ICs for Audio Common Use AN7062N High Voltage Input Amplifier Circuit for Hi-Fi Power Amplifier ■ Overview 21.7±0.3 ■ Features • High voltage • Low noise : Vni = 2.5µV (typ.) • Low distortion : THD = 0.003% (typ.) • Good channel separation • Wide operating supply voltage range 2 3 18 17 16 4 15 5 14 6 13 7 12 8 11 9 10 2.54 1 0.5±0.1 1.2±0.25 Unit : mm The AN7062N is a high voltage integrated circuit designed for pre-driver of 60W-class Hi-Fi audio amp. Stereo operation is enabled due to two amplifiers built-in. 0.51min. 6.3±0.25 (3.45) 3.8±0.25 + 0.1 5 0.3 – 0.2 3 ~ 15˚ 7.62±0.25 18-Lead DIP Package (DIP018-P-300E) ■ Block Diagram +VCC 4 5 6 7 8 9 11 (L.F.B) Current Mirror Emitter Follower Emitter Follower Cascade Bootstrap 3 12 13 14 15 (L.F.B) Current Mirror Cascade Bootstrap Current Mirror Differential Amplifier Differential Amplifier 16 Current Source 2 17 1 18 GND 10 –VCC1 –VCC2 ICs for Audio Common Use AN7062N ■ Absolute Maximum Ratings (Ta= 25˚C) Symbol Rating Supply Voltage Parameter + VCC + 74 Unit V Supply Voltage – VCC – 16 V Supply Current ICC 10 mA Power Dissipation PD 800 mW Operating Ambient Temperature Topr – 25 ~ + 75 ˚C Storage Temperature Tstg – 55 ~ + 150 ˚C ■ Electrical Characteristics (VCC = ± 70V, f = 20kHz, Ta = 25˚C) Parameter Symbol Condition min. typ. max. Unit Plus Side Supply Current Itot – 1 Vi = 0mV 2.5 5 7.5 mA Minus Side Supply Current Itot – 2 1.5 2.8 4.5 mA Output Noise Voltage Vno1 Vi = 0mV Vi = 0mV, Rg = 0Ω, DIN – A Filter, f = 20Hz ~ 20kHz, –12dB/OCT 0.14 1 mV mV Output Noise Voltage Vno2 Vi = 0mV, Rg = 0Ω 0.5 1.5 Total Harmonic Distortion THD VO = 30V 0.003 0.01 Open Circuit Voltage Gain GVO VO = 30V 95 PD – Ta 1.0 Power Dissipation PD (W) 0.8 0.6 0.4 0.2 0 0 40 80 120 Ambient Temperature Ta (˚C) 160 200 % dB ICs for Audio Common Use AN7062N THD – RS THD – f 0.020 0.020 VCC = ± 70V VO = 30V 0.018 Total Harmonic Distortion THD (%) Total Harmonic Distortion THD (%) 0.018 0.016 0.014 0.012 0.010 0.008 0.006 0.004 0.002 0 10 0.016 0.014 0.012 0.010 0.008 0.006 0.004 0.002 1k 100 10k 0 10 100k ■ Pin Descriptions Pin Name 100 1k 10k Source Resistance RS (Ω) Frequency f (Hz) Pin No. VCC = ± 70V VO = 30V f = 20kHz Pin No. Pin Name 1 GND 10 –VCC2 2 Input (Ch.1) 11 Output (Ch.2) 3 N.F.B (Ch.1) 12 Linear Feedback (Ch.2) 4 Phase Compensation (Ch.1) 13 Linear Feedback (Ch.2) 5 Phase Compensation (Ch.1) 14 Phase Compensation (Ch.2) 6 Linear Feedback (Ch.1) 15 Phase Compensation (Ch.2) 7 Linear Feedback (Ch.1) 16 N.F.B (Ch.2) 8 Output (Ch.1) 17 Input (Ch.2) 9 +VCC 18 –VCC1 100k