Analog Output Primer - Revision history

Mparadis at 20:35, 25 February 2015

2015-02-25T20:35:14Z

← Older revision		Revision as of 20:35, 25 February 2015
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	If you need to generate an analog signal with a higher current limit, you can build a simple amplifier circuit in between the analog output and the load.		If you need to generate an analog signal with a higher current limit, you can build a simple amplifier circuit in between the analog output and the load.

			===Avoiding Startup Transients===

			When an analog output board is first powered up, the voltage level on the output will be unpredictable for a few milliseconds. If this behaviour is causing problems for your system, you may want to put a [[Relay Primer\|relay]] on the output and write your program to switch the relay on after an appropriate amount of time has elapsed after startup. For output boards that support multiple range settings, this method could also be used to avoid transient behaviour when switching the range setting.

Burley: /* Basic Use */

2012-08-10T16:43:53Z

Basic Use

← Older revision		Revision as of 16:43, 10 August 2012
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	===Basic Use===		===Basic Use===

	To use an analog output, simply connect the output terminals to the device you want to supply an analog signal to. Make sure that the device is specified to draw less current than the maximum current per channel of the analog output. If you exceed the maximum current of a Phidget Analog Output, an over-current error will be thrown, because passing the current limit will cause the output voltage to vary depending on the resistance of the load and thus lose accuracy. For example, the [~~http://www.phidgets.com~~/products.php?product_id=1002 1002 - PhidgetAnalog 4-Output] is most accurate when supplying 5 mA or less. The actual limit may vary from channel to channel, so it's a good idea to stay as far from the current limit as your application will allow.		To use an analog output, simply connect the output terminals to the device you want to supply an analog signal to. Make sure that the device is specified to draw less current than the maximum current per channel of the analog output. If you exceed the maximum current of a Phidget Analog Output, an over-current error will be thrown, because passing the current limit will cause the output voltage to vary depending on the resistance of the load and thus lose accuracy. For example, the [{{SERVER}}/products.php?product_id=1002 1002 - PhidgetAnalog 4-Output] is most accurate when supplying 5 mA or less. The actual limit may vary from channel to channel, so it's a good idea to stay as far from the current limit as your application will allow.

	If you need to generate an analog signal with a higher current limit, you can build a simple amplifier circuit in between the analog output and the load.		If you need to generate an analog signal with a higher current limit, you can build a simple amplifier circuit in between the analog output and the load.

Mparadis at 17:32, 3 August 2012

2012-08-03T17:32:58Z

← Older revision		Revision as of 17:32, 3 August 2012
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	===How it works===		===How it works===

			[[File:Analog_Out_Diagram.jpg\|link=\|thumb\|300px\|A simplified schematic of a Phidgets Inc. Analog Output.<br>[[Media:Analog_Out_Diagram.jpg\|Full-Sized Image]]]]

	When the user selects an output value in software, the digital-to-analog converter (DAC) on the board converts this digital value into an analog voltage signal. The resulting signal is filtered through a ferrite bead, and reaches the output on the terminal block. The transil diode protects the analog outputs from electrostatic discharge.		When the user selects an output value in software, the digital-to-analog converter (DAC) on the board converts this digital value into an analog voltage signal. The resulting signal is filtered through a ferrite bead, and reaches the output on the terminal block. The transil diode protects the analog outputs from electrostatic discharge.

Mparadis at 17:32, 3 August 2012

2012-08-03T17:32:45Z

← Older revision		Revision as of 17:32, 3 August 2012
Line 13:		Line 13:
	===How it works===		===How it works===

	~~[[File:Analog_Out_Diagram.jpg\|link=\|thumb\|300px\|A simplified schematic of a Phidgets Inc. Analog Output.<br>[[Media:Analog_Out_Diagram.jpg\|Full-Sized Image]]]]~~

	When the user selects an output value in software, the digital-to-analog converter (DAC) on the board converts this digital value into an analog voltage signal. The resulting signal is filtered through a ferrite bead, and reaches the output on the terminal block. The transil diode protects the analog outputs from electrostatic discharge.		When the user selects an output value in software, the digital-to-analog converter (DAC) on the board converts this digital value into an analog voltage signal. The resulting signal is filtered through a ferrite bead, and reaches the output on the terminal block. The transil diode protects the analog outputs from electrostatic discharge.

Mparadis: Created page with "Category: Primer TOC ==Introduction== An analog output is simply an interface that takes digital data and outputs it in the form of an analog signal. Since this typ..."

2012-08-02T18:41:04Z

Created page with "Category: Primer __TOC__ ==Introduction== An analog output is simply an interface that takes digital data and outputs it in the form of an analog signal. Since this typ..."

New page

[[Category: Primer]]

__TOC__

==Introduction==

An analog output is simply an interface that takes digital data and outputs it in the form of an analog signal. Since this type of output is meant to generate signals, it is usually low current (20mA or less) and is not meant to be used for supplying high-power devices. The current can't be controlled, so this output is only suitable for interfacing with devices that accept voltage signals.

Analog outputs are commonly used for generating simple waveforms for test purposes, employing dimmer control on low-current electronics, or controlling devices such as [[Solid State Relay Primer#Proportional_Control_SSR|proportional control relays]].

==Technical Explanation==

===How it works===

[[File:Analog_Out_Diagram.jpg|link=|thumb|300px|A simplified schematic of a Phidgets Inc. Analog Output.<br>[[Media:Analog_Out_Diagram.jpg|Full-Sized Image]]]]

When the user selects an output value in software, the digital-to-analog converter (DAC) on the board converts this digital value into an analog voltage signal. The resulting signal is filtered through a ferrite bead, and reaches the output on the terminal block. The transil diode protects the analog outputs from electrostatic discharge.

<br clear=all>

===Basic Use===

To use an analog output, simply connect the output terminals to the device you want to supply an analog signal to. Make sure that the device is specified to draw less current than the maximum current per channel of the analog output. If you exceed the maximum current of a Phidget Analog Output, an over-current error will be thrown, because passing the current limit will cause the output voltage to vary depending on the resistance of the load and thus lose accuracy. For example, the [http://www.phidgets.com/products.php?product_id=1002 1002 - PhidgetAnalog 4-Output] is most accurate when supplying 5 mA or less. The actual limit may vary from channel to channel, so it's a good idea to stay as far from the current limit as your application will allow.

If you need to generate an analog signal with a higher current limit, you can build a simple amplifier circuit in between the analog output and the load.

Analog Output Primer - Revision history

Mparadis at 20:35, 25 February 2015

Burley: /* Basic Use */

Mparadis at 17:32, 3 August 2012

Mparadis at 17:32, 3 August 2012

Mparadis: Created page with "Category: Primer __TOC__ ==Introduction== An analog output is simply an interface that takes digital data and outputs it in the form of an analog signal. Since this typ..."

Mparadis: Created page with "Category: Primer TOC ==Introduction== An analog output is simply an interface that takes digital data and outputs it in the form of an analog signal. Since this typ..."