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ZAMC4100GA2R датащи(PDF) 80 Page - Renesas Technology Corp |
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ZAMC4100GA2R датащи(HTML) 80 Page - Renesas Technology Corp |
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80 / 156 page ![]() ZAMC4100 Datasheet © 2016 Integrated Device Technology, Inc. 80 January 26, 2016 Diode Temperature Measurement on AIN3, AIN4 If the application requires external temperature measurements using a diode-based sensor, it can be connected to input AIN3 or AIN4 (Figure 3.22). Both inputs have an internal current source that is enabled with bits AIN3TMEN and AIN4TMEN in register AINCONF (Table 3.32). The current sources are internally controlled by the ADC in order to provide two currents with a fixed ratio 1:10. This ratio is used for the calculation of the temperature based on the measured results. Figure 3.22 Using AIN3 and AIN4 for External Temperature Measurement CS ratio 1:10 Temp. Sensor AIN3/4 VSSA Int.Ref VREF ADC VREFP VREFN ZAMC4100 AINxTMEN VDD5V0 For more information about the temperature measurement including the LM135 and thermistors, refer to the ZAMC4100 Application Note – ADC. Table 3.32 AINCONF Register Bits Mapping Name AINCONF Bit No 7 6 5 4 3 2 1 0 Bit name Reset 0 0 0 0 0 0 0 0 Access R/W R/W R/W R/W R/W R/W R/W R/W Address 0x10 R/W = Read/Write bit Note: When the ADC conversion is running, the AINCONF register is accessed as read-only. |
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