NSC CLC425AJE, CLC425AJ, CLC425MDC, CLC425AWG-QML, CLC425AJP Datasheet

N

CLC425
Ultra Low Noise Wideband Op Amp

 1999 National Semiconductor Corporation http://www.national.com

Printed in the U.S.A.

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

µµ

µµ

µV

VOS, 2

µµ

µµ

µV/°C drift) to provide a very precise, wide dynamic-range

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-band­width, 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 -40°C to +85°C 8-pin PDIP

CLC425AJE -40°C to +85°C 8-pin SOIC
CLC425A8B -55°C to +125°C 8-pin CERDIP,

MIL-STD-883, Level B
CLC425ALC -40°C to +85°C dice
CLC425AMC -55°C to +125°C dice, MIL-STD-883, Level B
CLC425AJM5 -40°C to +85°C 5-pin SOT
DESC SMD number : 5962-93259.

June 1999

CLC425

Ultra Low Noise Wideband Op Amp

Features

■ 1.9GHz gain-bandwidth product
■ 1.05nV/√Hz input voltage noise
■ 0.8pA/√Hz @ Icc < 5mA
■ 100µV input offset voltage, 2µV/°C drift
■ 350V/µs slew rate
■ 15mA to 5mA adjustable supply current
■ Gain range ±10 to ±1,000V/V
■ Evaluation boards & simulation

macromodel

■ 0.9dB NF @ R

s

= 700Ω

Applications

■ Instrumentation sense amplifiers
■ 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

Frequency (Hz)

10

1

Equivalent Input Voltage Noise

100 1k 10k 100k 1M 10M 100M

Voltage Noise (nV/√Hz)

1.05nV/√Hz

V

inv

V

CC

V

EE

V

o

V

non-inv

Pinout

SOT23-5

-

+

1
2
3
4

NC

V

inv

V

non-inv

-V

cc

R

p

(optional)

+V

cc

V

out

NC

8
7
6
5

Pinout

DIP & SOIC

CLC425 Electrical Characteristics (V

CC

= ±5V; A

V

= +20; R

f

=499

ΩΩ

ΩΩ

Ω; R

g

= 26.1

ΩΩ

ΩΩ

Ω; R

L

= 100

ΩΩ

ΩΩ

Ω; unless noted)

PARAMETERS CONDITIONS TYP MIN/MAX RATINGS UNITS SYMBOL

Ambient Temperature CLC425 AJ +25

°

C -40°C +25°C +85°C

FREQUENCY DOMAIN RESPONSE

gain bandwidth product V

out

< 0.4V

pp

1.9 1.5 1.5 1.0 GHz GBW

-3dB bandwidth V

out

< 0.4V

pp

95 75 75 50 MHz SSBW

V

out

< 5.0V

pp

40 30 30 20 MHz LSBW

gain flatness V

out

< 0.4V

pp

peaking DC to 30MHz 0.3 0.7 0.5 0.7 dB GFP
rolloff DC to 30MHz 0.1 0.7 0.5 0.7 dB GFR
linear phase deviation DC to 30MHz 0.7 1.5 1.5 2.5 ° LPD

TIME DOMAIN RESPONSE

rise and fall time 0.4V step 3.7 4.7 4.7 7.0 ns TRS
settling time to 0.2% 2V step 22 30 30 40 ns TSS
overshoot 0.4V step 5 12 10 12 % OS
slew rate 2V step 350 250 250 200 V/µsSR

DISTORTION AND NOISE RESPONSE

2

nd

harmonic distortion 1Vpp, 10MHz - 53 48 48 46 dBc HD2
3rd harmonic distortion 1Vpp, 10MHz - 75 65 65 60 dBc HD3
3

rd

order intermodulation intercept 10MHz 35 dBm IMD

equivalent noise input

voltage 1MHz to 100MHz 1.05 1.25 1.25 1.8 nV/√Hz VN
current 1MHz to 100MHz 1.6 4.0 2.5 2.5 pA/√Hz ICN

noise figure R

S

= 700Ω 0.9 dB NF

STATIC DC PERFORMANCE

open-loop gain DC 96 77 86 86 dB AOL

*input offset voltage ± 100 ±1000 ± 800 ± 1000 µV VIO

average drift ± 2 8

____

4 µV/°C DVIO

*input bias current 12 40 20 20 µAIB

average drift - 100 - 250

____

- 120 nA/°C DIB

input offset current ± 0.2 3.4 2.0 2.0 µA IIO

average drift ± 3 ± 50

____

± 25 nA/°C DIIO
power supply rejection ratio DC 95 82 88 86 dB PSRR
common mode rejection ratio DC 100 88 92 90 dB CMRR

*supply current R

L

= ∞ 15 18 16 16 mA ICC

MISCELLANEOUS PERFORMANCE

input resistance common-mode 2 0.6 1.6 1.6 MΩ RINC

differential-mode 6 1 3 3 kΩ RIND

input capacitance common-mode 1.5 2 2 2 pF CINC

differential-mode 1.9 3 3 3 pF CIND
output resistance closed loop 5 50 10 10 mΩ ROUT
output voltage range R

L

= ∞ ±3.8 ±3.5 ±3.7 ±3.7 V VO

R

L

=100Ω ±3.4 ±2.8 ±3.2 ±3.2 V VOL
input voltage range common mode ± 3.8 ±3.4 ± 3.5 ± 3.5 V CMIR
output current source 80 70 70 70 mA IOP

sink 80 45 55 55 mA ION

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

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Absolute Maximum Ratings Miscellaneous Ratings

V

cc

±7V

I

out

short circuit protected to ground, however maximum reliabiliy
is obtained if I

out

does not exceed... 125mA

common-mode input voltage ±V

cc

maximum junction temperature +150°C
operating temperature range:

AJ -40°C to +85°C
storage temperature range -65°C to +150°C
lead temperature (soldering 10 sec) +300°C
ESD (human body model) 1000V

Recommended gain range ±10 to ±1,000V/V

Notes:

* AJ :100% tested at +25°C.

Pac kage Thermal Resistance

Package

θθ

θθ

θ

JC

θθ

θθ

θ

JA

AJP 70°C/W 125°C/W
AJE 65°C/W 145°C/W
A8B 45°C/W 135°C/W

AJM5 115°C/W 185°C/W

Reliability Information

Transistor count 31

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