ICs for Audio Common Use AN7337N 7-Element Graphic Equalizer IC for Hi-Fi ■ Overview 0.1%) Wide operating supply voltage range : VCC (opr.) = ±4 ~ ±18V 0.6±0.25 6.35±0.3 3.25±0.3 • 20 19 18 17 16 15 14 13 12 11 2.54 25.0±0.3 ■ Features • Low noise : Vno = 4µVrms typ. • Low distortion : THD = 0.002% typ. (at VO = 1Vrms) • High output power : VO (max.) = 9.5Vrms typ. (at. THD = 1 2 3 4 5 6 7 8 9 10 0.5±0.25 1.22±0.25 Unit : mm The AN7337N is a graphic equalizer IC for high performance Hi-Fi developed for deck. It incorporates output buffer circuit and 7 resonance buffer circuits, can set resonance frequency by external capacitor. 3.85±0.25 3.0±0.25 + 0.1 5 – 0.0 0.25 3 ~15˚ 7.62±0.25 20-Lead DIP Package (DIP020-P-0300A) ■ Block Diagram –VCC GND +VCC 20 19 18 17 16 15 14 – + Output Buffer 13 12 – + – + Resonance Section7 Resonance Section1 + – 1 2 Resonance Section2 + – 3 4 Resonance Section3 + – 5 6 Resonance Section4 + – 7 8 11 Resonance Section6 Resonance Section5 + – 9 10 ICs for Audio Common Use AN7337N ■ Absolute Maximum Ratings (Ta= 25˚C) Parameter Symbol Rating Unit Supply Voltage VCC ±18 V Supply Current ICC ±50 mA mW Power Dissipation PD 1,000 Operating Ambient Temperature Topr –20 ~ + 75 ˚C Storage Temperature Tstg –55 ~ +150 ˚C ■ Recommended Operating Range (Ta = 25˚C) Parameter Symbol Range Operating Supply Voltage Range VCC ±4V ~ ±18V ■ Electrical Characteristics (VCC = ±15V, Ta = 25˚C) Parameter Symbol Total Circuit Current ICC Voltage Gain FLAT GV (FLAT) Voltage Gain BOOST GV (Boost) Voltage Gain CUT GV (CUT) Condition min. Total Harmonic Distortion THD f= 1kHz, Vin= –10dBm FLAT VO = 0dB, Vin= –10dBm FLAT VO = 0dB, Vin= –10dBm f= 1kHz, VO = 1Vrms Max. Output Voltage VO (max.) f= 1kHz, THD= 0.1% Output Noise Voltage Vno Output Noise Voltage Vno (max.) typ. max. Unit 8 12 16 mA – 0.6 – 0.3 0 dB 10.4 12 14 dB –14 –12 –10.4 dB 0.002 0.03 Vin= 0mV % 9.5 8 Input Short, DIN/AUDIO Input Short, ALL Boost Vrms 4 35 µVrms 31 100 µVrms ■ Characteristics Curve THD – VCC Vno – VCC 10 0.05 0.03 0.02 0.01 0.005 0.003 THD – VO VCC –Vno Input Short DIN/AUDIO Total Flat 8 1 Total Harmonic Distortion THD (%) VO = 1Vrms Ta = 25˚C Output Noise Voltage Vno (µV) Total Harmonic Distortion THD (%) 0.1 6 4 2 0.002 VCC = ±15V f = 1kHz Ta = 25˚C 0.3 CUT 0.1 0.03 Boost 0.01 0.003 0.001 0 5 10 15 20 25 Supply Voltage VCC (V) 30 0 0 4 8 12 16 20 Supply Voltage VCC (V) 24 FLAT –20 0 20 Output Voltage VO (dBV) 40 ICs for Audio Common Use AN7337N THD – f VO – f 40 VCC =15V Vin =1Vrms Ta =25˚C 10 –2 10 –3 FLAT 0 CUT – 20 10 –4 10 –5 20 Output Voltage VO (dBV) Total Harmonic Distortion THD (%) 10 –1 100 1k – 40 10 10k 100 Frequency f (Hz) 1k 10k 100k Frequency f (Hz) ■ Application Circuit 560Ω VO 10kΩ 3.3µF – + 22µF 1500pF + +VCC – –VCC – 22µF 3.3kΩ + 20 19 18 17 16 15 14 13 12 11 7 8 9 10 22µF 1µF 0.33µF 0.12µF 0.056µF 0.018µF 470pF 6 0.0068µF 5 0.022µF 4 0.068µF 3 0.12µF 2 0.0012µF 1 47kΩ 0.0027µF AN7337N 0.0082µF Boost Flat Cut – + 33µF SG + 3.3kΩ – + – 3.3µF VR : 50kΩ ICs for Audio Common Use AN7337N ■ Pin Descriptions Pin No. Pin Name Description Pin Voltage (V) Equivalent Circuit 1 + VCC 1, 3, 5, 7, 9, 11, 13 Input Center electric potential (GND) Resonance circuit input pin – VCC IN 16 2 2, 4, 6, 8, 10, 12, 14 Negative Feedback Center electric potential (GND) Resonance circuit negative feedback pin 1 + VCC – VCC IN 15 Non Inverting Input Center electric potential (GND) Output buffer circuit non-inverting input pin 33kΩ 33µF 16 15 +VCC Center electric potential 16 Inverting Input Center electric potential (GND) Output buffer circuit inverting input pin –VCC OUT – + 17 +VCC 17 Output Center electric potential (GND) Output buffer circuit putput pin –VCC 18 Positive Power Supply 19 GND 20 Negative Feedback +15 0 –15 Positive supply pin GND pin Negative supply pin