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参数资料
| 型号： | INA271AID |
| 英文描述： | Voltage Output, Unidirectional Measurement Current-Shunt Monitor |
| 中文描述： | 电压输出，单向测量电流并联监视器 |
| 文件页数： | 8/13页 |
| 文件大小： | 299K |
| 代理商： | INA271AID |
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SBOS381 FEBRUARY 2007
www.ti.com
8
OUTPUT VOLTAGE RANGE
The output of the INA270 and INA271 is accurate within
the output voltage swing range set by the power-supply
pin, V+.
The INA270 and INA271 readily enable the inclusion of
filtering between the preamp output and buffer input.
Single-pole filtering can be accomplished with a single
capacitor because of the 96k
output impedance at PRE
OUT on pin 3; see Figure 2a.
The INA270 and INA271 readily lend themselves to
second-order Sallen-Key configurations, as shown in
Figure 2b. When designing these configurations consider
that the PRE OUT 96k
output impedance exhibits an
initial variation of
±
30% with the addition of a
2200ppm/
°
C temperature coefficient.
ACCURACY VARIATIONS AS A RESULT OF
V
SENSE
AND COMMON-MODE VOLTAGE
The accuracy of the INA270 and INA271 current shunt
monitors is a function of two main variables: V
SENSE
(V
IN+
V
IN
) and common-mode voltage, V
CM
, relative to the
supply voltage, V
S
. V
CM
is expressed as (V
IN+
+ V
IN
)/2;
however, in practice, V
CM
is seen as the voltage at V
IN+
because the voltage drop across V
SENSE
is usually small.
This section addresses the accuracy of these specific
operating regions:
Normal Case 1: V
SENSE
≥
20mV, V
CM
≥
V
S
Normal Case 2: V
SENSE
≥
20mV, V
CM
< V
S
Low V
SENSE
Case 1: V
SENSE
< 20mV, 16V
≤
V
CM
< 0
Low V
SENSE
Case 2: V
SENSE
< 20mV, 0V
≤
V
CM
≤
V
S
Low V
SENSE
Case 3: V
SENSE
< 20mV, V
S
< V
CM
≤
80V
A1
A2
SinglePole Filter
Capacitor
+2.7V to +18V
5k
5k
96k
R
L
PRE OUT
BUF IN
GND
Output
IN
IN+
V+
Load
Supply
R
S
A1
A2
SecondOrder, SallenKey Filter Connection
+2.7V to +18V
C
FILT
C
FILT
5k
5k
96k
R
L
PRE OUT
BUF IN
GND
Output
IN
IN+
V+
Load
Supply
R
S
R
S
a) SinglePole Filter
b) SecondOrder, SallenKey Filter
INA270
INA270
Figure 2. The INA270INA271 can be easily connected for first or second order filtering. Remember to
use the appropriate buffer gain (INA270 = 1.4, INA271 = 2) when designing Sallen-Key configurations.
相关PDF资料 |
PDF描述 |
|---|---|
| INA271AIDR | Voltage Output, Unidirectional Measurement Current-Shunt Monitor |
| IS-5 | One Channel/ ISD-5 Two Channel/ ISQ-5 Four Channel Optically Coupled Isolat |
| IS25C64-3G | EEPROM |
| IS42S16100-10T | x16 SDRAM |
| IS42S16100-6T | x16 SDRAM |
相关代理商/技术参数 |
参数描述 |
|---|---|
| INA271AIDG4 | 功能描述:电流和电力监控器、调节器 Vltg Output Hi-Side Msrmt Crnt-Shunt Mon RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| INA271AIDR | 功能描述:电流和电力监控器、调节器 Vltg Output H-Side Measurement RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| INA271AIDRG4 | 功能描述:电流和电力监控器、调节器 Vltg Output Hi-Side Msrmt Crnt-Shunt Mon RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| INA271AQDRQ1 | 功能描述:电流和电力监控器、调节器 Auto Cat Unidir- Msrmt Crnt-Shunt Mon RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| INA271-HT | 制造商:TI 制造商全称:Texas Instruments 功能描述:VOLTAGE OUTPUT, UNIDIRECTIONAL MEASUREMENT CURRENT-SHUNT MONITOR |
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