LTC6403-1 Datasheet, PDF (1/20 Pages) Linear Technology – 200MHz, Low Noise, Low Power Fully Differential Input/Output Amplifi er/Driver

LTC6403-1
200MHz, Low Noise,
Low Power Fully Differential
Input/Output Amplifier/Driver
FEATURES
■ _{Very Low Distortion: (2VP-P, 3MHz): –95dBc}
■ _{Fully Differential Input and Output}
■ _{Low Noise: 2.8nV/√Hz Input-Referred}
■ _{200MHz Gain-Bandwidth Product}
■ _{Slew Rate: 200V/μs}
■ _{Adjustable Output Common Mode Voltage}
■ _{Rail-to-Rail Output Swing}
■ _{Input Range Extends to Ground}
■ _{Large Output Current: 60mA (Typ)}
■ _{DC Voltage Offset <1.5mV (Max)}
■ _{10.8mA Supply Current}
■ _{2.7V to 5.25V Supply Voltage Range}
■ _{Low Power Shutdown}
■ _{Tiny 3mm × 3mm × 0.75mm 16-Pin QFN Package}
APPLICATIONS
■ _{Differential Input A/D Converter Driver}
■ _{Single-Ended to Differential Conversion/Amplification}
■ _{Common Mode Level Translation}
■ _{Low Voltage, Low Noise, Signal Processing}
DESCRIPTION
The LTC^®6403-1 is a precision, very low noise, low dis-
tortion, fully differential input/output amplifier optimized
for 3V to 5V, single supply operation. The LTC6403-1 is
unity gain stable. The LTC6403-1 closed-loop bandwidth
extends from DC to 200MHz. In addition to the normal
unfiltered outputs (+OUT and –OUT), the LTC6403-1 has a
built-in 44.2MHz differential single-pole low pass filter and
an additional pair of filtered outputs (+OUTF, and –OUTF).
An input referred voltage noise of 2.8nV/√^⎯H^⎯z enables the
LTC6403-1 to drive state-of-the-art 14- to 18-bit ADCs
while operating on the same supply voltage, saving system
cost and power. The LTC6403-1 maintains its performance
for supplies as low as 2.7V. It draws only 10.8mA, and
has a hardware shutdown feature which reduces current
consumption to 170μA.
The LTC6403-1 is available in a compact 3mm × 3mm
16-pin leadless QFN package and operates over a –40°C
to 85°C temperature range.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Single-Ended Input to Differential Output
with Common Mode Level Shifting
2V_P-P
0V
V_{S 50Ω}
392Ω
402Ω
SIGNAL
GENERATOR
54.9Ω
3V _0.1μF
+
V_OCM
LTC6403-1
0.01μF
–
1V_P-P
1.5V
1.5V
1V_P-P
422Ω
402Ω
64031 TA01
Harmonic Distortion vs Frequency
–30 _{SINGLE-ENDED INPUT}
–40 ^VS ^{= 3V}
V_OCM = V_ICM = 1.5V
–50 ^RF ^{= R}I ^{= 402Ω}
R_LOAD = 800Ω
–60 V_OUTDIFF = 2V_P-P
–70
–80
THIRD
–90
SECOND
–100
–110
–120
1
10
FREQUENCY (MHz)
100
64031 TA01b
64031f
1