TDA6048-5X Datasheet | Siemens Semiconductor Group

Features q High input sensitivity q Low distortion for AM-sound application q AM detector is alignmentfree q Few external ponents q Selectable IF inputs low crosstalk q Intercarrier output for quasi parallel sound application q All pins are ESD protected TDA 6048-5X Bipolar IC P-DSO-14-1 Type TDA 6048-5X Ordering Code Q67000-A5061 Package P-DSO-14-1 (SMD) Functional Description 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 difference frequency OFF ON ON Application For use in multistandard VCR- and TV sets. 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 TDA 6048-5X TDA 6048-5X Block Diagram 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...