Help with Signal Amplifiers specifications:
Amplifier Specifications
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| Analog Input Channels: | This is the maximum number of analog channel inputs. The single-ended number is specified when single-ended inputs are available as twice the number of differential inputs. Differential channels use the difference between two signals as an input; common mode is filtered out. In some systems, differential inputs are combinations of two single-ended inputs. When this is the case, twice the number of differential channels are available as single-ended inputs. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Differential Channels | Differential channels have two inputs. The signal to process is the voltage (V) difference between the two inputs. For example, if one reading is 4.93 V and the other reading is 5.16 V, the meaningful value is the 0.23 V difference between the two. Often, this applies to precision measurements where the difference between two low-voltage inputs is small but critical. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Gain Range | Gain is the factor by which the input signal is multiplied. Gains are frequently greater than unity, but may be fractional when a reduction (attenuation) of signal amplitude is desired. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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| Maximum Output | This is the limit of output voltage. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Bandwidth | Bandwidth is the difference between the high and low limits of the frequency response, typically defined by a variation from a nominal value by a stated value such as 3 dB. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Input Impedance | Impedance (Z) is the resistance to alternating signal flow and is a result of the resistance, capacitance, and the inductance of the circuitry of a device. Input impedance of an amplifier is the equivalent impedance that the signal input sees. Input impedance is typically specified to be much greater than the impedance of a sensor whose signal it is amplifying. Some applications, such as in the power and acoustic fields, require impedance matching of devices. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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Signal Inputs
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| DC Voltage Input | |||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| DC Current Input? | |||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| AC Voltage Input? | |||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| AC Current Input? | |||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Frequency Input? | Input for varying frequency, pulse, or other specialized waveform. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Charge Input? | Charge is the output of a piezoelectric device. A charge signal typically requires filtering and amplification. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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Sensor Inputs
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| Accelerometer Input | The inputs are specifically for an accelerometer, such as a piezoelectric or current-fed sensor. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Thermocouple Input | The inputs are for a thermocouple or thermocouple series. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Thermistor Input | Inputs for thermistors and potentiometers handle variable resistance as a function of the process being measured. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| RTD Input | The inputs are designed for a resistance temperature detector (RTD). | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Strain Gauge / Bridge Input | The inputs are designed for a Wheatstone bridge, in full, half, or quarter bridge configurations. Strain gauges are sensors which commonly use Wheatstone bridges. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| LVDT / RVDT Input | The inputs are for a linear (LVDT) or rotary (RVDT) variable differential transformer. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Other Input? | Other unlisted or specialized inputs. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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Form Factor
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| Form Factor | |||
| Your choices are... | |||
| Printed Circuit Board (PCB) | Devices are printed circuit boards (PCBs) that attach to enclosures or plug directly into computer backplanes. | ||
| Panel / Chassis Mount | Devices attach to a panel or bolt onto a chassis. | ||
| Modular Bay / Slot System | Devices stack in modular bays or slots, and can be interfaced to other units. | ||
| Rack Mount | Devices are rack-mounted and fit inside enclosures such as a standard 19 in. telecommunications rack. | ||
| DIN Rail | Devices mount on a standard DIN rail. DIN is an acronym for Deutsches Institut für Normung (DIN), a German national organization for standardization. | ||
| Stand Alone | Devices are benchtop or floor-standing units with a full casing or cabinet, and an integral interface. | ||
| Other | Other unlisted form factors. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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User Interface
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| User Interface | |||
| Your choices are... | |||
| None | There is no user input or programmability. Instead, there is "black box" style of storage for download or processing elsewhere. | ||
| Front Panel and Display | There are integral controls, a keypad, and/or a display on the panel of the unit. | ||
| Touch Screen | The device's visual display screen is contact-sensitive to allow direct input. | ||
| Hand-held / Remote Programmer | The interface unit is designed specifically to be held in the hand while the user enters program parameters, and may include remote programming. | ||
| Computer Programmable | The device is interfaced to a separate supervisory or host computer. | ||
| Other | Other unlisted user interface methods. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Integral Filter? | Integral filters allow certain signal frequencies to pass while attenuating others. These filters can also operate on signal phase. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Networkable System? | Devices are designed to communicate with or be a node of a digital network. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Programmable Gain? | Amplifier gain may be adjusted according to the application needs. Adjustment may be from a local interface (such as a front panel) or from a computer interface. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Sample-and-Hold Amplifier | Sample-and-hold conditioners "capture" samples of the signal. The signal is quantized to discrete levels and can be sent to conform to any timing parameters of the system. They can use triggers for initiating a sample. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Isolation Amplifier | Isolation amplifiers are designed specifically to isolate high DC levels from the data acquisition device while passing the relatively small AC or differential signal. The inputs and outputs are electrically isolated. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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