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參數(shù)資料
| 型號： | MAX4071AUA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Bidirectional, High-Side, Current-Sense Amplifiers with Reference |
| 中文描述： | POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | MICRO, SOP-8 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大小： | 472K |
| 代理商： | MAX4071AUA |
M
Bidirectional, High-Side, Current-Sense
Amplifiers with Reference
12
______________________________________________________________________________________
core, as in metal-film or wire-wound resistors, they are
a straight band of metal and are available in values
under 1
.
Peak Current:
The maximum current through R
SENSE
must be limited to:
I
PEAK
= 0.3V / (R
SENSE
+ R
TRACE
)
where R
TRACE
is the total stray resistance from RS+
and RS- to R
SENSE
. To prevent forwarding the back-to-
back diodes between the differential input, the absolute
maximum of the differential input voltage is 0.3V.
Dynamic Range Considerations
Although the MAX4069
–
MAX4072 have fully symmetri-
cal, bidirectional, V
SENSE
input capability, the output-
voltage range is usually higher from REF to V
CC
and
lower from REF to GND (unless the supply voltage is at
the lowest end of the operating range). Therefore, the
user must consider the dynamic range of current moni-
tored in both directions and choose the supply voltage
and the reference voltage (REFOUT or REFIN) to make
sure the output swing above and below REF is ade-
quate to handle the swings without clipping or running
out of headroom.
Shutdown Mode
When
SHDN
is low, the MAX4069
–
MAX4072 are shut
down and consume only 10μA. In shutdown mode,
OUT is high impedance and turns off. Connect
SHDN
to V
CC
for normal operation.
Power-Supply Bypassing
and Grounding
The MAX4069
–
MAX4072 do not require special
bypassing and respond quickly to transient changes in
line current. You can place a large capacitor at the RS-
terminal (or
“
load
”
side) to decouple the load and,
thereby, reduce the current transients. These capaci-
tors are not required for operation or stability and their
use does not degrade performance.
The MAX4069
–
MAX4072 have been designed as a high-
side current monitor to ease the task of grounding any
battery charger, thermistor, etc., that may be a part of
the battery pack. Grounding these devices requires no
special precautions; follow the same cautionary steps
that apply to the system as a whole. High-current sys-
tems can experience large voltage drops across a
ground plane, and this drop may add to or subtract from
V
OUT.
Using differential measurement between V
OUT
and REF prevents this problem. For highest current-mea-
surement accuracy, use a single-point star ground.
On thin QFN packages, there is an exposed paddle that
does not carry any current, but should also be connect-
ed to the ground plane for rated power dissipation.
FULL-SCALE
CURRENT
(A)
CURRENT-SENSE
RESISTOR (m
)
GAIN
(V/V)
V
SENSE
(mV)
FULL-SCALE OUTPUT
VOLTAGE WITH RESPECT
TO REF (V)
0.075
0.05
0.75
0.5
3.75
2.5
7.5
5.0
15.0
10.0
50
100
50
100
50
100
50
100
50
100
75
50
75
50
75
50
75
50
75
50
3.75
5.0
3.75
5.0
3.75
5.0
3.75
5.0
3.75
5.0
1000
100
20
10
5
Table 1. Recommended Component Values
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4071AUA+ | 功能描述:電流靈敏放大器 Bidirectional High Side Crnt-Sense Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補(bǔ)償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| MAX4071AUA+T | 功能描述:電流靈敏放大器 Bidirectional High Side Crnt-Sense Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補(bǔ)償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| MAX4071AUA-T | 功能描述:電流靈敏放大器 Bidirectional High Side Crnt-Sense Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補(bǔ)償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| MAX4072 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Bidirectional, High-Side, Current-Sense Amplifiers with Reference |
| MAX4072AGA | 制造商:Maxim Integrated Products 功能描述:BIDIRECTIONAL, HIGH-SIDE, CURRENT-SENSE AMPLI - Rail/Tube |
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