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參數(shù)資料
| 型號： | MAX4195ESA |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 13/13頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP INSTR PREC R-TO-R 8-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 放大器類型： | 儀表 |
| 電路數(shù)： | 1 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 0.06 V/µs |
| -3db帶寬： | 220kHz |
| 電流 - 輸入偏壓： | 6nA |
| 電壓 - 輸入偏移： | 100µV |
| 電流 - 電源： | 93µA |
| 電流 - 輸出 / 通道： | 4.5mA |
| 電壓 - 電源，單路/雙路(±)： | 2.7 V ~ 7.5 V，±1.35 V ~ 3.75 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 管件 |
MAX4194–MAX4197
Micropower, Single-Supply, Rail-to-Rail,
Precision Instrumentation Amplifiers
_______________________________________________________________________________________
9
Detailed Description
Input Stage
The MAX4194–MAX4197 family of low-power instru-
mentation amplifiers implements a three-amplifier topol-
ogy (Figure 1). The input stage is composed of two
operational amplifiers that together provide a fixed-gain
differential and a unity common-mode gain. The output
stage is a conventional differential amplifier that pro-
vides an overall common-mode rejection of 115dB (G =
+10V/V). The MAX4194’s gain can be externally set
between +1V/V and +10,000V/V (Table 1). The
MAX4195/MAX4196/MAX4197 have on-chip gain-set-
ting resistors (Figure 2), and their gains are fixed at
+1V/V, +10V/V, and +100V/V, respectively.
Input Voltage Range
and Detailed Operation
The common-mode input range for all of these ampli-
fiers is VEE - 0.2V to VCC - 1.1V. Ideally, the instrumen-
tation amplifier (Figure 3) responds only to a differential
voltage applied to its inputs, IN+ and IN-. If both inputs
are at the same voltage, the output is VREF. A differen-
tial voltage at IN+ (VIN+) and IN- (VIN-) develops an
identical voltage across the gain-setting resistor, caus-
ing a current (IG) to flow. This current also flows
through the feedback resistors of the two input ampli-
fiers A1 and A2, generating a differential voltage of:
VOUT2 - VOUT1 = IG (R1 + RG + R1)
where VOUT1 and VOUT2 are the output voltages of A1
and A2, RG is the gain-setting resistor (internal or exter-
nal to the part), and R1 is the feedback resistor of the
input amplifiers.
IG is determined by the following equation:
IG = (VIN+ - VIN-) / RG
The output voltage (VOUT) for the instrumentation
amplifier is expressed in the following equation:
VOUT = (VIN+ - VIN-) [(2 R1) / RG] + 1
The common-mode input range is a function of the
amplifier’s output voltage and the supply voltage. With
a power supply of VCC, the largest output signal swing
can be obtained with REF tied to VCC/2. This results in
an output voltage swing of ±VCC/2. An output voltage
swing less than full-scale increases the common-mode
input range.
R1*
R2*
VIN-
REF
OUT
RG**
IG
VIN+
VOUT2
VOUT1
VOUT2 - VOUT1
VIN+ - VIN-
A1
A2
A3
VOUT = (VIN+ - VIN-)
(1+ )
2R1
RG
* R1 = R2 = 25k
** RG = INTERNAL TO MAX4195/MAX4196/MAX4197
RG = EXTERNAL TO MAX4194
Figure 3. Instrumentation Amplifier Configuration
25k
25k
25k
25k
25k
25k
IN-
RG-
OUT
REF
VEE
VCC
IN+
RG+
MAX4194
Figure 1. MAX4194 Simplified Block Diagram
25k
25k
25k
25k
25k
25k
IN-
SHDN
OUT
REF
VCC
VEE
FB
RG
IN+
MAX4195
MAX4196
MAX4197
Figure 2. MAX4195/MAX4196/MAX4197 Simplified Block
Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4195ESA+ | 功能描述:儀表放大器 uPower Single-Supply Rail-Rail Precision 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 |
| MAX4195ESA+T | 功能描述:儀表放大器 uPower Single-Supply Rail-Rail Precision 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 |
| MAX4195ESA-T | 功能描述:儀表放大器 uPower Single-Supply Rail-Rail Precision 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 |
| MAX4196 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Micropower, Single-Supply, Rail-to-Rail, Precision Instrumentation Amplifiers |
| MAX4196ESA | 功能描述:儀表放大器 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 |
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