Compander IC MM1100 MITSUMI 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 14 13 12 11 10 9 1 2 3 4 5 SOP-14B 6 8 7 1 E.GIN 8 C.OUT 2 E.RIN 9 C.GIN 3 E.RECT 10 C.RIN 4 E.OUT 11 C.RECT 5 E.REF 12 C.IN 6 C.REF 13 C.NF 7 GND 14 VCC Compander IC MM1100 MITSUMI Block Diagram Absolute Maximum Ratings (Ta=25°C) Item Symbol Ratings Units Storage temperature TSTG -40~+125 °C Operating temperature TOPR -10~+70 °C Power supply voltage VCC max. -0.3~+8 V Allowable loss Pd 350 mW Operating voltage VOP +2.4~+7 V Compander IC MM1100 MITSUMI Electrical Characteristics (Except where noted otherwise, Ta=25°C, Vcc=3V, fIN=1kHz, VR=0mVrms) Item Symbol Measurement conditions Consumption current ICC No signal 1.8 2.8 3.8 mA Compressor reference voltage Vrefc 6PIN DC voltage 1.3 1.4 1.5 V Expander reference voltage Vrefc 5PIN DC voltage 1.3 1.4 1.5 V Input reference level Vinc VOC=300mVrms, VIN=0dB 100 120 145 mVrms Gec1 VIN=-20dB -0.5 0 0.5 dB Gec2 VIN=-40dB -1.0 0 1.0 dB Distortion THDC VIN=0dB 0.3 1.0 % Output noise voltage Vnc No signal (CCITT) 2.5 5.0 mVrms Limit voltage Vlimc THD=10% 1.40 1.60 VP-P Crosstalk CTC EXPVIN=0dB -45 -35 dB Ripple rejection ratio RRC VR=100mVrms, fR=1kHz -20 -12 dB Input reference level Vine Voe=300mVrms, VIN=0dB 310 375 450 mVrms Gee1 VIN=-10dB -0.5 0 0.5 dB Gee2 VIN=-20dB -1.0 0 1.0 dB Gee3 VIN=-30dB -1.5 0 1.5 dB Distortion THDe VIN=0dB 0.15 1.0 % Maximum output voltage Ve max. THD=10% Output noise voltage Vne No signal (CCITT) 20 40 uVrms Crosstalk CTe COMPVIN=0dB -75 -60 dB Ripple rejection ratio RRe VR=100mVrms, fR=1kHz -60 -50 dB Gain error difference Compressor unit Gain error difference Expander unit Min. Typ. Max. Units * * (dBv) + 10.46dB) -V *Gain error difference = (VG : COMP=0.5, EXP=2 OUT IN (dB) G (dB) 1.20 700 mVrms 900 Compander IC MM1100 MITSUMI Pin Description Pin no. Function Pin voltage (typ.) 1 Input pin E 1.4V 9 Feedback signal input pin 1.4V 2 Rectifier input pin E 1.4V 10 Rectifier input pin C 1.4V 3 Rectifier pin E 0.7V 11 Rectifier pin C 0.7V 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 (10kΩ) 4 Output pin E 1.4V 5 Reference voltage pin E 1.4V 6 Reference voltage pin C 1.4V Internal equivalent circuit Compander IC MM1100 MITSUMI 7 GND pin 0V 8 Output pin C 1.4V 12 Input pin E 1.4V 13 AC signal cut pin 1.4V 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 (10kΩ) 14 VCC pin 3.0V