U2510B-M Atmel, U2510B-M Datasheet
U2510B-M
Specifications of U2510B-M
Related parts for U2510B-M
U2510B-M Summary of contents
Page 1
... Excellent AFC Performance (Level Controlled, Both Polarities Available) Description The U2510B is an integrated bipolar one-chip AM/FM radio circuit. It contains an FM front-end with preamplifier and demodulator, a complete AM receiver amplifier and a mode switch for AM, FM and tape. This circuit is designed for clock radios and portable radio-cassette recorders ...
Page 2
... Figure 1. Block Diagram FM RF tank FM antenna front end BPE AGC 11 FM AGC front end ant osc. tank Voltage stab. and V mode control Ref U2510B 2 FM osc. IF BPE tank AFC FM IF amp. AFC control AM IF amp. and detect AGC RF AGC AM AGC AM/ ...
Page 3
... MUTE FM-DISCR VOL CTRL IN 4 AMOSC 5 6 FM-AFC FMOSC 7 VREF 8 FMTANK 9 AMTANK 10 11 FM-AGC FMIN 12 13 FE-GND AM/FM 14 IFOUT AF-GND 28 AFOUT RIPPLE AFIN AM/FM DETECT 23 22 VAGC/AFC 21 AFC SWITCH IF-GND 20 LED DRIVE 19 VTREBLE IN 18 FM-IFIN 17 AM-IFIN 16 MODE CTRL 15 SWITCH U2510B 3 ...
Page 4
... Audio amplifier input. The input resistance is approximately 100 k , the coupling capacitor (C 24 AFIN low frequency response Ripple filter connection. The load capacitance (C 25 RIPPLE IN ripple rejection U2510B 4 ), mute depth and threshold are adjustable by load resistance ( determines the AFC characteristic 19 ). Loading this pin by a resistor (to GND) will increase the FM AGC 20 ...
Page 5
... 2 0 2.4 2.4 2 1.2 1.2 1 1.5 1 1.5 1 1.5 1.5 1 2.7 2.7 2 3.0 3.0 3 1.2 1.2 1 U2510B TAPE - 1 1.0 - 2.6 2.6 2.6 2.4 2.4 2 2.4 - 2.4 2.4 2 5 0.7 - 2.4 2.4 2 1.2 1.2 1.2 1.5 1.2 - 1.5 1 ...
Page 6
... Hz, S hum Noise voltage THD = 10 4 output power Distortion mW Section dBµ MHz measuring range: 300 kHz front-end voltage gain Recovered audio voltage Detector output resistance Note: 1. U2510B-M_T: maximum 6 V U2510B 6 Symbol tot T amb Pin = AM FM Tape (pin 27 kHz o = Tape log ( ...
Page 7
... Detector output distortion V = 105 dBµV i1 (S+N)/ sensitivity (S+N)/ (S+N)/ AGC figure of merit referred V = 105 dBµV, voltage drop -10 dB Daf Daf IF input resistance LED current Oscillator voltage Note: 1. U2510B-M_T: maximum 6 V 4759A–AUDR–03/04 Pin 2 kHz 30 455 kHz, m iIF = AM test point ...
Page 8
... U2510B 8 Figure 3. Quiescent Current 10 T amb Figure 4. AF Section amb 0 0.01 Figure 5. AF Section: Distortion kHz T = 25°C amb 25° Tape (V) S without treble control with treble control = 25°C 100 0 (kHz 10000 10 100 1000 P (mW) o 4759A–AUDR–03/04 ...
Page 9
... Figure 6. AF Section: Maximum Output Power 10000 1000 100 Figure 7. AF Section: Supply-voltage Rejection Ratio Figure 8. FM Section: Mute Voltage 2.0 1.6 1.2 100 k 0 0 kHz 25°C amb ( 200 100 200 mV hum 25°C amb ( 25°C amb 120 100 V (dBµV) i U2510B 9 ...
Page 10
... U2510B 10 Figure 9. AM Section: Demodulator Output Level 0 -20 -40 -60 - 80%) -100 -20 0 Figure 10. Volume Control Range Characteristics 0 -20 Treble Voltage V -40 -60 -80 0 Figure 11. AM/FM Level Indicator Current S 80 1.6 MHz kHz 25°C amb 30%) 120 100 V (dBµ MHz kHz 25°C amb ...
Page 11
... V = 1.6 MHz = 25°C 120 100 V (dBµ kHz MHz i2 S+ 22.5 kHz kHz 25°C amb AM kHz 22.5 kHz) 80 100 120 (dBµ dBµ MHz kHz ±22.5 kHz 25°C amb d 120 100 V (dBµV) i U2510B 11 ...
Page 12
... AM IFT 14 T 455 kHz iIF U2510B 12 Figure 15. AM Section: Audio Output Level 0 -20 -40 -60 -80 -100 - 150 µ 4.7 µ U2510B 10.7 MHz S 3 off LED 1 1 390 R 2 Tape 100 nF 10 µ LED S dBµ MHz kHz 80% T amb 120 20 ...
Page 13
... Figure 17 on page 15 shows a circuit diagram for low-end AM/AF radios using the U2510B. Figure 18 on page 16 shows a circuit diagram of an AM/AF radio for higher class designs using all possible options of the U2510B. The layout of the PC board, shown in Figure 19 on page 16, is suitable for both the circuit example shown in Figure 17 on page 15 and the circuit example shown in Figure 18 on page 16 ...
Page 14
... Design Hints U2510B 14 Option c) is very useful for applications in radio cassette-recorders, for instance. In TAPE mode, the AM/FM receiver blocks are completely switched off and the signal from the tape recorder can be fed to the audio amplifier's input directly. This saves quiescent current and makes the TAPE switching easy. However, to minimize switching noise by the mode switch, the following switch sequence should be chosen: AM, FM, TAPE ...
Page 15
... FM discriminator will lead to an increased signal-to-noise ratio at low signal levels as well higher demodulation distortion level asymmetrical AFC. Antenna 4.7 µ U2510B 10.7 MHz C AM 4.7 µ Volume 4.7 µ 220 µF 100 4.7 µF 470 µF U2510B 100 ...
Page 16
... Figure 18. Application Circuit (Upgraded), R Antenna FM BPF 1 AM IFT 14 T 455 kHz IFT 100 pF S Tape Figure 19. PC Board U2510B 16 Only if V > 4.7 µ U2510B 10.7 MHz LED µF Volume 2 5.6 pF 4.7 µ 220 µF 100 4.7 µF 470 µF IN Tape Treble ...
Page 17
... SFE10.7MA5 CFSK 107M1 CDA10.7MC1 HD22124 AM/ Air coil 0. 0.09 0. Manufacturer Soshin Electric Co. ® Murata Toko Murata Toko Murata Toko Pin 10 Pin bar antenna U2510B Type Manufacturer 7MC-7789N ® Toko 21K7-H5 ® Mitsumi 7TRS-8441 Toko L–5K7-H5 Mitsumi 7P A119 AC Toko 7P A119 AC Toko 17 ...
Page 18
... Ordering Information Extended Type Number U2510B-M Package Information Package SDIP28 Dimensions in mm U2510B 18 Package SDIP28 27.5 27.1 27.3 27.1 0.53 1.1 1.778 0.43 0.9 23.114 Remarks – 10.26 10.06 8.7 8.5 0.9 4.8 4.2 3.3 0.35 0.25 12.2 11.0 technical drawings ...
Page 19
... No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. ...