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參數(shù)資料
| 型號： | XTR106P |
| 元件分類： | 運動控制電子 |
| 英文描述： | A/D Converter (A-D) IC; Resolution (Bits):16; Sample Rate:100SPS; Input Channels Per ADC:1; Input Channel Type:Differential; Data Interface:Serial; Package/Case:8-SOIC; Leaded Process Compatible:No; No. of Bits:18 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)： | 12/15頁 |
| 文件大小： | 272K |
| 代理商： | XTR106P |
12
XTR106
NONLINEARITY vs STIMULUS
0
3
2
1
0
–1
–2
–3
Normalized Stimulus
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
N
Negative Nonlinearity
B = –0.019
Positive Nonlinearity
B = +0.025
When using linearity correction, care should be taken to
insure that the sensor’s output common-mode voltage re-
mains within the XTR106’s allowable input range of 1.1V to
3.5V. Equation 6 in Figure 3 can be used to calculate the
XTR106’s new excitation voltage. The common-mode volt-
age of the bridge output is simply half this value if no
common-mode resistor is used (refer to the example in
Figure 3). Exceeding the common-mode range may yield
unpredicatable results.
For high precision applications (errors < 1%), a two-step
calibration process can be employed. First, the nonlinearity
of the sensor bridge is measured with the initial gain resistor
and R
LIN
= 0 (R
LIN
pin connected directly to V
REG
). Using
the resulting sensor nonlinearity, B, values for R
G
and R
LIN
are calculated using Equations 4 and 5 from Figure 3. A
second calibration measurement is then taken to adjust R
G
to
account for the offsets and mismatches in the linearization.
UNDER-SCALE CURRENT
The total current being drawn from the V
REF
and V
REG
voltage sources, as well as temperature, affect the XTR106’s
under-scale current value (see the Typical Performance
Curve, “Under-Scale Current vs I
REF
+ I
REG
). This should be
considered when choosing the bridge resistance and excita-
tion voltage, especially for transducers operating over a
wide temperature range (see the Typical Performance Curve,
“Under-Scale Current vs Temperature”).
LOW IMPEDANCE BRIDGES
The XTR106’s two available excitation voltages (2.5V and
5V) allow the use of a wide variety of bridge values. Bridge
impedances as low as 1k
can be used without any addi-
tional circuitry. Lower impedance bridges can be used with
the XTR106 by adding a series resistance to limit excitation
current to
≤
2.5mA (Figure 5). Resistance should be added
FIGURE 5. 350
Bridge with x50 Preamplifier.
BRIDGE TRANSDUCER TRANSFER FUNCTION
WITH PARABOLIC NONLINEARITY
0
10
9
8
7
6
5
4
3
2
1
0
Normalized Stimulus
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
B
Positive Nonlinearity
B = +0.025
B = –0.019
Negative Nonlinearity
Linear Response
FIGURE 4. Parabolic Nonlinearity.
1
14
13
5
3
2
XTR106
12
6
R
G
R
G
V
–
IN
V
+
IN
V+
I
O
I
RET
E
B
8
7
0.01μF
1N4148
9
10
4
11
R
LIN
Lin
Polarity
R
G
125
I
O
= 4-20mA
1/2
OPA2277
1/2
OPA2277
5V
V
REF
2.5
V
REG
V
REF
5
350
412
10k
10k
1k
3.4k
3.4k
I
REG
≈
1.6mA
700μA at 5V
I
TOTAL
= 0.7mA + 1.6mA
≤
2.5mA
Shown connected to correct positive
bridge nonlinearity. For negative bridge
nonlinearity, see Figure 3b.
Bridge excitation
voltage = 0.245V
Approx. x50
amplifier
相關PDF資料 |
PDF描述 |
|---|---|
| XTR106PA | 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 |
| XTR106U | A/D Converter (A-D) IC; Resolution (Bits):16; Sample Rate:60SPS; Input Channels Per ADC:1; Input Channel Type:Differential; Data Interface:Serial, 3/4/5-Wire; Package/Case:; DNL +/-:0.5LSB; Interface Type:Serial RoHS Compliant: No |
| 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 |
| XTR108 | 4-20mA, TWO-WIRE TRANSMITTER Smart Programmable with Signal Conditioning |
| XTR108EA | 4-20mA, TWO-WIRE TRANSMITTER Smart Programmable with Signal Conditioning |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| XTR106PA | 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
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