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THS4281

更新时间： 2024-09-29 08:49:03
品牌 Logo 应用领域
德州仪器 - TI 运算放大器输出元件输入元件
页数 文件大小 规格书
31页 1135K
描述
VERY LOW-POWER, HIGH-SPEED, RAIL-TO-RAIL INPUT AND OUTPUT VOLTAGE-FEEDBACK OPERATIONAL AMPLIFIER

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THS4281 数据手册

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THS4281  
www.ti.com  
SLOS432–APRIL 2004  
VERY LOW-POWER, HIGH-SPEED, RAIL-TO-RAIL INPUT AND OUTPUT  
VOLTAGE-FEEDBACK OPERATIONAL AMPLIFIER  
FEATURES  
DESCRIPTION  
•
Very Low Quiescent Current: 750 µA (at 5 V)  
Fabricated using the BiCom-II process, the THS4281  
is a low-power, rail-to-rail input and output volt-  
age-feedback operational amplifier designed to  
operate over a wide power supply range of 2.7-V to  
15-V single supply, and ±1.35-V to ±7.5-V dual  
supply. Consuming only 750 µA with a unity gain  
bandwidth of 90 MHz and a high 35-V/µs slew rate,  
the THS4281 allows portable or other power-sensitive  
applications to realize high performance with minimal  
power. To ensure long battery life in portable appli-  
cations, the quiescent current is trimmed to be less  
than 900 µA at 25°C, and 1 mA from –40°C to 85°C.  
•
Rail-to-Rail Input and Output:  
– Common-Mode Input Voltage Extends  
400 mV Beyond the Rails  
– Output Swings Within 150 mV From the  
Rails  
•
Wide -3 dB Bandwidth at 5 V:  
– 90-MHz @ Gain = +1, 40 MHz @ Gain = +2  
High Slew Rate: 35 V/µs  
•
•
Fast Settling Time (2-V Step):  
– 78 ns to 0.1%  
The THS4281 is a true single-supply amplifier with a  
specified common-mode input range of 400 mV  
beyond the rails. This allows for high-side current  
sensing applications without phase reversal con-  
cerns. Its output swings to within 40 mV from the rails  
with 10-kΩ loads, and 150 mV from the rails with  
1-kΩ loads.  
– 150 ns to 0.01%  
•
Low Distortion @ Gain = +2, VO = 2-Vpp, 5 V:  
– -91 dBc at 100 kHz, -67 dBc at 1 MHz  
Input Offset Voltage: 2.5 mV (Max at 25°C)  
Output Current >30 mA (10-Ω Load, 5 V)  
Low Voltage Noise of 12.5 nV/√Hz  
Supply Voltages: +2.7 V, 3 V, +5 V, ±5 V, +15 V  
Packages: SOT-23, MSOP, and SOIC  
•
•
•
•
•
The THS4281 has a good 0.1% settling time of 78 ns,  
and 0.01% settling time of 150 ns. The low THD of  
-87 dBc at 100 kHz, coupled with a maximum offset  
voltage of less than 2.5 mV, makes the THS4281 a  
good match for high-resolution ADCs sampling less  
than 2 MSPS.  
APPLICATIONS  
•
•
•
•
•
Portable/Battery-Powered Applications  
High Channel Count Systems  
ADC Buffer  
Active Filters  
Current Sensing  
The THS4281 is offered in a space-saving SOT-23-5  
package, a small MSOP-8 package, and the industry  
standard SOIC-8 package.  
470 pF  
V
BAT  
500 W  
2.5 kW  
V
= I  
RSENSE  
OUT  
I
RSENSE  
V
BAT  
V
BAT  
W
0.2  
100W  
−
500 W  
+IN  
ADS8320  
−IN  
+
THS4281  
10 nF  
Load  
470 pF  
2.5 kW  
V
BAT/2  
High-Side, Low Power Current-Sensing System  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
FilterPro is a trademark of Texas Instruments.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2004, Texas Instruments Incorporated  
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THS4281 替代型号

型号 品牌 替代类型 描述 数据表
OPA2835 TI

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