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參數(shù)資料
| 型號： | MAX9938TEBS+TG45 |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 13/14頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP CURRENT SENSE 4UCSP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 放大器類型： | 電流檢測 |
| 電路數(shù)： | 1 |
| -3db帶寬： | 125kHz |
| 電壓 - 輸入偏移： | 100µV |
| 電流 - 電源： | 1.1µA |
| 電壓 - 電源，單路/雙路(±)： | 1.6 V ~ 28 V |
| 工作溫度： | -45°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 4-WFBGA，CSPBGA |
| 供應(yīng)商設(shè)備封裝： | 4-UCSP（1.05x1.05） |
| 包裝： | 帶卷 (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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9938TEUK+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX9938TEUK+T | 功能描述:電流靈敏放大器 1uA Bump Precision Current Sense Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補(bǔ)償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| MAX9938WEBS+G45 | 制造商:Maxim Integrated Products 功能描述:1?A, 4-BUMP UCSP/SOT23, PRECISION CURRENT-SENSE AMPLIFIER - Rail/Tube |
| MAX9938WEBS+T | 功能描述:電流靈敏放大器 1 A 4-Bump UCSP/SOT23 Precision Current-Sense Amplifier RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補(bǔ)償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| MAX9938WEBS+TG45 | 功能描述:電流靈敏放大器 Precision 1uA Current Sense Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補(bǔ)償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
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