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參數(shù)資料
| 型號(hào)： | INA148 |
| 元件分類： | 差分放大器 |
| 英文描述： | 【200V Common-Mode Voltage DIFFERENCE AMPLIFIER |
| 中文描述： | 【200伏共模電壓差分放大器 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 123K |
| 代理商： | INA148 |
9
INA148
FIGURE 2. Optional Offset Trim Voltage.
FIGURE 3. Preferred Offset Trim Circuit.
THE GAIN EQUATION
An internal on-chip resistor network sets the overall differ-
ential gain of the INA148 to precisely 1V/V. It’s output is
accordance with the equation:
V
OUT
= (V
IN
+
– V
IN
–
) + V
REF
(1)
COMMON-MODE RANGE
The 20:1 input resistor ratio of the INA148 provides an input
common-mode range that extends well beyond its power
supply rails.
The exact input voltage range depends on the amplifier’s
power-supply voltage and the voltage applied to the Ref
terminal (pin 1). Typical input voltage ranges at different
power supply voltages can be found in the applications
circuits section.
OFFSET TRIM
The INA148 is laser-trimmed for low offset voltage and
drift. Most applications will require no external offset ad-
justment.
Since a voltage applied to the reference (Ref) pin (pin 1) will
be summed directly into the amplifier’s output signal, this
technique can be used to null the amplifier’s input offset
voltage. Figure 2 shows an optional circuit for trimming the
offset voltage.
To maintain high common-mode rejection (CMR), the source
impedance of any signal applied to the Ref terminal should
be very low (
≤
5
).
A source impedance of only 10
at the Ref pin will reduce
the INA148’s CMR to approximately 74dB. High CMR can
be restored if a resistor is added in series with the amplifier’s
positive input terminal (pin 3). This resistor should be 19
times the source impedance that drives the Ref pin. For
example, if the Ref pin sees a source impedance of 10
, a
resistor of 190
should be added in series with pin 3.
1M
50k
52.6316k
50k
10k
10k
+15V
–15V
10
2.7778k
1M
190
V
IN
7
3
2
6
4
1
A1
INA148
–V
S
V
O
+
V
IN
–
+V
S
V
O
= (V
IN
– V
IN
) + V
REF
–
+
±
15mV Offset
Trim Range, RTI
V
REF
1M
50k
52.6316k
50k
2.7778k
1M
V
IN
7
3
2
6
4
1
A1
INA148
–15V
V
O
+
V
IN
–
+15V
±
15mV Offset
Trim Range, RTI
100k
100k
100
+15V
–15V
V
REF
OPA237
V
O
= (V
IN
– V
IN
) + V
REF
–
+
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| INA148UA | 【200V Common-Mode Voltage DIFFERENCE AMPLIFIER |
| INA154UA | High-Speed, Precision DIFFERENCE AMPLIFIER G = 1 |
| INA154 | High-Speed, Precision DIFFERENCE AMPLIFIER G = 1 |
| INA154U | High-Speed, Precision DIFFERENCE AMPLIFIER G = 1 |
| INA155 | Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| INA148-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:?±200-V COMMON-MODE VOLTAGE DIFFERENCE AMPLIFIER |
| INA148QDRQ1 | 功能描述:差分放大器 Auto Cat +-200V Com- Mode Vltg Diff Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 Channel 帶寬:2.4 GHz 可用增益調(diào)整:6 dB to 26 dB 輸入補(bǔ)償電壓: 共模抑制比（最小值）:- 40 dB 工作電源電壓:4.75 V to 5.25 V 電源電流:100 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WQFN-24 封裝:Reel |
| INA148UA | 功能描述:差分放大器 +-200V Common-Mode Voltage RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 Channel 帶寬:2.4 GHz 可用增益調(diào)整:6 dB to 26 dB 輸入補(bǔ)償電壓: 共模抑制比（最小值）:- 40 dB 工作電源電壓:4.75 V to 5.25 V 電源電流:100 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WQFN-24 封裝:Reel |
| INA148UA/2K5 | 功能描述:差分放大器 +-200V Common-Mode Voltage RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 Channel 帶寬:2.4 GHz 可用增益調(diào)整:6 dB to 26 dB 輸入補(bǔ)償電壓: 共模抑制比（最小值）:- 40 dB 工作電源電壓:4.75 V to 5.25 V 電源電流:100 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WQFN-24 封裝:Reel |
| INA148UA/2K5G4 | 功能描述:差分放大器 +-200V Common-Mode Voltage RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 Channel 帶寬:2.4 GHz 可用增益調(diào)整:6 dB to 26 dB 輸入補(bǔ)償電壓: 共模抑制比（最小值）:- 40 dB 工作電源電壓:4.75 V to 5.25 V 電源電流:100 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WQFN-24 封裝:Reel |
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