参数资料
型号: ADM4073TWRJZ-REEL7
厂商: ANALOG DEVICES INC
元件分类: 电源管理
英文描述: Low Cost, Voltage Output, High-Side, Current-Sense Amplifier
中文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6
封装: LEAD FREE, MO-178AB, SOT-23, 6 PIN
文件页数: 1/12页
文件大小: 212K
代理商: ADM4073TWRJZ-REEL7
Low Cost, Voltage Output,
High-Side, Current-Sense Amplifier
ADM4073
FEATURES
Low cost, compact, current-sense solution
Three available gain versions
20 V/V (ADM4073T)
50 V/V (ADM4073F)
100 V/V (ADM4073H)
Typical ±1.0% full-scale accuracy
500 μA supply current
Wide 1.8 MHz bandwidth
3 V to 28 V operating supply
Wide 2 V to 28 V common-mode range
Independent of supply voltage
Operates from 40°C to +125°C
Available in a 6-lead SOT-23 package
Pin-to-pin compatibility with the MAX4073
APPLICATIONS
Cell phones, PDAs
Notebook computers
Portable/battery-powered systems
Smart battery packs/chargers
Automotive
Power management systems
PA bias control
General system/board-level current monitoring
Precision current sources
Rev. 0
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 that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2006 Analog Devices, Inc. All rights reserved.
www.analog.com
FUNCTIONAL BLOCK DIAGRAM
2V TO 28V
3V TO 28V
0.1μF
V
OUT
R
SENSE
I
LOAD
I
RG1
V
OUT
RS+
GND
AV
RS–
V
CC
RG2
RGD = 12k
RG1
ADM4073
I
RGD
MIRROR
0
Figure 1.
APPLICATION DIAGRAM
2V TO 28V
3V TO 28V
0.1μF
V
OUT
R
SENSE
OUT
ADC
RS+
GND
RS–
V
CC
ADM4073
0
Figure 2.
GENERAL DESCRIPTION
The ADM4073 is a low cost, high-side, current-sense amplifier
ideal for small portable applications such as cell phones,
notebook computers, PDAs, and other systems where current
monitoring is required. The device is available in three different
gain models, eliminating the need for gain-setting resistors.
Because the ground path is not interrupted, the ADM4073 is
particularly useful in rechargeable battery-powered systems,
while its wide 1.8 MHz bandwidth makes it suitable for use
inside battery-charger control loops. The input common-mode
range of 2 V to 28 V is independent of the supply voltage.
The voltage on the output pin is determined by the current
flowing through the selectable external sense resistor and the
gain of the version selected. The operating range is 3 V to 28 V
with a typical supply current of 500 μA. The ADM4073 is
available in a 6-lead SOT-23 package and is specified over the
automotive operating temperature range (40°C to +125°C).
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