An overview of the
MAX2390 - MAX2393 / MAX2396 / MAX2400 (collectively referred to as MAX2390 series) is a fully integrated direct conversion receiver chip, suitable for w-cdma and TDSCDMA applications.
MAX2390 series receiver IC with more than 90 dB dynamic gain control range, in the LNA input and reference for the typical noise coefficient of 2.7 dB. Each receiver are included with the on chip output matching and two-stage gain control of the low current, low noise amplifier (LNA). Zero IF demodulator with differential circuit topology structure, can minimize the LO leakage at the input to the receiver. Channel selection in the integrated chip receiver baseband part of the low pass filter. AGC choose to have more than 50 db gain control. LO orthogonal generator to book via binary frequency standard device in the finish. Baseband I/Q channels of DC offset to eliminate use in DC servo loop is complete. For in the shortest possible time rapid correction of large DC offset transient, eliminated by optimizing the DC offset time constant of the circuit to realize fast settling time.
MAX2390 series using 3 line serial bus configuration different receiver models. Including a/SHDN pin at the same time, in order to realize the device completely shut off. The receiver adopts advanced high frequency SiGe BiCMOS process manufacturing. IC work from + 2.7 V to + 3.3 V single power supply, small pins, leadless QFN - EP encapsulating (5 mm x 5 mm).
The key features
Direct conversion receiver, a single chip
Without external IF SAW + IF AGC + I/Q demodulator
Comply with all of the 3 GPP receiver standard specification, Eb/No with at least 3 db margin
Work from + 2.7 V to + 3.3 V single power supply
More than 90 db RF + baseband gain control
Channel selectivity for more than 40 db
Receiver current consumption of about 32 ma material
On chip integrated DC offset elimination circuit
Compatible with all kinds of CMOS logic level
Application/use
IMT2000 phone
Td-scdma handsets
UMTS mobile phones
WCDMA band II (PCS) mobile phones
WCDMA TDD phone
