PDF AD53041 Data sheet ( Hoja de datos )

Número de pieza	AD53041
Descripción	High Speed Active Load
Fabricantes	Analog Devices
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No Preview Available ! a High Speed Active Load with Inhibit Mode AD53041 FEATURES ؎50 mA Voltage Programmable Current Range Three Selectable Gain Ranges 1.7 ns Propagation Delay Inhibit Mode Function High Speed Differential Inputs for Maximum Flexibility Ultrasmall 20-Lead PSOP Package with Built-In Heatsink APPLICATIONS Automatic Test Equipment Semiconductor Test Systems Board Test Systems FUNCTIONAL BLOCK DIAGRAM GAINA GAINB IOLPGM INH INH VOLTAGE-TO-CURRENT CONVERTER IOLOUT IOLRTN IOHRTN IOHOUT PRODUCT DESCRIPTION The AD53041 is a complete, high speed, current switching load designed for use in linear, digital or mixed signal test systems. Combining a high speed monolithic process with a unique sur- face mount package, this product attains superb electrical per- formance while preserving optimum packaging densities in an ultrasmall 20-lead, PSOP package with a built-in heatsink. Featuring current programmability of up to ± 50 mA, the AD53041 is designed to force the device under test to source or sink the programmed IOH and IOL currents. IOH and IOL currents are determined by applying a corresponding voltage (5 V = 50 mA, 16 mA, 5 mA) to the IOHPGM and IOLPGM pins. The voltage-to-current conversion is performed within the AD53041, thus allowing the current levels to be set by a stan- dard voltage out digital-to-analog converter. The AD53041 transition from IOH to IOL occurs when the out- put voltage of the device under test slews above or below the programmed threshold or commutation voltage. The commuta- tion voltage is programmable from –2 V to +7 V, covering the large spectrum of logic devices while able to support the large current specifications (48 mA) typically associated with line drivers. To test I/O devices, the active load can be switched into a high impedance state (Inhibit Mode), electrically removing the active load from the path through the Inhibit Mode feature. The active load leakage current in Inhibit is typically 100 nA. The Inhibit input circuitry is implemented using high speed differential inputs with a common-mode voltage range of –2 V to +3 V and a maximum differential voltage of 3 V. This allows for direct interface to precision differential ECL timing or the simplicity of switching active load from a single ended TTL or CMOS logic source. With switching speeds from IOH or IOL into Inhibit of less than 2.0 ns, the AD53041 can be electrically removed from the signal path “on the fly.” IOHPGM VCOMIN OUT_SENSE AD53041 VOLTAGE-TO-CURRENT CONVERTER VCOM BUFFER GAINA 0 0 1 1 GAINB 0 1 0 1 FULL-SCALE CURRENT 50mA 16mA 5mA NOT VALID VCOMOUT The AD53041 is available in a 20-lead, PSOP package with a built-in-heatsink and is specified to operate over the ambient commercial temperature range from –25°C to +85°C. INH INH IOHPGM VCOMIN IOLPGM GAINA GAINB AD53041 AGND IOLOUT 0.1␮F 0.1␮F VCC VEE VCOMOUT OUT_SENSE 0.1␮F 1Ω GND IOHOUT IOLRTN IOHRTN TO DUT HSMS-2818 OR EQUIV. NOT SHOWN: THE AGND PINS ARE THE HIGH QUALITY GROUND REFERENCE FOR THE VOLTAGE-TO-CURRENT CONVERTERS. THE GND PINS PROVIDE RETURN PATHS FOR INTERNAL CURRENTS. VCC IS THE POSITIVE SUPPLY, VEE IS THE NEGATIVE SUPPLY. ALL GROUND PINS SHOULD BE CONNECTED TO THE SYSTEM ANALOG GROUND PLANE. Figure 1. Typical Application Circuit REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1998 1 page

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