- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄2153 > LM7131ACMX (National Semiconductor)IC OP AMP TINY HS SNG SUPP 8SOIC PDF資料下載
參數(shù)資料
| 型號： | LM7131ACMX |
| 廠商： | National Semiconductor |
| 文件頁數(shù)： | 18/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OP AMP TINY HS SNG SUPP 8SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 放大器類型： | 電壓反饋 |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 150 V/µs |
| 增益帶寬積： | 70MHz |
| -3db帶寬： | 90MHz |
| 電流 - 輸入偏壓： | 20µA |
| 電壓 - 輸入偏移： | 20µV |
| 電流 - 電源： | 7.5mA |
| 電流 - 輸出 / 通道： | 65mA |
| 電壓 - 電源，單路/雙路(±)： | 2.7 V ~ 12 V，± 2.5 V ~ 6 V |
| 工作溫度： | 0°C ~ 70°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： | *LM7131ACMX |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當(dāng)前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
OBSOLETE
SNOS737C – SEPTEMBER 1999 – REVISED APRIL 2013
Use with 2.5V Virtual Ground Systems
with +5V Single Supply Power
Many analog systems which must work on a single +5V supply use a “virtual ground” - a reference voltage for
the signal processing which is usually between +5V and 0V. This virtual ground is usually halfway between the
top and bottom supply rails. This is usually +2.5V for +5V systems and +1.5V for +3V systems.
The LM7131 can be used in single supply/virtual ground systems driving loads referenced to 2.5V. The output
swing specifications in the data sheet show the tested voltage limits for driving a 150
Ω load to a virtual ground
supply for +3V and +5V. A look at the output swing specifications shows that for heavy loads like 150 ohms, the
output will swing as close as one diode drop (roughly, 0.7V) to the supply rail. This leaves a relatively wide range
for +5V systems and a somewhat narrow range for +3V systems. One way to increase this output range is to
have the output load referenced to ground—this will allow the output to swing lower. Another is to use higher
load impedances. The output swing specifications show typical numbers for swing with loads of 600
Ω to ground.
Note that these typical numbers are similar to those for a 150
Ω load. These typical numbers are an indication of
the maximum DC performance of the LM7131.
The sinking output of the LM7131 is somewhat lower than the amplifier's sourcing capability. This means that the
LM7131 will not drive as much current into a load tied to 2.5 V as it will drive into a load tied to 0V.
Good AC performance will require keeping the output further away from the supply rails. For a +5V supply and
relatively high impedance load (analog-to-digital converter input) the following are suggested as an initial starting
range for achieving high (> 60 dB) AC accuracy
Upper output level—
Approximately 0.8V to 1V below the positive (V+) rail.
Lower output level—
Approximately 200 mV–300 mV above the negative rail.
The LM7131 very useful in virtual ground systems as an output device for output loads which are referenced to
0V or the lower rail. It is also useful as a driver for capacitive loads, such as sample and hold circuits, and audio
analog to digital converters. If fast amplifiers with rail-to-rail output ranges are needed, please see the Texas
Instruments LM6142 datasheet.
D/A Output Amplifier
The LM7131 can be used as an output amplifier for fast digital-to-analog converters. When using the LM7131
with converters with an output voltage range which may exceed the differential input voltage limit of ±2V, it may
be necessary to add protection diodes to the inputs. See Figure 45. For high speed applications, it may be useful
to consider low capacitance schottky diodes. Additional feedback capacitance may be needed to control ringing
due to the additional input capacitance from the D/A and protection diodes. When used with current output D/As,
the input bias currents may produce a DC offset in the output. This offset may be canceled by a resistor between
the positive input and ground.
SPICE Macromodel
A SPICE macromodel of the LM7131 and many other Texas Instruments op amps is available at no charge from
your Texas Instruments representative.
Copyright 1999–2013, Texas Instruments Incorporated
25
Product Folder Links: LM7131
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMC6484AIN/NOPB | IC OP AMP QUAD CMOS R-R 14-DIP |
| LMC7101BYM5 TR | IC OPAMP STD 500KHZ SOT23-5 |
| LMH6619MAX/NOPB | IC AMP DUAL RRIO 130MHZ 8-SOIC |
| LMH6644MTX/NOPB | IC OP AMP R-R LP 3V 75MA 14TSSOP |
| LMP8270MAX/NOPB | IC AMP PREC VOLT DIFF 8-SOIC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM7131ACN | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:IC-HIGH SPEED OP AMP |
| LM7131BCM | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LM7131BCM5 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Tiny High Speed Single Supply Operational Amplifier |
| LM7131BCM5X | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LM7131BCMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Tiny High Speed Single Supply Operational Amplifier |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。