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| MITSUMI Compander IC MM1100 Compander IC Monolithic IC MM1100 Outline This IC was developed for use in mobile communication equipment. It is a compander IC incorporating compressor/expander circuits for a significant noise reduction effect without complicated external circuitry. On the transmission side, the dynamic range of audio signals is compressed by the compressor circuit; on the receiving side, the expander expands the signals. As a result the dynamic range over the transmission channel is reduced logarithmically by one-half. Features 1. Can be driven at low voltages (down to 2.4V) 2. Compression and expansion circuits enable suppression of unwanted radio waves 3. Consumption current 2.8mA typ. Package SOP-14B (MM1100XF) Applications 1. Cordless telephones 2. Various mobile communication devices Pin Assignment 1 2 14 13 12 11 10 9 8 3 4 1 2 3 4 5 6 7 5 6 7 E.GIN E.RIN E.RECT E.OUT E.REF C.REF GND 8 9 10 11 12 13 14 C.OUT C.GIN C.RIN C.RECT C.IN C.NF VCC SOP-14B MITSUMI Compander IC MM1100 Block Diagram Absolute Maximum Ratings Item Storage temperature Operating temperature Power supply voltage Allowable loss Operating voltage (Ta=25C) Symbol TSTG TOPR VCC max. Pd VOP Ratings -40~+125 -10~+70 -0.3~+8 350 +2.4~+7 Units C C V mW V MITSUMI Compander IC MM1100 Electrical Characteristics Item (Except where noted otherwise, Ta=25C, Vcc=3V, fIN=1kHz, VR=0mVrms) Symbol Measurement conditions ICC Vrefc Vrefc Vinc Gec1 No signal 6PIN DC voltage 5PIN DC voltage VOC=300mVrms, VIN=0dB VIN=-20dB VIN=-40dB VIN=0dB No signal (CCITT) THD=10% EXPVIN=0dB VR=100mVrms, fR=1kHz Voe=300mVrms, VIN=0dB VIN=-10dB VIN=-20dB VIN=-30dB VIN=0dB THD=10% No signal (CCITT) COMPVIN=0dB VR=100mVrms, fR=1kHz G (dB) Min. Typ. Max. Units 1.8 1.3 1.3 100 -0.5 -1.0 2.8 1.4 1.4 120 0 0 0.3 2.5 1.20 1.40 -45 -20 310 -0.5 -1.0 -1.5 375 0 0 0 0.15 700 900 20 -75 -60 40 -60 -50 3.8 1.5 1.5 mA V V Consumption current Compressor reference voltage Expander reference voltage Input reference level 145 mVrms 0.5 1.0 1.0 5.0 1.60 -35 -12 dB dB % mVrms VP-P dB dB Gain error difference * Gec2 THDC Vnc Vlimc CTC RRC Vine Gee1 Compressor unit Distortion Output noise voltage Limit voltage Crosstalk Ripple rejection ratio Input reference level 450 mVrms 0.5 1.0 1.5 1.0 dB dB dB % mVrms uVrms dB dB Gain error difference * Gee2 Gee3 Expander unit Distortion Maximum output voltage Output noise voltage Crosstalk Ripple rejection ratio THDe Ve max. Vne CTe RRe *Gain error difference = (VOUT (dBv) + 10.46dB) -VIN (dB) G : COMP=0.5, EXP=2 MITSUMI Compander IC MM1100 Pin Description Pin no. 1 9 Function Input pin E Feedback signal input pin Pin voltage (typ.) 1.4V 1.4V Internal equivalent circuit 2 10 Rectifier input pin E Rectifier input pin C 1.4V 1.4V 3 11 Rectifier pin E Rectifier pin C The rectifier is a full-wave rectifier. The response characteristics (attack time, release time) are determined by the time constant of the external capacitor C1 and the internal resistance (10k) 0.7V 0.7V 4 Output pin E 1.4V 5 6 Reference voltage pin E Reference voltage pin C 1.4V 1.4V MITSUMI Compander IC MM1100 7 GND pin 0V 8 12 13 Output pin C Input pin E AC signal cut pin The compressor amp must have a DC gain of unity and AC gain of infinity. In order to satisfy this requirement, a capacitor C2 is connected to pin 13 to remove AC components. The cutoff frequency is determined by the product with the internal resistance (10k) 1.4V 1.4V 1.4V 14 VCC pin 3.0V |
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