June 1999
N
CLC425
Ultra Low Noise Wideband Op Amp
General Description
Features
The CLC425 combines a wide bandwidth (1.9GHz GBW) with very
lowinputnoise(1.05nV/√Hz, 1.6pA/√Hz)andlowdcerrors(100µV
VOS, 2µV/°C drift) to provide a very precise, wide dynamic-range
op amp offering closed-loop gains of ≥10.
■ 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
Singularlysuitedforverywidebandhigh-gainoperation,theCLC425
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.
■ 15mA to 5mA adjustable supply current
■ Gain range ±10 to ±1,000V/V
■ Evaluation boards & simulation
macromodel
■ 0.9dB NF @ R = 700Ω
s
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.
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
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.
Equivalent Input Voltage Noise
10
The CLC425 is available in the following versions:
CLC425AJP
CLC425AJE
CLC425A8B
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
8-pin PDIP
8-pin SOIC
8-pin CERDIP,
MIL-STD-883, Level B
dice
dice, MIL-STD-883, Level B
5-pin SOT
CLC425ALC
CLC425AMC
CLC425AJM5
-40°C to +85°C
-55°C to +125°C
-40°C to +85°C
1.05nV/√Hz
1
100
1k
10k
100k
1M
10M 100M
Frequency (Hz)
DESC SMD number : 5962-93259.
Pinout
SOT23-5
Pinout
DIP & SOIC
Vo
VCC
NC
1
2
3
4
8
7
6
5
Rp (optional)
+Vcc
-
Vinv
Vnon-inv
-Vcc
VEE
+
Vout
Vnon-inv
Vinv
NC
1999 National Semiconductor Corporation
Printed in the U.S.A.
http://www.national.com