CA2111A HARRIS | Alldatasheet

Document overview

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Technical content

Features

  • Provision for Output from 3-Stage IF Amplifier Section
  • Low Harmonic Distortion
  • Quadrature Detection Permits Simplified Single-Coil Tuning
  • Extremely Low AFC Voltage Drift Over Full Operating Temperature Range
  • Minimum Number of External Components Required

Applications

  • FM IF Sound
  • TV Sound IF

Description

The CA2111A provides a multistage wideband amplifier- limiter, a quadrature detector, and an emitter-follower output stage. This device is designed for use in FM receivers and in the sound IF sections of TV receivers. In addition, an output terminal is provided which allows the use of the amplifier- limiter as a straight 60dB wideband amplifier. The amplifier-limiter features the excellent limiting character- istic of 3 cascaded differential amplifiers. The quadrature detector requires only one coil in the associated outboard circuit and therefore, tuning is a simple procedure. A unique feature of the CA2111A is its exceptionally low AFC voltage drift over the full operating-temperature range. Pinout CA2111A (PDIP) TOP VIEW Block Diagram Part Number Information PART NUMBER TEMP. RANGE ( oC) PACKAGE PKG. NO. CA2111AE -40 to 85 14 Ld PDIP E14.3 AUDIO OUT REF BIAS NC IF IN DC FB BYPASS INPUT BYPASS GROUND DE-EMPHASIS QUADRATURE INPUT QUADRATURE IN BUF HIGH IF OUTPUT LOW IF OUTPUT NC AMPLIFIER- LIMITER QUADRATURE DETECTOR EMITTER FOLLOWER 1 C 1 120pF 14µH 3pF 0.003µF 0.1µF0.1µF 51Ω BIAS +12V [ /Title (CA21 11A) /Sub- ject (FM IF Ampli- fier- Limiter and Quadra ture Detec- tor) /Autho r () /Key- words (Har- ris Semi- con- ductor, FM IF ampli- fier, quadrat ure detec- tor, lim- iter, TV audio IF, high AM rejec- tion, OBSOLETE PRODUCT NO RECOMMENDED REPLA CEMENT Call Central Applications 1-800-442-7747or email: centapp@harris.com

Absolute Maximum Ratings TA =2 5oC Thermal Information Operating Conditions Thermal Resistance (Typical, Note 1) θJA (oC/W) 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. NOTES: 1. θJA is measured with the component mounted on an evaluation PC board in free air. Electrical SpecificationsTA = 25oC Unless Otherwise Specified PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS Terminal 1 DC Voltage V1 V+ = 12V - 5.4 - V V+ = 8V - 3.7 - V Terminals 4, 5, 6, 10 DC VoltageV4, 5, 6, 10V+ = 8V - 1.35 - V Terminals 2, 12 DC Voltage V2, 12 V+ = 8V - 3.5 - V Supply Current, Pin 13 I13 V+ = 8V -1 4- m A V+ = 12V -1 6- m A Amplifier Input Resistance R 4 fO = 10.7MHz -7-k Ω Amplifier Input Capacitance C 4 -1 1- p F Detector Input Resistance R 12 -7 0- k Ω Detector Input Capacitance C 12 - 2.7 - pF Amplifier Output Resistance R 10 -6 0- Ω Detector Output Resistance R 1 - 200 - Ω De-emphasis Resistance R 14 - 8.8 - k Ω DYNAMIC CHARACTERISTICS fO = 10.7MHz,Δf =±75kHz, V+ = 8V, FM Modulation Frequency = 400Hz, Source Resistance = 50Ω Input Limiting Threshold VoltageVI(LIM) - 400 600 µVRMS AM Rejection AMR VI= 10mVRMS , 100% FM, 30% AM -3 7- d B Amplifier Voltage Gain AV VI= 50µVRMS -5 5- d B Detector Recovered Audio Output VO(AF) VI= 10mVRMS - 0.3 - V RMS Total Harmonic Distortion THD VI= 10mVRMS -1- % DYNAMIC CHARACTERISTICS fO = 10.7MHz,Δf =±75kHz, V+ = 12V, FM Modulation Frequency = 400Hz, Source Resistance = 50Ω Input Limiting Threshold VoltageVI(LIM) - 400 600 µVRMS AM Rejection AMR VI= 10mVRMS , 100% FM, 30% AM -4 5- d B Amplifier Voltage Gain AV VI= 50µVRMS -5 5- d B Detector Recovered Audio Output VO(AF) VI= 10mVRMS - 0.48 - V RMS Total Harmonic Distortion THD VI= 10mVRMS -1- % DYNAMIC CHARACTERISTICS fO = 4.5MHz,Δf =±25kHz, V+ = 12V, FM Modulation Frequency = 400Hz, Source Resistance = 50Ω Input Limiting Threshold VoltageVI(LIM) - 250 400 µVRMS AM Rejection AMR VI= 10mVRMS , 100% FM, 30% AM -3 6- d B CA2111A

Amplifier Voltage Gain AV VI= 50µVRMS -6 0- d B Detector Recovered Audio Output VO(AF) VI= 10mVRMS - 0.72 - V RMS Total Harmonic Distortion THD VI= 10mVRMS - 1.5 - % DYNAMIC CHARACTERISTICS fO = 5.5MHz,Δf =±50kHz, V+ = 12V, FM Modulation Frequency = 400Hz, Source Resistance = 50Ω Input Limiting Threshold VoltageVI(LIM) - 250 400 µVRMS AM Rejection AMR VI= 10mVRMS , 100% FM, 30% AM -4 0- d B Amplifier Voltage Gain AV VI= 50µVRMS -6 0- d B Detector Recovered Audio Output VO(AF) VI= 10mVRMS - 1.2 - V RMS Total Harmonic Distortion THD VI= 10mVRMS -3- % Electrical SpecificationsTA = 25oC Unless Otherwise Specified (Continued) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS 0.1µF 0.1µF 51Ω 0.1µF 2kΩ 0.1µF 0.1µF 50µF NOTE C 1 C 2 R 1 C 3 AM/FM SIGNAL GENERATOR AC VTVM DISTORTION ANALYZER 2 12 NOTE: Input to the quadrature coil can be from either terminal 9 or terminal 10. Terminal 9 is normally used because it lessens the possibility of overloads during tuning. The use of terminal 10 increases the limiting sensitivity significantly and has been used successfully in these tests. COMPONENT VALUES DETECTOR TRANSFER CHARACTERISTICS ƒ L

1 C 1 R 1 QC 2 C 3 UPPER

MHz µHp F k Ω -p F µF MHz MHz 4.5 14 120 20 30 3 0.003 4.58 4.42 5.5 8 100 20 30 3 0.003 5.63 5.37 CA2111A

FIGURE 2. AM REJECTION vs INPUT VOLTAGE (AT 4.5MHz) FIGURE 3. AM REJECTION vs INPUT VOLTAGE (AT 5.5MHz)