GENERAL DESCRIPTION

The AD8336 is a low noise, single-ended, linear-in-dB, general purpose variable gain amplifier, usable over a large range of supply voltages. It features an uncommitted preamplifier (preamp) with a usable gain range of 6 dB to 26 dB established by external resistors in the classical manner. The VGA gain range is 0 dB to 60 dB, and its absolute gain limits are −26 dB to +34 dB. When the preamplifier gain is adjusted for 12 dB, the combined 3 dB bandwidth of the preamp and VGA is 100 MHz, and the amplifier is fully usable to 80 MHz. With ±5 V supplies, the maximum output swing is 2 V p-p.

FEATURES

Low noise

Voltage noise: 3 nV/√Hz

Current noise: 3 pA/√Hz

Small signal BW: 115 MHz

Large signal BW: 2 V p-p = 80 MHz

Slew rate: 550 V/µs, 2 V p-p

Gain ranges (specified)

−14 dB to +46 dB, 0 dB to 60 dB

Gain scaling: 50 dB/V

DC-coupled

Single-ended input and output

Supplies: ±3 V to ±12 V

Temperature Range: −55°C to +125°C

Power

150 mW @ ±3 V, −55°C < T < +125°C

84 mW @ ±3 V, PWRA = 3 V

APPLICATIONS

Industrial process controls

High performance AGC systems

I/Q signal processing

Video

Industrial and medical ultrasound

Radar receivers