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OPA861IDBVR 参数 Datasheet PDF下载

OPA861IDBVR图片预览
型号: OPA861IDBVR
PDF下载: 下载PDF文件 查看货源
内容描述: 宽带运算跨导放大器( OTA ) [Wide Bandwidth OPERATIONAL TRANSCONDUCTANCE AMPLIFIER (OTA)]
分类和应用: 放大器光电二极管
文件页数/大小: 28 页 / 603 K
品牌: TI [ TEXAS INSTRUMENTS ]
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OPA861  
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SBOS338AUGUST 2005  
Wide Bandwidth  
OPERATIONAL TRANSCONDUCTANCE  
AMPLIFIER (OTA)  
FEATURES  
DESCRIPTION  
Wide Bandwidth (80MHz, Open-Loop, G = +5)  
The OPA861 is a versatile monolithic component  
designed for wide-bandwidth systems, including high  
performance video, RF and IF circuitry. The OPA861  
is a wideband, bipolar operational transconductance  
amplifier (OTA).  
High Slew Rate (900V/µs)  
High Transconductance (95mA/V)  
External IQ-Control  
Low Quiescent Current (5.4mA)  
The OTA or voltage-controlled current source can be  
viewed as an ideal transistor. Like a transistor, it has  
three terminals—a high impedance input (base), a  
low-impedance input/output (emitter), and the current  
output (collector). The OPA861, however, is  
self-biased and bipolar. The output collector current is  
zero for a zero base-emitter voltage. AC inputs  
centered about zero produce an output current, which  
is bipolar and centered about zero. The  
transconductance of the OPA861 can be adjusted  
with an external resistor, allowing bandwidth, quiesc-  
ent current, and gain trade-offs to be optimized.  
APPLICATIONS  
Video/Broadcast Equipment  
Communications Equipment  
High-Speed Data Acquisition  
Wideband LED Drivers  
Control Loop Amplifiers  
Wideband Active Filters  
Line Drivers  
Used as a basic building block, the OPA861 sim-  
plifies the design of AGC amplifiers, LED driver  
circuits for fiber optic transmission, integrators for fast  
pulses, fast control loop amplifiers and control ampli-  
fiers for capacitive sensors and active filters. The  
OPA861 is available in SO-8 and SOT23-6 sur-  
face-mount packages.  
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80  
R
10MHz  
LowPass Filter  
C1  
R
20kHz  
LowPass Filter  
VIN  
VOUT  
C2  
1k  
10k  
100k  
1M  
10M  
100M  
1G  
Frequency (Hz)  
LowPass Negative Impedance Converter (NIC) Filter  
Frequency Response of 20kHz and 10MHz  
LowPass NIC Filters  
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.  
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 © 2005, Texas Instruments Incorporated  
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