LT1567 Datasheet, PDF (1/8 Pages) Linear Technology – 1.4nV/Hz 175MHz Op Amp and Inverter / Filter Building Block

Final Electrical Specifications
LT1567
1.4nV/√Hz 175MHz Op Amp
and Inverter / Filter Building Block
August 2001
FEATURES
s _{Single-Ended to Differential Conversion}
s _{Low Noise: 1.4nV/√Hz}
s _{20µVRMS Total Wideband Noise Filter with 2MHz fC}
s _{Dynamic Range: 104dB SNR at ±5V}
s _{Supply Voltage 2.7V to 12V Total}
s _{Rail-to-Rail Outputs}
s _{DC Accurate: Op Amp VOS 1mV (Typ)}
s _{Trimmed Bandwidth for Accurate Filters}
s _{MSOP-8 Surface-Mount Package}
s _{No External ClockURequired}
APPLICATIO S
s _{Low Noise, High Speed Filters to 5MHz}
s _{Cellular Base Stations}
s _{Communication Channel or Roofing Filters}
s _{Antialias or Reconstruction Filtering}
s _{Video Signal Processing}
s _{Single-Ended to Differential Conversion}
DESCRIPTIO
The LT^®1567 is an analog building block optimized for
very low-noise high-frequency filter applications. It con-
tains two wideband operational amplifiers, one of them
internally configured as a unity-gain inverter. With the
addition of two capacitors, the LT1567 becomes a flexible
second-order filter section with cutoff frequency (f_C) up to
5MHz, ideal for antialiasing or for channel filtering in high-
speed data communications systems.
In addition to low noise and high speed LT1567 features
single-ended to differential conversion for direct driving of
high speed A/D converters. The LT1567 operates from a
total power-supply voltage of 2.7V to 12V and can support
signal-to-noise ratios above 100dB.
The LT1567 is available in an 8-lead MSOP package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
536Ω
V_IN
270pF
2MHz 3-Pole Antialias Filter with
Single-Ended to Differential Conversion
V⁺
536Ω
0.1µF
270pF
536Ω
1
8
0.1µF
2
7
3 ^LT1567
6
4
5
0.1µF
147Ω
270pF
147Ω
+A_IN
ADC
–A_IN
LTC1420
V^– _{96dB DIFFERENTIAL SNR AT 3V TOTAL SUPPLY. 1567 TA01}
Frequency Response
12
6
0
–6
–12
–18
–24 _{NOTE: THIS IS RESPONSE FROM}
–30
SINGLE-ENDED V_IN TO DIFFERENTIAL
VOLTAGE ACROSS ADC INPUT,
–36 ^{SO THERE IS A BUILT-IN 6dB GAIN.}
100
1M
10M
FREQUENCY (Hz)
1567 TA01a
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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