參數(shù)資料
型號： XTR106PA
元件分類： 運(yùn)動控制電子
英文描述： A/D Converter (A-D) IC; Resolution (Bits):20; Sample Rate:100SPS; Input Channels Per ADC:1; Input Channel Type:Differential; Data Interface:Serial; Package/Case:8-SOIC; Interface Type:Serial; Leaded Process Compatible:No RoHS Compliant: Yes
中文描述： 的4 - 20mA的電橋激勵和線性電流變送器
文件頁數(shù)： 11/15頁
文件大?。?/td> 272K
代理商： XTR106PA
11
XTR106
R
LIN
=
(9905
) (4) (–0.025)
1– (2) (–0.025)
=
943
R
Y
15k
R
X
100k
I
RET
V
REG
Lin
Polarity
6
12
1
Open R
X
for negative bridge nonlinearity
Open R
Y
for positive bridge nonlinearity
XTR106
FIGURE 3. Connections and Equations to Correct Positive and Negative Bridge Nonlinearity.
Figure 4, but not peaking exactly at mid-scale can be
substantially improved. A sensor with a “S-shaped”
nonlinearity curve (equal positive and negative nonlinearity)
cannot be improved with the XTR106’s correction circuitry.
The value of R
LIN
is chosen according to Equation 4 shown
in Figure 3. R
LIN
is dependent on a linearization factor,
K
LIN
, which differs for the 2.5V reference and 5V reference.
The sensor’s nonlinearity term, B (relative to full scale), is
positive or negative depending on the direction of the bow.
A maximum
±
5% non-linearity can be corrected when the
5V reference is used. Sensor nonlinearity of +5%/–2.5% can
be corrected with 2.5V excitation. The trim circuit shown in
Figure 3d can be used for bridges with unknown bridge
nonlinearity polarity.
Gain is affected by the varying excitation voltage used to
correct bridge nonlinearity. The corrected value of the gain
resistor is calculated from Equation 5 given in Figure 3.
1
11
14
5
5V
4
3
2
R
G
XTR106
13
V
REF
2.5
V
REG
6
R
2
R
1
R
LIN
I
RET
Lin
Polarity
12
V
REF
5
+
–
+
–
1
11
14
5
2.5V
4
3
2
R
G
XTR106
13
V
REG
6
R
2
R
1
R
LIN
I
RET
Lin
Polarity
12
V
REF
2.5
V
REF
5
+
–
+
–
1
11
14
5
5V
4
3
2
R
G
XTR106
13
V
REF
2.5
V
REG
6
R
2
R
1
R
LIN
I
RET
Lin
Polarity
12
V
REF
5
+
–
+
–
3a.
Connection for Positive Bridge Nonlinearity, V
REF
= 5V
3b.
Connection for Negative Bridge Nonlinearity, V
REF
= 2.5V
3c.
Connection if no linearity correction is desired, V
REF
= 5V
R
LIN
=
K
LIN
4B
1– 2B
R
G
=
V
FS
400
μ
A
1
+
2B
1– 2B
V
REF(Adj)
=
V
REF(Initial)
1
+
2B
1– 2B
EQUATIONS
Linearization Resistor:
(4)
Gain-Set Resistor:
(5)
Adjusted Excitation Voltage at Full-Scale Output:
(6)
where, K
LIN
is the linearization factor (in
)
K
LIN
= 9905
for the 2.5V reference
K
LIN
= 6645
for the 5V reference
B is the sensor nonlinearity relative to V
FS
(for –2.5% nonlinearity, B = –0.025)
V
FS
is the full-scale bridge output without
linearization (in V)
Example:
Calculate R
and the resulting R
for a bridge sensor with
2.5% downward bow nonlinearity relative to V
FS
and determine
if the input common-mode range is valid.
V
REF
= 2.5V and V
FS
= 50mV
For a 2.5% downward bow, B = –0.025
(Lin Polarity pin connected to V
REG
)
For V
REF
= 2.5V, K
LIN
= 9905
which falls within the 1.1V to 3.5V input common-mode range.
(in
)
(in
)
(in V)
3d.
On-Board Resistor Circuit for Unknown Bridge Nonlinearity Polarity
R
G
=
0.05V
400
μ
A
1
+
(2) (–0.025)
1– (2) (–0.025)
=
113
V
CM
=
V
REF(Adj)
2
=
1
2
2.5V
1
+
(2) (–0.025)
1– (2) (–0.025)
=
1.13V
相關(guān)PDF資料
PDF描述
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XTR106UA A/D Converter (A-D) IC; Resolution (Bits):16; ADC Sample Rate:60SPS; Input Channels Per ADC:1; Input Channel Type:Differential Inputs; DNL +/-:0.5LSB; Data Interface:Serial, 3/4/5-Wire; Package/Case:24-SOIC
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XTR106PA 制造商:Texas Instruments 功能描述:Transceiver IC
XTR106PAG4 功能描述:電流靈敏放大器 4-20mA Crnt Trnsmtr w/Bridger Exc & Lin RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補(bǔ)償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel
XTR106PG4 功能描述:電流靈敏放大器 4-20mA Crnt Trnsmtr w/Bridger Exc & Lin RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補(bǔ)償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel
XTR106U 功能描述:電流靈敏放大器 4-20mA Crnt Trnsmtr w/Bridger Exc & Lin RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補(bǔ)償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel
XTR106U 制造商:Texas Instruments 功能描述:CURRENT LOOP TRANSMITTER SOIC14
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