MAX2335 19-0492 Rev 0 10/05 450MHz CDMA/OFDM LNA/Mixer General Description Features The MAX2335 RF front-end receiver IC is designed for 1.5dB LNA Noise Figure CDMA and OFDM applications in the 450MHz band. 16dB LNA Gain The MAX2335 includes a low-noise amplifier (LNA) with 2.1dB Cascaded Noise Figure adjustable IIP3 to minimize desensitization due to cross- modulation in the presence of a large interfering signal. Adjustable LNA IIP3 The mixer features differential IF outputs and is LO Output Buffer for Transmitter designed for high linearity and low noise, which is well suited for CDMA and OFDM applications. LO Frequency Divider An on-chip frequency divider is included to allow the Small 5mm x 5mm, 28-Pin (Lead-Free) TQFN use of a standard 1GHz VCO. Alternatively, the divider Package can be bypassed for use with a lower-frequency VCO. The MAX2335 is available in a 28-pin TQFN package with exposed paddle and is specified for the -40C to Ordering Information +85C extended temperature range. The device is also offered in a lead-free package. PKG PART TEMP RANGE PIN-PACKAGE CODE 28 Thin QFN-EP* MAX2335ETI -40C to +85C T2855-3 (5mm x 5mm) 28 Thin QFN-EP* MAX2335ETI+ -40C to +85C T2855+3 (5mm x 5mm) *EP = Exposed paddle. +Denotes lead-free package. Pin Configuration/ Applications Functional Diagram 450MHz-Band, WCDMA, IS-95, IS-2000, OFDM, TOP VIEW Wireless Data Links 21 20 19 18 17 16 15 MIXIN 14 22 N.C. I.C. 23 13 LO OUT MAX2335 24 12 I.C. N.C. 25 11 N.C. N.C. V 26 2 10 LO IN CC EP N.C. 27 9 LO/2 28 8 N.C. LNAOUT + 12 3 45 6 7 THIN QFN 5mm x 5mm Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE DEGEN R BIAS R LNA IF CDMA+ GND IF CDMA- LNAIN N.C. MODEO BUFFEN MODE1 V CC MODE2 V CC450MHz CDMA/OFDM LNA/Mixer ABSOLUTE MAXIMUM RATINGS V to GND...........................................................-0.3V to +4.3V Operating Temperature Range ...........................-40C to +85C CC All Other Pins to GND.................................-0.3V to (V + 0.3V) Junction Temperature......................................................+150C CC AC Input Pins (LNAIN, LO IN, MIXIN) to GND ...............1V Peak Storage Temperature Range .............................-65C to +150C Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) .................................+300C A 28-Pin Thin QFN (derate 34.5mW/C above +70C) ...........2.7W Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. CAUTION ESD SENSITIVE DEVICE DC ELECTRICAL CHARACTERISTICS (V = +2.9V to +3.3V, R = 18k , R = 24k , BUFFEN = LOW, LO/2 = HIGH, T = -40C to +85C, unless otherwise noted. CC BIAS LNA A Typical values are at V = +2.9V, LOW = 0V, HIGH = +3.0V, T = +25C, unless otherwise noted.) (Note 1) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS HGHL mode (MODE 2:0 = 111) 32 38 Operating Supply Current I HGLL mode (MODE 2:0 = 101) 24 29 mA CC LG mode (MODE 2:0 = 011) 27 31 Shutdown Supply Current I Shutdown mode (MODE 2:0 = 000) 0.2 10 A CC LO Buffer Supply Current I Addition for BUFFEN = HIGH 7 13 mA CC Digital Input-Logic High V 2V IH Digital Input-Logic Low V 0.6 V IL Digital Input Current (Logic-High) I 5A IH Digital Input Current (Logic-Low) I -25 A IL AC ELECTRICAL CHARACTERISTICS (MAX2335 EV Kit, V = +2.9V to +3.3V, f = f = 465MHz, f = 110MHz, f = 2 x (f + f ), 50 system impedance, CC LNAIN MIXIN IF LO MIXIN IF R = 18k , R = 24k , cascaded performance includes 2dB interstage filter loss, T = -40C to +85C, unless otherwise BIAS LNA A noted. Typical values are at V = +2.9V, P = -7dBm, LOW = 0V, HIGH = +3.0V, T = +25C, unless otherwise noted.) CC LO IN A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS OVERALL PERFORMANCE RF Frequency Range f 420 to 470 MHz RF LO Frequency Range f After optional LO/2 500 to 660 MHz LO IF Frequency Range f 80 to 190 MHz IF LO Input Power (Note 2) -7 -3 0 dBm LO Buffer Output Power BUFFEN = HIGH -10 -6 dBm All modes, all active ports, including Return Loss 10 dB 2-element matching network, if necessary CASCADED PERFORMANCE HIGH-GAIN, HIGH-LINEARITY MODE (MODE 2:0 = 111) Gain G (Note 1) 23.0 27 31.5 dB Noise Figure NF Includ i ng off-ch ip m atching , T = + 25C ( N ote 2) 2.2 2.6 dB A Input Third-Order Intercept Point IIP3 T = + 25C (Notes 1, 3) -14 -11.5 dBm A 2 MAX2335