NTE1570 (NPN Tuner) & NTE1572 (FET Tuner) Integrated Circuit TV Video IF, Sound IF

Transcription

1 NTE1570 (NPN Tuner) & NTE1572 (FET Tuner) Integrated Circuit TV Video IF, Sound IF Functions: PIF Three Controlled IF Amplifier Stages Video Demodulator Controlled by Picture Carrier Black Noise and White Noise Inverter Peak AGC DC Amplifier for RF AGC Out SIF Three Differential IF Amplifier Stages Phase Detector DC Controlled Attenuator Audio Amplifier Stage with NFB Terminal Features: PIF, SIF, ATT Audio Driver 2 Chip Color TV System is Possible with NTE1547 PIF High Gain, Wide Band IF Amplifier AGC Characteristics with Excellent Stability Excellent DG/DP Characteristics Excellent S/N Chracteristics due to Delayed 3 Stage AGC Action Negative Video Output Signal Switch Off the Video Part with VTR Switch SIF Excellent Limiter Charactristics Excellent Attenuato Characteristics Absolute Maximum Ratings: (T A = +25 C unless otherwise specified) Supply Voltage, V CC V Pin11 Open Voltage, V V Video DC Output Current, I mA Audio DC Output Current, I mA Pin2 Voltage, V V Power Dissipation, P D W Derate Above 25 C mW/ C Operating Temperature Range, T opr to +65 C Storage Temperature range, T stg to +150 C

2 Electrical Characteristics: (T A = +25 C, V CC = 12V, f p = 58.75MHz, f S = 54.25MHz) PIF Section Parameter Symbol Test Conditions Min Typ Max Unit Recommended Supply Voltage V CC V Supply Current I CC ma Video DC Output Voltage NTE1570 V 15 SW 1 : 2, SW 2 : V AFT DC Output Voltage NTE1570 V 13 SW 1 : 2, SW 2 : V NTE1570 V 14 SW 1 : 2, SW 2 : 2 AFT DC Offset Voltage NTE1570 V SW 1 : 2, SW 2 : V RF AGC Residual Output Voltage NTE1570 V 11(sat) SW 1 : 2, SW 2 : V RF AGC Leakage Current NTE1570 I 11(leak) SW 1 : 2, SW 2 : µa NTE1572 SW 1 : 1, SW 2 : 1 Video Sensitivity (Pin7 Pin8) v i Note µv rms AGC Range A PIF Note db Sync Tip Level Voltage (V 15 ) V SYNC Note V Maximum IF Input Voltage (PIF) i IN(MAX) Note mv rms White Noise Threshold Level (V 15 ) V WTH Note V White Noise Clamp Level (V 15 ) V WCL Note V Black Noise Threshold Voltage (V 15 ) V BTH Note V Black Noise Clamp Level (V 15 ) V BCL Note V Video Frequency Response f BW Note MHz Suppression of Carrier CL Note db Suppression of 2 nd Carrier I 2nd Note db 920kHz Beat Level I 920 Note db Differential Phase DP Note deg Differential Gain DG Note % PIF Input Impedance R IN(PIF) Note kω PIF Input Capacitance C IN(PIF) Note pf AFT Output Voltage Upper V 13U, V 14U Note V Lower V 13L, V 14L V

3 Electrical Characteristics (Cont d): (T A = +25 C, V CC = 12V, f p = 58.75MHz, f S = 54.25MHz) Parameter Symbol Test Conditions Min Typ Max Unit RF AGC Maximum Available Current NTE1570 I 4(max) SW 1 : 2, SW 2 : ma NTE1572 SW 1 : 1, SW 2 : ma RF AGC Delay Setting Range (Delay) V IN Note V AFT Band Width F W Note MHz Video Output Voltage v OUT Note V SIF Output Voltage S OUT Note mv rms SIF Section Input Limiting Voltage v IN(LIM) R D =, Note µv rms AM Rejection Ratio AMR SIF IN: f = 4.5MHz, f m = 400Hz, f = ±25kHz, AM: 30%, v in = 100dBµ Recovered Output Voltage V OD SIF IN: f = 4.5MHz, f m = 400Hz, f = ±25kHz, v in = 80dBµ, R D = 12kΩ Total Harmonic Distortion THD SIF IN: f = 4.5MHz, f m = 400Hz, f = ±25kHz, v in = 80dBµ db V rms 1.0 % Max. Audio Output Voltage v OM SIF IN: f = 4.4 to 4.6MHz 4.0 V P P SIF Input Impedance R IN(SIF) f = 4.5MHz kω SIF Input Capacitance C IN(SIF) f = 4.5MHz 3.0 pf DET Output Impedance R O(DET) Note kω DC Voltage, Pin21 NTE1570 V 21 SW 1 : 2, SW 2 : V V DC Voltage, Pin23 NTE1570 V 23 SW 1 : 2, SW 2 : V V DC Voltage, Pin1 NTE1570 V 1 SW 1 : 2, SW 2 : V V Max. Attenuation ATT MAX Note db DC Volume Gain G ATT MAX R A = db ATT Characteristics V 1 Note V Note V Signal Leakage v PT Note mv rms AF Amp Gain G V AF Note db AF Amp Distortion THD AF P 23A = 1V PP, 400Hz, SW 3 : ON, ATT: 26dB Setting 1.5 % AF Amp Max. Output Voltage v OAF MAX THD AF = 5%, Note V rms AF Output DC Voltage NTE1570 V 3 SW 1 : 2, SW 2 : V V

4 Notes: Note 1. V AGC (P5 EXT. Applying Voltage) = 11.5V, PIF IN: f = 58.75MHz 1kHz 30% AM Modulation. Adjust PIF input level (v i ) so that the detected output of P 15A with high impedance probe will be 0.8V P P and measure the input level. Note 2. V AGC = 4V. Measure PIF input level (v i ) same as Note 1. Note 3. PIF IN: f = 58.75MHz CW 15mV rms. Measure DC level of P 15. Note 4. PIF IN: f = 58.75MHz, APL 100%, 87.5% AM modulation. P 5 : Ppen. (1) Adjust PIF input level 50mV P P and measure the detected output level v 01P P. (2) Then increase the input level so that the detected output level will be 1.1 x v 01P P and measure the input level. Note 5. V AGC = 8V. PIF IN: 58.75MHz ±10MHz variable or sweep 15mV rms measure DC level of P 15. Note 6. V AGC = 8V (GR = 30dB). SG 1 : 58.75MHz CW, SG 2 : to 40MHz variable. (1) Setting output of SG 1 so that DC level of P 15 will be 4V. (2) Setting output of SG 2 (58.65MHz) so that AC level of P 15 will be 0.5V P P. (3) Decreaseing frequency of SG 2 until AC level of P 15 will be 0.35V P P ( 3dB of 0.5V P P ) then read f SG2 = F, f BW = F MHz Note 7. SG 1: 58.75MHz, 1kHz 80% AM modulation 100mV rms. SG 2, SG 3 : OFF. Setting V AGC so that output AC level of P 15 will be 2.7V P P. Measure CL of P 15 after setting to 0% AM of SG 1. Note 8. Measure I 2nd of P 15 same as Note 7. Note 9. V AGC = 8V. SG 1 : 58.75MHz (P = Picture) 100mV rms. SG 2 : 54.25MHz (S = Sound) 32mV rms ( 10dB of SG 1 ). SG 3 : 55.17MHz (C = Chroma) 32mV rms ( 10dB of SG 1 ). (1) Seting V AGC so that the output tip level (lower) of P 15 will be 3V DC. (2) Measure the level difference (db) between c level and 920kHz level. Note10. V AGC = 8V. PIF IN: f = 58.75MHz video signal (ramp) 87,5% AM 100mV P P. Setting ATT so that the sync tip level of P 15 will be 2.5V DC. Measure DP and DG. Note 11. V AGC = 5V, f = 58.75MHz. Measure R IN, C IN. Note12. AFT sensitivity F/ (V 13 V 14 ) (1) INT, AGC (P 5 Open) (2) PIF Input: 58.75MHz ±1MHz, CW 15mV rms. (3) Read the frequency (f 1 ) of PIF when V 13 V 14 = 1V. (4) Read the frequency (f 2 ) of PIF when V 13 V 14 = 1V. Then calculate F/ (V 13 V 14 ) = f 1 f 2 Note13. F W, V 13U, V 14U, V 13L, V 14L (1) INT AGC (P 5 Open) (2) PIF IN: 58.75MHz ±10MHz CW 15mV rms (3) 9pF at Pin16 should b shorted (4) Read the frequency (f 1 or f 2 ) when the V 5 or V 6 reduced to 90% level of A or B with varing the frequency. Then band width is the difference from center requency (f 0 ). Note14. P 5 : Open. PIF IN: 58.75MHz CW 20mV rms. (1) Adjust the voltage of Pin3 so that the voltage of Pin4 will be 6V DC. (2) Measure the volatge at Pin3. Note15. P 5 : Open. PIF IN: 58.75MHz, 100% APL 87.5% AM modulation signal amplitude 50mV P P. Measure detected output voltge (White peak to sync tip). Note16. P 5 : Open. SG 1 : 58.75MHz CW 100mV rms. SG 2 : 54.25MHz CW 25mV rms. Measure SIF (4.5MHz) output voltage at P 15. Note17. SIF IN: f = 4.5MHz, FM f MOD = 400Hz, f = ±25kHz. (1) Adjust SIF input level 100mV P P and measure the detected output level v OS. (2) Then decrease the input level so that the detected output level will be 3dB down of v OS and measure the input level.

5 Notes (cont d): Note18. Output Impedance (1) SIF IN: f = 4.5MHz, FM f MOD = 400Hz, f = ±25kHz, 80dBµ. (2) At P 23 read the V O1 at R X =, then read the R X when recovered output become V O1 /2 with varying the R X. The R X is the output impedance. Note19. ATT MAX. (1) SIF IN: f = 4.5MHz, FM f MOD = 400Hz, f = ±25kHz, 80dBµ. (2) Read the 400Hz component of V A1 at P 2 with R A = 0, then read V A1 with R A =. Note20. v PT(1) SIF IN: f = 4.5MHz, FM fmod = 400Hz, f = ±25kHz, 80dBµ. (2) Read the 400Hz component at P 3. Note21. G V AF (1) Apply 400Hz 0.1V rms signal to P 2. (2) Read the output voltage at P 3. Note22. Read the 400Hz component of V A1 at P 2 with R A = 0. Set R A so that V A1 = 1/2V A1 ( 6dB), then read DC voltage of Pin1 (V 1 ). Note23. Read the 400Hz component of V A1 at P 2 with R A = 0. Set R A so that V A1 = 3.16 x 10 3 V A1 ( 50dB), then read DC voltage of Pin1 (V 1 ). Pin Connection Diagram Volume Control 1 24 SIF Detector NFB 2 23 De Emphasis Audio Output 3 22 SIF Detector Audio GND 4 21 SIF Input IF AGC Filter/ 5 20 V VCR Switch CC PIF Input 6 19 AFT Tank PIF Input 7 18 Video Tank PIF Input 8 17 Video Tank PIF Input 9 16 AFT Tank RF AGC Delay Video Output RF AGC Output AFT Output 2 PIF GND AFT Output (33.02) Max.520 (13.2).225 (5.73) Max.100 (2.54) (27.94).126 (3.22) Min.600 (15.24)