CT T ODU CEMEN 7 R P E A 74 T L 7 E OL REP 00-442OBS ENDED 8 1 m s.co MM ions ECO pplicat p@harri R O N ral A centap Cent : Call or email May 1999 [ /Title (CA30 88E) /Subject (AM Receiv er Subsystem and GeneralPurpose Amplifier Array) /Autho r () /Keywords () /Creator () /DOCI NFO pdfmark CA3088E AM Receiver Subsystem and General-Purpose Amplifier Array Features Description • Excellent Overload Characteristics 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. • AGC for IF Amplifier • Buffered Output Signal for Tuning Meter 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. • 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 Part Number Information PART NUMBER CA3088E TEMP. RANGE (oC) -40 to 85 PACKAGE 16 Ld PDIP 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. PKG. NO. E16.3 Pinout CA3088E (PDIP) TOP VIEW [ /PageMode /UseOutlines /DOCVIEW pdfmark 16 AUDIO V+ CONV. BYPASS 1 15 AUDIO OUT CONV. IN 2 14 AUDIO IN CONV. OUT 3 13 RF AGC 1ST IF IN 4 GND 5 12 TUNING METER 11 AGC FILTER 1ST IF OUT 6 2ND IF FB 7 10 2ND IF V+ 2ND IF IN 8 9 DET. OUT CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. Copyright © Harris Corporation 1999 8-23 File Number 560.2 CA3088E Absolute Maximum Ratings TA = 25oC Thermal Information 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 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 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 TA = 25oC, V+ = 12V PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS Voltage (Figure 1) V1, V4, V9, V11 Terminals 1, 4, 9, 11 - 0.7 - V V2, V7, V8 Terminals 2, 7, 8 - 1.4 - V V10 Terminal 10 - 5.6 - V V12 Terminal 12 - 0 - V V15 Terminal 15 - 3.5 - V I3 Terminal 3 - 0.35 - mA I6 Terminal 6 - 1.0 - mA I10 Terminal 10 - 20 - mA I13 Terminal 13 - 0 - mA I16 Terminal 16 - 1.2 - mA 30% Modulation - 75 - mVRMS f = 1kHz - 30 - dB Audio Distortion (Figure 2) VOUT = 100mV - 0.2 - % Sensitivity (fIN = 1MHz, Signal-to-Noise Ratio (S/N) = 20dB)) At Converter Stage Input (Figure 2) - 200 - µV/m At RF Stage Input (Figure 2) - 100 - µV/m Current (Figure 1) DYNAMIC CHARACTERISTICS Detector Output (Figure 2) Audio Amplifier Gain (Figure 2) AAF Total Harmonic Distortion (Figure 2) THD 30% Modulation - 1.0 - % Input Resistance (No AGC, fIN = 1MHz) RIN At Transistor Q1 - 3500 - Ω At Transistor Q5 - 2000 - Ω Input Capacitance (No AGC, fIN = 1MHz) CIN At Transistor Q1 - 17 - pF At Transistor Q5 - 12 - pF Feedback Capacitance (No AGC, fIN = 1MHz) CFB At Transistor Q1 - 1.5 - pF At Transistor Q5 - 1.5 - pF 8-24 CA3088E V+ = 12V 1 0.1µF 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 0.1µF CA3088E 330Ω 5kΩ 5kΩ 2kΩ 1kΩ FIGURE 1. TEST CIRCUIT FOR DC CHARACTERISTICS 100 200 150 V+ = 9V 0.05µF 0.05µF OSC. TUNING 130pF 3 0.02 0.05 0.039 4 6 7 2000 10 8 0.01 10K GANG 9 2 0.05 CONVERTER 2ND IF AMPL. AND DET. IF AMPLIFIER TO RF STAGE OF ANTENNA TO DETECTOR FILTER AND AUDIO (OPTIONAL TONE CONTROL MAY BE SHUNTED FROM TERMINAL 9 TO GROUND) CA3088E 25 TO TUNING 12 METER METER OUTPUT 14 1 AUDIO PREAMPLIFIER 0.01 AGC TO RF AMPLIFIER FROM DETECTOR FILTER AUDIO 15 OUTPUT 13 RF AGC 5600 IF AGC 25 6800 5 SUBSTRATE 50 11 16 V+ = 9V 10 NOTE: Resistance values are in Ω. Capacitance values in µF, except as noted. FIGURE 2. FUNCTIONAL BLOCK DIAGRAM OF THE CA3088E 8-25 1500 CA3088E CONVERTER INPUT BYPASS CONVERTER 3 1 OUTPUT 1ST IF AMPLIFIER 4 6 OUTPUT INPUT 10 R15 5K CONVERTER INPUT Q5 Q1 2 V+ 2ND IF AMPLIFIER 8 INPUT Q7 200 Q10 Q12 Q9 R13 5K R8 4K R2 2K R16 5K R14 5K 5.6V R1 6.8K R3 4K D1 D2 D4 R18 6K Q14 AUDIO 15 OUTPUT Q8 Q13 Q11 ALL RESISTANCE VALUES ARE IN OHMS R7 1.5K R11 R17 200 5.5K 2.2K R6 2K 5 R9 1K SUBSTRATE SECOND IF FEEDBACK 200 R21 5.6K R5 7 R19 R4 700 Q3 R20 1.2K 6.8K Q4 D3 200 Q6 Q2 DETECTOR OUTPUT 16 V+ R12 4.7K Z1 9 R10 220 D5 13 AGC OUTPUT 11 FOR OPTIONAL RF STAGE 12 TO TUNING METER AGC FILTER FIGURE 3. SCHEMATIC DIAGRAM OF THE CA3088E 8-26 14 AUDIO INPUT FROM DETECTOR FILTER