 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| Multistandard Sound IF with Vision Carrier Input TDA 6048-5X Preliminary Data Bipolar IC Features q q q q q q q High input sensitivity Low distortion for AM-sound application AM detector is alignmentfree Few external components Selectable IF inputs low crosstalk Intercarrier output for quasi parallel sound application All pins are ESD protected P-DSO-14-1 Type TDA 6048-5X Functional Description Ordering Code Q67000-A5061 Package P-DSO-14-1 (SMD) Multistandard sound IF with two selectable IF inputs. The selection between the two IF inputs is made by applying ground to a special IF-select pin, or by leaving it in a high impedance state. Both IF inputs are symmetrical inputs. There are two possible ways of processing the select sound IF: An audio frequency signal is available after amplifying and demodulating a selected AM sound IF signal (e.g. L standard). For applications with quasi parallel sound a selected FM-sound IF is mixed with a picture carrier which is applied symmetrically to a picture carrier input stage (e.g. B/G standard). The difference of both, picture carrier and FM-sound IF, is available for further processing. A three-level switch defines the activating of the AM- and/or FM-signal path. So, three modes of operating are possible: AM sound ON OFF ON Application For use in multistandard VCR- and TV sets. difference frequency OFF ON ON Semiconductor Group 82 06.94 TDA 6048-5X Pin Functions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Function IF input 1 IF input 1 AGC-time constant AM-sound output AM / DF switch Difference frequency output Reference bypass Picture carrier input Picture carrier input Ground + VS supply voltage IF-input switch IF input 2 IF input 2 Semiconductor Group 83 TDA 6048-5X Block Diagram Semiconductor Group 84 TDA 6048-5X Circuit Description This circuit selects one of two sound IF-input signals by applying ground or low level to pin 12 (sound IF2 is chosen) or by leaving it open (sound IF1 is chosen). The following IF amplifier consists of four capacitively coupled stages. A quasi synchronous detector provides in case of AM operation the audio frequency on pin 4. Furthermore, the detector supplies a regulation voltage to control the gain of the IF amplifier (AGC). In case of FM operation, the amplified IF signal is branched and multiplied with a regenerated picture carrier, so that on pin 6 the difference signal of both is available. The picture carrier has to be applied symmetrically to pin 8 and 9. The three possible modes of operation are determined by the voltage level that is applied to pin 5. Semiconductor Group 85 TDA 6048-5X Absolute Maximum Ratings TA = 0 to 70 C Parameter Power supply Junction temperature Storage temperature Thermal resistance (system-air) Symbol Limit Values min. max. 14 150 - 40 125 125 V C C K/W without additional copper on the pc board for better heat dissipation 0 Unit Remarks V11 Tj Tstg Rth SA V12 - V10 V5 - V10 Operating Range Supply voltage Ambient temperature during operation IF-frequency range - 3 dB 5 5 V V V11 TA 10.8 0 13.2 70 80 3.3 V C MHz V fSoundIF 12 V3 - V10 Semiconductor Group 86 TDA 6048-5X AC/DC Characteristics TA = 25 C; VS = 12 V Parameter Total current Static Characteristics AGC Voltage Min. AGC Max. AGC AGC-Time Constant Charge current Discharge current Charge current with quick charge Symbol min. Limit Values typ. 35 max. 44 mA 27 Unit Test Condition I I11 V3 V3 0 2.6 0.5 2.85 1.0 3.5 V V V1/2/V13/14 = 45 Vrms V1/2/V13/14 = 175 mVrms I3 I3 I3 - 3.5 1.2 1.2 - 1.7 - 0.6 A A mA Integral mean value control Integral mean value control V3 = 0.5 V V3 = 2.8 V VIF = 0 V Signal step > 20 dB IF inputs V1/2, V13/14 FM-sound IF output difference frequency Input current AM/DF switch Output current AM/DF switch Input current IF select Input current IF select 5.7 6 2.6 6.3 V V V6 I5 I5 I12 I12 215 175 270 220 165 - 240 365 300 A A A A V5 = 6 V V5 = 0 V V12 = 5 V V12 = 0 V Dynamic Characteristics Min sound IF-input voltage (min. AGC) Max. sound IF-input voltage (max. AGC) IF-control range FM-sound IF output voltage AF output voltage in AM operation V1/2/V13/14 V1/2/V13/14 V 60 140 66 140 500 V mV dB mV mV V6 = - 3 dB V8/9 > 50 mV V6 = + 3 dB V8/9 > 50 mV V1/2 = V13/14 = 10 mV V8/9 > 50 mV V1/2 = V13/14 = 10 mV m = 80 % V6rms V4 Semiconductor Group 87 TDA 6048-5X AC/DC Characteristics (cont'd) Parameter Total harmonic distortion in AM operation Crosstalk Symbol min. Limit Values typ. 0.3 1 max. % % dB Unit Test Condition THD4 V1/2 = V13/14 = 1 mV m > 30 % m > 80 % a1/2/a13/14 50 Design Notes for FM Operation Input resistance symmetrical Input capacitance symmetrical R1/2 = R13/14 1.5 C1/2 = C13/14 1.5 2 2 2.5 5 k pF Intercarrier signal to noise ratio (weighted according to CCIR 468) fSC = 5.5 MHz with transmitting sound carrier - 13 dB S/N S/N FuBk-test picture FuBk-test picture Output resistance Noise figure S/N S/N tbf tbf tbf tbf 150 5 dB dB dB dB dB V1/2 = V13/14 = 10 mV FuBk V1/2 = V13/14 = 10 mV 2.753-MHz mod. with detuning f = - 400 kHz with detuning f = + 400 kHz V1/2 = V13/14 = 50 dBV RG = 800 R6 F Semiconductor Group 88 TDA 6048-5X Test Circuit Semiconductor Group 89 TDA 6048-5X Application Circuit Semiconductor Group 90 |
Price & Availability of TDA6048-5X
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |