EVALUATION KIT AVAILABLE MAX12000 1575MHz GPS Front-End Amplifier General Description Features The MAX12000 GPS front-end amplifier IC is designed First Amp Noise Figure*: 1.0dB for marine GPS satellite navigation antenna modules or High Gain**: 34.8dB for any application that needs to compensate for cable 3.4dB Gain Step losses from the GPS antenna to receiver. Two uncondi- tionally stable low-noise amplifier stages provide the high Integrated 50 Output Matching gain and integrated I/O matching to minimize the need for 3.0V to 5.5V Supply Voltage Range external matching components and eliminate the need Small, Low-Cost Package (3mm x 3mm) for additional gain stages. The MAX12000 features the option to place a bandpass ceramic or SAW filter between ESD Protected to 1kV Human Body Model the two amplifier stages to provide a narrow-band output to further improve the noise performance of the GPS *Without external input impedance match. receiver. Additionally, a 3.4dB gain step is provided to **First amplifier input is impedance matched (S = -10dB). 11 compensate for cable loss variation between different Second amplifier set to high gain. Amplifiers cascaded without applications. interstage filter. The MAX12000 is designed to operate at the GPS fre- quency of 1575MHz with a 34.8dB typical cascaded gain Ordering Information and a 25mA supply current. The two LNA stages allow the use of a wide range of GPS filter types for maximum PIN- PART TEMP RANGE flexibility in system design. The final RF output pin, which PACKAGE drives the cable to the GPS receiver, is also the pow- MAX12000ETB+ -40C to +85C 10 TDFN er-supply connection that accepts a DC supply in the +Denotes a lead(Pb)-free/RoHS-compliant package. +3.0V to +5.5V range. Alternatively, the DC supply can be applied to pin 4. The GPS front-end amplifier is designed on a low-noise, advanced SiGe process and is available in a lead-free, 10-pin TDFN surface-mount package (3mm x 3mm). Typical Operating Circuit appears at end of data sheet. Applications Marine GPS Receivers Pin Configuration/Functional Diagram TOP VIEW + RFIN2 1 10 RFOUT1 MAX12000 GND 2 9 GND AMP 2 GND 3 8 GND AMP 1 EXTCAP/ALT V 4 7 GAIN SELECT CC DC RFOUT2/V RFIN1 CC 5 6 GENERATION TDFN 19-4021 Rev 1 9/14MAX12000 1575MHz GPS Front-End Amplifier Absolute Maximum Ratings RFOUT1, RFOUT2, EXTCAP to GND ..... -0.3V to (V + 0.5V) Continuous Power Dissipation (T = +70C) CC A RFIN1 Input Power (50 source) ...................................+15dBm 10-Pin TDFN (derate 18.5mW/C above +70C) ......1481mW RFIN1 to GND ......................................................-0.3V to +0.3V Operating Ambient Temperature Range ........... -40C to +105C RFIN2 to GND ......................................................-0.3V to +1.0V Maximum Junction Temperature .....................................+150C GAIN SELECT to GND ............................ -0.3V to (V + 0.3V) Storage Temperature Range ............................ -65C to +150C CC Lead Temperature (soldering, 10s) .................................+300C 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, T = -40C to +85C. Typical values are at +5.0V and at T = +25C. Pin 7 open, unless otherwise noted.) CC A A (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V 3.0 5.5 V CC T = +25C 15.0 25 30.2 A Supply Current I mA CC T = -40C to 105C (Note 2) 33 A Gain-Select Input Current I V = 0V 20 100 A IL IL AC Electrical Characteristics (V = +3.0V to +5.5V, P = -40dBm, f = 1575MHz, T = -40C to +85C. Typical values are at +5.0V and at T = +25C. Input CC IN IN A A matched to 50, load = 50 , pin 7 open, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operation Frequency f 1575 MHz RF 50 source with no input match (Note 3) 15.0 16.7 18.5 AMP 1 Gain S dB 21 50 source with input match 17.8 AMP 1 Gain Variation Over 0.3 dB Temperature AMP 1 Noise Figure NF No input match (Notes 3, 4) 1 1.3 dB AMP 1 Input Third-Order Two tones at 1574.5MHz and 1575.5MHz, IIP3 -12 dBm Intercept Point -35dBm per tone AMP 1 Input 1dB Compression 50 source with no input match (Note 3) -19 dBm Point AMP 1 Input Return Loss S No input match (Note 3) -4.4 dB 11 AMP 1 Output Return Loss S -14.5 dB 22 AMP 1 Reverse Isolation S -33 dB 12 AMP 2 Gain S 15.0 17 19.6 dB 21 AMP 2 Gain Step Gain change when pin 7 is shorted to GND -2.8 -3.4 -4.0 dB AMP 2 Gain Variation Over 1 dB Temperature AMP 2 Noise Figure NF (Note 4) 2.0 2.4 dB AMP 2 Output Third-Order Two tones at 1574.5MHz and 1575.5MHz, OIP3 16.0 dBm Intercept Point -30dBm per tone AMP 2 Output 1dB Compression 1.5 5.3 dBm Point Maxim Integrated 2 www.maximintegrated.com