
CLC5801
High Speed Low Noise Voltage Feedback Amplifier
General Description
The CLC5801 is a low-cost, wideband voltage feedback
amplifier excellent for low noise applications. It combines
a wide bandwidth of 420MHz with very low noise
(2nV/
, 1.8pA/
) and low DC errors (100μV V
OS
)
making it an excellent precision high speed op amp offering
closed-loop gains of
≥
10.
The CLC5801 employs a traditional voltage-feedback topol-
ogy and provides all the benefits of balanced inputs, such as
low offsets and drifts, as well as 96dB open-loop gain, 95dB
CMRR and a 90dB PSRR. Providing a wide 420MHz band-
width at a gain of A
= 10, a fast 300V/μs slew rate, the
CLC5801 is well suited for wide band active filters and low
noise loop filters for PLLs.
The low noise, wide gain-bandwidth, high slew rate and low
DC errors enable applications such as medical diagnostic ul-
trasound, magnetic tape and disk storage, communications
and optoelectronics that require maximum high-frequency
signal-to-noise ratios. Low noise and offset make the
CLC5801 and ideal preamplifier for CD-ROMs and receiv-
ers.
The CLC5801 consumes 16mA of supply current and can be
used in either dual 5V systems or single supply applications.
It can easily drive a 100
load to within 1.6V of either rail.
The CLC5801 is available in both SOIC-8 and the tiny
SOT23-5.
Features
(T
A
= 25C, V
S
=
±
5V, R
L
= 100
Typical unless specified).
n
420MHz, 3dB bandwidth (A
V
= 10)
n
2nV/
input voltage noise
n
1.8pA/
input current noise
n
100μV input offset voltage
n
300V/μs slew rate
n
16mA supply current
n
18ns settling time
Applications
n
Ultrasound preamplifier
n
CD-ROM preamplifer
n
Photo-diode transimpedance amplifier
n
Low-noise loop filters for PLLs
n
High-performance receivers
n
ADC preamplifier
Connection Diagrams
Equivalent Input Noise
DS101307-1
5-Pin SOT23-5
DS101307-2
Top View
8-Pin SOIC
DS101307-3
Top View
May 2000
C
2000 National Semiconductor Corporation
DS101307
www.national.com