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| NTE1231 & NTE1231A Integrated Circuit Complete 4 Watt TV Sound Channel Description: Capable of carrying out all of the functions of a TV sound channel, the NTE1231 and NTE1231A silicon monolithic integrated circuits consist of a six-stage IF amplifier/limiter, low-pass filter, differential peak detector, DC volume control, regulated power supply, audio preamplifier, and output stage. The audio power amplifier will deliver 4W of low-distortion audio to a 16 load with a supply of 24V. When used with a 12V supply, such as is found in many portable TV sets, these devices will furnish 1.5W to an 8 loud speaker. The NTE1231 is supplied in a quad in-line plastic package with a copper lead frame. This device is designed to use the printed wiring board on which it is mounted for heat dissipation. The NTE1231A is furnished in a 16-Lead DIP package with heat-sink contact tabs. The webbed lead configuration (Pin4 & Pin5, Pin12 & Pin13) allows an inexpensive heat sink to be easily attached for increased power dissipation capability and yet permits the use of a standard IC socket or printed wiring board hole layout. Features: D High Sensitivity D High AM Rejection D DC Volume Control D High Power Output D Low Distortion D Wide Operating Voltage Range: 9V to 28V D Low Quiescent Current Drain Absolute Maximum Ratings: Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28V Repetitive Peak Output Current, IOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5A Power Dissipation, PD Tpins = +90C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3W TA = +70C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1W Junction Temperature Range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 to +150C Electrical Characteristics: (TA = +25C, fo = 4.5MHz, fm = 400Hz, fd = 7.5kHz, VCC = 12V, RL = 8, Vin = 1mV unless otherwise specified) Parameter Quiesecnt Output Voltage Quiescent Supply Current Input Limiting Threshold AM Rejection Signal-to-Noise Ratio Recovered Audio Output Distortion Output Power Power Supply Rejection Input Resistance Input Capacitance Symbol VOUT ICC VTH AMR S + N/N Vout THD POUT PSR Rin Cin Vin = 0 RX = 22k, Vin = 0 RX = 0 fd = 25kHz, m = 0.3 POUT = 0.5W, fd = 25kHz RX = 0 POUT = 50mW THD = 2%, fd = 25kHz THD = 10%, fd = 25kHz f = 120Hz, RX = 22k, RL = 4 Test Conditions Min 5.1 - - 40 50 - - - - - - - Typ 6.0 19 40 55 65 120 1.0 1.4 1.5 46 30 5 Max 6.9 33 100 - - - - - - - - - Unit V mA V dB dB mV % W W dB k pF Electrical Characteristics: (TA = +25C, fo = 4.5MHz, fm = 400Hz, fd = 7.5kHz, VCC = 24V, RL = 16, Vin = 1mV unless otherwise specified) Parameter Quiesecnt Output Voltage Quiescent Supply Current Input Limiting Threshold AM Rejection Signal-to-Noise Ratio Recovered Audio Output Distortion Output Power Power Supply Rejection Input Resistance Input Capacitance Symbol VOUT ICC VTH AMR S + N/N Vout THD POUT PSR Rin Cin Vin = 0 RX = 22k, Vin = 0 RX = 0 fd = 25kHz, m = 0.3 POUT = 1W, fd = 25kHz RX = 0 POUT = 50mW THD = 2%, fd = 25kHz THD = 10%, fd = 25kHz f = 120Hz, RX = 22k, RL = 4 Test Conditions Min 11 11 - 40 50 - - - - - - - Typ 12 22 40 55 65 120 0.75 3.5 4.2 46 30 5 Max 13 35 100 - - - - - - - - - Unit V mA V dB dB mV % W W dB k pF Pin Connection Diagram IF Input IF Decoupling IF Decoupling 1 2 3 NTE1231 FM Detector FM Detector DC Volume Control 4 5 6 9 8 7 AF Output Compensation AF Feedback 12 DE-Emphasis 11 Ripple Rejection 10 VCC IF Input IF Decoupling IF Decoupling GND GND FM Detector FM Detector DC Volume Control 1 2 3 4 5 6 7 8 NTE1231A 16 DE-Emphasis 15 Ripple Rejection 14 VCC 13 GND 12 GND 11 AF Output 10 Compensation 9 AF Feedback NTE1231 .247 (6.27) 12 7 .677 (17.2) 1 6 .770 (19.5) Max .260 (6.6) .233 (5.9) Max .100 (2.54) .700 (17.78) .099 (2.5) Min NTE1231A 16 9 .260 (6.6) Max 1 8 .785 (19.9) Max .200 (5.08) Max .245 (6.22) Min .300 (7.62) .100 (2.54) .700 (17.7) |
Price & Availability of NTE1231
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