- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄360865 > INA2141P Dual, Low Power, G = 10, 100 INSTRUMENTATION AMPLIFIER PDF資料下載
參數(shù)資料
| 型號： | INA2141P |
| 元件分類： | 測量放大器 |
| 英文描述： | Dual, Low Power, G = 10, 100 INSTRUMENTATION AMPLIFIER |
| 中文描述： | 雙通道，低功耗G \u003d 10，100款儀表放大器 |
| 文件頁數(shù)： | 9/10頁 |
| 文件大?。?/td> | 243K |
| 代理商： | INA2141P |
9
INA2141
OFFSET TRIMMING
The INA2141 is laser trimmed for low offset voltage and
offset voltage drift. Most applications require no external
offset adjustment. Figure 2 shows an optional circuit for
trimming the output offset voltage. The voltage applied to
Ref terminal is summed with the output. The op amp buffer
provides low impedance at the Ref terminal to preserve good
common-mode rejection.
INPUT BIAS CURRENT RETURN PATH
The input impedance of the INA2141 is extremely high—
approximately 10
10
. However, a path must be provided for
the input bias current of both inputs. This input bias current
is approximately
±
2nA. High input impedance means that
this input bias current changes very little with varying input
voltage.
Input circuitry must provide a path for this input bias current
for proper operation. Figure 3 shows various provisions for
an input bias current path. Without a bias current path, the
inputs will float to a potential which exceeds the common-
mode range of the INA2141 and the input amplifiers will
saturate.
If the differential source resistance is low, the bias current
return path can be connected to one input (see the thermo-
couple example in Figure 3). With higher source impedance,
using two equal resistors provides a balanced input with
possible advantages of lower input offset voltage due to bias
current and better high-frequency common-mode rejection.
INPUT COMMON-MODE RANGE
The linear input voltage range of the input circuitry of the
INA2141 is from approximately 1.4V below the positive
supply voltage to 1.7V above the negative supply. As a
differential input voltage causes the output voltage increase,
however, the linear input range will be limited by the output
voltage swing of amplifiers A
1
and A
2
. So the linear com-
FIGURE 2. Optional Trimming of Output Offset Voltage.
mon-mode input range is related to the output voltage of the
complete amplifier. This behavior also depends on supply
voltage—see performance curves “Input Common-Mode
Range vs Output Voltage”.
Input-overload can produce an output voltage that appears
normal. For example, if an input overload condition drives
both input amplifiers to their positive output swing limit, the
difference voltage measured by the output amplifier will be
near zero. The output of the INA2141 will be near 0V even
though both inputs are overloaded.
LOW VOLTAGE OPERATION
The INA2141 can be operated on power supplies as low as
±
2.25V. Performance remains excellent with power sup-
plies ranging from
±
2.25V to
±
18V. Most parameters vary
only slightly throughout this supply voltage range—see
typical performance curves. Operation at very low supply
voltage requires careful attention to assure that the input
voltages remain within their linear range. Voltage swing
requirements of internal nodes limit the input common-
mode range with low power supply voltage. Typical perfor-
mance curves, “Input Common-Mode Range vs Output
Voltage” show the range of linear operation for
±
15V,
±
5V,
and
±
2.5V supplies.
FIGURE 3. Providing an Input Common-Mode Current Path.
10k
OPA177
±10mV
Adjustment Range
100
(For other
channel)
100
100μA
1/2 REF200
100μA
1/2 REF200
V+
V–
INA2141
1/2
Ref
V
O
V
IN
–
V
IN
+
47k
47k
10k
Microphone,
Hydrophone
etc.
Thermocouple
Center-tap provides
bias current return.
INA2141
1/2
INA2141
1/2
INA2141
1/2
相關PDF資料 |
PDF描述 |
|---|---|
| INA2141PA | Dual, Low Power, G = 10, 100 INSTRUMENTATION AMPLIFIER |
| INA2141U | RES,SMD,750 OHM,5%,.1W,0805 |
| INA2141UA | Dual, Low Power, G = 10, 100 INSTRUMENTATION AMPLIFIER |
| INA2143U | High-Speed, Precision, G = 10 or G = 0.1 DIFFERENCE AMPLIFIERS |
| INA143 | High-Speed, Precision, G = 10 or G = 0.1 DIFFERENCE AMPLIFIERS |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| INA2141PA | 制造商:Rochester Electronics LLC 功能描述:DUAL LOW POWER INST. AMP - Bulk |
| INA2141U | 功能描述:差分放大器 Dual Low Power 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 安裝風格:SMD/SMT 封裝 / 箱體:WQFN-24 封裝:Reel |
| INA2141UA | 功能描述:差分放大器 Dual Low Power G = 10 100 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 安裝風格:SMD/SMT 封裝 / 箱體:WQFN-24 封裝:Reel |
| INA2141UA | 制造商:Texas Instruments 功能描述:AMP INST DUAL SMD SOIC16 2121 |
| INA2141UA/1K | 功能描述:差分放大器 Dual Low Power G = 10 100 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 安裝風格:SMD/SMT 封裝 / 箱體:WQFN-24 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復。