500 MHz, 32 dB Linear-in-dB Variable Gain Amplifier

The LD-RW-N-0001-100 is a high performance, digitally controlled, variable-gain amplifier (DVGA). It has been designed for use in a broad range of mixed signal and digital communication applications where automatic-gain-control (AGC) is required to increase system dynamic range.

The device has differential input and output. The input impedance is user programable 200Ohm, 400Ohm, 1k, 2k.

The LD-RW-N-0001-100 maintains a 500 MHz bandwidth over its entire gain and attenuation range.

Digital control of the LD-RW-N-0001-100 is accomplished by digital inputs that are TTL/CMOS compatible.

The LD-RW-N-0001-100 is fabricated on an advanced 0.29mm BiCMOS process, operating on a single 3.3V power supply. A shutdown input reduces the supply current to a few mA.

The LD-RW-N-0001-100 operates over the industrial temperature range of -40°C to +85°C.

FEATURES

• 500 MHz bandwidth
• Differential input and output
• Gain control: serial/parallel
• Supply voltage: 3.3V

Key Specification:

• Dynamic Gain Control Range: from 0.25 to 4.0 V/V (+/-12dB with signed 8-bit word)
• Gain Range can be changed by 4 or -4.5dB
• Linear-in-dB Gain Control Scaled 0.1dB/LSB

Applications:

• HDD systems
• IF sampling receivers
• Infrared/CCD imaging
• High definition video

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