AD8366
RECOMMENDED FOR NEW DESIGNSDC to 600 MHz, Dual-Digital Variable Gain Amplifiers
Part Details
- Matched pair of differential, digitally controlled VGAs
- Gain range: 4.5 dB to 20.25 dB
- 0.25 dB gain step size
- Operating frequency
- DC to 150 MHz (2 V p-p)
- 3 dB bandwidth: 600 MHz
- Noise figure (NF)
- 11.4 dB at 10 MHz at maximum gain
- 18 dB at 10 MHz at minimum gain
- OIP3: 45 dBm at 10 MHz
- HD2/HD3
- Better than −90 dBc for 2 V p-p output at 10 MHz at maximum gain
- Differential input and output
- Adjustable output common-mode
- Optional dc output offset correction
- Serial/parallel mode gain control
- Power-down feature
- Single 5 V supply operation
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.
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.
Applications
Documentation
Data Sheet 1
Technical Articles 1
Evaluation Design File 1
Frequently Asked Question 1
Device Drivers 1
Product Selection Guide 1
Analog Dialogue 1
Webcast 1
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 1
Evaluation Software 0
Tools & Simulations
Sys-Parameter Models for Keysight Genesys
Sys-Parameter models contain behavioral parameters, such as P1dB, IP3, gain, noise figure and return loss, which describe nonlinear and linear characteristics of a device.
Open ToolS-Parameter 1
ADIsimRF
ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.
Open ToolADIsimPLL™
ADIsimPLL enables the rapid and reliable evaluation of new high performance PLL products from ADI. It is the most comprehensive PLL Synthesizer design and simulation tool available today. Simulations performed include all key non-linear effects that are significant in affecting PLL performance. ADIsimPLL removes at least one iteration from the design process, thereby speeding the design- to-market.
Open ToolEvaluation Kits
AD8366 Evaluation Board
Resources
FPGA Mezzanine Card for Wireless Communications