U2510B Datasheet, PDF(9/15 Page) ATMEL Corporation – All-Band AM/FM Receiver and Audio Amplifier

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U2510B Datasheet, PDF (9/15 Pages) ATMEL Corporation – All-Band AM/FM Receiver and Audio Amplifier

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U2510B

Test Circuit

Vi1

(50 â¦)

Vi2

(50 â¦)

50 â¦

150 â¦

R6 C24

100 â¦ 100 nF

R7 C25

150 ÂµH

75 â¦ 10 nF

AM IFT

14 13 12

455 kHz

CF1

43 pF 22 pF

L1 L2

18 pF

2.2 kâ¦

C7 C6

4.7 ÂµF 22 nF

C19

5.6 pF

C20

22 nF

11 10 9

U2510B

22 pF A B

150 kâ¦

C25

C23

100

68 nF C B

4.7 ÂµF

C24

18 pF

S6 A

Vmute

15 16 17 18 19 20 21 22 23 24 25 26 27 28

CF2

B A S1 B A

C22

10.7 MHz

10 nF off B

10 nF

D1 LED

C15

390 â¦

ViIF

Tape

S2 FM 10 kâ¦

3 kâ¦

C21 AM

10 nF

C14

C10

C11

100 nF 10 ÂµF 10 nF

C12

C13

10 ÂµF 470 ÂµF

220 ÂµF

8 â¦/

ILED

Vi3

GND

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 radioâs 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 âs 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 setâs total cost.

Rev. A3, 23-Feb-01

9 (15)

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