RF to digital receive modules target base-station designs

Linear Technology has released the LTM9004 and LTM9005, two RF-to-digital uModule® devices for use in the receive channel in cellular base stations, including 3G and 4G base station receivers (WCDMA, TD-SCDMA, LTE, etc.) and smart antenna WiMAX base stations. The uModule receivers integrate the RF mixer/demodulator, amplifiers, passive filtering and 14-bit, 125Msps ADCs in one 22mm × 15mm package. The LTM9004 implements a direct conversion architecture with an I/Q demodulator, low-pass filter and a dual ADC.  The LTM9005 implements an IF-sampling architecture with a downconverting mixer, SAW filter and a single ADC.  


Key Features:

• Fully Integrated RF-to-Digital Receivers for Base Station Applications
• 14-Bit, 125Msps Low Power ADC
• 22mm x 15mm LGA Package

Direct Conversion Architecture (LTM9004)

• 800MHz to 2.7GHz RF Input Range
• I/Q Demodulation & Dual ADC
• DC-Coupled, Fixed Gain, Fixed Cutoff LPF
• 5V & 3V Supplies, 1.8W Total Power Consumption

IF-Sampling Architecture (LTM9005)

• 400MHz to 3.8GHz RF Input Range
• Continuous 20dB Attenuation Range
• 20MHz SAW Filter, 140MHz IF
• 3.3V Supply, 1.3W Total Power Consumption

Datasheets:
LTM9004
LTM9005