The MAX2104 low-cost direct-conversion tuner IC is designed for use in digital direct-broadcast satellite (DBS) television set-top box units. Its direct-conversion architecture reduces system cost compared to devices with IFbased architectures. The MAX2104 directly converts L-band signals to baseband signals using a broadband I/Q downconverter. The operating frequency range extends from 925MHz to 2175MHz.
The IC includes an LNA gain control, I and Q downconverting mixers, lowpass filters with gain control and frequency control, a local oscillator (LO) buffer with a 90° quadrature network, and a charge-pump based PLL for frequency control. The MAX2104 also has an on-chip LO, requiring only an external varactor-tuned LC tank for operation. The output of the LO drives the internal quadrature generator and dual modulus prescaler. An on-chip crystal amplifier drives a reference divider as well as a buffer amplifier to drive off-chip circuitry. The MAX2104 is offered in a 48-pin TQFP-EP package.
Vcc to GND ............................................................-0.5V to +7V
All other pins to GND ...............................-0.3V to (VCC + 0.3V)
RF1+ to RF1-, RF2+ to RF2-, TANK+ to TANK-, IDC+ to IDC-,
QDC+ to QDC- .................................................................+/-2V
IOUT_,QOUT_ to GND Short Circuit Duration ......................10s
PSOU+, PSOUT- to GND Short Circuit Duration ...................10s
Continuous Current (any pin) .........................................20mA
Storage Temperature Range ......................-65°C to +150°C
Lead Temperature (soldering, 10s) ............................+300°C
Junction Temperature ................................................+150°C
Continuous Power Dissipation (TA = +70°C)
48-Pin TQFP ..............................................................1500mW
Derates above +70°C
48-Pin TQFP ...........................................................27mW/°C
Post a Buying Lead
Required Field 
