The AD8366 is a matched pair of fully differential, low noise and low distortion, digitally programmable variable gain amplifiers (VGAs). The gain of each amplifier can be programmed separately or simultaneously over a range of 4.5 dB to 20.25 dB in steps of 0.25 dB. The amplifier offers flat frequency performance from dc to 70 MHz, independent of gain code. Baseband I/Q receivers Diversity receivers Wideband ADC drivers
The AD8366 offers excellent spurious-free dynamic range, suitable for driving high resolution analog-to-digital converters (ADCs). The NF at maximum gain is 11.4 dB at 10 MHz and increases ~2 dB for every 4 dB decrease in gain. Over the entire gain range, the HD3/HD2 are better than −90 dBc for 2 V p-p at the output at 10 MHz into 200 Ω. The two-tone intermodulation distortion of −90 dBc into 200 Ω translates to an OIP3 of 45 dBm (38 dBVrms). The differential input impedance of 200 Ω provides a well-defined termination. The differential output has a low impedance of ~25 Ω.
The output common-mode voltage defaults to VPOS/2 but can be programmed via the VCMA and VCMB pins over a range of voltages. The input common-mode voltage also defaults to VPOS/2 but can be driven down to 1.5 V. A built-in, dc offset compensation loop can be used to eliminate dc offsets from prior stages in the signal chain. This loop can also be disabled if dc-coupled operation is desired.
The digital interface allows for parallel or serial mode gain programming. The AD8366 operates from a 4.75 V to 5.25 V supply and consumes typically 180 mA. When disabled, the part consumes roughly 3 mA. The AD8366 is fabricated using Analog Devices, Inc., advanced silicon-germanium bipolar process, and it is available in a 32-lead exposed paddle LFCSP package. Performance is specified over the −40°C to +85°C temperature range.
Features and BenefitsDC to 150 MHz (2 V p-p) 3 dB bandwidth: 600 MHz 11.4 dB at 10 MHz at maximum gain 18 dB at 10 MHz at minimum gain Better than −90 dBc for 2 V p-p output at 10 MHz at maximum gain | RF & MicrowaveS-Parameters
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| Document | note |
| AD8366: DC to 600 MHz, Dual-Digital Variable Gain Amplifiers Data Sheet (Rev. A) | PDF 513 kB |
| Document | note |
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|---|---|---|---|---|---|
| AD8366ACPZ-R7 Production | 32 ld LFCSP (5x5x.85mm) w/2.7exposed pad | REEL 1500 | -40 to 85C | 0 | 6.57 | Y |
| Part Number | Description | Price | RoHS |
|---|---|---|---|
| AD8366-EVALZ | Evaluation Board | 99 | Y |
