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參數資料
| 型號： | AD53041KRP |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號調理 |
| 英文描述： | High Speed Active Load with Inhibit Mode |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO20 |
| 封裝： | POWER, SOIC-20 |
| 文件頁數： | 1/4頁 |
| 文件大?。?/td> | 77K |
| 代理商： | AD53041KRP |
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.
a
AD53041
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
High Speed Active Load
with Inhibit Mode
FUNCTIONAL BLOCK DIAGRAM
FEATURES
6
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
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 I
OH
and I
OL
currents. I
OH
and I
OL
currents are determined by applying a corresponding voltage
(5 V = 50 mA, 16 mA, 5 mA) to the I
OHPGM
and I
OLPGM
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 I
OH
to I
OL
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 I
OH
or I
OL
into Inhibit of less than 2.0 ns, the AD53041 can be electrically
removed from the signal path “on the fly.”
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.
V
CC
V
EE
AGND
I
OLOUT
V
COMOUT
OUT_SENSE
I
OHOUT
I
OLRTN
I
OHRTN
INH
INH
I
OHPGM
V
COMIN
I
OLPGM
GAINA
GAINB
GND
AD53041
TO DUT
0.1
m
F
0.1
m
F
1
0.1
m
F
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.
V
IS THE POSITIVE SUPPLY, V
IS THE NEGATIVE SUPPLY.
ALL GROUND PINS SHOULD BE CONNECTED TO THE SYSTEM
ANALOG GROUND PLANE.
Figure 1. Typical Application Circuit
VOLTAGE-TO-CURRENT
CONVERTER
VOLTAGE-TO-CURRENT
CONVERTER
AD53041
I
OLOUT
I
OLRTN
I
OHRTN
I
OHOUT
V
COMOUT
V
BUFFER
INH
INH
I
OHPGM
V
COMIN
OUT_SENSE
I
OLPGM
GAINB
GAINA
GAINA GAINB FULL-SCALE CURRENT
0
0
1
1
1
0
1
0
50mA
16mA
5mA
NOT VALID
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