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U2510B Datasheet(PDF) 9 Page - ATMEL Corporation |
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U2510B Datasheet(HTML) 9 Page - ATMEL Corporation |
9 / 15 page U2510B Rev. A3, 23-Feb-01 9 (15) Test Circuit 14 15 16 17 18 U2510B 19 20 21 22 13 12 11 10 9 8 7 23 24 25 26 27 28 65 43 2 1 4.7 µF 18 pF C 24 100 pF C 25 C 8 68 nF C 23 150 kΩ R 3 S 6 A B C T 4 S 4 A B S 5 A B T 2 22 pF C 5 18 pF C 4 2.2 k Ω R 4 L 2 22 pF C 3 L 1 43 pF C 2 150 µH L A 5.6 pF C 19 4.7 µF C 7 C 6 22 nF 22 nF C 20 455 kHz CF 1 AM IFT BA BA S 1 CF 2 10.7 MHz 150 Ω R 5 C 24 100 nF R 6 100 Ω C 25 10 nF R 7 75 Ω R 8 50 Ω T 1 V i1 (50 Ω) V i2 (50 Ω) C 22 10 nF LED D 1 A B off S 3 C 9 10 nF R 1 390 Ω R 2 10 k Ω FM AM Tape S 2 C 21 10 nF 3 k Ω R 9 V iIF I LED 100 nF 10 µF C 14 C 10 10 nF C 11 V D V i3 C 12 470 µF C 13 10 µF 8 Ω/ 2 W R L V S V o GND 220 µF C 15 V mute 13913 Figure 16. Test circuit Application General The U2510B is a bipolar monolithic IC for use in radio sets, for example, headphone receivers, radio recorders and clock radios. The IC contains all AM, FM, AF and switching function blocks necessary to construct these kinds of radio receivers using only few components around the IC. In the design, special efforts were made to get good performance for all AM bands (short and long wave). The implementation of enhanced functions (options) makes it possible to improve the radio’s performance and to produce radios with interesting features. In this case few (external) parts have to be changed or added. By using all or some of the options offered by the U2510B different types or classes of radios can be designed to the customer ’s requirements with the same IC. One of the general advantages of using the U2510B is the fact that all receiver functions (including the options) are integrated and tested on a system level. Therefore, two additional cost-savings are achieved by: 1. Shorter development time through less technical problems and 2. Higher reproductivity and low reject level in the set production line. Another advantage, due to the technology of the U2510B, is the wide operating voltage range, espe- cially the upper limit (13 V). This feature allows the use of soft power supply for line powered radios which can also reduce the set’s total cost. |
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