參數(shù)資料
型號: MAX4460ESA+
廠商: Maxim Integrated Products
文件頁數(shù): 6/20頁
文件大?。?/td> 0K
描述: IC INSTR AMP SGL R-R 8-SOIC
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 100
放大器類型: 儀表
電路數(shù): 1
輸出類型: 滿擺幅
轉(zhuǎn)換速率: 0.5 V/µs
增益帶寬積: 2.5MHz
電流 - 輸入偏壓: 1pA
電壓 - 輸入偏移: 50µV
電流 - 電源: 800µA
電流 - 輸出 / 通道: 150mA
電壓 - 電源,單路/雙路(±): 2.85 V ~ 5.25 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-SOIC
包裝: 管件
產(chǎn)品目錄頁面: 1390 (CN2011-ZH PDF)
MAX4460/MAX4461/MAX4462
SOT23, 3V/5V, Single-Supply, Rail-to-Rail
Instrumentation Amplifiers
14
______________________________________________________________________________________
Looking at this curve, one can immediately identify
three types of errors.
First, there is an obvious nonlinearity (curvature) when
this transfer function is compared to a straight line.
More deviation is measured as greater nonlinearity
error. This is explained in more detail below.
Second, even if there was no nonlinearity error, i.e., the
actual curve in Figure 4 was a straight line connecting
end points A and B, there exists an obvious slope devi-
ation from that of an ideal gain slope (drawn as the
“ideal” line in Figure 4). This rotational error (delta
slope) is a measure of how different the actual gain
(GA) is from the expected ideal gain (GI) and is called
gain error (GE) (see the equation below).
Third, even if the actual curve between points A and B
was a straight line (no nonlinearity error) and had the
same slope as the ideal gain line (no gain error), there
is still another error called the end-point offset error (OE
on vertical axis), since the line is not passing through
the origin.
Figure 5 is the same as Figure 4, but the ideal line (CD)
is shifted up to pass through point E (the Y intercept of
end-points line AB).
This is done to better visualize the rotational error (GE),
which is the difference between the slopes of end
points line AB and the shifted ideal line CD.
Mathematically:
GE (%) = 100 x (GA - GI) / GI
VOUT
VOUT2
VOUT1
VIN1
VIN
VIN2
IDEAL TRANSFER
FUNCTION (LINE)
0
Figure 3. Transfer Function of an Ideal Instrumentation
Amplifier (Straight Line Passing Through the Origin)
VOUT
ACTUAL CURVE
A
E
0
B
Z
END-POINT LINE
IDEAL LINE
VIN
Figure 4. Typical Transfer Function for a Real Instrumentation
Amplifier
VOUT
ACTUAL CURVE
END-POINT LINE
IDEAL LINE SHIFT
NL+
NL-
C
0
E
Z
B
D
A
VIN
SLOPE(CD) = IDEAL GAIN = GI
SLOPE(AB) = ACTUAL GAIN = GA
GAIN ERROR (%) = GE (%) = 100 X (GA - GI) / GI
OFFSET(END POINT) = OE
NL- = NL+
Figure 5. Typical Transfer Function for a Real Instrumentation
Amplifier (Ideal Line (CD) Is Shifted by the End-Points Offset
(OE) to Visualize Gain Error)
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