Quad Differential Amp MM1366 MITSUMI Quad Differential Amp Monolithic IC MM1366 Outline This IC is a 0dB gain amp with 4 channels of built-in differential input and differential output. It has powerful noise removal at common mode level. Features (1) S/N can be improved for common mode noise on internal and external signal transmission due to differential input/output. (2) CMRR (common mode rejection ratio): 60 dB typ. (3) PSRR (power supply rejection ratio): 80 dB typ. (4) Consumption current 1.5mA typ. Package TSOP-20A Applications (1) Notebook PC audio Pin Description Pin No. Pin name 11 BIAS Inverting input to AMP1 12 -OUT3 Inverting output of AMP3 +IN1 Non Inverting input to AMP1 13 +OUT3 Non Inverting output of AMP3 5 VCC Supply voltage input pin 14 -IN3 Inverting input to AMP3 6 +IN2 Non Inverting input to AMP2 15 +IN3 Non Inverting output of AMP3 7 -IN2 Inverting input to AMP2 8 +OUT2 Non Inverting output of AMP2 16 GND2 9 -OUT2 Inverting output of AMP2 17 +IN4 Non Inverting output of AMP4 10 GND1 GND for AMP1, AMP2 18 -IN4 Inverting input to AMP4 connected to GND2. 19 +OUT4 Non Inverting output of AMP4 20 -OUT4 Inverting output of AMP4 Pin No. Pin name Functions 1 -OUT1 Inverting output of AMP1 2 +OUT1 Non Inverting output AMP1 3 -IN1 4 Functions BIAS voltage terminal BIAS voltage=VCC/2 GND for AMP3, AMP4 connected to GND1. Quad Differential Amp MM1366 MITSUMI Block Diagram Absolute Maximum Ratings (Ta=25°C) Item Symbol Ratings Units Storage temperature TSTG -40~+125 °C Operating temperature TOPR -20~+75 °C Supply voltage VCCmax. 10 V Allowable loss Pd 300 mW Recommended Operating Conditions Item Symbol Ratings Units Operating temperature TOPR -20~+75 °C Operating voltage 1 VOP 4.0~6.0 V Operating voltage 2 VOPBIAS VOP/2 V Quad Differential Amp MM1366 MITSUMI Electrical Characteristics (Except where otherwise indicated, Ta=25°C, VCC=5V, f=1kHz, VBIAS=2.5V) Item Full circuit current consumption Signal ICC Measurement conditions When non signal input,non load Input voltage=0, RL=∞ Min. Typ. Max. Unit 0.9 1.5 2.4 mA 47.0 57.5 kΩ VCC-1.0 V Input impedance ZIN 37.5 Input voltage (DC) Vi 1.0 Voltage gain 1 AV1 RL=10kΩ, fIN=20Hz~10kHz -1.0 0 +1.0 dB Voltage gain 2 (50kHz) AV2 RL=10kΩ, fIN=50kHz -6.0 -3.0 +1.0 dB Voltage gain 3 (200kHz) AV3 RL=10kΩ, fIN=200kHz -16.0 -12.0 -8.0 dB VB -12 12 mV Output voltage VOR 1.0 VCC-1.0 V Maximum output voltage Vmax. RL=10kΩ, When THD=10% VBIAS=2.5V Total Harmonic Distortion THD RL=10kΩ, Input 1.0VP-P Output impedance ZO Common mode ripple rejection ratio CMRR RL=10kΩ, Input 1.0VP-P 50 60 dB Power supply ripple rejection ratio 1 PSRR1 f=100Hz, RL=10kΩ, VCC=1.0VP-P 70 80 dB Power supple ripple rejection ratio 2 PSRR2 f=20kHz, RL=10kΩ, VCC=1.0VP-P 46 52 dB Output noise voltage VON Range 10Hz~110kHz BW=10Hz~110kHz Differencial BIAS voltage input / output Internal Circuit 1.00 1.25 Vrms 0.03 0.10 % 5.0 15.0 Ω 30 90 µVrms MITSUMI Output circuit Measuring Circuit Quad Differential Amp MM1366 Quad Differential Amp MM1366 MITSUMI Time Waveforns AMP1 VCC +IN1 BIAS GND VCC -IN1 BIAS GND VCC +OUT1 BIAS GND VCC -OUT1 BIAS GND AMP2, AMP3, AMP4 are same as AMP1. *12 :: BIAS voltage=V /2 * CC Quad Differential Amp MM1366 MITSUMI Application Circuit Note 1 : This is 0dB defferential amp that have plus and minus pin at input and output. (The condition of measuring gain is single input and output.) Note 2 : The gain is 6dB at typical application circuit. Note 3 : When connect A amplifier 2 and B Amplifier 3, improve for distortion rate from THD1=-70dB to THD2=-75dB. (when +OUT3 output-10dB voltage) Characteristics VOUT-THD 0 0 -2 -20 THD (dB) Gain (dB) Gain-Frequency -4 -6 -8 +OUT -OUT -40 -60 -80 -10 +IN1, -OUT -12 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 Frequency (Hz) -100 -30 -20 -10 0 VOUT (dBV) Note: The distortion rate for +IN, -OUT can be improved by -15dB as compared to +IN, -OUT. (VOUT = -10dBV) 10