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LTC6404_15

产品描述600MHz, Low Noise, High Precision Fully Differential Input/Output Amplifi er/Driver
文件大小335KB,共28页
制造商Linear ( ADI )
官网地址http://www.analog.com/cn/index.html
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LTC6404_15概述

600MHz, Low Noise, High Precision Fully Differential Input/Output Amplifi er/Driver

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LTC6404
600MHz, Low Noise,
High Precision Fully Differential
Input/Output Amplifier/Driver
FEATURES
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DESCRIPTION
The LTC
®
6404 is a family of AC precision, very low noise,
low distortion, fully differential input/output amplifiers
optimized for 3V, single supply operation.
The LTC6404-1 is unity-gain stable. The LTC6404-2 is
designed for closed-loop gains greater than or equal to
2V/V. The LTC6404-4 is designed for closed-loop gains
greater than or equal to 4V/V. The LTC6404 closed-loop
bandwidth extends from DC to 600MHz. In addition to the
normal unfiltered outputs (OUT
+
and OUT
), the LTC6404
has a built-in 88.5MHz differential single-pole lowpass
filter and an additional pair of filtered outputs (OUTF
+
,
OUTF
). An input referred voltage noise of 1.5nV/√Hz
make the LTC6404 able to drive state-of-the-art 16-/18-bit
ADCs while operating on the same supply voltage, saving
system cost and power. The LTC6404 is characterized, and
maintains its performance for supplies as low as 2.7V and
can operate on supplies up to 5.25V. It draws only 27.3mA,
and has a hardware shutdown feature which reduces cur-
rent consumption to 250μA.
The LTC6404 family is available in a compact 3mm
×
3mm
16-pin leadless QFN package and operates over a –40°C
to 125°C temperature range.
L,
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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Fully Differential Input and Output
Low Noise: 1.5nV/√Hz RTI
Very Low Distortion:
LTC6404-1 (2V
P-P
, 10MHz): –91dBc
LTC6404-2 (2V
P-P
, 10MHz): –96dBc
LTC6404-4 (2V
P-P
, 10MHz): –101dBc
Closed-Loop –3dB Bandwidth: 600MHz
Slew Rate: 1200V/μs (LTC6404-4)
Adjustable Output Common Mode Voltage
Rail-to-Rail Output Swing
Input Range Extends to Ground
Large Output Current: 85mA (Typ)
DC Voltage Offset < 2mV (Max)
Low Power Shutdown
Tiny 3mm
×
3mm
×
0.75mm 16-Pin QFN Package
APPLICATIONS
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Differential Input A/D Converter Driver
Single-Ended to Differential Conversion/Amplification
Common Mode Level Translation
Low Voltage, Low Noise, Signal Processing
TYPICAL APPLICATION
Single-Ended Input to Differential Output
with Common Mode Level Shifting
0.5V
P-P
0V
V
S
LTC6404-4 Distortion vs Frequency
–40
–50
–60
HD2, HD3 (dBc)
V
CM
= V
OCM
= MID-SUPPLY
V
S
= 3V
V
OUT
= 2V
P-P
R
I
= 100Ω, R
F
= 402Ω
DIFFERENTIAL INPUT
SINGLE-ENDED INPUT
50Ω
100Ω
71.5Ω
402Ω
3V 0.1μF
1V
P-P
–70
–80
–90
HD2
–100
–110
–120
–130
0.1
HD3
HD2
SIGNAL
GENERATOR
1.5VDC
0.1μF
130Ω
+
V
OCM
1.5VDC
402Ω
1V
P-P
6404 TA01
1.5VDC
HD3
1
10
FREQUENCY (MHz)
100
64044 G16
6404f
1

 
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