CA3088E

May 1999 T NT DUC PRO LACEME 747 ETE REP -7 OL -442 OBS ENDED -800 com 1 M ons arris. COM icati O RE ral Appl tapp@h N n Cent : ce Call or email CA3088E AM Receiver Subsystem and General-Purpose Amplifier Array [ /Title (CA30 88E) /Subject (AM Receiv er Subsystem and GeneralPurpose Amplifier Array) /Autho r () /Keywords () /Creator () /DOCI NFO pdfmark [ /PageMode /UseOutlines /DOCVIEW pdfmark Features • Excellent Overload Characteristics • AGC for IF Amplifier • Buffered Output Signal for Tuning Meter • Internal Zener Diode Provides Voltage Regulation • Two IF Amplifier Stages • Low-Noise Converter and First IF Amplifier • Low Harmonic Distortion (THD) • Delayed AGC for RF Amplifier • Terminals for Optional Inclusion of Tone Control • Operates from Wide Range of Power Supplies: V+ = 6V to 16V • Optional AC and/or DC Feedback on Wide-Band Amplifier • Array of Amplifiers for General-Purpose Applications • Suitable for Use With Optional External RF Stage, Either MOS or Bipolar • Related at: - Refer to AN6022 for Application Note Information Description The CA3088E, a monolithic integrated circuit, is an AM subsystem that provides the converter, IF amplifier, detector, and audio preamplifier stages for an AM receiver. The CA3088E also provides internal AGC for the first IF amplifier stage, delayed AGC for an optional external RF amplifier, a buffer stage to drive a tuning meter, and terminals facilitating the optional use of a tone control. Figure 2 is a functional diagram of the CA3088E. The signal from the low-noise converter is applied to the first IF amplifier and is then coupled to the second IF amplifier. This IF signal is then detected and externally filtered. The resultant audio signal is applied to an audio preamplifier. Optionally, a tone control circuit may be connected at the junction of the detector circuit and the audio preamplifier. The gain of the first IF amplifier stage is controlled by an internal AGC circuit. The CA3088E supplies a delayed AGC signal output for use with an external RF amplifier. A buffered output signal is also available for driving a tuning meter. A DC voltage, internally regulated by a Zener diode, supplies the second IF amplifier, the AGC and tuning meter circuits and may also be used with any other stage. The CA3088E features four independent transistor amplifiers, each incorporating internal biasing for temperature tracking. These amplifiers are particularly useful in generalpurpose amplifier, oscillator, and detector applications in a wide variety of equipment designs. Part Number Information PART NUMBER CA3088E TEMP. RANGE (oC) -40 to 85 PACKAGE 16 Ld PDIP PKG. NO. E16.3 Pinout CA3088E (PDIP) TOP VIEW CONV. BYPASS 1 CONV. IN 2 CONV. OUT 3 1ST IF IN 4 GND 5 1ST IF OUT 6 2ND IF FB 7 2ND IF IN 8 16 AUDIO V+ 15 AUDIO OUT 14 AUDIO IN 13 RF AGC 12 TUNING METER 11 AGC FILTER 10 2ND IF V+ 9 DET. OUT CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. Copyright © Harris Corporation 1999 File Number 560.2 8-23 CA3088E Absolute Maximum Ratings TA = 25oC Thermal Information Thermal Resistance (Typical, Note 1) θJA (oC/W) PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 Maximum Junction Temperature (Plastic Package) . . . . . . . 150oC Maximum Storage Temperature Range . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC Supply Voltage (Across Term. 5 and Terms. 3, 6, 13, 16, Respectively) . . . . . 16V Output Current Terminals 3, 6, 13, 16, (Respectively). . . . . . . . . . . . . . . . . 10mA Terminal 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30mA Operating Conditions Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to 85oC CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. NOTE: 1. θJA is measured with the component mounted on an evaluation PC board in free air. Electrical Specifications PARAMETER DC CHARACTERISTICS Voltage (Figure 1) TA = 25oC, V+ = 12V SYMBOL TEST CONDITIONS MIN TYP MAX UNITS V1, V4, V9, V11 V2, V7, V8 V10 V12 V15 Terminals 1, 4, 9, 11 Terminals 2, 7, 8 Terminal 10 Terminal 12 Terminal 15 Terminal 3 Terminal 6 Terminal 10 Terminal 13 Terminal 16 - 0.7 1.4 5.6 0 3.5 0.35 1.0 20 0 1.2 - V V V V V mA mA mA mA mA Current (Figure 1) I3 I6 I10 I13 I16 DYNAMIC CHARACTERISTICS Detector Output (Figure 2) Audio Amplifier Gain (Figure 2) Audio Distortion (Figure 2) Sensitivity (fIN = 1MHz, Signal-to-Noise Ratio (S/N) = 20dB)) Total Harmonic Distortion (Figure 2) Input Resistance (No AGC, fIN = 1MHz) Input Capacitance (No AGC, fIN = 1MHz) Feedback Capacitance (No AGC, fIN = 1MHz) THD RIN AAF 30% Modulation f = 1kHz VOUT = 100mV At Converter Stage Input (Figure 2) At RF Stage Input (Figure 2) 30% Modulation At Transistor Q1 At Transistor Q5 CIN At Transistor Q1 At Transistor Q5 CFB At Transistor Q1 At Transistor Q5 75 30 0.2 200 100 1.0 3500 2000 17 12 1.5 1.5 mVRMS dB % µV/m µV/m % Ω Ω pF pF pF pF 8-24 CA3088E V+ = 12V 0.1µF 1 2 3 4 5 6 7 8 0.1µF CA3088E 16 15 14 13 12 11 10 330Ω 5kΩ 2kΩ 5kΩ 1kΩ 9 FIGURE 1. TEST CIRCUIT FOR DC CHARACTERISTICS 200 0.05µF OSC. TUNING 3 GANG 2 0.05 CONVERTER TO RF STAGE OF ANTENNA IF AMPLIFIER 0.05µF 100 150 V+ = 9V 130pF 0.039 4 6 7 8 0.05 10 0.02 2000 0.01 10K 9 2ND IF AMPL. AND DET. TO DETECTOR FILTER AND AUDIO (OPTIONAL TONE CONTROL MAY BE SHUNTED FROM TERMINAL 9 TO GROUND) 25 CA3088E METER OUTPUT 1 0.01 AGC TO RF AMPLIFIER 13 RF AGC IF AGC AUDIO PREAMPLIFIER TO TUNING 12 METER 14 FROM DETECTOR FILTER 5600 AUDIO 15 OUTPUT 25 6800 5 SUBSTRATE 50 11 16 V+ = 9V 10 1500 NOTE: Resistance values are in Ω . Capacitance values in µF, except as noted. FIGURE 2. FUNCTIONAL BLOCK DIAGRAM OF THE CA3088E 8-25 CA3088E CONVERTER INPUT BYPASS CONVERTER 3 1 OUTPUT CONVERTER INPUT 2 Q1 Q5 Q7 Q9 R2 2K R8 4K R13 5K R16 5K R14 5K 1ST IF AMPLIFIER 4 INPUT 6 OUTPUT 2ND IF AMPLIFIER 8 INPUT R15 5K Q10 V+ 10 200 Q12 9 7 DETECTOR OUTPUT SECOND IF FEEDBACK 5.6V R1 6.8K R3 4K Q2 D1 D2 Q6 Z1 R12 4.7K 200 R19 Q14 6.8K R21 5.6K Q4 D3 D4 Q3 R7 1.5K R11 2.2K R6 2K R9 1K R10 220 D5 R17 200 Q8 Q11 Q13 R20 1.2K R18 6K 200 16 V+ AUDIO 15 OUTPUT R4 700 R5 5.5K ALL RESISTANCE VALUES ARE IN OHMS 5 SUBSTRATE 13 AGC OUTPUT 11 FOR OPTIONAL RF STAGE 12 AGC FILTER TO TUNING METER 14 AUDIO INPUT FROM DETECTOR FILTER FIGURE 3. SCHEMATIC DIAGRAM OF THE CA3088E 8-26