AN6182K, AN6182S Unit : mm ■ Overview The AN6182K and AN6182S are recording and playing amplifier ICs for answering telephones. They incorporate an ALC circuit, recording and playing amplifiers, a loudspeaker amplifier, and a VOX circuit. 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 1.778 21.7±0.3 Recording and playing amplifier IC for answering telephones 0.5±0.1 0.9±0.25 AN6182K 1.1±0.25 6.2±0.3 3.05±0.25 4.7±0.25 ■ Features • Incorporates recording and playing amplifiers. • Incorporates a loudspeaker amplifier. • Incorporates a VOX circuit. • Incorporates a magnetic-head circuit to provide for one-tape + 0.1 0.30 – 0.05 7.62±0.25 3—15˚ SDIP package with 24 pins (SDIP024-P-0300) cassette recording. • Incorporates 4 control circuits. Unit : mm 0.15 0.925 2.0±0.2 15.3±0.3 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 9 10 11 12 0.1±0.1 1.27 0.6±0.3 0.45 AN6182S 0.3 7.2±0.3 9.4±0.3 SOP package with 24 pins (SOP024-P-0375) ■ Block Diagram PRE GND 24 PRE VCC 23 22 21 ALC ALC PRE 20 19 18 17 16 15 14 – ALC REC + Vcc EQ DET MIC 13 LIN Pre Amp. – VOX + + DET + Vref SP 1 Power VCC 2 LOGIC – 3 Power GND REG Com SPMUTE 4 5 6 PREMUTE MIC LIN PLAY REC 7 8 9 10 11 12 ■ Absolute Maximum Ratings (Ta=25˚C) Symbol Rating Supply voltage Note 1) Parameter VCC 9.0 V Supply current Note 1) ICC 600 mA 700 mW 338 mW Power dissipation Note 2) AN6182K PD AN6182S Operating ambient temperature Storage temperature Topr AN6182K Tstg AN6182S Unit –20 to + 75 ˚C –55 to + 150 ˚C –55 to + 125 ˚C Note 1) The IC must be used under the condition VCC × ICC < PD. Note 2) Ta=60˚C ■ Operating Supply Voltage Range Parameter Symbol Range VCC 4.5 to 9.6V Operating supply voltage range ■ Electrical Characteristics min typ max MIC preamp. gain Parameter Symbol GV Vi=–64dBm Condition 48.5 50.5 52.5 dB MIC preamp. ALC output VO Vi=–30dBm –11 –9 –7 dBm MIC preamp. output noise voltage Vno DIN/AUDIO, Rg=10kΩ 1.2 2.5 mVrms LIN preamp. gain GV Vi=–64dBm 48.5 50.5 52.5 dB LIN preamp. ALC output VO Vi=–30dBm –11 –9 –7 dBm LIN preamp. output noise voltage Vno DIN/AUDIO, Rg=10kΩ 1.2 2.5 mVrms VOX sensitivity (1) VS1 Vi=–35dBm VOX sensitivity (2) VS2 Vi=–29dBm REC head drive GV Rg=1kΩ, Vi=–10dBm PRAY/EQ amp. gain GV Vi=–60dBm PRAY/EQ amp. output noise voltage Vno DIN/AUDIO, Rg=10kΩ POWER amp. gain GV Vi=–20dBm 14.5 17 POWER amp. max output voltage VO RL=8Ω, THD=5% 100 200 mW POWER amp. output noise voltage Vno DIN/AUDIO, Rg=10kΩ 0.2 1.0 mVrms Pre. VCC voltage VCC No signal, VCC=5V 3.6 4.0 4.4 V ∆PRE VCC voltage VCC – 0.25 – 0.07 0.1 V Total circuit current (1) Itotal-1 12 20 30 mA Total circuit current (2) Itotal-2 No signal, VCC=5V ICC (Pre) =0 to 6mA No signal recording mode (SP ON) No signal recording mode (SP OFF) 2 3.3 5 mA 3.5 4.8 Unit V 0.025 0.5 V –18.7 –16.2 –13.7 dBm 39.5 41.5 43.5 dB 0.3 1.2 mVrms 19.5 dB ■ Pin Descriptions Pin No. Symbol 1 Power VCC 2 Power out 3 Power GND 4 Power NF 5 Power in 6 SP mute control 7 Preamp. mute control 8 MIC/LIN control 9 REC/PLAY control 10 VOX out 11 VOX DET 12 VREF 13 EQ–amp. out 14 EQ–amp. NF 15 Head in/out 16 REC ADJ 17 VOX in 18 Pre out 19 Pre NF 20 ALC DET Description Loudspeaker amplifier power supply input An external power supply connects to this pin. The input supply voltage range is 4.5 to 9V. Loudspeaker amplifier output This pin connects through an electrolytic capacitor to a loudspeaker with a load impedance of 8Ω or more. This pin is effective only when Pin6 is high. Loudspeaker amplifier ground This pin connects to an external ground. This ground should be separated from that of the preamplifier circuits. Loudspeaker amplifier inverse input A combination of resistors and a capacitor connected between this pin and Pin2 and the ground determines the gain and frequency characteristics of the loudspeaker amplifier. Loudspeaker amplifier non-inverse input Signals should be input to this pin through a capacitor. The expected input impedance is typically 27kΩ. Loudspeaker amplifier mute control If the voltage level at this pin is high, the loudspeaker amplifier turns ON, and if low, turns OFF. Preamplifier mute control If the voltage level at this pin is high, the preamplifier turns OFF, thereby blocking the MIC and line preamplifier outputs. If the voltage is low, the preamplifier turns ON. Even if the preamplifier is turned OFF (mute ON), signals input to Pin9 are output from Pin18. MIC/line preamplifier switching If the input to Pin7 is low and the input to this pin is high, then the line preamplifier turns ON and the MIC preamplifier turns OFF. If the input to Pin7 is low and the input to this pin is low, then the line preamplifier turns OFF and the MIC preamplifier turns ON. REC/PLAY switching If the input to this pin is high, the recording amplifier turns OFF, and the play equalizer amplifier turns ON. If low, the recording amplifier turns ON, and the play equalizer amplifier turns OFF. VOX output The VOX detection signal is output from this pin. This pin should be connected through a resistor (100-200kΩ) to the power supply. VOX detection control This pin should be connected through a resistor (10 to 470kΩ) and a capacitor in parallel to the ground. The resistance determines the sensitivity of VOX detection. Internal reference supply voltage output This pin should be grounded through a 100µF capacitor. Equalizer amplifier output Amplified play signals from the head are output from this pin. A resistor and capacitors connected between this pin and Pin14 determine the equalizer characteristics. Equalizer amplifier inverse input This pin connects through a resistor to Pin13 to determine the equalizer characteristics. The expected input impedance is typically 10kΩ. To the REC/PLAY head A REC/PLAY head must be connected between this pin and the ground. Switching of REC and PLAY modes is done by Pin9. A load resistor should be connected between this pin and the ground because the input impedance becomes high (several hundred kilohms) in the PLAY mode. REC gain control A resistance connected between this pin and the ground determines the head bias current in the REC mode. The lower the resistance, the higher the current. A serial combination of a resistance and a capacitance, connected in parallel with the resistance, determines the REC gain. VOX amplifier input The preamplifier output at Pin18 must be connected through a resistor and a capacitor to this pin. The impedance between Pin18 and this pin determines the gain, and a resistance betweeen Pin11 and the ground determines the frequency characteristics of the VOX amplifier. Preamplifier output Amplified MIC/line preamplifier outputs are output from this pin depending on the the statuses of Pin7 (preamplifier mute) and Pin8 (MIC/line switching). Preamplifier inverse input Resistors and a capacitor connected between this pin and Pin18 and 12 determine the preamplifier gain. The input impedance at this pin is several hundred kilohms. ALC detection control A 240kΩ resistor and a 4.7µF capacitor connected in parallel between this pin and the ground control ALC detection sensitivity. ■ Pin Descriptions (cont.) Pin No. Symbol 21 LIN in 22 MIC in 23 PRE VCC 24 PRE GND Description Line preamplifier input Line receiver signals are input through a capacitor and a resistor to this pin, and then amplified to be output from Pin18. The statuses of Pins7 and 8 enable or disable the signals. The input impedance with ALC OFF is 10kΩ. MIC preamplifier input MIC signals are input through a capacitor and a resistor to this pin, and then amplified to be output from Pin18. The statuses of Pins7 and 8 enable or disable the signals. The input impedance with ALC OFF is 10kΩ. Preamplifier internal regulated supply voltage output This pin should be grounded through a 220µF capacitor. The output voltage is typically 4.2V. The output can be used as an ECM bias current source. Preamplifier ground This is the ground pin for the preamplifier circuits. ■ Pin Descriptions Pin No. Description Pin No. Description 1 Loudspeaker amplifier power supply input 13 Equalizer amplifier output 2 Loudspeaker amplifier output 14 Equalizer amplifier inverting input 3 Loudspeaker amplifier ground 15 To the REC/PLAY head 4 Loudspeaker amplifier inverse input 16 REC gain control 5 Loudspeaker amplifier non-inverting input 17 VOX amplifier input 6 Loudspeaker amplifier mute control 18 Preamplifier output 7 Preamplifier mute control 19 Preamplifier inverting input 8 MIC/line preamplifier switching 20 ALC detection control 9 REC/PLAY switching 21 Line preamplifier input 10 VOX output 22 MIC preamplifier input 11 VOX detection control 23 Preamplifier internal regulated supply voltage output 12 Internal reference supply voltage output 24 Preamplifier ground ■ Block Diagram Showing the Logic of Amplifies 19 22 18 16 15 REC 13 EQ MICREC Pre 21 LINPRE 5 SP 4 2 6 7 8 1. Loudspeaker amplifier mute 6 SP MUTE SP POWER H ON L OFF 2. REC/PLAY switching 9 PLAY/REC REC EQ H OFF ON L ON OFF iMIC/LIN MIC PRE AMP LIN PRE AMP OFF OFF 3. Preamplifiers switching 9 PRE AMP H L H OFF ON L L ON OFF 9 POWER VCC=4.5 to 9.0V + C1 220 µF + SP OUT C2 220µF – R1 51kΩ 3 + SP + 4 + R2 10kΩ C4 0.1µF 6 C5 0.1µF SPMUTE SP Mute Pre 19 R13 100kΩ + SP IN VR 10kΩ C3 0.1µF + 5 ALC DET ALC LIN 20 R16 240 C17 kΩ 4.7µF 21 R17 47kΩ C15 0.015 µF 7 PRE MUTE Pre Mute 8 C14 0.01 µF R12 9.1kΩ LIN MIC MIC LIN 17 C13 0.033 µF 4.7 kΩ LOGIC PRE OUT 18 R15 R14 1kΩ 30kΩ – 2 ALC PRE VCC MIC 22 23 R18 47kΩ C18 0.68 µF C16 2.2 µF 9 10 Com VOX OUT R4 200 kΩ Vcc 15 VOX DET R10 10kΩ PLAY REC PLAY REC REC 16 R11 15kΩ C12 0.47µF 11 14 R5 220 kΩ R8 200 kΩ C10 22 µF 12 C7 100 µF REG C6 + 0.1 µF EQ 13 C8 660 pF REC OUT Vref R7 18 R4 kΩ 330 C9 kΩ 0.01 µF + 1 24 + C20 100 µF C19 0.68 µF LIN IN + MAC IN + + PRE VCC C11 10µF – + R9 1kΩ PLAY IN EQ OUT ■ Application Circuit