NSC CLC5509CMX, CLC5509CM Datasheet

CLC5509
Ultra-Low Noise Preamplifier

General Description

The CLC5509 is a high performance, ultra-low noise pream­plifier designed for applications requiring unconditional sta­bility for wide ranges of complex input loads. Both input im­pedance and gain are externally adjustable, which make it
simple to interface to peizoelectric ultrasound transducers.
The CLC5509 preamplifier’s low 0.58nV

total input
noise makes it ideal for noise sensitive front ends. The high
repeatability in group delay over voltage and temperature
translates intoprecisionedge measurements for Doppler ap­plications.

The IC consists of an emitter input, common base amplifier
stage followed by a low distortion, closed loop buffer. Exter­nal negative feedback creates a well controlled input imped­ance to allow a near noiseless active input transmission line
termination. The preamp is stable against changes in source
impedance of 50 to 200Ω over temperature and supply
variations, with gains from 14dB to 26dB. The CLC5509
preamp architecture is also well suited for use with
magneto-resistive tape or disk drive heads. In these applica­tions the head bias current can be reused to bias the
preamp. The part is packaged in an 8-pin plastic SOIC, and
runs off

±

5V supplies. External biasing is required for the in-

put signal path.
The CLC5509 is constructed using an advanced comple-

mentary bipolar process and National Semiconductor’s
proven high performance architectures.

Features

n 0.58nV total input noise@12MHz

n

<

.5ns group delay repeatability

n High cutoff −3dB

@

33MHz

n Low cutoff −3dB

@

0.5MHz

n 2.0dB noise figure

@

50Ω

n −60dBc intermod for 2V

PP

@

5MHz

n Supply current: 11mA
n Available in 8-pin SOIC

Applications

n Ultrasound preamp
n Tape drive preamp
n Disk drive preamp

Connection Diagram

Group Delay Repeatability

DS101304-1

DS101304-3

Pinout

SOIC

January 2000

CLC5509 Ultra-Low Noise Preamplifier

© 2000 National Semiconductor Corporation DS101304 www.national.com

Typical Application

Ordering Information

Package Temperature Range

Industrial

0˚C to 70˚C

Packaging

Marking

Transport Media NSC

Drawing

8-pin SOIC CLC5509CM CLC5509CM Rails M08A

DS101304-2

Ultrasound PreAmp

CLC5509

www.national.com 2

Absolute Maximum Ratings (Note 1)

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

Supply Voltage

±

5.5V

Output Current 70mA

Common-Mode Input Voltage

±

V

CC

Maximum Junction Temperature +150˚C
Storage Temperature Range −65˚C to +150˚C
Lead Temperature (soldering 10 sec) +300˚C
ESD Rating (human body model) 4000V

Electrical Characteristics (Note 3)

(VCC,V

EE

=

±

5V, R

S

=

50Ω,A

V

=

10V/V, R

g

=

1kΩ,R

L

=

100Ω; unless specified)

Symbol Parameter Conditions Typ Min/Max

Ratings

(Note 2)

Units

Ambient Temperature CLC5509 +25˚C +25˚C

Frequency Domain Response

-3dB Bandwidth V

O

<

2.0V

PP

High Cutoff −3dB 33 28

45

MHz

Low Cutoff −3dB 0.5 0.4

0.7

MHz

Gain Flatness Inband 2

<

12.5MHz, V

O

<

1.0V

PP

−1.5
+.1

dB

Gain Accuracy

@

5MHz

±

0.3 dB

Phase Variation 3

<

9MHz, V

O

<

.1V

PP

1 Deg

Gain Variation 3

<

9MHz, V

O

<

.1V

PP

.3 dB

Time Domain Response

Rise and Fall Time 2V step 10 10

15

ns

Settling Time to 0.2

%

2V step 1 µs

Overshoot 2V step 0 5

%

Group Delay 2.5MHz

<

10MHz, V

IN

=

10mV

PP

5.5 3

7.5

ns

Group Delay Repeatability .5 ns

Distortion And Noise Response

2nd Harmonic Distortion

<

12.5MHz, V

IN

=

100mV

PP

−51 dBc
3rd Harmonic Distortion −56 dBc
Intermodulation Distortion

@

5MHz −65 dBc

Equivalent Input Noise Voltage (e

ni

)

>

1MHz, R

S

=

50Ω 0.7 0.78 nV

Noise Figure

@

50Ω 2 2.4 dB

Optimum R

S

85 80

110

Ω

Static, DC Performance

PSRR (preamp only)

<

1MHz 40 dB

Supply Current (preamp only) R

L

=

∞

911mA

Miscellaneous Performance

Output Impedance DC

<

12MHz 0.2 0.2

1

Ω

Output Voltage Range R

L

=

100Ω

±

2

±

1.7 V

Output Current

±

45

±

35 mA

CLC5509

www.national.com3

Electrical Characteristics (Note 3) (Continued)

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.
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: All data taken in circuit shown as typical application.

Typical Performance Characteristics

Frequency Response

DS101304-4

Frequency Response

DS101304-5

Frequency Response

DS101304-6

Group Delay

DS101304-7

Group Delay

DS101304-8

3rd Harmonic Distortion

DS101304-9

CLC5509

www.national.com 4