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LT6350CDDTRPBF

更新时间： 2024-09-24 05:43:35
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凌特 - Linear 驱动器转换器
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28页 566K
描述
Low Noise Single-Ended to Differential Converter/ADC Driver

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LT6350CDDTRPBF 数据手册

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LT6350  
Low Noise  
Single-Ended to Differential  
Converter/ADC Driver  
DESCRIPTION  
The LT®6350 is a rail-to-rail input and output low noise  
single-endedtodifferentialconverter/ADCdriverfeaturing  
fast settling time. It converts a high or low impedance,  
single-ended input signal to a low impedance, balanced,  
differential output suitable for driving high performance  
differentialsuccesiveapproximationregister(SAR)ADCs.  
Thetwoopamptopologyfeaturesverylownoiseopamps,  
that can support SNR >110dB in a 1MHz bandwidth.  
FEATURES  
n
Rail-to-Rail Input and Outputs  
n
Fast Settling Time: 240ns, 0.01%, 8V Output Step  
P-P  
n
1.9nV/√Hz Input-Referred Op Amp Noise  
n
High Impedance Input  
–3dB Bandwidth: 33MHz  
2.7V to 12V Supply Operation  
n
n
n
No External Gain-Resistors Required  
4.8mA Supply Current  
Low Power Shutdown  
n
n
Theinputopampistrimmedforconstantlowinput-referred  
n
Low Distortion (HD2/HD3): –102dBc/–97dBc at  
voltage offset over the input range to prevent V steps  
OS  
100kHz, V  
= 4V  
OUTDIFF  
P-P  
from degrading distortion.  
n
n
n
n
Low Offset Voltage: 400μV Max  
High DC Linearity: < 1LSB, 16-Bit, 8V  
Low Input Current Noise: 1.1pA/√Hz  
On a single 5V supply, the outputs can drive ADCs from  
55mV to 4.945V on each input. With the addition of a  
negative supply, the LT6350 can drive ADCs from 0V to  
4.945V on each input. Output common mode voltage is  
set by applying a voltage to the +IN2 pin.  
P-P  
3mm × 3mm 8-Pin DFN and 8-Lead MSOP Packages  
APPLICATIONS  
n
16-Bit and 18-Bit SAR ADC Drivers  
TheLT6350draws4.8mAfroma5Vsupplyandconsumes  
just 60μA in shutdown mode.  
n
Single-Ended to Differential Conversion  
n
Differential Line Driver  
The LT6350 is available in a compact 3mm × 3mm, 8-pin  
leadless DFN package and also in an 8-pin MSOP package  
and operates over a –40°C to 125°C temperature range.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
Protected by U.S. Patents including 5610557, 6344773.  
TYPICAL APPLICATION  
20kHz Sine Wave,  
–1dBFS 8192-Point FFT  
ADC Driver: Single-Ended Input to Differential Output  
0
–10  
–20  
–30  
–40  
–50  
–60  
–70  
5V  
+
–
V
V
V
= 5V, V = –5V  
= 7.3V  
= 2.05V  
OUTDIFF  
P-P  
249Ω  
0.1μF  
+IN2  
SNR = 94.9dB  
V
SINAD = 93.8dB  
IN  
+
5V  
+
+
0V to 4V –  
IN1 SHDN  
V
OUT2  
THD = –100.2dB  
SFDR = 102.2dB  
+
–
–
A
IN  
–80  
–90  
2200pF  
LTC2393-16  
+
–
+
LT6350  
A
IN  
–100  
–110  
–120  
–130  
–140  
–
+
–
V
OUT1  
IN2  
IN1  
249Ω  
–5V  
0.1μF  
0
100  
200  
300  
400  
500  
FREQUENCY (kHz)  
499Ω  
0.1μF  
6350 TA01  
6350 TA02  
2V  
6350f  
1
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