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參數(shù)資料
| 型號(hào)： | LMP8277MAX/NOPB |
| 廠商： | National Semiconductor |
| 文件頁數(shù)： | 2/13頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP PREC VOLT DIFF 8-SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 系列： | LMP® |
| 放大器類型： | 差分 |
| 電路數(shù)： | 1 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 0.7 V/µs |
| 增益帶寬積： | 80kHz |
| 電流 - 輸入偏壓： | 20pA |
| 電壓 - 輸入偏移： | 250µV |
| 電流 - 電源： | 1mA |
| 電壓 - 電源，單路/雙路(±)： | 4.75 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°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： | 帶卷 (TR) |
| 其它名稱： | LMP8277MAX |
14 RG
GAIN (NEW) =
RG - 100 k:
VS = 4.75V to 5.5V
OUT
LMP8277
+
-
A1
GND
+IN
-IN
A2
GAIN = 2
A1
A2
100 k:
GAIN = 7
PROPRIETARY
LEVEL - SHIFT
CIRCUITRY
RG
RG = (100 k:)
GAIN (NEW)
14 - GAIN (NEW)
14 RG
RG + 100 k:
GAIN (NEW) =
VS = 4.75V to 5.5V
OUT
LMP8277
+
-
A1
GND
+IN
-IN
A2
GAIN = 2
A1 A2
100 k:
GAIN = 7
PROPRIETARY
LEVEL - SHIFT
CIRCUITRY
RG
OBSOLETE
SNOSAK3G – DECEMBER 2004 – REVISED MARCH 2007
for the LMP8277, R1 = 100 k. Setting R1 = R2 and C1 = C2 results in a low pass filter with Q = 1. Since the
values of resistors are predetermined, the corner frequency of this implementation of the filter depends on the
capacitor values.
GAINS OTHER THAN 14
The LMP8277 has an internal gain of +14; however this gain can be modified. The signal path between the tow
amplifiers is available as external pins.
GAINS LESS THAN 14
shows the configuration used to reduce the LMP8277 gain.
Figure 23. Gains Less than 14
Where:
(7)
and
(8)
GAINS GREATER THAN 14
A higher gain can be achieved by using positive feedback on the second stage amplifier, A2, of the LMP8277.
Figure 24 shows the configuration:
Figure 24. Gains Greater Than 14
The total gain is given by:
(9)
Which can be rearranged to calculate RG:
10
Copyright 2004–2007, Texas Instruments Incorporated
Product Folder Links: LMP8277
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| LMP8278MMEVAL/NOPB | 制造商:Texas Instruments 功能描述:HIGH COMMON MODE, 14 X GAIN, PRECISION C - Boxed Product (Development Kits) 制造商:Texas Instruments 功能描述:BOARD EVAL FOR LMP8278 制造商:Texas Instruments 功能描述:High Common Mode, 14 x Gain, Precision C |
| LMP8278Q | 制造商:TI 制造商全稱:Texas Instruments 功能描述:High Common Mode, 14 x Gain, Precision Current Sensing Amplifier |
| LMP8278QMM/NOPB | 功能描述:電流靈敏放大器 Hi Common Md Prec Current Sensing 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 |
| LMP8278QMME/NOPB | 功能描述:電流靈敏放大器 Hi Common Md Prec Current Sensing 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 |
| LMP8278QMMX/NOPB | 功能描述:電流靈敏放大器 Hi Common Md Prec Current Sensing 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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