MAXIM MAX2312EEI

The MAX2310/MAX2312/MAX2314/MAX2316 are IF receivers designed for dual-band, dual-mode, and single-mode N-CDMA and W-CDMA cellular phone systems. The signal path consists of a variable gain amplifier (VGA) and 1/Ω demodulator. The devices feature guaranteed +2.7V operation, a dynamic range of over 110dB, and high input IP3 (-33dBm at 35dB gain, 1.7dBm at -35dB).

Unlike similar devices, the MAX2310 family of receivers includes dual oscillators and synthesizers to form a self-contained IF subsystem. The synthesizer’s reference and RF dividers are fully programmable through a 3-wire serial bus, enabling dual-band system architectures using any common reference and IF frequency. The differential baseband outputs have enough bandwidth to suit both N-CDMA and W-CDMA systems, and offer saturated output levels of 2.7Vp-p at a low +2.75V supply voltage. Including the low-noise voltage-controlled oscillator (VCO) and synthesizer, the MAX2310 draws only 26mA from a +2.75V supply in CDMA (differential IF) mode.

The MAX2310/MAX2312/MAX2314/MAX2316 are available in 28-pin QSOP packages.

• Complete IF Subsystem Includes VCO and Synthesizer
• Supports Dual-Band, Triple-Mode Operation
• VGA with >100dB Gain Control
• Quadrature Demodulator
• High Output Level (2.7V)
• Programmable Charge-Pump Current
• Supports Any IF Frequency Between 40MHz and 300MHz
• 3-Wire Programmable Interface
• Low Supply Voltage (+2.7V)

• Single/Dual/Triple-Mode CDMA Handsets
• Globalstar Dual-Mode Handsets
• Wireless Data Links
• Tetra Direct-Conversion Receivers
• Wireless Local Loop (WLL)