Help with Digital-to-Analog Converters specifications:
Device Specifications
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| Digital I/O Channels | Digital or discrete channels are used for low-level on-off signals used in applications such as communication, user interface, or control. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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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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| Resolution | Resolution refers to the degree of fineness of the digital word representing the analog value. A ten-bit number contains 210, or 1024, increments. A 0-10V signal could therefore be resolved into approximately 0.01V increments. A 12-bit representation would be in 212 (4096) increments, or divisions of 0.0024V for the same signal. Each additional bit doubles the resolution, and one bit is required for the polarity (sign) of a number. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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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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| Accuracy | Accuracy depends on the signal conditioning linearity, hysteresis, temperature considerations, etc. It is represented here as percent full scale of measurement range. | ||
| Search Logic: | All matching products will have a value less than or equal to the specified value. | ||
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| Isolation | |||
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| Isolated Digital Input | The digital input voltage terminals are isolated. | ||
| Isolated Analog Voltage Input | The input voltage terminals are isolated. | ||
| Channel-to-Channel Isolation | The module channels are isolated from each other. | ||
| 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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| Output Impedance | The impedance that the amplifier appears to present to its output terminals, and thus to the impedance of its load. | ||
| Search Logic: | All matching products will have a value less than or equal to the specified value. | ||
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| Other | Other unlisted types of isolation. | ||
| 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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Outputs
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| Other Output? | Other unlisted or specialized outputs. | ||
| 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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| Voltage Output? | Variable voltage outputs such as 0-10V, ±5V, etc. | ||
| 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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| Current Output? | Variable current level outputs such as 0-20mA, 4-20 mA current loop, etc. | ||
| 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 Output? | The output is a frequency or pulse signal such as amplitude modulation (AM), frequency modulation (FM), or pulse width modulation (PWM) or control. | ||
| 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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| Timer / Counter Output? | The output is a counting or timing of measured events. | ||
| 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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| Relay Output? | With switch-type outputs, the contacts are open or closed depending on the state of one or more of the 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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Computer Bus
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| Computer Bus | |||
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| CompactPCI | Compact PCI (cPCI) is a high-performance industrial bus that uses the electrical standards of the PCI bus and is packaged in a Eurocard. Specifications for the CompactPCI bus are developed and maintained by the PCI Industrial Computers Manufacturers Group (PICMG). cPCI buses are used extensively in systems that require high speed data transfers. Examples include data communication routers and switches, real-time machine control, real-time data acquisition, military systems, etc. | ||
| IEEE 1394 (FireWire®) | IEEE 1394 or FireWire® is an interface standard adopted by the Institute of Electrical and Electronics Engineers (IEEE) for very fast digital data transfers such as streaming video. IEEE 1394 connectors are used to transmit and receive data among FireWire devices, and are designed to replace external high-speed peripheral connections to personal computers, including hard disks, CD-ROMs, DVDs, graphics cards, high-speed scanners, direct video, monitors, etc. Tiny, robust FireWire connectors will also become important parts of home entertainment, communication, and appliance networks. FireWire is a registered trademark of Apple Computer, Inc. | ||
| Industry Pack® Bus (IP) | IndustryPack® (IP) is a mezzanine bus that provides input/output (I/O) capabilities in general-purpose computer systems. IndustryPack is both a registered trademark of GreenSpring computers and a specification maintained by the VITA standards organization (VSO) of the American National Standards Institute (ANSI). IP modules are available in two sizes. Single-size modules are 1.8” x 3.9” (45.3 cm2). Double-size modules are 3.6” x 3.9” (90.6 cm2). | ||
| ISA / EISA | Industry standard architecture (ISA) buses can handle 16-bit data transfers at a clock speed of 8 MHz. They are also capable of handling memory under 16 MB. Extended ISA (EISA) is an enhanced version of the ISA bus. EISA buses run at 8 MHz, are capable of 32-bit data transfers, and can access all memory in the system. | ||
| MIX Bus | Modular interface extension (MIX) is a high-performance stacking and communications interface for connecting expansion modules to a VMEbus baseboard. The MIX bus supports 32-bit data transfers and DMA transfers. It also provides 4 GB of memory addressing capability. | ||
| Multibus (I & II) | Multibus is a modular computer-systems architecture used in embedded applications in telecommunications, medical-devices, manufacturing automation, networking, and other market areas. | ||
| PC/104 (PC/104-Plus, EBX) | PC/104 gets its name from the desktop personal computers designed by IBM (PCs), and from the number of pins used to connect the cards together (104). PC/104 cards are much smaller than ISA-bus cards and stack together eliminating the need for a motherboard, back plane, and/or card cage. PC/104-Plus incorporates the PCI bus into the PC/104 form-factor for faster data transfer. EBX (Embedded Board eXpandable) defines a 5.75" x 8" form factor large enough to implement a powerful single-board computer. It supports PC/104 expansion. | ||
| PCI | Peripheral component interconnect (PCI) is a local bus system designed for high-end computer systems. PCI buses transfer 32 or 64 bits of data at a clock speed of 33 MHz. They also support 3 to 5 critical peripherals, which are either integrated directly onto the motherboard or added via expansion cards. PCI buses fully support cards that were developed for standard I/O buses. | ||
| PCMCIA (PC Card) | PCMCIA devices (PC Cards) are credit-card-sized peripherals predominantly used in laptop computers. The PCMCIA adapter takes the place of a COM port on a standard bus. The card is plugged into a 68-pin host socket that is connected either to the motherboard or an expansion bus. An adapter then translates the PCMCIA signals into signals usable by the computer's bus. | ||
| PXI Bus | PCI extensions for instrumentation (PXI) is a superset of CompactPCI that adds timing and triggering functions, imposes requirements for documenting environmental tests, and establishes a standard Windows®-based software framework. Windows is a registered trademark of the Microsoft Corporation. | ||
| PMC Bus | PMC is a form factor, not a bus. It is electrically equivalent to the PCI bus, but has a different shape and bus connectors. PMC is designed for rugged applications and provides a secure mounting platform for VME mezzanine boards. | ||
| STD Bus | STD is often called the "blue collar bus" because of its rugged design and use in industrial and process control applications. There are three STD bus types: STD Z80, STD80, and STD 32. The STD Z80 bus and the STD 80 bus use a 56-pin backplane with 0.125" contact spacing for card interconnection. The STD 32 Bus provides a 32-bit wide data bus to support 8, 16, and 32-bit data transfers. Dynamic bus sizing, which varies the data path size depending on the requirements of the peripheral card being addressed, gives the STD 32 bus added flexibility. | ||
| USB | Universal serial bus (USB) is a 4-wire, 12-Mbps serial bus for low-to-medium speed peripheral device connections to personal computers (PC), including keyboards, mice, modems, printers, joysticks, audio functions, monitor controls, etc. The USB design is standardized by the USB Implementers Forum (USBIF), an organization that includes leading companies from the computer and electronics industries. The current USB specification is USB 2.0, which supports data transfer rates of up to 480 Mbps. | ||
| VMEbus | VMEbus is based on the VME standard, which defines mechanical specifications such as board dimensions, connector specifications and enclosure characteristics, as well as the electronic specifications for sub-bus structures, signal functions, timing, signal voltage levels, and master/slave configurations. The VMEbus uses 3U and 6U Eurocards, rugged circuit boards that provide a 96-pin plug instead of an edge connector for durability. Several VMEbus varieties are available. | ||
| VXI / MXI Bus | VME extensions for instrumentation (VXI) are electrical and mechanical standards used mainly with automatic test equipment (ATE). VXI allows equipment from different vendors to work together in a common control and packaging environment. Multisystem extension interface (MXI) is an 8MB/s bus for connection of up to 8 digital devices and expansion boards. | ||
| Other | Other unlisted, specialized, or proprietary configurations. | ||
| 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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