MAX2645 19-1759 Rev 1 8/03 3.4GHz to 3.8GHz SiGe Low-Noise Amplifier/PA Predriver General Description Features The MAX2645 is a versatile, high-linearity, low-noise 3.4GHz to 3.8GHz Frequency Range amplifier designed for 3.4GHz to 3.8GHz wireless local LNA Performance (High/Low-Gain Modes) loop (WLL), wireless broadband access, and digital Gain: +14.4dB/-9.7dB microwave radio applications. The device features an externally adjustable bias control, set with a single resis- NF: 2.3dB/15.5dB tor, that allows the user to meet minimum linearity require- Input IP3: +4dBm/+13dBm ments while minimizing current consumption. The Supply Current: 9.2mA/2.7mA amplifiers high-gain, low-noise performance and Highly Versatile Application adjustable input third-order intercept (IP3) allow it to be Receive Path 1st and 2nd Stage LNA used as a low-noise amplifier (LNA) in the receive path, a Transmit PA Predriver PA predriver in the transmit path, or as an LO buffer. LO Buffer The MAX2645 features a logic-level gain control that pro- Adjustable IP3 and Supply Current vides a 25dB step reduction in gain, which improves IP3 performance for operation during high input signal level 0.1A Supply Current in Shutdown Mode conditions. Supply current is reduced from 9mA in high- gain mode to 3mA in low-gain mode. The device also +3.0V to +5.5V Single-Supply Operation includes a logic-controlled shutdown mode, which 10-Pin MAX-EP Package (5.0mm x 3.0mm) reduces supply current to 0.1A. The MAX2645 operates from a +3V to +5.5V supply and is offered in the miniature 10-pin MAX package (5mm 3mm) with an exposed Ordering Information paddle. Its performance has been optimized for use with the MAX2683/MAX2684 3.5GHz SiGe mixers to provide a PART TEMP RANGE PIN-PACKAGE complete high-performance, front-end solution for 3.5GHz MAX2645EUB -40C to +85C 10 MAX-EP* applications. *EP = exposed paddle. Applications Wireless Local Loop Pin Configuration appears at end of data sheet. Wireless Broadband Access Digital Microwave Radios Typical Operating Circuit RADIAL STUB APPLICATION GAIN NF IIP3 (dB) (dB) (dBm) CIRCUIT +4/+13 LNA, LOW NF 14.4/-9.7 2.3/15.5 V CC 14.9/-10.7 2.6/16 +10/+15.5 LNA, HIGH IP3 15.2/-9.7 PA PREDRIVER 2.6/16 +11.8/+16.2 LOGIC GAIN STEP BIAS AND POWER INPUTS SHUTDOWN MANAGEMENT T LINE R BIAS MAX2645 C1 RF RF HIGH INPUT GAIN OUTPUT RFIN 3.5GHz Z1 LOW GAIN GND 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 AVAILABLE3.4GHz to 3.8GHz SiGe Low-Noise Amplifier/PA Predriver ABSOLUTE MAXIMUM RATINGS V to GND...........................................................-0.3V to +6.0V Operating Temperature Range ...........................-40C to +85C CC GAIN, SHDN, RFOUT to GND .....................0.3V to (V + 0.3V) Junction Temperature......................................................+150C CC RFIN Input Power (50 source)........................................16dBm Storage Temperature Range .............................-65C to +150C Minimum R ....................................................................10k Lead Temperature (soldering, 10s) .................................+300C BIAS Continuous Power Dissipation (T = +70C) A 10-Pin MAX-EP (derate 10.3mW/C above T = +70C) ....................825mW A 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 = +3.0V to +5.5V, GAIN = SHDN = V , R = 20k , no RF signals applied, T = -40C to +85C. Typical values are at V CC CC BIAS A CC = +3.3V, T = +25C, unless otherwise indicated.) (Note 1) A PARAMETER CONDITIONS MIN TYP MAX UNITS Supply Voltage 3.0 5.5 V GAIN = V 9.2 10.9 CC R = 20k , BIAS T = +25C A GAIN = GND 2.7 3.9 GAIN = V 11.6 R = 20k , CC BIAS Operating Supply Current mA T = -40C to +85C A GAIN = GND 4.0 GAIN = V 12 R = 15k , CC BIAS T = +25C A GAIN = GND 3.6 Shutdown Supply Current SHDN = GND 0.1 2 A Input Logic Voltage High GAIN, SHDN 2.0 V Input Logic Voltage Low GAIN, SHDN 0.6 V GAIN = SHDN = V 1 CC Input Logic Bias Current A GAIN = SHDN = GND -10 2 MAX2645