Click here for production status of specific part numbers. MAX3521 DOCSIS 3.0 Upstream Amplifier General Description Benefits and Features The MAX3521 is an integrated CATV upstream amplifier +5V Supply Voltage IC designed to exceed the DOCSIS 3.0 requirements. It Ultra-Low 25mW Dissipation in Transmit-Disable provides a maximum output power level 3dB higher than Mode the DOCSIS 3.0 specification for all modulation standards 63dB Gain-Control Range in 1dB Steps and channel configurations. The amplifier covers an 5MHz -65dBc Harmonic Distortion at 67dBmV Output to 85MHz input frequency range (275MHz, 3dB bandwidth). It is capable of transmitting four QPSK modulated carriers, Small 5mm x 5mm TQFN Package each at +61dBmV, simultaneously within this range. The Low Burst On/Off Transient gain is controlled in 1dB steps over a 63dB range using 275MHz, 3dB Bandwidth an SPI 3-wire interface. Multiple Power Modes for Optimal Battery Life The device operates from a single +5V supply. Four power codes are provided to allow maximum supply current to Applications be reduced as determined by distortion requirements. In addition, for each power code, supply current is DOCSIS 3.0 Plus Cable Modems and Gateways automatically reduced as gain is reduced while maintaining VOIP Modems distortion performance. The supply current drops to 5mA Set-Top Boxes between bursts to minimize power dissipation in transmit- disable mode. Control signal logic levels are 3.3V CMOS. The MAX3521 is the most recent addition to Maxims pin-compatible cable upstream amplifier family, which Ordering Information appears at end of data sheet. includes the MAX3518. The MAX3521 is available in a 20-pin TQFN package and operates over the extended Typical Application Circuit appears at end of data sheet. industrial temperature range (-40C to +85C). Functional Diagram GND GND GND V GND CC 20 19 18 17 16 GND 1 15 GND MAX3521 IN+ 2 14 OUT+ IN- 3 13 GND N.C.* 4 12 OUT- SERIAL INTERFACE GND 5 11 N.C.* 6 7 8 9 10 SCLK SDA CS TXEN V CC NOTE: N.C.* PINS MUST BE LEFT UNCONNECTED. 19-6475 Rev 3 9/17MAX3521 DOCSIS 3.0 Upstream Amplifier Absolute Maximum Ratings V to GND .........................................................-0.3V to +5.5V Operating Temperature Range ........................... -40C to +85C CC IN+, IN- ..................................................... -0.3V to (V + 0.3V) Junction Temperature ......................................................+150C CC OUT+, OUT- ............................................. -0.3V to (V + 3.6V) Storage Temperature Range ............................ -65C to +165C CC TXEN, SDA, SCLK, CS ........................................-0.3V to +4.2V Lead Temperature (soldering, 10s) .................................+300C RF Input Power ..............................................................+10dBm Soldering Temperature (reflow) .......................................+260C Continuous Power Dissipation (T = +70C) A (derate 34.5mW/C above T = +70C) ....................2750mW 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 (Typical Application Circuit as shown, V = 4.75V to 5.25V, V = 0V, TXEN = high, T = -40C to +85C, unless otherwise speci- CC GND A fied. Typical values are at V = 5V, T = +25C.) (Note 1) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V 4.75 5.25 V CC Gain code = 61, power code = 3 475 495 (34dB gain typ) Supply Current Gain code = 61, power code = 2 I 430 450 mA CC Transmit Mode (34dB gain typ) Gain code = 58, power code = 1 310 (31dB gain typ) Supply Current I TXEN = low 5 6.5 mA CC Transmit Disable Mode Input High Voltage V 2.0 3.6 V INH Input Low Voltage V 0.7 V INL Input High Current I 10 A BIASH Input Low Current I -10 A BIASL AC Electrical Characteristics (Typical Application Circuit as shown, V = 4.75V to 5.25V, V = 0V, TXEN = high, T = -40C to +85C, unless otherwise speci- CC GND A fied. Typical values are at V = 5V, T = +25C.) (Note 1) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Frequency Range f (Note 2) 5 85 MHz IN Gain code = 63 35 36 37 Gain code = 53 25 26 27 Voltage Gain, Z = 200, IN Gain code = 43 15 16 17 Z = 75, OUT A Gain code = 33 5 6 7 dB V Power Code = 3 Gain code = 23 -5 -4 -3 (Notes 3, 4) Gain code = 13 -15 -14 -13 Gain code = 03 -25 -24 -23 Maxim Integrated 2 www.maximintegrated.com