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LT6350_15

产品描述Low Noise Single-Ended to Differential Converter/ADC Driver
文件大小860KB,共28页
制造商Linear ( ADI )
官网地址http://www.analog.com/cn/index.html
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LT6350_15概述

Low Noise Single-Ended to Differential Converter/ADC Driver

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FeaTures
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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-ended to differential converter/ADC driver featuring
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
differential succesive approximation register (SAR) ADCs.
The two op amp topology features very low noise op amps,
that can support SNR >110dB in a 1MHz bandwidth.
The input op amp is trimmed for constant low input-referred
voltage offset over the input range to prevent V
OS
steps
from degrading distortion.
On a single 5V supply, the outputs can swing from 55mV to
4.945V. With the addition of a negative supply, the LT6350
can swing from 0V to 4.945V. Output common mode voltage
is set by applying a voltage to the +IN2 pin.
The LT6350 draws 4.8mA from a 5V supply and consumes
just 60µA in shutdown mode.
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.
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Rail-to-Rail Input and Outputs
Fast Settling Time: 240ns, 0.01%, 8V
P-P
Output Step
1.9nV/√Hz Input-Referred Op Amp Noise
High Impedance Input
–3dB Bandwidth: 33MHz
2.7V to 12V Supply Operation
No External Gain Resistors Required
4.8mA Supply Current
Low Power Shutdown
Low Distortion (HD2/HD3): –102dBc/–97dBc at
100kHz, V
OUTDIFF
= 4V
P-P
Low Offset Voltage: ±400µV Max
High DC Linearity: <±1LSB, 16-Bit, 8V
P-P
Low Input Current Noise: 1.1pA/√Hz
3mm
×
3mm 8-Pin DFN and 8-Lead MSOP Packages
applicaTions
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16-Bit and 18-Bit SAR ADC Drivers
Single-Ended to Differential Conversion
Differential Line Driver
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
ADC Driver: Single-Ended Input to Differential Output
5V
0.1µF 249
OUT2
A
IN–
MAGNITUDE (dB)
V
IN
0V TO 4V
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
20kHz Sine Wave,
–1dBFS 8192-Point FFT
V
+
= 5V, V
= –5V
V
OUTDIFF
= 7.3V
P-P
V
+IN2
= 2.05V
SNR = 94.9dB
SINAD = 93.8dB
THD = –100.2dB
SFDR = 102.2dB
+
+IN1
SHDN
V
+
5V
+
– IN1
+IN2
499
2V
0.1µF
–5V
+
LT6350
2200pF
LTC2393-16
A
IN+
V
OUT1
249
0
100
0.1µF
6350 TA01
200
300
FREQUENCY (kHz)
400
500
6350 TA02
6350fc
For more information
www.linear.com/LT6350
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