MAXIM MAX2472 MAX2473 数据手册

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500MHz to 2500MHz VCO Buffer Amplifiers MAX2472/MAX2473
(Typical Operating Circuits, VCC = +3V, PIN = -25dBm, IN driven from a 50Ω source, OUT1 and OUT2 LC matched to 50Ω, TA = +25°C, unless otherwise noted.) PARAMETER Reverse Isolation (IN to OUT1) SYMBOL fIN = 600MHz S122 fIN = 900MHz fIN = 1900MHz fIN = 2400MHz Noise Figure Isolation (OUT1 to OUT2) Harmonic Suppression NF fIN = 900MHz fIN = 1900MHz fIN = 900MHz POUT = -5dBm, fIN = 900MHz CONDITIONS MIN TYP 54 49 34 30 9.5 10.2 24 -25 dB dB dBc dB MAX UNITS
MAX2472/MAX2473
Ordering Information
PART TEMP. RANGE PINPACKAGE 6 SOT23-6 6 SOT23-6 SOT TOP MARK AAAZ AABA
MAX2472EUT-T -40°C to +85°C MAX2473EUT-T -40°C to +85°C
19-1466; Rev 0; 6/99
ANUAL N KIT M EET IO T A U EVAL TA SH WS DA FOLLO
500MHz to 2500MHz VCO Buffer Amplifiers
Features
o +2.7V to +5.5V Supply Range o 500MHz to 2500MHz Input Frequency Range o High Reverse Isolation: 49dB at 900MHz o Dual Open-Collector Outputs (MAX2472) o Adjustable -10dBm to -2dBm Output Power Control (MAX2473) o High Input Impedance: >250Ω at 900MHz o Ultra-Small SOT23-6 Package
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_______________________________________________________________________MHz VCO Buffer Amplifiers
AC ELECTRICAL CHARACTERISTICS—MAX2472 (continued)
General Description
The MAX2472/MAX2473 are flexible, wideband, highreverse-isolation buffer amplifiers. The MAX2472 has dual open-collector outputs capable of delivering -5dBm into 50 Ω while maintaining harmonic suppression below -25dBc. The MAX2473 has a single open-collector output with a bias control pin to vary output power from -10dBm to -2dBm while maintaining harmonic suppression below -25dBc. The MAX2472/MAX2473’s combination of high reverse isolation and low supply current makes them ideal for applications requiring high performance with low power. They feature high input impedance and open-collector outputs for maximum flexibility, enabling them to be used with a variety of oscillator topologies. Both the MAX2472 and MAX2473 operate from a single +2.7V to +5.5V supply. With VCC = +3.0V and -25dBm input power, the MAX2472 consumes 5.2mA, while the MAX2473 consumes only 2.7mA. Both devices are available in a tiny 6-pin SOT23 package requiring minimal board space.
DC ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +5.5V, PIN = -25dBm, IN driven from a 50Ω source, OUT_ LC-matched to 50Ω, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +3V, TA = +25°C.) (Note 1) PARAMETER Input Voltage Range SYMBOL VCC MAX2472 MAX2473, RBIAS = 23kΩ Supply Current ICC MAX2473, RBIAS = 11kΩ MAX2472 No drive MAX2473, RBIAS = 23kΩ MAX2473, RBIAS = 11kΩ CONDITIONS MIN 2.7 5.2 2.7 4.8 5.1 2.5 4.3 mA TYP MAX 5.5 8.0 UNITS V
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.
Applications
Cellular and PCS Mobile Phones Private Mobile Radios ISM-Band Applications IF/RF Oscillators General-Purpose Buffers/Amplifiers
IN
Functional Diagrams
VCC BIAS OUT2
MAX2472
OUT1
Typical Operating Circuits appear at end of data sheet.
GND
GND
Pin Configuration
TOP VIEW
OUT1 (OUT) 1 6 VCC
VCC BIAS BIAS
MAX2473
GND 2
AC ELECTRICAL CHARACTERISTICS—MAX2472
(Typical Operating Circuits, VCC = +3V, PIN = -25dBm, IN driven from a 50Ω source, OUT1 and OUT2 LC matched to 50Ω, TA = +25°C, unless otherwise noted.) PARAMETER Input Frequency Range (Note 2) SYMBOL fIN fIN = 600MHz Transducer Gain (IN to OUT2) fIN = 900MHz, TA = +25°C S212 fIN = 900MHz, TA = TMIN to TMAX (Note 3) fIN = 1900MHz fIN = 2400MHz fIN = 600MHz Transducer Gain (IN to OUT1) Output 1dB Compression Point Reverse Isolation (IN to OUT2) S212 fIN = 900MHz fIN = 1900MHz fIN = 2400MHz POUT1dB fIN = 900MHz fIN = 600MHz S122 fIN = 900MHz fIN = 1900MHz fIN = 2400MHz 7.8 6.6 7.5 6.0 13.0 9.2 6.8 5.3 -3.2 43 40 30 26 dB dBm dB CONDITIONS MIN 500 14.0 10.2 12.2 14.6 dB TYP MAX 2500 UNITS MHz
MAX2472 MAX2473
5
GND IN OUT
OUT2 (BIAS) 3
4
IN GND GND
SOT23-6
( ) ARE FOR MAX2473.
________________________________________________________________ Maxim Integrated Products
ABSOLUTE MAXIMUM RATINGS
VCC to GND ..............................................................-0.3V to +7V OUT1, OUT2, BIAS to GND........................-0.3V to (VCC + 0.3V) Maximum BIAS Pin Current................................................150µA Maximum Input Power....................................................+10dBm Continuous Power Dissipation SOT23-6 (derate 8.7mW/°C above +70°C)...................696mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10sec) .............................+300°C