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| BUS IC DC/DC CONVERTER MOTOR DRIVER IC RIPPLE COUNTER DRIVER IC I/O IC y Analog multiplexer 8:1 Contact monitor 8 * to GND, par. out Contact monitor 8 * to VBAT, par. out Contact monitor 2 * 4, adj., par. out Contact monitor 2 * 4, par. out Non volatile contact monitor Contact monitor 16 *, ser. out SENSOR IC SENSOR INTERFACE IC y Analog multiplexer 8:1 FEATURES y y y y y y y y y y Supply voltage range VDD 4.5V to 5.5V Supply voltage range VS 8V to 40V Fast buffer amplifier with 1.5V/s driving 1nF load capacitance Low crosstalk in case of current-injection into input-protection diodes Low offset voltage < 4mV Output voltage limitation to VDD Buffer output with high impedance tri-state-mode I/O compatible to standard multiplexer 4051 - 40C to + 85C operating temperature SO16n package The buffer drives a 1nF load capacitance to avoid EMI disturbance of the output signal. To achieve high output slewrates, this capacitance is used for compensation also and thus has to be applied. APPLICATION y Buffered analog multiplexing A high level on pin ENB disables the output buffer and switches it into high impedance mode. This allows multiple IC outputs to be connected in parallel. Additionally the VDD current consumption is reduced in tristate mode. VS is used as the positive supply voltage for the buffer and has to be at least 2.5V higher than the maximum analog voltage to avoid clipping or slew rate reduction of the output signal. DESCRIPTION The IC is an 8 channel analog multiplexer with a buffer amplifier. The input signals IN0 to IN7 are fed to the multiplexer consisting of analog transmission gates which are controlled by the digital inputs SEL0-2. The multiplexer is designed for low crosstalk in case of current injection into the input protection diodes. PINNING Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Name IN4 IN6 OUT IN7 IN5 ENB VS GND SEL2 SEL1 SEL0 IN3 IN0 IN1 IN2 VDD Description Analog input 4 Analog input 6 Buffer output Analog input 7 Analog input 5 Enable for buffer output, active low Supply voltage for buffer amplifier Ground Control - input for multiplexer Control - input for multiplexer Control - input for multiplexer Analog input 3 Analog input 0 Analog input 1 Analog input 2 Voltage for output voltage limitation IN4 IN6 OUT IN7 IN5 ENB VS GND 1 2 3 4 5 6 7 8 E910.02 PACKAGE 16 15 14 13 12 11 10 9 VDD IN2 IN1 IN0 IN3 SEL0 SEL1 SEL2 BLOCK DIAGRAM VBAT VS VDD CH7 CH0 IN0 IN1 IN2 IN3 IN4 IN5 IN6 IN7 SEL0 SEL1 SEL2 EN 8:1 Analog MUX OUT 1nF Note ELMOS Semiconductor AG (below ELMOS) reserves the right to make changes to the product contained in this publication without notice. ELMOS assumes no responsibility for the use of any circuits described herein, conveys no licence under any patent or other right, and makes no representation that the circuits are free of patent infringement. While the information in this publication has been checked, no responsibility, however, is assumed for inaccuracies. ELMOS does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of a life-support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications. Copyright (c) 2005 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited. www.elmos.de | sales@elmos.de 64 elmos product catalog june 2005 65 |
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