參數(shù)資料
型號(hào)： INA270_07
英文描述： Voltage Output, Unidirectional Measurement Current-Shunt Monitor
中文描述： 電壓輸出，單向測(cè)量電流并聯(lián)監(jiān)視器
文件頁(yè)數(shù)： 8/17頁(yè)
文件大小： 360K
代理商： INA270_07
www.ti.com
APPLICATIONS INFORMATION
BASIC CONNECTION
Figure 15
shows the basic connection of the INA270
and INA271. The input pins, IN+ and IN–, should be
connected as closely as possible to the shunt
resistor to minimize any resistance in series with the
shunt resistance.
POWER SUPPLY
The input circuitry of the INA270 and INA271 can
accurately measure beyond its power-supply voltage,
V+. For example, the V+ power supply can be 5V,
whereas the load power-supply voltage is up to
+80V. The output voltage range of the OUT terminal,
however,
is
limited
by
power-supply pin.
SELECTING R
S
The value chosen for the shunt resistor, R
, depends
on the application and is a compromise between
small-signal accuracy and maximum permissible
voltage loss in the measurement line. High values of
R
S
provide better accuracy at lower currents by
minimizing the effects of offset, while low values of
R
minimize voltage loss in the supply line. For most
applications, best performance is attained with an R
S
value that provides a full-scale shunt voltage range
of 50mV to 100mV. Maximum input voltage for
accurate measurements is (V
S
– 0.2)/Gain.
A1
A2
Single-Pole Filter
Capacitor
+2.7V to +18V
5k
W
5k
W
96k
W
R
L
PRE OUT
BUF IN
GND
OUT
IN
-
IN+
V+
Load
-
16V to +80V
Supply
R
S
INA270
0.01 F
m
0.1 F
m
INA270
INA271
SBOS381A–FEBRUARY 2007–REVISED APRIL 2007
the
voltages
on
the
Power-supply bypass capacitors are required for
stability. Applications with noisy or high-impedance
power supplies may require additional decoupling
capacitors to reject power-supply noise. Minimum
bypass capacitors of 0.01
μ
F and 0.1
μ
F in value
should be placed close to the supply pins. Although
not
mandatory,
an
additional
capacitor placed in parallel with the other bypass
capacitors
may
be
useful
particularly noisy supplies.
10mF
electrolytic
in
applications
with
Figure 15. INA270 Basic Connections
8
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INA270AID 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Vltg Output H-Side Measurement RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel
INA270AIDG4 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Vltg Output Hi-Side Msrmt Crnt-Shunt Mon RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel
INA270AIDR 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Vltg Output H-Side Measurement RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel
INA270AIDRG4 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Vltg Output Hi-Side Msrmt Crnt-Shunt Mon RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel
INA270A-Q1 制造商:TI 制造商全稱:Texas Instruments 功能描述:VOLTAGE-OUTPUT UNIDIRECTIONAL-MEASUREMENT CURRENT-SHUNT MONITORS
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