參數(shù)資料
型號(hào)： AD8552ARZ-REEL
廠商： ANALOG DEVICES INC
元件分類(lèi)： 運(yùn)動(dòng)控制電子
英文描述： Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifiers
中文描述： DUAL OP-AMP, 10 uV OFFSET-MAX, 1.5 MHz BAND WIDTH, PDSO8
封裝： ROHS COMPLIANT, MS-012AA, SOIC-8
文件頁(yè)數(shù)： 20/24頁(yè)
文件大?。?/td> 416K
代理商： AD8552ARZ-REEL
AD8551/AD8552/AD8554
APPLICATIONS
5 V PRECISION STRAIN GAGE CIRCUIT
The extremely low offset voltage of the AD8552 makes it an
ideal amplifier for any application requiring accuracy with high
gains, such as a weigh scale or strain gage. Figure 65 shows a
configuration for a single-supply, precision, strain gage
measurement system.
Rev. C | Page 20 of 24
A REF192 provides a 2.5 V precision reference voltage for A2.
The A2 amplifier boosts this voltage to provide a 4.0 V refer-
ence for the top of the strain gage resistor bridge. Q1 provides
the current drive for the 350 Ω bridge network. A1 is used to
amplify the output of the bridge with the full-scale output
voltage equal to
(
)
2
1
R
B
R
R
+
×
2
(17)
where
R
B
is the resistance of the load cell.
Using the values given in Figure 65, the output voltage linearly
varies from 0 V with no strain to 4.0 V under full strain.
NOTES
1. USE 0.1% TOLERANCE RESISTORS.
Figure 65. A 5 V Precision Strain Gage Amplifier
AD8552-A
R
4
100
AD8552-B
REF192
5V
2.5V
6
4
3
2
4.0V
A2
A1
V
OUT
0V TO 4.0V
40mV
FULL-SCALE
Q1
2N2222
OR
EQUIVALENT
350
LOAD
CELL
1k
12.0k
20k
R
1
17.4k
R
2
100
R
3
17.4k
0
3 V INSTRUMENTATION AMPLIFIER
The high common-mode rejection, high open-loop gain, and
operation down to 3 V of supply voltage makes the AD855x an
excellent choice of op amp for discrete single-supply instrumen-
tation amplifiers. The common-mode rejection ratio of the
AD855x is greater than 120 dB, but the CMRR of the system is
also a function of the external resistor tolerances. The gain of
the difference amplifier shown in Figure 66 is given as
+
+
=
1
2
2
1
4
3
4
OUT
V
R
R
V
R
R
R
R
R
V
2
1
1
(18)
V2
V1
R
1
R
2
V
OUT
AD8551/
AD8552/
AD8554
R
3
R
4
IFR
4
R
3
R
2
R
1
R
2
R
1
=
, THEN V
OUT
=
× (V1 – V2)
0
Figure 66. Using the AD855x as a Difference Amplifier
In an ideal difference amplifier, the ratio of the resistors are set
exactly equal to
R
R
3
4
1
2
V
R
R
A
=
=
(19)
Which sets the output voltage of the system to
V
OUT
=
A
V
(
V1
V2
)
(20)
Due to finite component tolerance, the ratio between the four
resistors is not exactly equal, and any mismatch results in a
reduction of common-mode rejection from the system.
Referring to Figure 66, the exact common-mode rejection ratio
can be expressed as
R
R
R
R
R
CMRR
2
2
3
2
4
1
3
2
4
R
2
4
1
R
R
R
R
2
+
+
=
(21)
In the three-op amp, instrumentation amplifier configuration
shown in Figure 67, the output difference amplifier is set to
unity gain with all four resistors equal in value. If the tolerance
of the resistors used in the circuit is given as δ, the worst-case
CMRR of the instrumentation amplifier is
1
=
δ
CMRR
MIN
2
(22)
V
OUT
= 1 +
2R
R
G
(V1 – V2)
R
R
R
R
AD8554-C
V2
R
R
V1
AD8554-B
AD8554-A
R
TRIM
R
G
V
OUT
0
Figure 67. A Discrete Instrumentation Amplifier Configuration
Consequently, using 1% tolerance resistors results in a worst-
case system CMRR of 0.02, or 34 dB. Therefore, either high
precision resistors or an additional trimming resistor, as shown
in Figure 67, should be used to achieve high common-mode
rejection. The value of this trimming resistor should be equal
to the value of R multiplied by its tolerance. For example, using
10 kΩ resistors with 1% tolerance requires a series trimming
resistor equal to 100 Ω.
相關(guān)PDF資料
PDF描述
AD8552ARZ-REEL7 Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifiers
AD8554AR-REEL Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifiers
AD8554AR-REEL7 Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifiers
AD8554ARU-REEL Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifiers
AD8554ARUZ Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifiers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD8552ARZ-REEL7 功能描述:IC OPAMP CHOPPER R-R DUAL 8SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:LinCMOS™ 放大器類(lèi)型:通用 電路數(shù):4 輸出類(lèi)型:- 轉(zhuǎn)換速率:0.05 V/µs 增益帶寬積:110kHz -3db帶寬:- 電流 - 輸入偏壓:0.7pA 電壓 - 輸入偏移:210µV 電流 - 電源:57µA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):3 V ~ 16 V，±1.5 V ~ 8 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SOIC 包裝:管件 產(chǎn)品目錄頁(yè)面:865 (CN2011-ZH PDF) 其它名稱(chēng):296-1834296-1834-5
AD8553 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Wide Supply Range, Micropower,
AD85531 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:10 MHz, 20 V/レs, G = 1, 10, 100, 1000 i CMOS㈢ Programmable Gain Instrumentation Amplifier
AD8553ARMZ 功能描述:IC AMP INST R-R 1KHZ PREC 10MSOP RoHS:是 類(lèi)別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 產(chǎn)品培訓(xùn)模塊:Differential Circuit Design Techniques for Communication Applications 標(biāo)準(zhǔn)包裝:1 系列:- 放大器類(lèi)型:RF/IF 差分 電路數(shù):1 輸出類(lèi)型:差分 轉(zhuǎn)換速率:9800 V/µs 增益帶寬積:- -3db帶寬:2.9GHz 電流 - 輸入偏壓:3µA 電壓 - 輸入偏移:- 電流 - 電源:40mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):3 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:16-VQFN 裸露焊盤(pán)，CSP 供應(yīng)商設(shè)備封裝:16-LFCSP-VQ 包裝:剪切帶 (CT) 產(chǎn)品目錄頁(yè)面:551 (CN2011-ZH PDF) 其它名稱(chēng):ADL5561ACPZ-R7CT
AD8553ARMZ-R2 功能描述:IC AMP INST R-R 1KHZ PREC 10MSOP RoHS:是 類(lèi)別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類(lèi)型:通用 電路數(shù):1 輸出類(lèi)型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SO 包裝:帶卷 (TR)
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

*
*
*