40MHz to 4GHz Linear Broadband Amplifiers
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1 MAX26 MAX26 0MHz to GHz Linear Broadband Amplifiers General Description The MAX26 MAX26 is a family of high-performance broadband gain blocks designed for use as a PA predriver, low-noise amplifier, or as a cascadable I amplifier with up to +.5dBm output power. These devices are suited for many applications that include cellular infrastructure, private or commercial microwave radios, and CATV or cable modems. The operating frequency range extends from 0MHz to 000MHz. The amplifier operates on a +V to a +5.25V supply with input and output ports internally matched to I. The device family is available in a pin-to-pin compatible, compact 2mm x mm TDFN lead-free package. Applications Cellular Infrastructure Microwave Radio Wireless LAN Test and Measurement Ordering Information appears at end of data sheet. Features Extremely Flat Frequency Response < 0.5dB, 1GHz to GHz Low Noise Figure: 2.0dB at f RFIN = 2.0GHz 0MHz to 000MHz Frequency Range Industry s Highest Max P IN Rating Large OIP Ranges MAX26/MAX26: +7dBm MAX26: +5.2dBm MAX26: +1.2dBm MAX26: +0dBm Output P1dB: +.5dBm (MAX26/MAX26) High Gain:.6dB Shutdown Mode (MAX26/MAX26/ MAX26/MAX26) Adjustable Bias Current for Improved OIP (MAX26).0V to 5.25V Supply Range Compact 2mm x mm TDFN Package Industry-High ESD Rating: 2.5kV HBM Typical Application Circuits V TO 5.25V V TO 5.25V 10µF 10nF 70pF 10µF 10nF 70pF MAX26 MAX26 MAX26 MAX µF RFIN N.C. V CC EN/BIAS RFOUT 2nH 0.01µF MAX µF RFIN V CC 21.5kI EN/BIAS RFOUT 2nH 0.01µF GND GND -609; Rev ; 5/
2 MAX26 MAX26 0MHz to GHz Linear Broadband Amplifiers Absolute Maximum Ratings V CC,EN/RBIAS, RFOUT to GND...-0.V to +6.0V Maximum Input Power (RFIN)... +dbm Continuous Power Dissipation (T A = +70NC) TDFN (derates.7mw/nc above +70NC)...mW Operating Temperature Range... -0NC to +85NC Junction Temperature...+0NC Storage Temperature Range NC to +0NC Lead Temperature (soldering, 10s)...+00NC Soldering Temperature (reflow) nc 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. Package Thermal Characteristics (Note 1) TDFN Junction-to-Ambient Thermal Resistance (B JA )...60NC/W Junction-to-Case Thermal Resistance (B JC )...11NC/W Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to DC Electrical Characteristics (MAX26/MAX26/MAX26/MAX26/MAX26 EV Kit, V CC = +5.0V, no RF input signals at RFIN, T A =-0NC to +85NC, unless otherwise noted. Typical values are at V RFOUT = +5V, T A = +25NC, unless otherwise noted.) (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS Supply Voltage DC voltage at RFOUT V Supply Current MAX26 69 MAX MAX MAX26, R BIAS = 21.5kI 81.5 MAX Shutdown Supply Current EN logic-low 7 FA RBIAS Minimum MAX26 10 ki ma AC Electrical Characteristics (MAX26/MAX26/MAX26/MAX26/MAX26 EV Kit, V CC = +5V, T A = -0NC to +85NC, unless otherwise noted. Typical values are at V RFOUT = +5V, T A = +25NC, unless otherwise noted.) (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS RFIN Frequency Range MHz Power Gain f RFIN = 0MHz (Note ) f RFIN = 000MHz (Note ) MAX26. MAX26.6 MAX26.6 MAX26.5 MAX26. MAX26.5 MAX26.1 MAX26.5 MAX26.0 MAX26.0 db Maxim Integrated 2
3 MAX26 MAX26 0MHz to GHz Linear Broadband Amplifiers AC Electrical Characteristic (continued) (MAX26/MAX26/MAX26/MAX26/MAX26 EV Kit, V CC = +5V, T A = -0NC to +85NC, unless otherwise noted. Typical values are at V RFOUT = +5V, T A = +25NC, unless otherwise noted.) (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS Gain Flatness Across Band Noise Figure OIP Output P1dB f RFIN = 0MHz < f RFOUT < 000MHz (Note ) f RFIN = 0MHz < f RFOUT < 000MHz (Note ) f RFIN = 00MHz (Note ) Input tones at 0MHz and 1MHz at -dbm/tone f RFIN = 0MHz (Note ) MAX MAX MAX26 0. MAX26 0. MAX MAX MAX MAX MAX MAX26 0. MAX MAX MAX MAX MAX MAX MAX MAX MAX MAX MAX26.2 MAX26.5 MAX26.6 MAX26.5 MAX26.5 Reverse Isolation 0MHz < f RFOUT < 000MHz db RFIN Input Return Loss 0MHz < f RFOUT < 0MHz 0MHz < f RFOUT < 000MHz MAX26 MAX26 MAX26 MAX26 MAX26 MAX26 MAX26 8 MAX26 8 MAX26 MAX26 db db dbm dbm db Maxim Integrated
4 MAX26 MAX26 0MHz to GHz Linear Broadband Amplifiers AC Electrical Characteristic (continued) (MAX26/MAX26/MAX26/MAX26/MAX26 EV Kit, V CC = +5V, T A = -0NC to +85NC, unless otherwise noted. Typical values are at V RFOUT = +5V, T A = +25NC, unless otherwise noted.) (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS RFOUT Output Return Loss 0MHz < f RFOUT < 0MHz 0MHz < f RFOUT < 000MHz MAX26 MAX26 MAX26 MAX26 MAX26 MAX26 MAX26 10 MAX26 10 MAX26 MAX26 Note 2: Min and max values are production tested at T A = +25NC. Min and max limits at T A = +85NC and T A = -0NC are guaranteed by design and characterization. Note : Min and max values are guaranteed by design and characterization at T A = +25NC. db Typical Operating Characteristics (MAX26/MAX26/MAX26/MAX26/MAX26 EV Kit, V RFOUT = +5V, T A = +25NC.) 70 MAX26 SUPPLY CURRENT vs. TEMPERATURE MAX26 toc01 5 MAX26 SUPPLY CURRENT vs. TEMPERATURE MAX26 toc02 2 MAX26 SUPPLY CURRENT vs. TEMPERATURE MAX26 toc0 SUPPLY CURRENT (ma) V CC = V V CC = V SUPPLY CURRENT (ma) V CC = V SUPPLY CURRENT (ma) V CC = V V CC = V V CC = V Maxim Integrated
5 MAX26 MAX26 0MHz to GHz Linear Broadband Amplifiers Typical Operating Characteristics (continued) (MAX26/MAX26/MAX26/MAX26/MAX26 EV Kit, V RFOUT = +5V, T A = +25NC.) SUPPLY CURRENT (ma) MAX26 SUPPLY CURRENT vs. TEMPERATURE R BIAS = 21.5kI V CC = V V CC = V MAX26 toc0 SUPPLY CURRENT (ma) MAX26 SUPPLY CURRENT vs. TEMPERATURE V CC = V V CC = V MAX26 toc05 MAX26 GAIN vs. FREQUENCY MEASUREMENTS DONE WITH DE-EMBEDDED EV KIT TRACE LOSSES MAX26 toc MAX26 GAIN vs. FREQUENCY MAX26 toc07 MAX26 GAIN vs. FREQUENCY MAX26 toc08 MAX26 GAIN vs. FREQUENCY R BIAS = 21.5kI MAX26 toc09 MEASUREMENTS DONE WITH DE-EMBEDDED EV KIT TRACE LOSSES MEASUREMENTS DONE WITH DE-EMBEDDED EV KIT TRACE LOSSES MEASUREMENTS DONE WITH DE-EMBEDDED EV KIT TRACE LOSSES MAX26 GAIN vs. FREQUENCY MAX26 toc10 MAX26 GAIN vs. TEMPERATURE V CC = V MAX26 toc11 MAX26 GAIN vs. TEMPERATURE V CC = V MAX26 toc V CC = V V CC = V MEASUREMENTS DONE WITH DE-EMBEDDED EV KIT TRACE LOSSES Maxim Integrated 5
6 MAX26 MAX26 0MHz to GHz Linear Broadband Amplifiers Typical Operating Characteristics (continued) (MAX26/MAX26/MAX26/MAX26/MAX26 EV Kit, V RFOUT = +5V, T A = +25NC.) MAX26 GAIN vs. TEMPERATURE V CC = V MAX26 toc MAX26 GAIN vs. TEMPERATURE R BIAS = 21.5kI V CC = V MAX26 toc MAX26 GAIN vs. TEMPERATURE V CC = V MAX26 toc V CC = V V CC = V V CC = V MAX26 OIP vs. FREQUENCY T A = -0 C MAX26 toc 0 5 MAX26 OIP vs. FREQUENCY T A = -0 C MAX26 toc 0 5 MAX26 OIP vs. FREQUENCY MAX26 toc OIP (dbm) 0 OIP (dbm) 0 OIP (dbm) 0 T A = -0 C OIP (dbm) MAX26 OIP vs. FREQUENCY T A = -0 C R BIAS = 21.5kI MAX26 toc OIP (dbm) MAX26 OIP vs. FREQUENCY T A = -0 C MAX26 toc OP1dB (dbm) MAX26 OP1dB vs. FREQUENCY T A = -0 C MAX26 toc21 Maxim Integrated 6
7 MAX26 MAX26 0MHz to GHz Linear Broadband Amplifiers Typical Operating Characteristics (continued) (MAX26/MAX26/MAX26/MAX26/MAX26 EV Kit, V RFOUT = +5V, T A = +25NC.) MAX26 OP1dB vs. FREQUENCY MAX26 toc22 MAX26 OP1dB vs. FREQUENCY MAX26 toc2 MAX26 OP1dB vs. FREQUENCY R BIAS = 21.5kI MAX26 toc2 OP1dB (dbm) T A = -0 C OP1dB (dbm) T A = -0 C OP1dB (dbm) 11 T A = -0 C 10 OP1dB (dbm) MAX26 OP1dB vs. FREQUENCY T A = -0 C MAX26 toc25 NOISE FIGURE (db) NOISE FIGURE vs. FREQUENCY.5 NOTE MAX MAX26 2. MAX MAX26 MAX k 10k MAX26 toc26 INPUT RETURN LOSS (db) INPUT RETURN LOSS vs. FREQUENCY MAX26 MAX26 MAX26 MAX26 MAX k 10k MAX26 toc27 0 OUTPUT RETURN LOSS vs. FREQUENCY MAX26 toc28 0 MAX26 R BIAS RESISTANCE vs. SUPPLY CURRENT MAX26 toc29 OUTPUT RETURN LOSS (db) MAX26 MAX26 MAX26 MAX26 MAX26 ICC (ma) k 10k 1 10 R BIAS (ki) Maxim Integrated 7
8 MAX26 MAX26 0MHz to GHz Linear Broadband Amplifiers Pin Configuration TOP VIEW GND RFOUT GND V CC MAX26 MAX26 + EP 1 2 GND RFIN GND EN/RBIAS TDFN Pin Description PIN NAME FUNCTION 1,, 6, 8 GND Ground. Connect to PCB ground plane. 2 RFIN RF Input. Connect to an RF source through a 0.01FF DC-blocking capacitor. Internally matched to I. EN/RBIAS 5 VCC 7 RFOUT EP Enable (MAX26/MAX26/MAX26/MAX26). Leave unconnected for normal operation or logiclow for disable mode operation. For applications that use the disable mode, it is recommended that the logic-high signal be derived from a high-impedance source such as an unterminated open-collector output or three-state (high-z) output. Logic-low should be a low-impedance source or a switch to ground capable of sinking 10FA. RBIAS (MAX26). Connect to a 21.5kI bias resistor to ground. The value can be adjusted to trade off supply current for OIP. See the Applications Information section for further detail. DC Supply Input. Place 70pF and 10nF decoupling capacitors as close to pin as possible. Also place a 10FF bulk capacitor on VCC; this must be a tantalum capacitor with ESR > 2Ω and can be placed further away. RF Output and DC Feed. Connect to DC supply through a 2nH inductor. Connect to output load through a 0.01FF DC-blocking capacitor. Exposed Pad. Connect to PCB ground plane by a x array of vias. Connect to ground lead (1,, 6, 8) land patterns and to layer 1 ground plane with thermal relief traces. Maxim Integrated 8
9 MAX26 MAX26 0MHz to GHz Linear Broadband Amplifiers Detailed Description Adjustable Bias Control for the MAX26 While the MAX26/MAX26/MAX26/MAX26 are fixed biased for ease of use, the MAX26 allows the current to be controlled by an external bias resistor connected from RBIAS (pin ) to ground. In this configuration, the MAX26 can be used over a range of current settings with an upper limit of ~0mA for an R BIAS of 10kI and a lower limit of 7.5mA for an R BIAS of 69kI. Values within this range allow optimized performance and power consumption for customer requirements. Applications Information Wideband Designs For LTE designs, the MAX261x family is ideally suited to minimize gain compensation over frequency while providing low noise and high OIP in a small (2mm x mm TDFN) but thermally efficient package. The same device can be used for multiple frequency bands without adjusting for gain slope degradation, a common artifact among phemt, InGaP, and GaAs gain blocks. Input Overload Handling As a result of its simple Darlington architecture and rugged bipolar process, the MAX261x family provides an industry-leading +dbm maximum input power rating. This inherently reduces the need for input protection circuitry while greatly minimizing the potential for damage to the device from intermittent RF surges. Ordering Information PART TEMP RANGE PIN-PACKAGE MAX26ETA+ -0NC to +85NC 8 TDFN-EP* MAX26ETA+ -0NC to +85NC 8 TDFN-EP* MAX26ETA+ -0NC to +85NC 8 TDFN-EP* MAX26ETA+ -0NC to +85NC 8 TDFN-EP* MAX26ETA/V+ -0NC to +85NC 8 TDFN-EP* MAX26ETA+ -0NC to +85NC 8 TDFN-EP* +Denotes a lead(pb)-free/rohs-compliant package. *EP = Exposed Pad. /V Denotes an automotive qualified part. Package Information For the latest package outline information and land patterns (footprints), go to Note that a +, #, or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 8 TDFN-EP T Maxim Integrated 9
10 MAX26 MAX26 0MHz to GHz Linear Broadband Amplifiers Revision History REVISION NUMBER REVISION DATE DESCRIPTION PAGES CHANGED 0 5/ Initial release / Revised Electrical Characteristics notes and added the automotive package to the Ordering Information 2 7/ Fixed Typical Operating Characteristics error and Pin Description 6, 8 5/ Updated Package Information 9, 9 For pricing, delivery, and ordering information, please contact Maxim Direct at , or visit Maxim Integrated s website at Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. Maxim Integrated Products, Inc. 10
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