The F0448 is a 3.3GHz to 4.2GHz Dual RF digital variable gain amplifier (DVGA) designed for use in receivers. This Dual RF DVGA provides two independent receiver paths each with 13dB typical maximum gain and 6dB noise figure designed to operate with a single +5V supply. For each path, gain control is split into 3 separate attenuators; DSA0 a single 6dB step using a single control pin, DSA1 a 23dB SPI-controlled gain adjustment in 1dB steps, and DSA2 includes 18dB attenuation in 6dB steps controlled using two control pins. F0448 offers +37dBm nominal output IP3 using 220mA total ICC. This device is packaged in a 6 x 6 mm, 36-QFN with 50Ω single-ended RF input and RF output impedances for ease of integration.
Features
- RF frequency range: 3.3GHz to 4.2GHz
- Dual path RF amp and DSAs for Diversity / MIMO receivers
- < 2dB overshoot between DSA transitions
- 13dB typical max gain at 3.6GHz
- DSA0: Single 6dB coarse step
- DSA1: 23dB total gain range in 1dB steps
- DSA2: 18dB gain range in 6dB steps
- +37dBm OIP3 at 3.6GHz
- 6dB noise figure at 3.6GHz
- +5V supply voltage
- ICC = 220mA
- Independent standby: 7mA standby current
- SPI interface for DSA1
- 1-bit control for DSA0
- 2-bit control for DSA2
- 50Ω input and output impedance
- Broadband, internally matched
- Temperature range: -40°C to +105°C
- 6 x 6 mm, 36-QFN package