Final Electrical Specifications
LT1567
1.4nV/鈭欻z 175MHz Op Amp
and Inverter / Filter Building Block
August 2001
FEATURES
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s
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s
DESCRIPTIO
Single-Ended to Differential Conversion
Low Noise: 1.4nV/鈭欻z
20碌V
RMS
Total Wideband Noise Filter with 2MHz f
C
Dynamic Range: 104dB SNR at
鹵5V
Supply Voltage 2.7V to 12V Total
Rail-to-Rail Outputs
DC Accurate: Op Amp V
OS
1mV (Typ)
Trimmed Bandwidth for Accurate Filters
MSOP-8 Surface-Mount Package
No External Clock Required
The LT
廬
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.
APPLICATIO S
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Low Noise, High Speed Filters to 5MHz
Cellular Base Stations
Communication Channel or Roofing Filters
Antialias or Reconstruction Filtering
Video Signal Processing
Single-Ended to Differential Conversion
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
2MHz 3-Pole Antialias Filter with
Single-Ended to Differential Conversion
V
536鈩?/div>
270pF
1
2
270pF
0.1碌F
3
4
0.1碌F
LT1567
8
7
6
5
270pF
+A
IN
ADC
鈥揂
IN
147鈩?/div>
LTC1420
GAIN (dB)
+
12
0.1碌F
6
0
536鈩?/div>
V
IN
536鈩?/div>
147鈩?/div>
鈥?
鈥?2
鈥?8
鈥?4
NOTE: THIS IS RESPONSE FROM
SINGLE-ENDED V
IN
TO DIFFERENTIAL
鈥?0
VOLTAGE ACROSS ADC INPUT,
SO THERE IS A BUILT-IN 6dB GAIN.
鈥?6
100
1M
FREQUENCY (Hz)
V
鈥?/div>
96dB DIFFERENTIAL SNR AT 3V TOTAL SUPPLY.
1567 TA01
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.
U
Frequency Response
10M
1567 TA01a
U
U
1
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