Product Brief
VGA integrates five circuit functions to save space in wireless infrastructure transceivers
Ismini Scouras8/31/2010 9:28 AM EDT
Comment
agk
The dual VGA variable gain amplifier is unique with its features like 1 db ...
Sunnyvale, Calif.—Maxim Integrated Products has introduced the MAX2063, calling it the industry's only fully programmable, multi-state, dual-channel, digital IF/RF variable-gain amplifier (VGA).
The MAX2063 provides "rapid-fire" gain selection for four customized attenuation states per path, fast 25ns digital switching, and low digital VGA amplitude overshoot/undershoot. It is intended for the "fast-attack" automatic gain control (AGC) circuits found in all 2.5G, 3G, 4G wireless infrastructure transceivers, including GSM/EDGE, CDMA, WCDMA, LTE, and WiMAX applications.
Key highlights:
- Independently controlled dual paths
- 50MHz to 1000MHz RF frequency range
- 21.3dB (typ) maximum gain
- 0.25dB gain flatness over 100MHz bandwidth
- 31dB gain range
- 58dB path isolation at 200MHz
- Supports four "rapid fire" preprogrammed attenuator states
- Excellent linearity at 200MHz
- +41dBm OIP3
- +56dBm OIP2
- +19dBm Output 1dB compression point
- 5.6dB typical noise figure
- 25ns digital switching time
- Very low distortion VGA amplitude overshoot/undershoot of 0.05dB
- Single +5V supply (or +3.3V Operation)
- Amplifier power-down mode for TDD applications
Pricing: Starts at $6.90 (1000-up, FOB USA).
Availability: Now.
Datasheet: Click here.
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agk
9/1/2010 9:49 AM EDT
The dual VGA variable gain amplifier is unique with its features like 1 db attenuation steps over 31 db using a 5 bit control input with a 0.25 db gain flateness over 100 Mhz BW. This chip also has a four step rapid gain control which is programmable by the designer using SPI interface plus a 2 bit digital input. The BW 50 to 1000 Mhz at a noise figure of 5.6 db with 2 independant VGA's makes it very attractive and compact for various RF applications. This chip has a power save feature where the supply can be reduced to 3.3 volts and usefull feature for mobile applications. over all this is a great design by Maxim designers in the field of wide band RF amplifiers. Soon we may expect these devices available at a lower noise figure from Maxim semiconductors.
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