參數(shù)資料
型號(hào)： INA332AIDGKT
元件分類(lèi)： 測(cè)量放大器
英文描述： Precision Instrumentation Amplifier
中文描述： 精密儀表放大器
文件頁(yè)數(shù)： 12/17頁(yè)
文件大小： 292K
代理商： INA332AIDGKT
INA332, INA2332
SBOS216A
12
www.ti.com
OFFSET VOLTAGE ERROR CALCULATION
The offset voltage (V
OS
) of the INA332AIDGK is specified at
a maximum of 500
μ
V with a +5V power supply and the
common-mode voltage at V
S
/2. Additional specifications for
power-supply rejection and common-mode rejection are pro-
vided to allow the user to easily calculate worst-case ex-
pected offset under the conditions of a given application.
Power-Supply Rejection Ratio (PSRR) is specified in
μ
V/V.
For the INA332, worst case PSRR is 200
μ
V/V, which means
for each volt of change in power supply, the offset may shift
up to 200
μ
V. Common-Mode Rejection Ratio (CMRR) is
specified in dB, which can be converted to
μ
V/V using the
following equation:
CMRR (in
μ
V/V) = 10
[(CMRR in dB)/
–
20]
10
6
For the INA332, the worst case CMRR over the specified
common-mode range is 60dB (at G = 25) or about 30
μ
V/V
This means that for every volt of change in common-mode,
the offset will shift less than 30
μ
V.
These numbers can be used to calculate excursions from the
specified offset voltage under different application condi-
tions. For example, an application might configure the ampli-
fier with a 3.3V supply with 1V common-mode. This configu-
ration varies from the specified configuration, representing a
1.7V variation in power supply (5V in the offset specification
versus 3.3V in the application) and a 0.65V variation in
common-mode voltage from the specified V
S
/2.
Calculation of the worst-case expected offset would be as
follows:
Adjusted V
OS
= Maximum specified V
OS
+
(power-supply variation)
PSRR +
(common-mode variation)
CMRR
V
OS
= 0.5mV + (1.7V
200
μ
V) + (0.65V
30
μ
V)
=
±
0.860mV
However, the typical value will be smaller, as seen in the
Typical Characteristics.
FEEDBACK CAPACITOR IMPROVES RESPONSE
For optimum settling time and stability with high-impedance
feedback networks, it may be necessary to add a feedback
capacitor across the feedback resistor, R
F
, as shown in
Figure 8. This capacitor compensates for the zero created by
the feedback network impedance and the INA332
’
s RG-pin
input capacitance (and any parasitic layout capacitance).
The effect becomes more significant with higher impedance
networks. Also, R
X
and C
L
can be added to reduce high-
frequency noise.
It is suggested that a variable capacitor be used for the
feedback capacitor since input capacitance may vary be-
tween instrumentation amplifiers, and layout capacitance is
difficult to determine. For the circuit shown in Figure 8, the
value of the variable feedback capacitor should be chosen by
the following equation:
R
IN
C
IN
= R
F
C
F
Where C
IN
is equal to the INA332
’
s RG-pin input capacitance
(typically 3pF) plus the layout capacitance. The capacitor can
be varied until optimum performance is obtained.
FIGURE 8. Feedback Capacitor Improves Dynamic Perfor-
mance.
INA332
V+
V
OUT
R
IN
R
IN
C
IN
= R
F
C
F
R
F
R
X
C
L
C
IN
Where C
is equal to the INA332
’
s input capacitance
(approximately 3pF) plus any parastic layout capacitance.
5
3
2
8
7
6
4
1
RG
Shutdown
V
IN
–
V
–
V
IN
+
REF
C
F
相關(guān)PDF資料
PDF描述
INA2332AIPWR Precision Instrumentation Amplifier
INA2332AIPWT Precision Instrumentation Amplifier
INA270_07 Voltage Output, Unidirectional Measurement Current-Shunt Monitor
INA270AIDG4 Voltage Output, Unidirectional Measurement Current-Shunt Monitor
INA270AIDRG4 Voltage Output, Unidirectional Measurement Current-Shunt Monitor
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
INA332AIDGKT 制造商:Texas Instruments 功能描述:AMP INST CMOS SMD MSOP8 制造商:Texas Instruments 功能描述:AMP INST, CMOS, SMD, MSOP8
INA332AIDGKT 制造商:Texas Instruments 功能描述:INST AMP CMOS SINGL R/R 8MSOP 制造商:Texas Instruments 功能描述:INST AMP, CMOS, SINGL, R/R, 8MSOP 制造商:Texas Instruments 功能描述:INST AMP, CMOS, SINGL, R/R, 8MSOP; No. of Amplifiers:1; Input Offset Voltage:8mV; Bandwidth:500kHz; Supply Voltage Range:2.5V to 5.5V; Amplifier Case Style:MSOP; No. of Pins:8; Amplifier Output:Rail to Rail; CMRR:73dB; Slew ;RoHS Compliant: Yes
INA332AIDGKTG4 功能描述:儀表放大器 Lo-Pwr Single Sply CMOS Low Cost RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk
INA333 制造商:TI 制造商全稱:Texas Instruments 功能描述:Micro-Power (50uA), Zer┆-Drift, Rail-to-Rail Out Instrumentation Amplifier
INA333_1 制造商:TI 制造商全稱:Texas Instruments 功能描述:Micro-Power (50mA), Zero -Drift, Rail-to-Rail Out Instrumentation Amplifier
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*