sheet contains preliminary data, and supplementary data will be published at a later date.
