GSG 勁力 半導体 Gunter Semiconductor GmbH TDA1574 EDITION 09/00 Car and Home Receiver Integrated FM tuner For inquiry please contact : China Tel: 0086-755-3200442 Fax: 0086-755-3355520 Hong Kong Tel : 00852-26190748 Fax: 00852-24948080 e-mail [email protected] Technical Data TDA1574 Edition 09/00 Integrated FM Tuner for Radio Receivers Short Description The integrated circuit contains all the function units needed for a VHF tuner with the exception of the RF pre stage. It is mainly applied in the RF section of car radios and home receivers. Package • DIP 18 24.8 ± 0.2 6.5 +0.2 -0.1 ≤ 2.54 ≥ 0.51 3.5 -0.5 +1.0 3.6 ≤ 5.1 +0.2 -0.1 ≤ 1.40 2.54 0.47 ±0.12 +0.09 0.25 M 0.27 -0.07 7.62 8.0 . . . 9.8 18 17 16 15 14 13 12 11 10 1 2 3 4 5 6 7 8 9 Pin Configuration 1 2 3 4 5 6 7 8 9 09/00 mixer input 1 mixer input 2 wideband information input ground reference voltage oscillator output oscillator input 1 oscillator input 2 buffered oscillator output 10 11 12 13 14 15 16 17 18 IF output standby switch narrow band information input IF input 1 IF input 2 supply voltage mixer output 1 mixer output 2 AGC-output 1 Block Diagram 10 10 n +V CC 82 p MIXER OUTPUT VOLTAGE 68 n1 5.5 300 5.5 RML IF INPUT VaM AGC NARROW BAND INFORMATION n2 17 ON 16 IF OUTPUT 15 12 TUNER V iIF OFF 22 n 11 14 22 n 13 300 V p IF AMPLIFIER - 300 + + V ref + 50µA OUTPUT 100 AGC 300 0.5 V + V aIF 22 n + = - IF OUTPUT VOLTAGE 10 STAND BY SWITCH 18 - 5 VOLTAGE STABILIZER V p 4.1 V 10 n 10 k 22 n + 200 + - = AGC-VOLTAGE GENERATION 950 BUFFERED OSCILLATOR OUTPUT 9 1.7V + 1n OSCILLATOR OUTPUT BUFFERS 75 + DOUBLE BALANCED MIXER 14 14 + OSCILLATOR TDA 1574 HF INPUT 1 56 p ~ ~ R g1 3 6.8 p 50 V e1HF 2 1 4 6 1n 3.9 p 50 30 p 7 8 6.8 p 4 (98MHz) 56 p n1 R g2 3 1/4 1 1/4 n1 n2 ~ ~ (98 MHz) n2 V e2HF for AGC Functional Description The TDA1574 is an integrated monolithic FM tuner for use in the RF / IF part of car radios and home receivers. lt contains all function units for a complete VHF tuner with exception of a RF stage. The following sections are integrated: • mixer • oscillator inclusive buffer stages and a measuring output • linear IF amplifier • standby switch • reference voltage source • control voltage generation 2 09/00 TDA1574 The RF input signal reaches a symmetrically built up mixer, its input stages in common base enable very well large - signal characteristics. With exception of the RF input signal the mixer receives via buffer stages an ultra pure oscillator signal with sufficient amplitude, generated by the oscillator itself. Moreover, the oscillator signal is available at pin 9 via buffer stages for instance in order to drive frequency - synthesizers. The IF signal, supplied from the mixer, can be amplified by a linear IF preamplifier which is proofed against overdriving in order to balance signal attenuation by selection means. Wideband or narrow band or also combined gain control of the pre stage can be selected by means of an internal generated control voltage. Further on the TDA1574 contains an electronic standby switch. The oscillator can be blocked by this switch and the gain of the RF pre stage can be reduced, so that the IC is ready at once after activating of the FM operation, without thermal transients. An integrated voltage supply delivers a temperature independent voltage of about 4.15 V to provide the oscillator and to generate an internal comparison voltage. This voltage is available at pin 5. Absolute Maximum Ratings min max unit 0.3 18 V 35 35 V V Supply voltage VCC Mixer output DC voltage V16-4 V17-4 Narrow band information input voltage V12-4 0.3 7 V Reference voltage V5-4 0.3 7 V Standby switch input voltage V11-4 0.3 23 V Total power dissipation Ptot 800 mW Ambient operating temperature Ta -40 85 °C Storage temperature Ts -55 150 °C Thermal resistance Rth 80 K/W min max unit note: All pins are short-circuit protected to ground Recommended Operational Conditions Supply voltage V9 7.0 16 V Ambient operating temperature Ta -40 85 °C 09/00 TDA1574 3 Characteristics VCC = 8.5 V, Ta = 25 °C unless specified otherwise valid for a test circuit according to the shown first figure. min typ max unit Power supply Supply voltage VCC 7.0 8.5 16.0 V Supply current (except mixer) ICC 16.0 24.4 30.0 mA Reference voltage V5-4 3.9 4.1 4.4 V Current consumption I16 + I17 3.5 3.9 4.5 mA DC input voltage V1,2,4 4.0 35.0 V DC output voltage V16,17-4 4.0 35.0 V Noise figure NF 10 dB Noise figure including input network NF 12 dB 3rd order intercept point EMF1lP3 Conversion power gain Gcp Input resistance Mixer 117 10 dBµV 14 dB R1-4 22 Ω Input capacitance C1-4 14 pF Output resistance R17-4 1.9 kΩ Output capacitance C17-4 5.7 pF DC input voltage V7,8-4 1.3 V DC output voltage V6-4 2.0 V Residual FM ∆f 2.2 Hz 6.0 V 110 62 mV mV Oscillator Oscillator output buffer (measuring output) 4 DC output voltage V9-4 Oscillator output voltage RL = infinite, CL = 2 pF RL = 75 Ω V9-4(rms) V9-4(rms) 30 30 09/00 TDA1574 min typ max unit R9-15 950 Ω DC input voltage V13-4 1.2 V DC output voltage V10-4 4.5 V Input impedance R14-13 C14-13 240 300 13 360 Ω pF Output impedance R10-4 C10-4 240 300 3 360 Ω pF Voltage gain f = 10.7 MHz GV 28 30.6 dB Output resistance Linear IF amplifier 1 dB compression point VCC = 8.5 V VCC = 7.5 V V10-4(rms) V10-4(rms) 750 550 mV mV Signal to noise ratio S/N 6.6 dB Keyed AGC Output voltage range V18-4 0.5 AGC output current I3 = 0 or V12-4 = 450 mV V18-4 = VCC / 2 V3-4 = 2 V, V12-4 =1 V, V18-4 = V15-4 -I18 25 50 100 µA I18 2 35 5 mA 0.036 1 V V Narrowband threshold V3-4 = 2 V, V12-4 = 550 V V18-4 = 450 V V18-4 V18-4 Input impedance R3-4 C3-4 Wideband threshold V12-4 = 0.7 V, V18-4 = VCC / 2, I18 = 0 EMF2(rms) VCC-0.3 VCC-0.3 V 4 3 kΩ pF 20 mV Electronic standby switch Input switching voltage for threshold ON at V18-4 ≥ VCC - 3 V for threshold OFF at V18-4 ≤ 0.5 V 09/00 TDA1574 V11-4 0 2.3 V V11-4 3.3 20 V 5 Switching range min typ max unit 2.3 2.8 3.3 V -I11 60 150 µA I11 10 20 µA V11-4 3.0 4.4 V V11-4 Input current at ON condition with V11-4 = 0 at OFF condition with V11-4 = 20 V Input voltage at I11 = 0 Dependences 5 TDA 1574 V18 ( V ) V18 = f ( Vi ) with VCC = 8.5 V ViBB = 2.0 V TDA 1574 I18 = f ( Vi ) with VCC = 8.5 V ViBB = 2.0 V I18 ( mA ) 10.0 4 3 5.0 2 1 0 6 0 470 500 Vi ( mV ) 540 470 500 Vi ( mV ) 540 09/00 TDA1574 V18 ( V ) 10 I18 ( mA ) 5 TDA 1574 I18 = f ( ViBB ) with VCC = 8.5 V 4 TDA 1574 V18 = f ( ViBB ) with VCC = 8.5 V 8 f = 100 MHz f = 100 MHz Vi = 0.7 V Vi = 0.7 V 3 6 2 4 1 2 0 0 14 20 28 ViBB ( V ) 35 20 14 28 ViBB ( V ) 19 MIXER - GAIN GM = f ( Ta ) GM ( dB ) GIF ( dB ) IF - GAIN with VCC = 8.5 V ViIF = 10 mVeff GIF = f ( Ta ) VCC = 8.5 V ViRF = 20 mVeff f = 10.7 MHz f = 100 MHz 30 14 25 9 -40 -25 09/00 TDA1574 0 25 Ta ( °C ) 70 85 -40 -25 0 25 Ta ( °C ) 70 85 7 19 4.4 GM ( dB ) MIXER - GAIN REFERENCE VOLTAGE Vref = f ( Ta ) Vref ( V ) GM = f ( VCC ) with ViRF = 10 mVeff f = 100 MHz with VCC = 8.5 V 4.2 14 4.1 4.0 3.9 9 5.0 10.0 VCC ( V ) -40 -25 15.0 0 25 Ta ( °C ) 70 85 5.0 I16+17 ( mA ) 38 TDA 1574 ICC ( mA ) CURRENT CONSUMPTION ICC = f ( Ta ) with VCC = 8.5 V and mixer current TDA 1574 MIXER CURRENT (I16 + I17) = f ( Ta ) with VCC = 8.5 V 4.5 30 4.0 26 3.5 22 18 3.0 -40 -25 8 0 25 Ta ( °C ) 70 85 -40 -25 0 25 Ta ( °C ) 70 85 09/00 TDA1574 4.0 TDA 1574 TDA 1574 SWITCH-OVER VOLTAGE SWITCH-OVER VOLTAGE I11 ( µA ) V11 ( V ) 70 V11 = f ( Ta ) with VCC = 8.5 V 3.5 I11 = f ( Ta ) with VCC = 8.5 V 50 3.0 40 2.5 30 20 2.0 -40 -25 0 25 Ta ( °C ) 7 0 85 -40 -25 0 25 Ta ( °C ) 7 0 85 5 Vosc ( mVrms ) I18 ( mA ) 80 3 40 2 TDA 1574 TDA 1574 I18 = f ( Ta ) Vosc = f ( Ta ) with VCC = 8.5 V 1 with VCC = 8.5 V ViBB = 400 mVeff RL = 75 Ω ( 100 MHz ) Vi = 1.0 V fosc = 110 MHz 0 0 -40 09/00 TDA1574 0 Ta ( °C ) 90 -40 0 Ta ( °C ) 90 9 100 TDA 1574 -I18 = f ( Ta ) -I18 ( µA ) with VCC = 8.5 V Vi = 0.45 V V18 = VCC/2 50 0 -40 0 90 Ta ( °C ) Application Examples supply voltage + 8.5 V 27 33 k 18 BB 204 220 k 180 k L3 BB 204 L4 560 p 47 k 47 k 3.9p 4 68 k 1.2 k 270 6.8 p 560 p 68 BB 204 560 p L6 5.6 k L1 L2 16 TDA 1574 180 k BB 204 47 k L5 antenna 75 Ω L7 L8 5 14 10n 6 13 3.9p 7 12 8 11 9 10 L7/L8 Toko 119 AN (C) L7 - 2 x 5.5 wdgs. L8 - 4 wdgs. 120 15 SFJ 10.7 A 10 n 10 n narrow band AGC information SFJ 10.7 A stand-by switching voltage IF-output 470p 330 100 n tuning voltage 10 150 p L5/L6 Toko E 516 HNS-200057 L5 - 3.25 wdgs. L6 - 4.25 wdgs. 4.7p 3 ferrite pearl 560 p 17 150 p 18 1 4.7p 2 68 k 2.2 µ 220 k 560 p 22 L1/L2 L3/L4 antenna transformer Toko E 250 HN-4000023 L1 - 1 wdg. L2 - 4.5 wdgs. L3 - 4.5 wdgs. L4 - 4.5 wdgs. 10 n 330p 10 n oscillator output voltage 09/00 TDA1574 stand by search tuning stop 0 mode select 1 +V CC AGC HFPRE-AMP. 1 18 10 9 2 17 11 8 3 16 12 7 15 13 4 TDA 1574 6 TDA 1596 5 14 14 5 6 13 15 4 7 12 16 3 8 11 17 2 9 10 18 1 tuning narrow band AGC to counter level indicator LF-MPX signal FM - front - end based on TDA1574 and TDA 1596 Application Hints Plns 11 and 12 should be blocked to ground by in each case 10 nF in order to avoid unwanted signal injection. The IF gain can be adjusted within the range between 10 dB and 82 dB by means of a dc voltage between 0.6 and 1.6 V at pin 3. Start of the prestage AGC depends on the RF input voltage at pin 3 and on the dc voltage at pin 12. By appropriate selection of the effective share of the indication voltage at pin 12 the ratio of noise and large signal charasteristic can be optimized. Copying is generally permitted, indicating the source. However, our consent must be obtained in all cases. MEGAXESS reserves the right to make changes in specifications at any time and without notice. The information and suggestions are given without obligation and cannot give rise to any liability, they do not indicate the availability of the components mentioned. The information included herein is believed to be accurate and reliable. However, MEGAXESS assumes no responsibility for its use; nor for any infringements of patents or of other rights of third parties which may result from its use. Megaxess GmbH Deutschland • POB 1370 • 15236 Frankfurt(Oder) • Germany Phone +49 335 2005 • FAX +49 335 3251 • Internet http://www. megaxess.de 09/00 TDA1574 11