LAG665

MITSUMI IC for Headphone Stereos LAG665 IC for Headphone Stereos Monolithic IC LAG 665 Outline This IC was developed for use in headphone stereos, and incorporates dual preamp, power amp, electronic VR and motor control circuits. It can be used in a simple circuit configuration which requires very few external components. Features 1. Broad operating voltage range of 2.0 to 5.0 V (amp system operates to 1.8 V) 2. Few external components required 1. Internal equalizer resistance 2. Direct coupling of preamps, electronic VR, power amp 3. No need for output coupling capacitor 3. Well-balanced electronic VR, A-curve attenuation characteristic obtained with B-curve VR 4. Internal motor control circuit, with noise from motor driving unit suppressed 5. Provided with pin to turn off preamps Package SOP-28B (LAG665F) SDIP-30A (LAG665D) Absolute Maximum Ratings Item Operating temperature Storage temperature Power supply current Power consumption Operating voltage Symbol Topr Tstg VCC Pd Vop Ratings -20~+65 -40~+125 -0.3~+7.5 450 (SOP-28B) 750 (SDIP-30A) 2.0~5.0 Units °C °C V mW V MITSUMI IC for Headphone Stereos LAG665 Electrical Characteristics (Except where noted otherwise, Ta=25°C) Item Symbol Measurement conditions Min. Typ. Max. Units Consumption current ICC VIN=0V, IM=0mA 18 25 mA Preamp unit (Ta=25°C) 72 dB Open-circuit gain Gvo Vo=-10dBm, RL=∞ Closed-circuit gain Gvc Vo=-10dBm 40 42 44 dB Maximum output voltage Vom THD=10% 0.45 0.6 Vrms Total harmonic distortion ratio THD VOUT=400mVrms 0.05 0.5 % 150 300 µVrms Output noise voltage Vno VIN=0, Rg=2.2k BPF(30~20kHz) VOUT=-10dBm 18 22 kΩ Input impedance ZIN 30 dB Crosstalk between channels C.T Rg=2.2k, VOUT=-10dBm Output voltage with preamp off Vooff VIN=100mVrms -50 dB Output resistance with preamp off Rooff 10 kΩ Input resistance on pre off Rioff 10 kΩ Measurement conditions Unless noted otherwise, VCC=3.0 V, f=1 kHz. The preamp off pin is left open Attenuator unit (Ta=25°C) Vi max. 0.2 Vrms Maximum input voltage Maximum attenuation Va max. Vcont=min. 66 dB Attenuation error Vaerr Vcont=max. 0 dB 15 20 kΩ Input impedance ZIN Control pin input resistance Zicot 100 kΩ Measurement conditions Unless noted otherwise, VCC=3.0 V, f=1 kHz, (RL=16Ω). Power amp unit (Ta=25°C) Voltage gain Gv POUT=5mW 26 28 30 dB Voltage gain difference between channels Gv Vcont=max. 0 3 dB Maximum output power I Pom1 THD=10%, RL=32Ω 20 28 mW Maximum output power II Pom2 THD=10%, RL=16Ω 30 mW Total harmonic distortion ratio THD POUT=5mW 0.2 2.0 % 20 30 dB Crosstalk between channels C.T POUT=5mW Output noise voltage Vn Rg=2.2k, Vcont=min. 0.25 1.0 mVrms 34 40 dB Ripple rejection RR VCC=3V, 100Hz, 100mVp-p 6 9 mVrms Noise of preamp + power amp Vnto VIN=0V, Rg=2.2k, Vcont=max. Measurement conditions Unless noted otherwise, VCC=3.0 V, f=1 kHz,(RL=16Ω). Motor control unit (Ta=25°C) Consumption current IMC 3.0 5.0 mA Startup current IMS 500 mA Reference voltage Vref Between RML-ADJ pins 0.72 0.80 0.87 V 0.05 %/V Reference voltage fluctuation I Vref1 VCC between 2.1 and 5.0 V Reference voltage fluctuation II Vref2 IM between 25 and 250 mA 0.01 %/mA Reference voltage fluctuation III Vref3 Ta between -10 and 50°C 0.01 %/°C Current coefficient K 32 38 43 0.5 %/V Current coefficient fluctuation I K1 VCC between 2.1 and 5.0 V Current coefficient fluctuation II K2 IM between 25 and 250 mA 0.05 %/mA Current coefficient fluctuation III K3 Ta between -10 and 50°C 0.02 %/°C Output voltage on forced on VCEsa IM=200mA, 14PIN=VCC 0.6 V Input resistance on forced on Rion 5.6 kΩ Leakage current on forced off IML 200 µA Input resistance on forced off Ricon 33 kΩ Measurement conditions Unless noted otherwise, VCC=3.0, IM=100 mA, circuit constants as specified. Motor: M25E-7 (Mitsumi model) Voltage across pins 13 and 19 (motor pins) fluctuates. * * MITSUMI IC for Headphone Stereos LAG665 Block Diagram Measuring Circuit MITSUMI IC for Headphone Stereos LAG665 Switch Matrix Switch Number Item 1 2 c b 3 a b 4 b 5 b 6 a 7 b 8 b Conditions (Except where noted otherwise, 9 10 11 RL=16Ω, VCC=3V, Fosc=1kHz) baa IM=0mA, VR=max. Vo=-10dBm THD=10% Vo=400mVrms Measured after inserting BPF (30 Hz to 20 kHz) VO=-10dBm, measured with channels swapped using SW1, SW2 a a a VIN=100mVrms VIN voltage when VR=mid, THD=10% Difference in VO output when VR=max and output voltage when VR=min POUT=5mW Channel output difference at VR=max b a c a c b a a b RL=32Ω, THD=10% RL=16Ω, THD=10% POUT=5mW POUT=5mW measured with channels swapped output voltage when VR=min VR=min. VR=max. VR=max. IM=0mA IM=100mA (15~16PIN) IM=100mA, VCC=2.1~5.0V (13~17PIN) Vcc=3.0V, IM=25~250mA IM=200mA c Closed-circuit gain b Maximum output voltage Total harmonic distortion ratio Output noise voltage c b Crosstalk between channels c Output voltage with preamp off b Maximum input voltage a Maximum attenuation Voltage gain Voltage gain difference between channels Maximum output power I Maximum output power II Total harmonic distortion ratio Crosstalk between channels Output noise voltage Ripple rejection Pre + power noise Consumption currentt Startup current Reference voltage Reference voltage fluctuation I Reference voltage fluctuation II Output voltage on forced on Leakage current on forced off c Consumption current Amp unit c Preamp unit b Attenuator unit Power amp unit b a b a b a a b a Motor uni a b a b Note: For switches with only on and off states, a = on and b = off. Characteristics Preamp THD-VOUT Attenuator Output voltage attenuation (dB) VATT-VCONT 0 -20 -40 -60 -80 0/6 (min.) 1/6 2/6 3/6 4/6 5/6 6/6 (max.) VCC=3.0V Total harmonic distortion ratio (%) VCC=1.8V VCC=2.0V VCC=3.0V 10.0 1.0 0.1 0.01 -30 Voltage controllability (B curve mechanical knob) -20 -10 0 Output voltage (dBm) MITSUMI IC for Headphone Stereos LAG665 POUT. Power supply output (THD=10%) POUT max. (mW) ICC-VCC 70 60 50 40 30 20 10 0 1.0 IOC (RL=16Ω) RL=16Ω RL=32Ω 20 15 10 5 100 Power amp THD-POUT VCC=1.8V VCC=2.0V VCC=3.0V 10 No-load consumption current (mA) Total harmonic distortion ratio (%) 1 2.0 3.0 4.0 5.0 0.1 0.1 1 10 100 Power supply voltage Power supply output (mW) Power amp Ripple rejection rate (dB) Ripple rejection rate-VCC Crosstalk (dB) -10 -20 -30 -40 -50 0 1.0 2.0 3.0 4.0 5.0 PREAMP OFF VR=max. FR=100Hz VR=100mVrms RL=16Ω -10 -20 -30 -40 -50 100 Power amp crosstalk frequency VCC=3.0V 1k 10k 100k Power supply voltage (V) Frequency (Hz) Voltage gain vs. frequency 100 80 70 60 50 40 30 20 10 10 100 VCC=3.0V When VR=max. TOTAL GAIN Gain (dB) POWER AMP GAIN 1k 10k 100k Frequency (Hz)