LTC6601-2
Low Power, Low Distortion,
5MHz to 27MHz, Pin Configurable
Filter/ADC Driver
FEATURES
DESCRIPTION
The LTC®6601-2 is a low power, low distortion, very
easy-to-use fully differential 2nd order active broadband
RC filter and driver. On-chip resistors, capacitors, and
amplifier bandwidth are trimmed to provide consistent
and repeatable filter characteristics.
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Pin Configurable Gain and Filter Response
Up to 27MHz
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Low Power: 16mA at 3V
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Low Distortion (2V
)
P-P
1MHz: –96dBc 2nd, –112dBc 3rd
10MHz: –65dBc 2nd, –78dBc 3rd
Thefiltercharacteristicsarepin-strapconfigurable. Cutoff
frequencies range from 5MHz to 27MHz. Gain is pin-strap
programmable between –17dB and +17dB.
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Few External Components Required
Resistors Trimmed to 0.5% Accuracy Typical
Capacitors Trimmed to 0.5% Accuracy Typical
Adjustable Output Common Mode Voltage
Rail-to-Rail Output Swing
Power Configurability and Low Power Shutdown
Tiny 0.75mm 20-Lead (4mm × 4mm) QFN Package
A three-state BIAS pin is provided to adjust amplifier
power consumption. Select between low power (50%
power reduction), high performance and standby modes
with the BIAS pin.
The LTC6601 family comes in two options which trade
off distortion and noise. The LTC6601-2 offers the lowest
distortion at high frequencies. The LTC6601-1 is config-
ured for lowest noise. Both are available in pin-compatible
packages.
APPLICATIONS
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Differential A/D Converter Driver
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Antialiasing/Reconstruction Filter
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Single-Ended to Differential Conversion/Amplification
The LTC6601-2 is available in a compact 4mm × 4mm
20-pin leadless QFN package.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 6271719.
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Low Voltage, Low Noise, Differential Signal
Processing
Common Mode Voltage Translation
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Portable Instrumentation
TYPICAL APPLICATION
Distortion Comparison Between LTC6601-1 and LTC6602-2
15MHz Filter, Single-Ended Input, Low Power Mode
25MHz Filter, Single-Ended Input, Low Power Mode
–40
–50
–50
–60
–70
–80
–90
–60
–70
–80
–90
–100
–100
–110
–120
LTC6601-1 HD2
LTC6601-2 HD2
LTC6601-1 HD3
LTC6601-2 HD3
LTC6601-1 HD2
LTC6601-2 HD2
–110
LTC6601-1 HD3
LTC6601-2 HD3
–120
1
10
FREQUENCY (MHz)
100
1
10
100
FREQUENCY (MHz)
66012 TA01b
66012 TA01a
66012f
1