Image OPA847
型号: OPA847
厂商: Texas Instruments Texas Instruments
标准:
分类: 半导体
描述: wideband, ultra-low noise,voltage feedback operational amplifier with shutdown 6-sot-23 -40 to 85
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OPA847的详细信息

Vs(Min)(V) : 10
Operating Temperature Range(C) : -40 to 85
Offset Voltage Drift (+/-)(Max)(uV/Degrees Celsius) : 1.5
Package Group : SOIC,SOT-23
Rating : Catalog
Settling Time (0.1%)(Typ)(ns) : 20
Acl, min stable gain(V/V) : 12
2nd Harmonic(dBc) : 105
Vs(Max)(V) : 12
3rd Harmonic(dBc) : 110
Slew Rate(Typ)(V/us) : 950
Iq per channel(Max)(mA) : 18.9
Number of Channels(#) : 1
Io(Typ)(mA) : 75
@ MHz : 5
Vos(Max)(mV) : 0.5
Approx. Price (US$) : 2.17 | 1ku
Iib(Max)(nA) : 42000
Architecture : Voltage Feedback
BW @ Acl(MHz) : 600
Vn at Flatband(Typ)(nV/rtHz) : 0.85
GBW(Typ)(MHz) : 3900
Estimated Footprint(mm<:
sup>:
2<:
/sup>:
) : [pf]6SOT-23[/pf]
OPA847  
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www.ti.com  
SBOS251E – JULY 2002 – REVISED DECEMBER 2008  
Wideband, Ultra-Low Noise, Voltage-Feedback  
OPERATIONAL AMPLIFIER with Shutdown  
DESCRIPTION  
FEATURES  
The OPA847 combines very high gain bandwidth and large  
signal performance with an ultra-low input noise voltage  
(0.85nV/Hz) while using only 18mA supply current. Where  
power saving is critical, the OPA847 also includes an op-  
tional power shutdown pin that, when pulled low, disables the  
amplifier and decreases the supply current to < 1% of the  
powered-up value. This optional feature may be left discon-  
nected to ensure normal amplifier operation when no power-  
down is required.  
HIGH GAIN BANDWIDTH: 3.9GHz  
LOW INPUT VOLTAGE NOISE: 0.85nV/  
Hz  
VERY LOW DISTORTION: –105dBc (5MHz)  
HIGH SLEW RATE: 950V/µs  
HIGH DC ACCURACY: VIO < ±100µV  
LOW SUPPLY CURRENT: 18.1mA  
LOW SHUTDOWN POWER: 2mW  
STABLE FOR GAINS 12  
The combination of very low input voltage and current noise,  
along with a 3.9GHz gain bandwidth product, make the  
OPA847 an ideal amplifier for wideband transimpedance  
applications. As a voltage gain stage, the OPA847 is opti-  
mized for a flat frequency response at a gain of +20V/V and  
is stable down to gains as low as +12V/V. New external  
compensation techniques allow the OPA847 to be used at  
any inverting gain with excellent frequency response control.  
Using this technique in a differential Analog-to-Digital Con-  
verter (ADC) interface application, shown below, can deliver  
one of the highest dynamic-range interfaces available.  
APPLICATIONS  
HIGH DYNAMIC RANGE ADC PREAMPS  
LOW NOISE, WIDEBAND, TRANSIMPEDANCE  
AMPLIFIERS  
WIDEBAND, HIGH GAIN AMPLIFIERS  
LOW NOISE DIFFERENTIAL RECEIVERS  
ULTRASOUND CHANNEL AMPLIFIERS  
IMPROVED UPGRADE FOR THE OPA687,  
CLC425, AND LMH6624  
OPA847 RELATED PRODUCTS  
INPUT NOISE  
VOLTAGE (nV/Hz)  
GAIN BANDWIDTH  
PRODUCT (MHz)  
SINGLES  
OPA842  
OPA843  
OPA846  
2.6  
2.0  
1.2  
200  
800  
+5V  
+5V  
0.001µF  
20Ω  
1750  
OPA847  
100Ω  
1.7pF  
DIFFERENTIAL OPA847 DRIVER DISTORTION  
2VPP, at converter input.  
INP  
5V  
2kΩ  
70  
75  
50Source  
100pF  
VCM  
39pF  
39pF  
850Ω  
1:2  
ADS5500  
14-Bit  
125MSPS  
< 5.1dB  
Noise  
850Ω  
80  
0.1µF  
Figure  
85  
2kΩ  
+5V  
OPA847  
5V  
INN  
100Ω  
1.7pF  
100pF  
90  
0.001µF  
20Ω  
2nd-Harmonic  
95  
3rd-Harmonic  
100  
105  
110  
24.6dB Gain  
Ultra-High Dynamic Range  
Differential ADC Driver  
10  
20  
30  
40  
50  
Frequency (MHz)  
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.  
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
Copyright © 2002-2008, Texas Instruments Incorporated  
www.ti.com