Analog Devices Intros New AD8337 DC-Coupled Amplifier
Analog Devices Inc. (ADI, Wilmington, MA) introduced its new AD8337 dc-coupled variable gain amplifier (VGA) for industrial and instrumentation applications, which delivers dc and ac electrical performance that make it suitable for a wide range of high-channel-count industrial and instrumentation applications, such as positron emission tomography medical imaging, industrial ultrasound, radio frequency test instruments, and high-performance automatic gain control systems.
The AD8337 provides a low-noise (2.2 nV/rtHz), single-ended, linear-in-dB VGA element at frequencies up to 250 MHz; 24 dB of gain range and bandwidth uniformity across the entire gain range; precise linear-in-dB scaling of 20 dB/V; 250 MHz of bandwidth operation; a high slew rate of 475 V/µsec in a 2 V step; power consumption of 78 mW at ±2.5 V supplies; dual-supply operation; an output-referred dc offset voltage of less than 20 mV over the entire gain control voltage range of 24 dB; and an integrated pre-amplifier that can be configured with external resistors for any gain greater than two.
The AD8337 is sampling now and is available in a 3 mm x 3 mm, eight-pin, lead-frame, chip-scale package (LFCSP). The VGA is priced at $2.49 per unit in 1,000-piece quantities.
