TDA7332 RDS FILTER HIGH PERFORMANCE, STABLE 57KHz FILTER HIGH SELECTIVITY FLAT GROUP DELAY HIGH PERFORMANCE LIMITER VERY FEW EXTERNAL COMPONENTS 4.332MHz CLOCK OSCILLATOR (8.664MHz OPTIONAL) DESCRIPTION The TDA7332 is an RDS filter, realized in switched capacitor technique. The 4 biquad stage architecture is working with 4.332MHz clock. Optionally a 8.664MHz xtal can be used. The filter has a center frequency of 57KHz and a bandwidth of 3KHz. Input 2nd order antialiasing filter and output smoothing filter are provided. DIP14 SO14 ORDERING NUMBERS: TDA7332 TDA7332D TDA7332DIE1 (Chip on wafer) TEST CIRCUIT November 1999 1/6 TDA7332 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit 7 V Operating Temperature Range -40 to 85 °C Storage Temperature -40 to 150 °C VS Supply Voltage Top Tstg THERMAL DATA Symbol Rth j-case Description Thermal Resistance Junction-case PIN CONNECTION (Top view) BONDING PAD LOCATIONS (Top view) 2/6 Typ. DIP14 SO14 Unit 100 200 °C/W TDA7332 ELECTRICAL CHARACTERISTICS (VCC = 5V, Tamb = 25°C; fosc = 4.332MHz; VIN = 20mVrms unless otherwise specified) Symbol Parameter Test Condition Min. Typ. Max. Unit SUPPLY SECTION VCC Supply Voltage 4.5 5 5.5 V IS Supply Current 6 9 14 mA FILTER FC Center Frequency 56.5 57 57.5 KHz BW 3dB Bandwidth 2.5 3 3.5 KHz 22 dB G Gain f = 57KHz 18 20 A Attenuation ∆f = +4KHz f = 38KHz; Vi = 500mVrms f = 67KHz; Vi = 250mVrms 18 50 35 22 80 50 Phase non linearity A (see note1) B (see note1) C (see note1) ∆Ph Ri Input Impedance Signal to Noise Ratio Vi = 3mVrms Vi Input Signal f = 19KHz; T3 < –40dB (see note2) f = 57KHz (RDS + ARI) RL Load Impedance Pin 12 S/N dB dB dB 0.5 1 2 5 7.5 10 DEG DEG DEG 100 160 200 KΩ 30 40 1 50 Vrms mVrms dB 100 KΩ LIMITER RA Resistance pin 8-12 VOL Comp. Output LOW IO = +0.5mA 15 VOH Comp. Output HIGH IO = –0.5mA Duty Cycle Vi = 1mVrms 21 28 KΩ 1 V 4 V 50 % 4.332 8.664 MHz MHz OSCILLATOR FOSC Oscillator Frequency FSEL = Open FSEL = Closed to Ground VCLL Clock Input Level LOW VOLH Clock Input Level HIGH Output Amplitude 5 VPP 1 4 V V CRYSTAL TYPE = EURO QUARTZ Note (1): The phase non linearity is defined as: ∆Ph = | -2 φf2 + φf1 + φf3 | where φfx is the input-output phase difference at the frequency fx (x = 1,2,3) ∆Ph max Measure f1 (KHz) f2 (KHz) f3 (KHz) A 56.5 57 57.5 <5° B 56 57 58 <7.5° C 55.5 57 58.5 <10° Note (2): The 3th harmonic (57KHz) at the output (pin12) must be less than -40dB in respect to the input signal plus gain. 3/6 TDA7332 mm DIM. MIN.. TYP. A a1 inch MAX.. MIN.. TYP.. MAX.. 1.75 0.069 0.1 0.25 b 0.35 0.46 0.014 0.018 b1 0.19 0.25 0.007 0.010 a2 0.004 0.009 1.6 C 0.063 0.5 c1 0.020 45° (typ.) D (1) 8.55 E 5.8 8.75 0.336 6.2 0.228 0.344 0.244 e 1.27 0.050 e3 7.62 0.300 F (1) 3.8 4 0.150 0.157 G 4.6 5.3 0.181 0.209 L 0.4 1.27 0.016 0.050 M S 0.68 0.027 8° (max.) (1) D and F do not include mold flash or protrusions. Mold flash or potrusions shall not exceed 0.15mm (.006inch). 4/6 OUTLINE AND MECHANICAL DATA SO14 TDA7332 mm DIM. MIN. a1 0.51 B 1.39 TYP. inch MAX. MIN. TYP. MAX. 0.020 1.65 0.055 0.065 b 0.5 0.020 b1 0.25 0.010 D 20 0.787 E 8.5 0.335 e 2.54 0.100 e3 15.24 0.600 F 7.1 0.280 I 5.1 0.201 L Z 3.3 1.27 OUTLINE AND MECHANICAL DATA 0.130 2.54 0.050 DIP14 0.100 5/6 TDA7332 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics 1999 STMicroelectronics – Printed in Italy – All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com 6/6