CLC5526
www.ti.com
SNOS914E –JUNE 1999–REVISED MARCH 2013
CLC5526 Digital Variable Gain Amplifier (DVGA)
Check for Samples: CLC5526
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FEATURES
DESCRIPTION
The CLC5526 is
a high performance, digitally
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350 MHz Bandwidth
controlled, variable-gain amplifier (DVGA). It has
been designed for use in a broad range of mixed
signal and digital communication applications such as
mobile radio, cellular base stations and back-channel
modems where automatic-gain-control (AGC) is
required to increase system dynamic range.
Differential Input and Output
Gain Control: Parallel w/data Latching
Supply Voltage: +5V
Supply Current: 48 mA
The CLC5526 has differential input and output,
allowing large signal swings on a single 5V rail. The
input impedance is 200Ω. The differential output
impedance is 600Ω and is designed to drive a 1 kΩ
differential load. The output amplifier has excellent
intermodulation performance. The CLC5526 is
designed to accept signals from RF elements and
maintain a terminated impedance environment.
KEY SPECIFICATIONS
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Low Two Tone Intermod:
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Distortion: −64 dBc @ 1 VPP, 150 MHz
24.5 dBm IP3, 150 MHz
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Low Noise: 2.5 nV/√Hz (Max Gain), 9.3 dB
Noise Figure (Max Gain)
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Wide Gain Range: +30 dB to −12 dB
The CLC5526 maintains a 350 MHz bandwidth over
its entire gain and attenuation range from +30 dB to
−12 dB. Internal clamping ensures very fast overdrive
recovery. Two tone intermodulation distortion is
excellent: at 150 MHz, 1 Vpp it is −64 dBc.
Gain Step Size: 6 dB
APPLICATIONS
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Cellular/PCS Base Stations
IF Sampling Receivers
Infrared/CCD Imaging
Back-channel Modems
Electro-optics
Input signals to the CLC5526 are scaled by an
accurate, differential R-2R resistive ladder with an
input impedance of 200Ω. A scaled version of the
input is selected under digital control and passed to
the internal amplifier. The input common mode level
is set at 2.4V via a bandgap referenced bias
generator which can be overridden by an external
input.
Instrumentation
Medical Imaging
High Definition Video
Following the resistive ladder is a fixed, 30 dB gain
amplifier. The output stage common mode voltage of
the CLC5526 is set to 3V, by internal, positive supply
connected resistors.
Digital control of the CLC5526 is accomplished by a
3-bit parallel gain control input and a data valid pin to
latch the data. If the data is not latched, the DVGA is
transparent to gain control updates. All digital inputs
are TTL/CMOS compatible.
A shutdown input reduces the CLC5526 supply
currrent to a few mA. During shutdown, the input
termination is maintained and current attenuation
settings are held.
The CLC5526 operates over the industrial
temperature range of −40°C to +85°C. The part is
available in a 20-pin SSOP package.
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1999–2013, Texas Instruments Incorporated