參數(shù)資料
型號(hào)： AD627BRZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 13/25頁(yè)
文件大?。?/td> 0K
描述： IC AMP INST R-R 25MA 8SOIC
產(chǎn)品培訓(xùn)模塊： Power Line Monitoring
Instrumentation Amplifiers Performance
標(biāo)準(zhǔn)包裝： 98
放大器類型： 儀表
電路數(shù)： 1
輸出類型： 滿擺幅
轉(zhuǎn)換速率： 0.06 V/µs
-3db帶寬： 80kHz
電流 - 輸入偏壓： 2nA
電壓 - 輸入偏移： 25µV
電流 - 電源： 60µA
電流 - 輸出 / 通道： 25mA
電壓 - 電源，單路/雙路(±)： 2.2 V ~ 36 V，±1.1 V ~ 18 V
工作溫度： -40°C ~ 85°C
安裝類型： 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： 管件
產(chǎn)品目錄頁(yè)面： 771 (CN2011-ZH PDF)
Data Sheet
AD627
Rev. E | Page 19 of 24
ERRORS DUE TO AC CMRR
In Table 9, the error due to common-mode rejection results
from the common-mode voltage from the bridge 2.5 V. The
ac error due to less than ideal common-mode rejection cannot
be calculated without knowing the size of the ac common-mode
voltage (usually interference from 50 Hz/60 Hz mains frequencies).
A mismatch of 0.1% between the four gain setting resistors
determines the low frequency CMRR of a two-op-amp
instrumentation amplifier. The plot in Figure 43 shows the
practical results of resistor mismatch at ambient temperature.
The CMRR of the circuit in Figure 42 (Gain = +11) was
measured using four resistors with a mismatch of nearly 0.1%
(R1 = 9999.5 , R2 = 999.76 , R3 = 1000.2 , R4 = 9997.7 ).
As expected, the CMRR at dc was measured at about 84 dB
(calculated value is 85 dB). However, as frequency increases,
CMRR quickly degrades. For example, a 200 mV p-p harmonic
of the mains frequency at 180 Hz would result in an output
voltage of about 800 V. To put this in context, a 12-bit data
acquisition system, with an input range of 0 V to 2.5 V, has an
LSB weighting of 610 V.
By contrast, the AD627 uses precision laser trimming of internal
resistors, along with patented CMR trimming, to yield a higher
dc CMRR and a wider bandwidth over which the CMRR is flat
VOUT
+5V
VIN–
VIN+
–5V
R1
9999.5
R2
999.76
R3
1000.2
R4
9997.7
1/2
OP296
A1
A2
1/2
OP296
00782-
040
Figure 42. 0.1% Resistor Mismatch Example
FREQUENCY (Hz)
CM
RR
(
d
B)
120
1
110
100
90
80
70
60
50
40
30
20
10
100
1k
10k
100k
00782-
041
Figure 43. CMRR over Frequency of Discrete In-Amp in Figure 42
GROUND RETURNS FOR INPUT BIAS CURRENTS
Input bias currents are dc currents that must flow to bias the
input transistors of an amplifier. They are usually transistor base
currents. When amplifying floating input sources, such as
transformers or ac-coupled sources, there must be a direct dc
path into each input so that the bias current can flow. Figure 44,
Figure 45, and Figure 46 show how to provide a bias current
path for the cases of, respectively, transformer coupling, a
thermocouple application, and capacitive ac-coupling.
In dc-coupled resistive bridge applications, providing this path
is generally not necessary because the bias current simply flows
from the bridge supply through the bridge and into the amplifier.
However, if the impedance that the two inputs see are large, and
differ by a large amount (>10 k), the offset current of the input
stage causes dc errors compatible with the input offset voltage of
the amplifier.
VOUT
TO POWER
SUPPLY
GROUND
RG
–VS
+VS
AD627
7
4
5
8
3
6
1
2
REFERENCE
+INPUT
–INPUT
LOAD
00782-
042
Figure 44. Ground Returns for Bias Currents with Transformer Coupled Inputs
VOUT
TO POWER
SUPPLY
GROUND
RG
–VS
+VS
AD627
7
4
5
8
3
6
1
2
REFERENCE
+INPUT
–INPUT
LOAD
00782-
043
Figure 45. Ground Returns for Bias Currents with Thermocouple Inputs
VOUT
TO POWER
SUPPLY
GROUND
RG
–VS
+VS
AD627
7
4
5
8
3
6
1
2
REFERENCE
+INPUT
–INPUT
100k
LOAD
00782-
044
Figure 46. Ground Returns for Bias Currents with AC-Coupled Inputs
相關(guān)PDF資料
PDF描述
929400-01-17 CONN HEADER .100 SNGL STR 17POS
AD847JRZ IC OPAMP GP 50MHZ LP 32MA 8SOIC
AD8513ARZ IC OPAMP JFET 8MHZ QUAD 14SOIC
929834-02-17 CONN HEADER .100 SNGL STR 17POS
AD8513ARUZ IC OPAMP JFET 8MHZ QUAD 14TSSOP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD627BRZ-R7 功能描述:IC AMP INST R-R 80MHZ DL 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR
AD627BRZ-RL 功能描述:IC AMP INST R-R 25MA 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:J-FET 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:13 V/µs 增益帶寬積:3MHz -3db帶寬:- 電流 - 輸入偏壓:65pA 電壓 - 輸入偏移:3000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-PDIP 包裝:管件
AD628 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual-Channel Audio Difference Amplifier
AD628_06 制造商:AD 制造商全稱:Analog Devices 功能描述:High Common-Mode Voltage, Programmable Gain Difference Amplifier
AD628_07 制造商:AD 制造商全稱:Analog Devices 功能描述:High Common-Mode Voltage, Programmable Gain Difference 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

*
*
*