clc425 National Semiconductor Corporation, clc425 Datasheet

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clc425

Manufacturer Part Number
clc425
Description
Ultra Low Noise Wideband Op Amp
Manufacturer
National Semiconductor Corporation
Datasheet

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General Description
The CLC425 combines a wide bandwidth (1.9GHz GBW) with very
low input noise (1.05nV/ Hz, 1.6pA/ Hz) and low dc errors (100 V
V
op amp offering closed-loop gains of 10.
Singularly suited for very wideband high-gain operation, the CLC425
employs a traditional voltage-feedback topology providing all the
benefits of balanced inputs, such as low offsets and drifts, as well
as a 96dB open-loop gain, a 100dB CMRR and a 95dB PSRR.
The CLC425 also offers great flexibility with its externally adjustable
supply current, allowing designers to easily choose the optimum
set of power, bandwidth, noise and distortion performance.
Operating from ±5V power supplies, the CLC425 defaults to a
15mA quiescent current, or by adding one external resistor, the
supply current can be adjusted to less than 5mA.
The CLC425's combination of ultra-low noise, wide gain-band-
width, high slew rate and low dc errors will enable applications in
areas such as medical diagnostic ultrasound, magnetic tape & disk
storage, communications and opto-electronics to achieve maximum
high-frequency signal-to-noise ratios.
The CLC425 is available in the following versions:
CLC425AJP
CLC425AJE
CLC425A8B
CLC425ALC
CLC425AMC
CLC425AJM5
DESC SMD number : 5962-93259.
Printed in the U.S.A.
N
CLC425
Ultra Low Noise Wideband Op Amp
OS
1999 National Semiconductor Corporation
, 2 V/°C drift ) to provide a very precise, wide dynamic-range
V
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
-40°C to +85°C
-55°C to +125°C
-40°C to +85°C
non-inv
V
V
EE
o
SOT23-5
Pinout
8-pin PDIP
8-pin SOIC
8-pin CERDIP,
MIL-STD-883, Level B
dice
dice, MIL-STD-883, Level B
5-pin SOT
V
V
CC
inv
Features
Applications
V
1.9GHz gain-bandwidth product
Instrumentation sense amplifiers
non-inv
1.05nV/ Hz input voltage noise
0.8pA/ Hz @ Icc < 5mA
100 V input offset voltage, 2 V/°C drift
350V/ s slew rate
15mA to 5mA adjustable supply current
Gain range ±10 to ±1,000V/V
Evaluation boards & simulation
macromodel
0.9dB NF @ R
Ultrasound pre-amps
Magnetic tape & disk pre-amps
Photo-diode transimpedance amplifiers
Wide band active filters
Low noise figure RF amplifiers
Professional audio systems
Low-noise loop filters for PLLs
-V
V
NC
10
inv
cc
1
100
Equivalent Input Voltage Noise
1
2
3
4
1k
DIP & SOIC
Pinout
-
+
10k
s
Frequency (Hz)
= 700
100k
1.05nV/ Hz
1M
8
7
6
5
R
+V
V
NC
10M
out
p
cc
http://www.national.com
(optional)
100M
June 1999

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clc425 Summary of contents

Page 1

... The CLC425 also offers great flexibility with its externally adjustable supply current, allowing designers to easily choose the optimum set of power, bandwidth, noise and distortion performance. Operating from ±5V power supplies, the CLC425 defaults to a 15mA quiescent current adding one external resistor, the supply current can be adjusted to less than 5mA. ...

Page 2

... CLC425 Electrical Characteristics PARAMETERS CONDITIONS Ambient Temperature CLC425 AJ FREQUENCY DOMAIN RESPONSE gain bandwidth product V out -3dB bandwidth V out V out gain flatness V out peaking DC to 30MHz rolloff DC to 30MHz linear phase deviation DC to 30MHz TIME DOMAIN RESPONSE rise and fall time 0.4V step settling time to 0 ...

Page 3

3 http://www.national.com ...

Page 4

http://www.national.com 4 ...

Page 5

... CLC425 performance. The additional noise contribution minimized through the use of a shunt capacitor ...

Page 6

... R pensation capacitors are chosen to reduce frequency response peaking to less than 1dB. The plot in the "Typical Performance" section labeled “Differential Gain and Phase” shows the video performance of the CLC425 with this compensation circuitry and the parallel combination of R ...

Page 7

... Very Low Noise Figure Amplifier f The circuit of Figure 14 implements a very low Noise Figure amplifier using a step-up transformer combined ) equa- with a CLC425 and a CLC404. The circuit is configured ni with a gain of 35.6dB. The circuit achieves measured ) showing all Noise Figures of less than 2.5dB in the 10-40MHz ...

Page 8

... Sallen-Key Figure 19: Phased-Locked Loop Filter Decreasing the Input Noise Voltage The input noise voltage of the CLC425 can be reduced from its already low 1.05nV slightly increasing the supply current. Using a 50k resistor to ground on pin 8, as shown in the circuit of Figure 14, will increase the quiescent current to 17mA and reduce the input noise voltage to < ...

Page 9

... National’s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of National Semiconductor Corporation. As used herein: 1. Life support devices or systems are devices or systems which, a) are intended for surgical implant into the body support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user ...

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