參數(shù)資料
型號(hào): MAX4208AUA+
廠商: Maxim Integrated Products
文件頁數(shù): 7/17頁
文件大小: 0K
描述: IC INSTRUMENT AMP PREC 8-UMAX
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 50
放大器類型: 儀表
電路數(shù): 1
輸出類型: 滿擺幅
轉(zhuǎn)換速率: 0.08 V/µs
增益帶寬積: 750kHz
電流 - 輸入偏壓: 1pA
電壓 - 輸入偏移: 3µV
電流 - 電源: 1.4mA
電流 - 輸出 / 通道: 25mA
電壓 - 電源,單路/雙路(±): 2.85 V ~ 5.5 V,±1.425 V ~ 2.25 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 8-TSSOP,8-MSOP(0.118",3.00mm 寬)
供應(yīng)商設(shè)備封裝: 8-uMAX
包裝: 管件
產(chǎn)品目錄頁面: 1388 (CN2011-ZH PDF)
MAX4208/MAX4209
Ultra-Low Offset/Drift, Precision
Instrumentation Amplifiers with REF Buffer
______________________________________________________________________________________
15
The ultra-low VOS of the MAX4208/MAX4209 allows full-
scale VSENSE 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 VSENSE of 20mV, a
20V max, VOS 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 249kΩ resistors, to scale up a
lower 10mV VSENSE voltage to a larger 2.5V output volt-
age for wider dynamic range as needed.
ASIC
IN+
IN-
REF
VSS
VDD
REFIN/MODE
1V AT 10A
ADC
ANTI-ALIASING
FILTER
0.002
Ω
+VSENSE-
MAX4209H
OUT
+3.3V
VSENSE = 10A x 0.002
Ω = 20mV
POWER IN RSENSE = 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 VSENSE of 20mV
IN-
IN+
REFIN/MODE
REF
FB
MAX4208
R4
R3
VDD
VSS
CFB
5V
OUT
REF
R2
FB
R1
G = 1 + R2
R1
BUFFER OUT =
VDD/2
Typical Application Circuit
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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