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| ICs for Audio Common Use AN7333S 4-Element Graphic Equalizer IC for Radio/Radio Cassette Recorder I Overview The AN7333S is an integrated circuit for 4element graphic equalizers most suitable for radio cassette / portable component stereo equipment. 2-channel 4-element graphic equalizer can be configured by applying frequency setting capacitors and variable resistors externally. Non-step adjustment of the boost and the cutting quantitiy is possible by variable resistors. (0.65) 15.270.20 24 13 (1.05) Unit: mm 7.200.20 9.300.30 0.15-0.05 +0.10 0 to 10 0.300.20 1.27 0.40+0.10 -0.05 I Features * The resonance frequency can be freely set by optional selection of the capacitor capacitance. * Low distortion rate: THD = 0.04% (VCC = 5 V) * Wide dynamic range: VO = 800 mV[rms] (at Boost THD = 1%) * Low noise level: Vno = 10 V (VCC = 5V) Seating Plane 0.100.10 2.000.20 1 12 Seating Plane SOP024-P-0375C I Block Diagram GND 24 23 22 21 20 19 18 17 16 15 14 13 1 VCC 2 3 4 5 6 7 8 9 10 11 12 Publication date: July 2001 SDC00022AEB 1 AN7333S I Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 Description Power supply Non inverting input Inverting input Output Negative feedback Input pin Negative feedback Input pin Negative feedback Input pin Negative feedback Input pin Pin No. 13 14 15 16 17 18 19 20 21 22 23 24 Input pin Negative feedback Input pin Negative feedback Input pin Negative feedback Input pin Negative feedback Output Inverting input Non inverting input GND Description I Absolute Maximum Ratings Parameter Supply voltage Supply current Power dissipation Operating ambient temperature *1 Storage temperature *1 Symbol VCC ICC PD Topr Tstg Rating 14.4 30 432 -20 to +75 -55 to +125 Unit V mA mW C C Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25C. I Recommended Operating Range Parameter Supply voltage Symbol VCC1, VCC2 Range 4 to 14 Unit V I Electrical Characteristics at VCC = 5 V, Ta = 25C Parameter Total circuit current Voltage gain Boost quantity Cut quantity Total harmonic distortion Output noise voltage Crosstalk Symbol Itot GV Boost Cut THD Vno CT VIN = 0 mV f = 1 kHz, VO = -10 dBV VO = -20 dBV is set to 0 dBV VO = -20 dBV is set to 0 dBV f = 1 kHz, VO = -20 dBV Rg = 0 , Total Flat, DIN/AUDIO f = 1 kHz, Rg = 0 ,Total Flat, VO = -20 dBV Conditions Min Typ 7.5 -1.5 9.5 -9.5 0.04 10 12 Max Unit mA dB dB dB % V V 2 SDC00022AEB AN7333S I Terminal Equivalent Circuits Pin No. 1 Equivalent circuit Description Power supply: Supply pin Non inverting input: Output buffer circuit non-inverting input pin 2 3 VCC Pin voltage (V) 5 2 23 In 1 V 2 CC 3 22 Inverting input: Output buffer circuit inverting input pin Center electric potential 4 21 3 4 VCC Out Output: Output buffer output pin Center electric potential 5, 7, 9, 11, 14, 16, 18, 20 In 22 6 5 VCC Negative feedback: Resonance circuit negative feedback pin Center electric potential 6, 8, 10, 12, 13, 15, 17, 19 Input pin: Resonance circuit input pin Center electric potential 24 GND pin: 0 SDC00022AEB 3 AN7333S I Main Characteristics THD VCC 0.3 [+30C] fO = 1 kHz VIN = -20 dB THD VO 1.6 1.4 1.2 1.0 Cut 0.8 0.6 0.4 0.2 0 -40 Boost VCC = 5 V fO = 1 kHz ) Total harmonic distortion THD ( 0.2 Boost 0.1 Cut Flat 0 0 5 10 15 20 Total harmonic distortion THD ( ) Flat -30 -20 -10 0 10 Supply voltage VCC (V) Output voltage VO (dBV) Frequency characteristics 14 12 10 8 6 4 2 0 -2 -4 -6 -8 -10 -12 -14 10 30 100 300 1k 3k 10k Flat Boost Response in (dB) Cut 30k 100k Frequency (Hz) 4 SDC00022AEB AN7333S I Application Circuit Example In 2 4.7 k 10 F 50 k VR 10 F 0.0047 F 50 k VR Out 2 10 k 50 k VR 50 k VR 50 k VR 0.68 F 0.056 F 24 23 22 21 20 19 18 0.22 F 0.018 F 17 16 0.068 F 0.0056 F 15 14 0.022 F 0.0018 F 13 0.012 F 470 AN7333S 1 VCC 2 3 4 5 6 0.056 F 0.68 F 7 8 0.018 F 0.22 F 50 k VR 9 10 11 12 0.0018 F 0.022 F 50 k VR 0.0056 F 0.068 F 50 k VR 50 k VR 50 k VR 10 F 4.7 k 10 F 0.0047 F 10 k Out 1 0.012 F 470 Note) VR is B or G type. * Resonant frequency fo In 50 k VR 6.8 k R1 = 1 k C1 C2 R2 = 60 k fO = 1 2 C1 x C2 x R1 x R2 Out (Internal resistance: R1 = 1 k, R2 = 60 k) * Internal resistance: As R1 and R2 of internal resistors are common in each oscillation circuit, fO can be adjustable from an external capacitor. * Gain can be adjusted by the 50 k variable resistor. SDC00022AEB 5 |
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