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

)

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

= 25°C, V

5V, R

= 100

Typical unless specified).

420MHz, -3dB bandwidth (A

= 10)

2nV/

input voltage noise

1.8pA/

input current noise

100µV input offset voltage

300V/µs slew rate

16mA supply current

18ns settling time

Applications

Ultrasound preamplifier

CD-ROM preamplifer

Photo-diode transimpedance amplifier

Low-noise loop filters for PLLs

High-performance receivers

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

CLC5801

High

Speed

Low

Noise

oltage

Feedback

Amplifier

DS101307

www.national.com

Absolute Maximum Ratings

(Note 1)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

OUT

Short Circuit protected to

ground. Maximum reliability is
obtained if I

OUT

does not exceed:

125mA

Common-Mode Input Voltage

Maximum Junction Temperature

+125°C

Storage Temperature Range

-65°C to +150°C

Lead Temperature (soldering 10 sec)

+300°C

ESD (human body model)

1000V

Operating Rating

(Note 1)

Thermal Resistance (

)

SOIC

65°C/W

SOT23-5

115°C/W

Thermal Resistance (

)

SOIC

145°C/W

SOT23-5

185°C/W

Temperature Range

-40°C to +85°C

Recommended Gain Range

10 to

1000V/V

Electrical Characteristics

= 25°C, V

5V, R

= 26.1

, R

= 499

, R

= 100

; unless specified).

Symbol

Parameter

Conditions

Typ

Min/Max Ratings

(Note 2)

Units

+25°C

-40°C

+25°C

+85°C

Frequency Domain Response

GBW

Gain Bandwidth Product

0.4V

1.8

1.3

GHz

SSBW

-3dB Bandwidth (A

= +10)

0.4V

420

MHz

-3dB Bandwidth (A

= +20)

0.4V

LSBW

-3dB Bandwidth

5.0V

GFP

Gain Flatness Peaking

DC to 30MHz, V

0.4V

0.4

0.5

GFR

Gain Flatness Rolloff

DC to 30MHz, V

0.4V

0.2

0.5

LPD

Linear Phase Deviation

DC to 30MHz, V

0.4V

0.8

1.5

Deg

Time Domain Response

TRS

Rise and Fall Time

0.4V step

4.0

4.7

TSS

Settling Time to 0.2%

2V step

Overshoot

0.4V step

Slew Rate

2V step

300

250

V/µs

Distortion And Noise Response

HD2

2nd Harmonic Distortion

,10MHz

-53

-48

dBc

HD3

3rd Harmonic Distortion

,10MHz

-78

-65

dBc

IMD

3rd Order Intermod. Intercept

10MHz

dBm

Equivalent Input Noise Voltage

1MHz to 100MHz

2.0

2.7

nV/

ICN

Equivalent Input Noise Current

1MHz to 100MHz

1.8

2.5

pA/

Static, DC Performance

AOL

Open-Loop Gain

VIO

Input Offset Voltage (Note 3)

100

1000

800

1000

µV

DVIO

Offset Voltage Average Drift

µV/°C

Input Bias Current (Note 3)

µA

DIB

Bias Current Average Drift

-100

-250

-120

µA/°C

IIO

Input Offset Current

0.2

3.4

2.0

µA

DIIO

Offset Current Average Drift

nA/°C

PSRR

Power Supply Rejection Ratio

CMRR

Common Mode Rejection Ratio

ICC

Supply Current (Note 3)

CLC5801

www.national.com

Electrical Characteristics

(Continued)

= 25°C, V

5V, R

= 26.1

, R

= 499

, R

= 100

; unless specified).

Symbol

Parameter

Conditions

Typ

Min/Max Ratings

(Note 2)

Units

+25°C

-40°C

+25°C

+85°C

Miscellaneous Performance

RINC

Input Resistance

Common-Mode

0.6

1.6

RIND

Differential-Mode

CINC

Input Capacitance

Common-Mode

1.5

CIND

Differential-Mode

1.9

ROUT

Output Resistance

Closed Loop

Output Voltage Range

3.8

3.5

3.7

VOL

= 100

3.4

2.8

3.2

CMIR

Input Voltage Range

Common-Mode

3.8

3.4

3.5

IOP

Output Current

Source

ION

Sink

Note 1: "Absolute Maximum Ratings" are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices
should be operated at these limits. The table of "Electrical Characteristics" specifies conditions of device operation. Operating Ratings indicate conditions for which
the device is intended to be functional, but specific performance is not guaranteed,

Note 2: Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are determined
from tested parameters.

Note 3: 100% tested at +25°C.

CLC5801

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