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PDF ADM4073 Data sheet ( Hoja de datos )
| Número de pieza | ADM4073 | |
| Descripción | Current-Sense Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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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
FUNCTIONAL BLOCK DIAGRAM
2V TO 28V
ILOAD
RSENSE
RS+ RS–
VOUT
3V TO 28V VCC
0.1µF
RG1
IRG1
RG2
AV
ADM4073
CURRENT
MIRROR
IRGD
VOUT
RGD = 12kΩ
GND
Figure 1.
APPLICATION DIAGRAM
2V TO 28V
RSENSE
VOUT
3V TO 28V
0.1µF
RS+ RS–
VCC
OUT
ADM4073
ADC
GND
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.
Figure 2.
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).
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.
1 page  
ADM4073
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
ADM4073xWRJ
GND 1
6 OUT
GND
2
TOP VIEW
(Not to Scale)
5
RS–
VCC 3
4 RS+
Figure 3. Pin Configuration
Table 4. Pin Function Descriptions
Pin No. Mnemonic Description
1, 2 GND
Chip Ground Pin.
3 VCC
Chip Power Supply. Requires a 0.1μF capacitor to ground.
4 RS+
Power-Side Connection to the External Sense Resistor.
5 RS−
Load-Side Connection to the External Sense Resistor.
6 OUT
Voltage Output. VOUT is proportional to VSENSE. Output impedence is approximately 12 kΩ.
Rev. 0 | Page 5 of 12
5 Page 
OUTLINE DIMENSIONS
2.90 BSC
1.60 BSC
PIN 1
INDICATOR
1.30
1.15
0.90
0.15 MAX
65
4
12 3
2.80 BSC
1.90
BSC
0.95 BSC
1.45 MAX
0.22
0.08
0.50
0.30
SEATING
PLANE
10° 0.60
4° 0.45
0° 0.30
COMPLIANT TO JEDEC STANDARDS MO-178-AB
Figure 27. 6-Lead Small Outline Transistor Package [SOT-23]
(RJ-6)
Dimensions shown in millimeters
ADM4073
ORDERING GUIDE
Model
ADM4073TWRJZ-REEL71
ADM4073FWRJZ-REEL71
ADM4073HWRJZ-REEL71
1 Z = Pb-free part.
Gain
20
50
100
Temperature Range
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
Package Description
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
Package Option
RJ-6
RJ-6
RJ-6
Branding
M2E
M2C
M2D
Rev. 0 | Page 11 of 12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ADM4073.PDF ] | |
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