參數(shù)資料
型號(hào)： MAX4208
廠商： Maxim Integrated Products, Inc.
元件分類： 運(yùn)動(dòng)控制電子
英文描述： Ultra-Low Offset/Drift, Precision Instrumentation Amplifiers with REF Buffer
中文描述： 超低失調(diào)/漂移、高精度儀表放大器，提供REF緩沖器
文件頁(yè)數(shù)： 15/17頁(yè)
文件大?。?/td> 263K
代理商： MAX4208
M
Ultra-Low Offset/Drift, Precision
Instrumentation Amplifiers with REF Buffer
______________________________________________________________________________________
15
The ultra-low V
OS
of the MAX4208/MAX4209 allows full-
scale V
SENSE
of only 10mV to 20mV for minimally inva-
sive current sensing using milliohm sense resistors to
get high accuracy. Previous methods used the internal
resistance of the inductor in the step-down DC-DC con-
verter to measure the current, but the accuracy was
only 20% to 30%. Using a full-scale V
SENSE
of 20mV, a
20μV max, V
OS
error term is less than 0.1% and
MAX4209H gain error is 0.25% max at 100x, so the
total accuracy is greatly improved. The 0 to 2V output
of MAX4209H can be sent to an ADC for calculation.
The adjustable gain of MAX4208, can be set to a gain
of 250x using 1k
Ω
and 249k
Ω
resistors, to scale up a
lower 10mV V
SENSE
voltage to a larger 2.5V output volt-
age for wider dynamic range as needed.
ASIC
IN+
IN-
REF
V
SS
V
DD
REFIN/MODE
1V AT 10A
ADC
ANTI-ALIASING
FILTER
0.002
Ω
+V
SENSE
-
MAX4209H
OUT
+3.3V
V
SENSE
= 10A x 0.002
Ω
= 20mV
POWER IN R
SENSE
= 10A x 20mV = 200mW
OUT = G x 20mV = 100 x 20mV = 2V
Figure 5. MAX4208/MAX4209 Used as Precision Current-Sense Amplifiers for Notebook Computers with V
SENSE
of 20mV
IN-
IN+
REFIN/MODE
REF
FB
MAX4208
R4
R3
V
DD
V
SS
C
FB
5V
OUT
REF
R2
FB
R1
G = 1 + R2
R1
BUFFER OUT =
V
DD
/2
V
DD
/2
Typical Application Circuit
相關(guān)PDF資料
PDF描述
MAX4209 Ultra-Low Offset/Drift, Precision Instrumentation Amplifiers with REF Buffer
MAX4215ESA High-Speed, Single-Supply, Gain of @, Closed-Loop, Rail-to-Rail Buffers with Enable
MAX4219EEE High-Speed, Single-Supply, Gain of @, Closed-Loop, Rail-to-Rail Buffers with Enable
MAX4217ESA High-Speed, Single-Supply, Gain of @, Closed-Loop, Rail-to-Rail Buffers with Enable
MAX4214 High-Speed, Single-Supply, Gain of @, Closed-Loop, Rail-to-Rail Buffers with Enable
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX4208AUA+ 功能描述:儀表放大器 Low Offset/Drift Instrumentation Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk
MAX4208AUA+T 功能描述:儀表放大器 Low Offset/Drift Instrumentation Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk
MAX4208EVKIT+ 功能描述:放大器 IC 開發(fā)工具 MAX4208 Eval Kit RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評(píng)估:IR4302 工作電源電壓:13 V to 23 V
MAX4209EVKIT+ 功能描述:放大器 IC 開發(fā)工具 MAX4209 Eval Kit RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評(píng)估:IR4302 工作電源電壓:13 V to 23 V
MAX4209HAUA+ 功能描述:儀表放大器 Low Offset/Drift Instrumentation Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*