GENERAL DESCRIPTION

The AD8330¹ is a wideband variable gain amplifier for applications requiring a fully differential signal path, low noise, well-defined gain, and moderately low distortion, from dc to 150 MHz. The input pins can also be driven from a single-ended source. The peak differential input is ±2 V, allowing sine wave operation at 1 V rms with generous headroom. The output pins can drive single-sided loads essentially rail-to-rail. The differential output resistance is 150 Ω.

FEATURES

Fully differential signal path, also used with single-sided signals

Inputs from 0.3 mV to 1 V rms, rail-to-rail outputs

Differential RIN= 1 kΩ; ROUT(each output) 75 Ω

Automatic offset compensation (optional)

Linear-in-dB and linear-in-magnitude gain modes

   0 dB to 50 dB, for 0 V < VDBS< 1.5 V (30 mV/dB)

Inverted gain mode: 50 dB to 0 dB at −30 mV/dB

×0.03 to ×10 nominal gain for 15 mV < VMAG< 5 V

Constant bandwidth: 150 MHz at all gains

Low noise: 5 nV/√Hz typical at maximum gain

Low distortion: ≤−62 dBc typical

Low power: 20 mA typical at VSof 2.7 V to 6 V

Available in a space-saving, 3 mm × 3 mm LFCSP package



APPLICATIONS

Pre-ADC signal conditioning

75 Ω cable driving adjust

AGC amplifiers