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| university:tools:m1k:analog-inputs [18 Jul 2019 20:40] – Add new Rev F Split I/O pin info Doug Mercer | university:tools:m1k:analog-inputs [29 Jul 2019 18:47] (current) – fix spelling typo Doug Mercer |
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| <WRAP centeralign>Figure 1 ALM1000 analog input/output diagram</WRAP> | <WRAP centeralign>Figure 1 ALM1000 analog input/output diagram</WRAP> |
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| {{ :university:tools:m1k_analog_input_f2.jpg?200 |}} | {{ :university:courses:alm1k:m2k-convert-f1.png?400 |}} |
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| <WRAP centeralign>Figure 2 Analog I/O connector</WRAP> | <WRAP centeralign>Figure 2 Analog I/O connector (left Rev D, right Rev F)</WRAP> |
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| {{ :university:tools:m1k_adapter_f3.png?600 |}} | {{ :university:tools:m1k_adapter_f3.png?600 |}} |
| <WRAP centeralign>Figure 3 Detail of analog input switching</WRAP> | <WRAP centeralign>Figure 3 Detail of analog input switching</WRAP> |
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| As we can see from figure 3 switch S<sub>1</sub> disconnects the CH A/B pins from the output drivers, putting that channel in the high impedance mode. Normally, S<sub>4</sub> is closed connecting the analog input buffer ( voltmeter in figure 1 ) to the CH A/B pins. It is also important to note that the white circle pin is connected to CH A/B when S<sub>4</sub> is closed. If S<sub>4</sub> is opened then the analog input buffer is disconnected from the CH A/B pins and is now only available at the pin with the white circle. | As we can see from figure 3 switch S<sub>1</sub> disconnects the CH A/B pins from the output drivers, putting that channel in the high impedance mode. Normally, S<sub>4</sub> is closed connecting the analog input buffer ( voltmeter in figure 1 ) to the CH A/B pins. It is also important to note that the white circle pin on Rev D boards and AIN/BIN on Rev F boards, is connected to CH A/B when S<sub>4</sub> is closed. If S<sub>4</sub> is opened then the analog input buffer is disconnected from the CH A/B pins and is now only available at the pin with the white circle or AIN/BIN pins. |
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| The signals and power supplies that ADALM1000 can generate are limited by the +5 V USB power available from the computer. The analog inputs can measure 0 to +5 volt signals. Generally, this is not an issue when measuring the characteristics of simple passive two terminal devices and simple circuits powered from the provided +5 V supply. However, LC resonate circuits such as oscillators, DC-DC boost converters and other circuits can readily generate voltages beyond their input power supply voltage. To use the ALM1000 to experiment with a broader range of electronic circuits and systems we would like to be able to measure a wider range of input voltages. | The signals and power supplies that ADALM1000 can generate are limited by the +5 V USB power available from the computer. The analog inputs can measure 0 to +5 volt signals. Generally, this is not an issue when measuring the characteristics of simple passive two terminal devices and simple circuits powered from the provided +5 V supply. However, LC resonate circuits such as oscillators, DC-DC boost converters and other circuits can readily generate voltages beyond their input power supply voltage. To use the ALM1000 to experiment with a broader range of electronic circuits and systems we would like to be able to measure a wider range of input voltages. |
