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| 型号： | MAX9938FEBS+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/14页 |
| 文件大小： | 0K |
| 描述： | IC AMP CURRENT SENSE 4-UCSP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 放大器类型： | 电流检测 |
| 电路数： | 1 |
| -3db带宽： | 60kHz |
| 电压 - 输入偏移： | 100µV |
| 电流 - 电源： | 1.1µA |
| 电压 - 电源，单路/双路(±)： | 1.6 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 4-WFBGA，CSPBGA |
| 供应商设备封装： | 4-UCSP（1.05x1.05） |
| 包装： | 带卷 (TR) |
The MAX9938 allows two methods of filtering to help
improve performance in the presence of input common-
mode voltage and input differential voltage transients.
Figure 1 shows a differential input filter.
The capacitor CIN between RS+ and RS- along with the
resistor RIN between the sense resistor and RS- helps
filter against input differential voltages and prevents
them from reaching the MAX9938.
The corner frequency of this filter is determined by the
choice of RIN, CIN, and the value of the input resis-
tance at RS- (R1). See Table 1 for R1 values at the dif-
ferent gain options.
The value of RIN should be chosen to minimize its
effect on the input offset voltage due to the bias current
at RS-. RIN x IBIAS contributes to the input voltage off-
set. IBIAS is typically 0.2μA.
Placing RIN at the RS- input does not affect the gain
error of the device because the gain is given by the
ratio between ROUT and R1 at RS+.
Figure 2 shows the input common-mode filter.
Again, the corner frequency of the filter is determined
by the choice of RIN, CIN and is affected by R1.
In this case RIN affects both gain error and input offset
voltage. RIN should be smaller than R1 so that it has
negligible effect on the device gain. If, for example, a fil-
ter with RIN = 10
Ω and CIN = 1μF is built, then depend-
ing upon the gain selection, the gain error is affected by
either 2.5% (G = 25V/V, R1 = 400
Ω) or 5% (G = 50V/V,
R1 = 200
Ω) or 10% (G = 100V/V, R1 = 100Ω) or 10%
(G = 200V/V, R1 = 100
Ω).
MAX9938
1A, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
8
_______________________________________________________________________________________
Figure 2. Input Common-Mode Filter
RSENSE
CIN
RIN
RS-
OUT
GND
RS+
MAX9938
LOAD
RSENSE
CIN
RIN
RS-
OUT
GND
RS+
MAX9938
LOAD
Figure 1. Differential Input Filter
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9938FELT+ | 制造商:Maxim Integrated Products 功能描述:1?A, 4-BUMP UCSP/SOT23, PRECISION CURRENT-SENSE AMPLIFIER - Rail/Tube |
| MAX9938FELT+T | 功能描述:电流灵敏放大器 1uA Bump Precision Current Sense Amp RoHS:否 制造商:Texas Instruments 通道数量: 共模抑制比（最小值）:110 dB 输入补偿电压:80 uV 电源电压-最大:5.5 V 电源电压-最小:2.7 V 电源电流:350 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| MAX9938FEUK+ | 制造商:Maxim Integrated Products 功能描述:1UA, 4-BUMP UCSP/SOT-23, PRECISION - Rail/Tube 制造商:Maxim Integrated Products 功能描述:PRECISION CURRENT-SENSE AMPLIFIER |
| MAX9938FEUK+T | 功能描述:电流灵敏放大器 1uA Bump Precision Current Sense Amp RoHS:否 制造商:Texas Instruments 通道数量: 共模抑制比（最小值）:110 dB 输入补偿电压:80 uV 电源电压-最大:5.5 V 电源电压-最小:2.7 V 电源电流:350 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| MAX9938HEBS+G45 | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
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