3 CHANNEL DIFFERENTIAL AMPLIFIER-COMPARATOR ET9560 (For 2 data channels and ungated index channel) FEATURES • Supply Voltage Range 4.5V to 30V • Operation to 1MHz • Designed for photodiode inputs • Ungated Index channel • Current sink for LED drive (see application note APP-D2) • Outputs short circuit protected • 25mA peak drive current APPLICATIONS • High Speed Optical Encoders • Industrial Controls DESCRIPTION These devices are specifically designed as receiver circuits for the photodiode signals available in optical encoders. Connect the anode of the photodiodes to the input pins, with the cathode(s) connected to Vcc for reverse-bias operation. The input amplifiers have a dynamic range of nearly 1000:1, and allow contrast ratios of encoded signal to common mode signal of as low as 2:1. Differential inputs enhance noise rejection and performance over temperature. Gating of the Z channel provides synchronization of the reference pulse to the data channel phasing. ABSOLUTE MAXIMUM RATINGS Parameter Operating Temperature Range Supply Voltage Range Symbol TA VCC Min. -40 Max. 125 Units °C 4.5 30 V Ref. Note 1 ETIC RESERVES THE RIGHT TO MAKE CHANGES AT ANY TIME TO IMPROVE THE DESIGN AND TO SUPPLY THE BEST PRODUCT. ©2000, Rev B0 iC-Haus GmbH Tel +49-6135-9292-0 Integrated Circuits Fax +49-6135-9292-192 Am Kuemmerling 18, D-55294 Bodenheim http://www.ichaus.com Page 1 of 3 ELECTRICAL CHARACTERISTICS Unless otherwise specified, typical values given at VCC=12V, TA = 25°C, with LED and RSET open. Parameters Supply Current Input Common Mode Voltage Average Photocurrent Input Peak Photocurrent Input Dark Cell Level Photocurrent Contrast Ratio Comparator Threshold Symbol Icc1 Icc2 VCM IIA IIP IID IIR Min. 4.5 5.0 0.066 0.13 0.02 2:1 Typ. 7.2 8.0 1.35 0.3 0.5 0.1 5:1 1.25: 1 3.0 28.5 199 Max. 11.5 12.5 Units mA 40 60 20 V µA µA µA 400 mV Test Conditions Vcc = 4.5 V Vcc = 30.0V Output High Level Voltage VOH Output Low Level Voltage VOL Output Short-Circuit Current Driving High (All Outputs) Output Short-Circuit Current Driving Low (All Outputs) RSET Voltage IOS 15 25 50 mA Each input Each input Each input Peak:Dark Cell Ratio of Differential Inputs IOH = -4mA,VCC = 4.5V IOH = -4mA,VCC = 30V VCC = 4.5V-30V IOL = 8mA VCC = 5V, VOUT = 0V IOS 30 70 120 mA VCC = 5V, VOUT = 5V VRSET 1.3 1.7 2.1 V R = 180 ohms 2.5 28.0 V AC SWITCHING CHARACTERISTICS Values given at VCC = 5V, TA = 25°C, CL = 15pF on all outputs. Parameters Symbol Min. Typ. Max . Units Pre-Amplifier Bandwidth BW PA 900 KHz Propagation delay from Comparator Input to Output Output Rise Time Output Fall Time TPD 850 ns TR TF 100 20 ns ns Test Conditions Photocurrent = 1µA Minimum ETIC RESERVES THE RIGHT TO MAKE CHANGES AT ANY TIME TO IMPROVE THE DESIGN AND TO SUPPLY THE BEST PRODUCT. ©2000, Rev B0 iC-Haus GmbH Tel +49-6135-9292-0 Integrated Circuits Fax +49-6135-9292-192 Am Kuemmerling 18, D-55294 Bodenheim http://www.ichaus.com Page 2 of 3 NOTES: 1. This is not a test parameter, but for information only. PACKAGE SUFFIX Chip Only 16 Lead SOIC -C -SOP ETIC RESERVES THE RIGHT TO MAKE CHANGES AT ANY TIME TO IMPROVE THE DESIGN AND TO SUPPLY THE BEST PRODUCT. ©2000, Rev B0 iC-Haus GmbH Tel +49-6135-9292-0 Integrated Circuits Fax +49-6135-9292-192 Am Kuemmerling 18, D-55294 Bodenheim http://www.ichaus.com Page 3 of 3