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AME7106CPL Datasheet(PDF) 11 Page - Analog Microelectronics |
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AME7106CPL Datasheet(HTML) 11 Page - Analog Microelectronics |
11 / 20 page AME, Inc. 11 AME7106/AME7106A/AME7106R AME7107/AME7107A/AME7107R 3-1/2 Digit A/D Converter High Accuracy, Low Power Segment Drivers (AME7107) The AME7107 is designed to drive common anode LEDs. All segment drivers are N-channel transistors with a typically 8 mA current driving capability. The 1000’s segment AB4 sinks current from two LED seg- ments, and has a 16 mA driving capability. The polar- ity indication is “on” when the analog input voltage is negative. Test When the TEST is pulled to V+ all segments and the minus sign will be activated. The TEST pin is tied to the internally generated digital ground through a 500 Ω resistor in the AME7106. It is typically 5V lower than V+. TEST pin may be used as the negative power sup- ply for external CMOS logic at the maximum current of 1 mA. Data Hold When the Hold pin is connected to V+ the conversion result will not be updated. The conversion is still free running during the hold mode. It is available in 44 pin package. Integration Status (INTEN) The INTEN is an output signal of the converter, it is “high” during the signal integration phase. This signal can be used as a status indicator or a control to con- nect the analog signal to the converter for processing. It is available in 44 pin package. De-integration Status (DEEN) The DEEN is an output signal of the converter, it is “high” during the reference de-integration phase. The period of the DEEN is proportional to the conversion result. Users may calculate the conversion result by counting the number of clock pulse on the OSC3 pin when DEEN is “high”. The conversion result is equal to (N/4) - 1/2 where N is the number of the pulse at the OSC3 pin. It is available in 44 pin package. n n n n n Component Value Selection Auto-Zero Capacitor (Caz) The Caz capacitor size has some influence on system noise. A 0.47 µF capacitor is recommended for 200 mV full-scale applications. A 0.047 µF capacitor is recommended for 2.0V full-scale applications. A mylar dielectric capacitor is adequate. Reference Capacitor (Cref) A 0.1 µF capacitor is acceptable when “INLO” is tied to analog common. If a large common-mode voltage |
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