SA2400A Description
The SA2400A is a fully integrated single IC RF transceiver designed for 2.45 GHz wireless LAN (WLAN) applications. It is a direct conversion radio architecture that is fabricated on an advanced 30 GHz fT BiCMOS process. The SA2400A bines a receiver, transmitter, and LO generation into a single IC.
SA2400A Key Features
- A 79 dB adjustable gain range direct conversion zero IF receiver
- Front-end LNA with two internal gain states
- A fast on-chip closed loop posite RF and IF AGC with zoomed analog RSSI output and 8 µs settling time
- Quadrature downconverters from 2.45 GHz RF directly to zero IF
- A fractional-N frequency synthesizer with on-chip VCO and XO
- A 3-wire bus for control of most blocks
- An additional high speed 3-wire bus for full control of Rx-Gain and
SA2400A Applications
- An I/Q upconverter from baseband directly to 2.45 GHz, with
- Wide band IQ modulator producing better than 14% EVM for 11 Msymbols/s QPSK modulation
- Integrated reconstruction and spectral shaping filters at I and Q modulation input that is driven by an external D/A. High mon mode rejection to input ground bo
- FIR-DACs for digital I/Q input feeding the analog signal path and including additional filtering for spectral shaping
- 2.45 GHz power amplifier driver with +8 dBm maximum output, 15 dB adjustable gain in 1 dB steps and a second switched output at -1.5 dBm power level with simila
- pletely on-chip calibration for Carrier Leakage pensation
- Internal power ramping with 2 µs delay and 0.5 µs ramp-up time