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1Publication date: December 2001 SDC00022BEB AN7333S 4-Element Graphic Equalizer IC for Radio/Radio Cassette Recorder I Overview The AN7333S is an integrated circuit for 4- element 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 adjust- ment of the boost and the cutting quantitiy is possible by variable resistors. I Features
- The resonance frequency can be freely set by op- tional 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 µV (VCC = 5V) I Block Diagram Unit: mm SOP024-P-0375A 1 23456 789 1 0 1 1 1 2 24 23 22 21 20 19 18 17 16 15 14 13 VCC GND 0.4±0.25 0.451.27 0.1±0.1 0.3 7.2±0.3 9.4±0.3 0.15 0.925 2.0±0.2 15.3±0.3 Note) The package of this product will be changed to lead-free type (SOP024-P-0375C). See the new package dimensions section later of this datasheet.
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Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for T a = 25°C. I Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage V CC 14.4 V Supply current I CC 30 mA Power dissipation P D 432 mW Operating ambient temperature *1 Topr −20 to +75 °C Storage temperature *1 Tstg −55 to +125 °C I Recommended Operating Range Parameter Symbol Range Unit Supply voltage V CC1, VCC2 4 to 14 V I Electrical Characteristics at VCC = 5 V, Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Total circuit current I tot VIN = 0 mV 7.5 mA Voltage gain G V f = 1 kHz, VO = −10 dBV − 1.5 dB Boost quantity Boost V O = −20 dBV is set to 0 dBV 9.5 dB Cut quantity Cut V O = −20 dBV is set to 0 dBV − 9.5 dB Total harmonic distortion THD f = 1 kHz, VO = −20 dBV 0.04 % Output noise voltage V no Rg = 0 Ω, Total Flat, DIN/AUDIO 1 0 µ V Crosstalk CT f = 1 kHz, Rg = 0 Ω,Total Flat, VO = −20 dBV 12 µ V I Pin Descriptions Pin No. Description
1 Power supply
2 Non inverting input
3 Inverting input
4 Output
5 Negative feedback
6 Input pin
7 Negative feedback
8 Input pin
9 Negative feedback
10 Input pin
11 Negative feedback
12 Input pin
Pin No. Description
13 Input pin
14 Negative feedback
15 Input pin
16 Negative feedback
17 Input pin
18 Negative feedback
19 Input pin
20 Negative feedback
21 Output
22 Inverting input
23 Non inverting input
24 GND
Pin No. Equivalent circuit Description Pin voltage (V) 1 Power supply: 5 Supply pin
2 Non inverting input: 1 VCC23 Output buffer circuit non-inverting input pin 2
3 Inverting input: Center electric
22 Output buffer circuit inverting input pin potential
4 Output: Center electric
21 Output buffer output pin potential
5, 7, Negative feedback: Center electric 9, 11, Resonance circuit negative feedback pin potential 14, 16, 18, 20 6, 8, Input pin: Center electric 10, 12, Resonance circuit input pin potential 13, 15, 17, 19 24 GND pin: 0 I Terminal Equivalent Circuits In VCC Out VCC In VCC
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THD VCC THD VO Frequency characteristics 0.3 05 2 0 Supply voltage VCC (V) Total harmonic distortion THD (ˋ) 0.1 0.2 10 15 [+30°C] fO = 1 kHz VIN = −20 dB Boost Cut Flat 1.6 1.4 1.2 −40 −20−30 10 Output voltage VO (dBV) Total harmonic distortion THD (ˋ) 0.2 0.4 1.0 0.8 0.6 −10 0 VCC = 5 V fO = 1 kHz Boost Cut Flat Response in (dB) 100k10k1k10 100 300 3k 30k30 Frequency (Hz) −14 −10 −12 Boost Flat Cut
I Application Circuit Example 1 23456 789 1 0 1 1 1 2 24 23 22 21 20 19 18 17 16 15 14 13 VCC 0.012 µF0.022 µF 0.0018 µF0.0056 µF0.018 µF0.056 µF 0.068 µF0.22 µF0.68 µF 50 kΩ VR50 kΩ VR50 kΩ VR50 kΩ VR50 kΩ VR 10 kΩ 0.0047 µF 10 µF 10 µF 470 Ω 4.7 kΩ In 2 Out 2 470 Ω 0.012 µF 50 kΩ VR50 kΩ VR50 kΩ VR50 kΩ VR50 kΩ VR 10 µF 10 µF 0.0047 µF 4.7 kΩ 10 kΩ Out 1 0.0018 µF0.0056 µF0.018 µF0.056 µF 0.68 µF 0.22 µF 0.068 µF 0.022 µF Note) VR is B or G type. AN7333S fO = 2 π √ C1 × C2 × R1 × R2 (Internal resistance: R1 = 1 kΩ, R2 = 60 kΩ) * 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 kΩ variable resistor. OutIn 6.8 kΩ R1 = 1 kΩ 50 kΩ VR C1 C2 R2 = 60 kΩ
- Resonant frequency fo
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I New Package Dimensions (Unit: mm)
- SOP024-P-0375C (Lead-free package) 7.20±0.20 9.30±0.30 2.00±0.200.10±0.10 0.30±0.20 15.27±0.20 0.40+0.10 -0.05 0.15 +0 10 -0 05 0° to 10° 1324 1 12 (1.05) Seating plane Seating plane (0.65) 1.27
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