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OPA846

更新时间: 2024-11-22 22:50:47
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德州仪器 - TI 运算放大器
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23页 388K
描述
Wideband, Low-Noise, Voltage-Feedback OPERATIONAL AMPLIFIER

OPA846 数据手册

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OPA846  
OPA846  
O
P
A
8
4
6
SBOS250C – JULY 2002 – REVISED MAY 2003  
Wideband, Low-Noise, Voltage-Feedback  
OPERATIONAL AMPLIFIER  
FEATURES  
APPLICATIONS  
HIGH BANDWIDTH: 400MHz (G = +10)  
HIGH DYNAMIC RANGE ADC PREAMPS  
LOW-NOISE, WIDEBAND, TRANSIMPEDANCE  
AMPLIFIERS  
LOW INPUT VOLTAGE NOISE: 1.2nV/  
Hz  
VERY LOW DISTORTION: –100dBc (5MHz)  
HIGH SLEW RATE: 625V/µs  
WIDEBAND, HIGH GAIN AMPLIFIERS  
LOW-NOISE DIFFERENTIAL RECEIVERS  
VDSL LINE RECEIVERS  
ULTRASOUND CHANNEL AMPLIFIERS  
SECURITY SENSOR FRONT ENDS  
UPGRADE FOR THE OPA686, CLC425, AND  
LMH6624  
HIGH DC ACCURACY: VIO ±150µV  
LOW SUPPLY CURRENT: 12.6mA  
HIGH GAIN BANDWIDTH PRODUCT: 1750MHz  
STABLE FOR GAINS 7  
DESCRIPTION  
The OPA846 combines very high gain bandwidth and large  
signal performance with very low input voltage noise, while  
dissipating a low 12.6mA supply current. The classical differ-  
ential input stage, along with two stages of forward gain and  
a high power output stage, combine to make the OPA846 an  
exceptionally low distortion amplifier with excellent DC accu-  
racy and output drive. The voltage-feedback architecture  
allows all standard op amp applications to be implemented  
with very high performance.  
A new external compensation technique can be used to give  
a very flat frequency response below the minimum stable  
gain for the OPA846, further improving its already excep-  
tional distortion performance. Using this compensation makes  
the OPA846 one of the premier 12- to 16-bit Analog-to-Digital  
(A/D) converter input drivers. The supply current for the  
OPA846 is precisely trimmed to 12.6mA at +25°C. This,  
along with carefully defined supply current tempco in the  
input and output stages, combine to provide exceptional  
performance over the full specified temperature range.  
The combination of low input voltage and current noise,  
along with a 1.75GHz gain bandwidth product, make the  
OPA846 an ideal amplifier for wideband transimpedance  
stages. As a voltage gain stage, the OPA846 is optimized for  
a flat response at a gain of +10 and is stable down to a gain  
of +7.  
OPA846 RELATED PRODUCTS  
INPUT NOISE  
GAIN BANDWIDTH  
SINGLES  
VOLTAGE (nV/Hz  
)
PRODUCT (MHz)  
OPA842  
OPA843  
OPA847  
2.4  
2.0  
200  
800  
0.85  
3900  
+5V  
WIDEBAND TRANSIMPEDANCE  
Power-supply  
100  
95  
90  
85  
80  
75  
70  
65  
60  
decoupling not shown.  
20 log(50k) = 94dBΩ  
100pF  
0.1µF  
50kΩ  
VO  
OPA846  
IS  
50kΩ  
5V  
λ
10pF  
Photodiode  
0.2pF  
VB  
High Gain, 20MHz Transimpedance Amplifier  
0.1  
1
10  
Frequency (MHz)  
100  
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.  
Copyright © 2002-2003, Texas Instruments Incorporated  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
www.ti.com  

OPA846 替代型号

型号 品牌 替代类型 描述 数据表
OPA843 TI

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