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| 型号： | MAX4197ESA |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/13页 |
| 文件大小： | 0K |
| 描述： | IC AMP INSTR PREC R-TO-R 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 放大器类型： | 仪表 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 0.06 V/µs |
| -3db带宽： | 3.1kHz |
| 电流 - 输入偏压： | 6nA |
| 电压 - 输入偏移： | 100µV |
| 电流 - 电源： | 93µA |
| 电流 - 输出 / 通道： | 4.5mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 7.5 V，±1.35 V ~ 3.75 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
MAX4194–MAX4197
Micropower, Single-Supply, Rail-to-Rail,
Precision Instrumentation Amplifiers
12
______________________________________________________________________________________
Power-Supply Bypassing and Layout
Good layout technique optimizes performance by
decreasing the amount of stray capacitance at the
instrumentation amplifier’s gain-setting pins. Excess
capacitance will produce peaking in the amplifier’s fre-
quency response. To decrease stray capacitance, min-
imize trace lengths by placing external components as
close to the instrumentation amplifier as possible. For
best performance, bypass each power supply to
ground with a separate 0.1F capacitor.
Transducer Applications
The MAX4194–MAX4197 instrumentation amplifiers can
be used in various signal-conditioning circuits for ther-
mocouples, PT100s, strain gauges (displacement sen-
sors), piezoresistive transducers (PRTs), flow sensors,
and bioelectrical applications. Figure 7 shows a simpli-
fied example of how to attach four strain gauges (two
identical two-element strain gauges) to the inputs of the
MAX4194. The bridge contains four resistors, two of
which increase and two of which decrease by the same
ratio.
With a fully balanced bridge, points A (IN+) and B (IN-)
see half the excitation voltage (VBRIDGE). The low
impedance (120
to 350) of the strain gauges, how-
ever, could cause significant voltage drop contributions
by the wires leading to the bridge, which would cause
excitation variations. Output voltage VOUT can be cal-
culated as follows:
VOUT = VAB G
where G = (1 + 50k
/ RG) is the gain of the instrumen-
tation amplifier.
Since VAB is directly proportional to the excitation, gain
errors may occur.
Figure 7. Strain Gauge Connection to the MAX4194
IN-
VEE
VCC
VAB = VIN+ - VIN-
VBRIDGE
R
RG
IN+
RG+
RG-
OUT
REFERENCE
P
REF
B
A
MAX144
ADC
R = 120
- 350
___________________Chip Information
TRANSISTOR COUNT: 432
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4197ESA+ | 功能描述:仪表放大器 uPower Single-Supply Rail-Rail Precision RoHS:否 制造商:Texas Instruments 通道数量: 输入补偿电压:150 V 可用增益调整: 最大输入电阻:10 kOhms 共模抑制比（最小值）:88 dB 工作电源电压:2.7 V to 36 V 电源电流:200 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:MSOP-8 封装:Bulk |
| MAX4197ESA+T | 功能描述:仪表放大器 uPower Single-Supply Rail-Rail Precision RoHS:否 制造商:Texas Instruments 通道数量: 输入补偿电压:150 V 可用增益调整: 最大输入电阻:10 kOhms 共模抑制比（最小值）:88 dB 工作电源电压:2.7 V to 36 V 电源电流:200 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:MSOP-8 封装:Bulk |
| MAX4197ESA-T | 功能描述:仪表放大器 uPower Single-Supply Rail-Rail Precision RoHS:否 制造商:Texas Instruments 通道数量: 输入补偿电压:150 V 可用增益调整: 最大输入电阻:10 kOhms 共模抑制比（最小值）:88 dB 工作电源电压:2.7 V to 36 V 电源电流:200 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:MSOP-8 封装:Bulk |
| MAX4198 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Micropower, Single-Supply, Rail-to-Rail Precision Differential Amplifiers |
| MAX4198_04 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Micropower, Single-Supply, Rail-to-Rail Precision Differential Amplifiers |
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