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| ICs for Audio Common Use AN7535NSA Headphone amplifier IC for portable equipment 7.80.3 Unit : mm 13 s Overview The AN7535NSA is an audio signal processing IC in which line amplifiers and beep circuit are built in the headphone amplifiers for use in portable equipment. Its headphone output block is using the center amplifier method which eliminates the need for coupling capacitor so that the circuit is most suitable for rationalization of audio circuit. 24 6.10.3 8.10.3 1 12 0.5250.1 1.20.2 (0.5) (0.325) 0.65 0.22-0.05 Seating plane +0.1 * Output coupling capacitor is not required (Center amplifier method) * Built-in line amplifiers * Built-in headphone amplifier gain change-over circuit (8 dB/12 dB) * Built-in mute circuit * Built-in beep circuit * Built-in circuit against a shock noise generated when power supply is momentary cut off. 0.5250.1 s Features 0.15 Seating plane SSOP024-P-0300B s Applications * Potable CD and MD players, etc. s Block Diagram 24 23 22 21 20 1 19 18 1 17 16 15 14 Mute VREF Beep 8/12 dB Ripple Filter 10 11 12 1 2 3 4 5 6 7 8 9 8/12 dB 13 0.10.1 1 AN7535NSA s Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 VCC1 Ripple filter Supply voltage Headphone amplifier ch.1 output pin N.C. Center amplifier output pin Output GND Headphone amplifier ch.2 output pin Line amplifier ch.1 output pin Line amplifier supply voltage Line amplifier ch.2 output pin N.C. Description Pin No. 13 14 15 16 17 18 19 20 21 22 23 24 ICs for Audio Common Use Description Line amplifier ch.2 NF pin Line amplifier ch.2 input pin Headphone amplifier ch.2 input pin Headphone amplifier ch.1 input pin Line amplifier ch.1 input pin Line amplifier ch.1 NF pin Input GND Headphone amplifier gain change-over pin Beep input pin Internal reference voltage Mute pin Mute time-constant s Absolute maximum ratings Parameter Supply voltage*2 voltage*2 Symbol VCC VCC-LINE ICC ICC-LINE PD Topr Tstg Rating 7 7 200.0 20.0 370 -20 to + 75 -55 to + 150 Unit V V mA mA mW C C Line amplifier supply Supply current Line amplifier supply current Power dissipation*3 temperature*1 temperature*1 : : : : Operating ambient Storage Notes) *1 *2 *3 *4 All items are at Ta = 25C, except for the operating ambient temperature and storage temperature parameters . Without signal Ta = 75C when mounted on the recommended printed circuit board (Glass epoxy board 50 mm x 50 mm x t0.8 mm) Use under the condition of VCC-LINE VCC s Recommended Operating Range Parameter Supply voltage*1 Symbol VCC VCC-LINE Range 1.8 to 3.4 1.8 to 3.4 (VCC to VCC + 0.2) Unit V V 2 ICs for Audio Common Use AN7535NSA s Electrical Characteristics Unless otherwise specially specified, VCC = 2.6 V, VCC-LINE = 2.8 V, f = 1 kHz, RL = 16 (HP out), RL = 10 k (line out), Ta = 25C Parameter Quiescent current 1 Quiescent current 2 Quiescent current 3 HP amplifier Voltage gain 1 Voltage gain 2 Channel balance Total harmonic distortion Maximum output power Output noise voltage Channel cross-talk*2 *2 *1 Symbol ICQM ICQ1 ICQ2 Mute-on Conditions Min 0.7 Typ 1.9 4.3 1.1 Max 3.0 8.8 2.0 Unit mA mA mA Without input, pin 3 current, Mute-off 2.2 Without input, pin 10 current, Mute-off VO = 0.35 V[rms], GV = 12 dB VO = 0.35 V[rms], GV = 8 dB VO = 0.35 V[rms], GV = 8 dB VO = 0.35 V[rms], GV = 8 dB THD = 10%, GV = 8 dB Rg = 10 k, GV = 8 dB VO = 0.35 V[rms], GV = 8 dB VR = 0.1 V[rms], fR = 100 Hz, GV = 8 dB VIN = -15 dBm, GV = 8 dB VIN = 2.2 dBm, GV = 8 dB VIN = -6 dBm VIN = -6 dBm VIN = -6 dBm Rg = 10 k VIN = -15 dBm Pin 23 voltage for mute operation Pin 23 voltage for mute release Pin 20 voltage for voltage gain 10.9 dB to 13.9 dB Pin 20 voltage for voltage gain 6.9 dB to 9.9 dB 0.4 GV1 GV2 CB THD PO VNO CT RR VMUTE voltage*3 VBEEP 10.0 6.0 -1 20 40 60 70 5 11.7 7.8 0 0.05 44 -102 45 77 98 10 13.0 9.0 1 0.2 -93 15 dB dB dB % mW dBm dB dB dB mV[p-p] Ripple rejection Mute attenuation Beep sound output Line amplifier Voltage gain GV L THDL CTL *1 5.0 85 70 2.2 2.2 6.0 0.003 95 -104 80 7.0 0.02 -98 0.5 0.5 dB % dB dBm dB V V V V Total harmonic distortion Channel cross-talk Output noise voltage Mute attenuation*2 VNO L VMUTE L VMON VMOFF VGCON VGCOFF Mute operating voltage Mute release voltage Gain change-over operating voltage Gain change-over Off voltage Note) *1 : Using A curve filter *2 : Using 30 kHz LPF *3 : The specifications are guaranteed under the both mute on/off conditions. 3 AN7535NSA ICs for Audio Common Use s Electrical Characteristics (continued) Unless otherwise specially specified, VCC = 2.6 V, VCC-LINE = 2.8 V, f = 1 kHz, RL = 16 (HP out), RL = 10 k (line out), Ta = 25C * Design reference data Note) The following characteristics are the reference values for design and not guaranteed values. Parameter Quiescent current 1 Quiescent current 2 Quiescent current 3 HP amplifier Voltage gain 1 Voltage gain 2 Channel balance Total harmonic distortion Maximum output power Output noise Channel voltage*1 cross-talk*2 Symbol ICQM ICQ1 I CQ2 Mute-on Conditions Min Typ 1.9 4.6 1.1 Max Unit mA mA mA Without input, pin 3 current, Mute-off Without input, pin10 current, Mute-off VO = 0.35 V[rms], GV = 12 dB VO = 0.35 V[rms], GV = 8 dB VO = 0.35 V[rms], GV = 8 dB VO = 0.35 V[rms], GV = 8 dB THD = 10%, GV = 8 dB Rg = 10 k, GV = 8 dB VO = 0.35 V[rms], GV = 8 dB VR = 0.1 V[rms], fR = 100 Hz, GV = 8 dB VIN = -15 dBm, GV = 8 dB VIN = 2.2 dBm, GV = 8 dB VIN = -6 dBm VIN = -6 dBm VIN = -6 dBm Rg = 10 k VIN = -15 dBm GV1 GV2 CB THD PO VNO CT RR VMUTE voltage*3 VBEEP 11.7 7.8 0 0.05 52 -102 45 77 98 10 dB dB dB % mW dBm dB dB dB mV[p-p] Ripple rejection Mute attenuation*2 Beep sound output Line amplifier Voltage gain GV L THDL CTL VNO L VMUTE L 6.0 0.003 95 -104 80 dB % dB dBm dB Total harmonic distortion Channel cross-talk Output noise Mute Notes) voltage*1 attenuation*2 *1 : Using A curve filter *2 : Using 30 kHz LPF *3 : Under the both mute on and off conditions 4 ICs for Audio Common Use s Terminal Equivalent Circuits Pin No. 1 3 50 k AN7535NSA Equivalent circuit Description VCC1 Internally stabilized power supply DC (V) 2.4 2 2 1 Internal circuit 10 k 100 k 250 k Ripple filter Internally stabilized power supply 2.17 3 4 3 VCC Headphone amplifier side supply voltage Headphone amplifier ch.1 output pin 2.6 1.1 16 4 21.8 k 14.4 k VREF R = 1.1 V 14.4 k 7 5 6 3 N.C. Headphone amplifier center output pin 1.1 6 3 k 2 k 1.5 k VREF C = 1.1 V 7 7 8 3 Output GND Headphone amplifier ch.2 output pin 15 0 1.1 8 21.8 k 14.4 k 14.4 k VREF L = 1.1 V 7 5 AN7535NSA s Terminal Equivalent Circuits (continued) Pin No. 9 10 Equivalent circuit ICs for Audio Common Use Description Line amplifier ch.1 output pin DC(V) 1.4 9 350 A 10 11 10 Line amplifier supply voltage Line amplifier ch.1 output pin 2.8 1.4 11 350 A 12 13 13 14 N.C. Line amplifier ch.2 NF pin RIN = 100 k 14 1.4 20 A 5 A Line amplifier ch.2 input pin RIN = 100 k 1.4 15 15 14.4 k 250 8 Headphone amplifier ch.2 input pin RIN = 14.4 k 1.1 50 A VREF L = 1.1 V 16 16 14.4 k 250 50 A 4 Headphone amplifier ch.1 input pin RIN = 14.4 k 1.1 50 A VREF R = 1.1 V 6 50 A ICs for Audio Common Use s Terminal Equivalent Circuits (continued) Pin No. 17 17 20 A 5 A AN7535NSA Equivalent circuit Description Line amplifier ch.1 input pin RIN = 100 k 18 Line amplifier ch.1 NF pin RIN = 100 k DC(V) 1.4 18 1.4 19 20 Input GND Headphone amplifier gain change-over pin GV = 8 dB mode V20 > V1 - 0.2 V GV = 12 dB mode V20 < 0.5 V RIN = 100 k Beep input pin RIN = 100 k Beep circuit operation when V21 < VCC - VBE Gain is fixed by internal circuit Internal reference voltage RIN = 100 k Beep circuit operation when V21 < VCC - VBE Gain is fixed by internal circuit 0 1 100 k 20 100 k 21 3 100 k 100 k 100 k 21 22 3 100 k VREF R VREF C VREF L 1.2 22 100 k 23 1 100 k 23 24 24 100 k Mute pin Mute-on V23 > V1 - 0.2 V Mute-off V23 < 0.5 V RIN = 100 k Mute time constant Mute-on/off threshold value Mute-on V24 < VREF C = 1.2 V Mute-off V24 > VREF C = 1.2 V 300 70 k 330 k When Mute-on 0 When Mute-off 2.0 7 AN7535NSA s Usage Notes 1. 2. Use N.C. pin in open or grounded condition. ICs for Audio Common Use The output middle point of line amplifier is determined by the following equation ; Depending on the values of VCC and VCC-LINE, the middle point of line amplifier may shift from 1/2VCC-LINE. Use it by conducting a fine adjustment of R1 and R. 25 R1 * 1.1 * VO-DC = VCC 30 R1 + R2 1 R2 Line amplifier reference voltage R1 3. It is recommended that the VCC (pin 3) should be used at the same potential of the VCC-LINE (pin 10), or 0.2 V lower than the potential of VCC-LINE (pin 10). s Technical Information * PD Ta curves of SSOP024-P-0300B PD T a 1 000 900 800 Power dissipation PD (mW) 740 700 600 500 400 390 300 200 100 0 0 25 Glass epoxy board (50 x 50 x t0.8 mm) Rth(j-a) = 135.1C/W PD = 740 mW(25C) Independent IC without heat sink Rth(j-a) = 256.4C/W PD = 390 mW(25C) 50 75 100 125 Ambient temperature Ta (C) 8 ICs for Audio Common Use s Application Circuit Example Line amp.1 in HP amp.1 HP amp.2 Line amp.2 in in in 10 k AN7535NSA Mute Beep HP amp. gain SW 4.7 k 68 k 47 k 68 k 47 k 10 k 10 F 10 F 10 k 1 F 0.1 F 1 F 10 F 1 F 10 k 4.7 k 24 23 22 21 20 1 19 18 1 17 16 15 14 13 10 11 0.47 F 0.47 F N.C. 1 1 220 F 0.1 F 2.6 V 1 0.47 F 10 F 1 F 4.7 F RL= 16 HP out1 RL= 16 HP out2 Line amp.1 output Line amp.2 output 220 F 2.8 V 4.7 F N.C. 12 1 2 3 4 5 6 7 8 9 33 F 33 F 9 |
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