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ADR360 Datasheet(PDF) 18 Page - Analog Devices |
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ADR360 Datasheet(HTML) 18 Page - Analog Devices |
18 / 20 page ADR360/ADR361/ADR363/ADR364/ADR365/ADR366 Rev. A | Page 18 of 20 General-Purpose Current Source Many times in low power applications, the need arises for a precision current source that can operate on low supply voltages. The ADR36x can be configured as a precision current source (see Figure 36). The circuit configuration illustrated is a floating current source with a grounded load. The reference’s output voltage is bootstrapped across RSET, which sets the output current into the load. With this configuration, circuit precision is maintained for load currents ranging from the reference’s supply current, typically 150 μA, to approximately 5 mA. NC GND VIN ADR36x TRIM VOUT 1 2 3 5 4 ISY ISET + ISY ISET R1 P1 +VDD RL RSET Figure 36. Precision Current Source Trim Terminal The ADR36x trim terminal can be used to adjust the output voltage over a nominal voltage. This feature allows a system designer to trim system errors by setting the reference to a voltage other than the standard voltage option. Resistor R1 is used for fine adjustment and can be omitted if desired. The resistor values should be carefully chosen to ensure that the maximum current drive of the part is not exceeded. 1 2 3 5 4 +VDD NC GND VIN ADR36x TRIM VOUT VOUT R1 100k Ω POT 10k Ω R2 1k Ω Figure 37. ADR36x Trim Configuration |
Número de pieza similar - ADR360 |
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Descripción similar - ADR360 |
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