IC for Headphone Stereos MM1104 MITSUMI IC for Headphone Stereos Monolithic IC MM1104 Outline This IC was developed for use in 3 V headphone stereos. It incorporates all the basic functions of tape players. Mitsumi has previously offered the LAG665, LAG668, LAG673 and MM1006 as one-chip versions. However, this IC is the result of a through review and redesign extending to circuit details. Features 1. Configuration: Pre-and power amp, motor control 2. Adoption of shock noise prevention circuitry Through the use of a circuit which suppresses noise occurring when the power supply is turned on and off, noise output is reduced without muting. 3. Stable motor speed control circuit A bridge circuit employing power transistors provides motor speed control with minimal drift. 4. Preamp off pin is convenient for radio connections 5. Radiation pin: When radio wave-induced noise is a problem, this pin can be used to cut the frequency characteristic. Package SOP-28B (MM1104AF, MM1104BF, MM1104CF) Pin Assignment 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SOP-28B 1 1/2VCC 15 N.C 2 PreIN1 16 Speed 3 NFB1 17 Phase 4 PreOUT1 18 VS 5 Pre Off 19 PowerOUT2 6 PowerIN1 20 Amp VCC 7 Radiation1 21 Filter 8 PowerOUT1 22 Radiation2 9 GND 23 PowerIN2 10 Governor VCC 24 N.C 11 N.C 25 PreOUT2 12 PCOUT 26 NFB2 13 GND 27 PreIN2 14 Governor GND 28 Amp GND IC for Headphone Stereos MM1104 MITSUMI Absolute Maximum Ratings Item Operating temperature Storage temperature Power supply current Power consumption Operating voltage Electrical Characteristics Symbol TOPR TSTG VCC Pd Vop Ratings -20~+65 -40~+125 -0.3~+7.5 700 (Ta=25°C) +2.0~+5.0 Units °C °C V mW V (Except where noted otherwise, Ta=25°C) Item Symbol Measurement conditions Min. Typ. Consumption current ICC Amp. only 11 Preamp unit (Ta=25°C) Open-circuit gain GVo Vo=-10dBm f=100Hz 86 Closed-circuit gain GVc Vo=-10dBm 42 Maximum output voltage Vom THD=10% 0.5 0.74 Total harmonic distortion ratio THD Vo=-10dBm 0.06 Output noise voltage Vno Rg=2.2kΩ, CCIR waiting 240 Crosstalk between channels CHCT Vo=-10dBm 45 60 Ripple rejection RR VCC=3V, VR=-20dBm, fR=100Hz 30 42 Output voltage with preamp off VoOff Vo=-10dBm, when pre operation -100 Input resistance with preamp off RiOff 7 10 Output resistance with preamp off RoOff 7 10 Measurement conditions: Except where noted otherwise, VCC=3V, Rg=2.2kΩ, RL=30kΩ, f=1kHz Power amp unit (Ta=25°C) Input resistance Ri 14 20 Voltage gain Gv Po=5mW 32 34 Voltage gain difference between channels Gv 0 Maximum output power I Pom1 THD=10%, RL=16Ω 40 62 Maximum output power II Pom2 THD=10%, RL=32Ω 20 34 Total harmonic distortion ratio THD Po=5mW 0.4 Crosstalk between channels CHCT Po=5mW 45 62 Output noise voltage Vn Rg=1kΩ, CCIR waiting 150 Ripple rejection RR VCC=3V, VR=-20dBm, fR=100Hz 40 50 Measurement conditions: Except where noted otherwise, VCC=3V, Rg=1kΩ, RL=16Ω, f=1kHz Motor governor (Ta=25°C) Consumption current Id A2 measured 2.0 Startup current IMS IM measured when RV=1.5Ω 500 Reference voltage Vref V5 measured with SW12 off 0.09 0.10 VS fluctuation for Reference voltage fluctuation I Vref1 0.1 VCC=1.5 to 3.5V, VCC=3.0V ref. VS fluctuation for 0.005 Reference voltage fluctuation II Vref2 IM=25 to 200m A, IM=100mA ref. VS fluctuation for Reference voltage fluctuation III Vref3 0.01 Ta=-10 to 60°C, Ta=25°C ref. Reference voltage V8 measured 0.2 Output saturation voltage VoSAT IM=200mA with SW12 on Bridge ratio K V7/V6 measured 9 10 Max. Units 18 mA dB dB Vrms 0.5 % 500 µVrms dB dB -70 dBm 13 kΩ 13 kΩ 26 36 2 2 300 7.0 kΩ dB dB mW mW % dB µVrms dB 0.11 mA mA V 0.5 %/V 0.05 %/mA %/°C 0.3 11 V IC for Headphone Stereos MM1104 MITSUMI Item Measurement conditions Min. Typ. Max. K fluctuation for Bridge ratio fluctuation I K1 0.1 0.2 VCC=1.5 to 3.5V, VCC=3.0V ref. K fluctuation for 0.05 0.2 Bridge ratio fluctuation II K2 IM=25 to 200m A, IM=100mA ref. K fluctuation for Bridge ratio fluctuation III K3 0.01 Ta=-10 to 60°C, Ta=25°C ref. Measurement conditions: Except where noted otherwise, VCC=3V, IM=100mA, SW11=OFF, SW12=ON Block Diagram Symbol (Example of Application Circuits) Characteristics Power amp THD-POUT 10 VCC=1.8V VCC=2.0V VCC=3.0V 1.0 RL=30kΩ f=1kHz 0.1 0.01 10 100 1k 10k Output voltage (mVrms) Total harmonic distortion ratio (%) Total harmonic distortion ratio (%) Preamp THD-VOUT 10 1.0 VCC=1.8V VCC=2.0V VCC=3.0V RL=16Ω f=1kHz 0.1 0.01 10 100 1k 10k Output voltage (mVrms) Units %/V %/mA %/°C IC for Headphone Stereos MM1104 MITSUMI Power amp Pre+power amp Ripple rejection rate (dB) Voltage gain-frequecy 30 20 10 1k 10k 100k 1M Ripple rejection rate-volume knob attenuation 50 40 30 20 10 0 -10 0 10M -20 N-T characteristic 3000 2500 2000 VCC=2.0V VCC=1.8V 1500 VCC=3.0V 1000 500 0 2 -30 -40 Attenuation at VR (dB) Frequency (Hz) Motor frequency (rpm) Gain (dB) 40 60 4 6 8 10 12 14 16 18 Torque (g · cm)