MANUA ALUAT DATA SHEET FOLLO 10MHz 500MHz Buffer Amplifiers with

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MANUA ALUAT DATA SHEET FOLLO 10MHz 500MHz Buffer Amplifiers with

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19-4797; 2/99
MANUA ALUAT DATA SHEET FOLLO
10MHz 500MHz Buffer Amplifiers with Differential Outputs
+2.7V +5.5V Supply Range Input Frequency Range High: 10MHz 500MHz (MAX2470/2471) Low: 10MHz 200MHz (MAX2470) >14dB Power Gain 200MHz 64dB Typical Reverse Isolation 200MHz Low-Distortion Output Drive Ultra-Small SOT23-6 Package High Input Impedance Single-Ended (MAX2470) Differential (MAX2471) Inputs
MAX2470/MAX2471
MAX2470/MAX2471 flexible, low-cost, highreverse-isolation buffer amplifiers applications with discrete module-based designs. Both feature differential outputs driving single differential (balanced) load separate single-ended (unbalanced) loads. MAX2470 offers single-ended input selectable frequency ranges operation: 10MHz 500MHz 10MHz 200MHz. MAX2471 offers differential input operates from 10MHz 500MHz. MAX2470/MAX2471 also feature high input impedance maximum flexibility, enabling them used with variety oscillator topologies. High reverse isolation combined with supply current make them ideal applications requiring high performance with power. These devices also ideal active baluns. MAX2470 converts single-ended input differential output. MAX2471 useful differential buffer stage convert from differential input single-ended outputs. MAX2470 operates from single +2.7V +5.5V supply. -5dBm output power, consumes 5.5mA high-frequency range only 3.6mA low-frequency range. MAX2471 operates from +2.7V +5.5V single supply consumes 5.5mA. Both devices available ultra-small SOT23-6 plastic packages, requiring minimal board space.
Ordering Information
PART MAX2470EUT-T MAX2471EUT-T TEMP. RANGE -40°C +85°C -40°C +85°C PINPACKAGE SOT23-6 SOT23-6 MARK AAAX AAAY
Typical Operating Circuits
HI/LO
Applications
Cellular Mobile Phones ISM-Band Applications Active Baluns General-Purpose Buffers/Amplifiers
BIAS
MAX2470
Configuration
VIEW
BIAS
MAX2471
MAX2470 MAX2471
HI/LO (IN)
SOT23-6
MAX2471
Maxim Integrated Products
free samples latest literature: http://www.maxim-ic.com, phone 1-800-998-8800. small orders, phone 1-800-835-8769.
10MHz 500MHz Buffer Amplifiers with Differential Outputs MAX2470/MAX2471
ABSOLUTE MAXIMUM RATINGS
.-0.3V GND.-0.3V (VCC 0.3V) 3.7V (whichever lower) .-2.2V +2.2V HI/LO .-0.3V (VCC 0.3V) Continuous Power Dissipation SOT23-6 (derate 8.7mW/°C above +70°C).696mW Operating Temperature Range .-40°C +85°C Junction Temperature .+150°C Storage Temperature Range .-65°C +150°C Lead Temperature (soldering, 10sec .+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated operational sections specifications implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
ELECTRICAL CHARACTERISTICS
(Typical Operating Circuit, +2.7V +5.5V, TMIN TMAX, unless otherwise noted. Typical values +3V, +25°C.) (Note PARAMETER Supply Voltage Range SYMBOL signal HI/LO Supply Current signal HI/LO HI/LO Input Level High HI/LO Input Level HI/LO Input Bias Current VHI/LO POUT -5dBm, RLOAD diff. signal POUT -5dBm, RLOAD diff. CONDITIONS UNITS
ELECTRICAL CHARACTERISTICS-MAX2470
(VCC +3V, HI/LO VCC, outputs differentially measured between driving load through 180° hybrid, +25°C, unless otherwise noted.) PARAMETER Input Frequency Range (Note SYMBOL HI/LO HI/LO 10MHz HI/LO Gain (Note IS21I2 HI/LO 200MHz 500MHz, TMIN TMAX 10MHz 200MHz 200MHz, TMIN TMAX Voltage Gain (Note 10MHz, HI/LO fOUT 500MHz, HI/LO fOUT 200MHz, RHI/LO CONDITIONS 14.9 14.9 13.3 13.8 14.1 13.4 10.2 10.2 15.0 15.3 UNITS
Noise Figure
RSOURCE fOUT 200MHz, RHI/LO
10MHz 500MHz Buffer Amplifiers with Differential Outputs
ELECTRICAL CHARACTERISTICS-MAX2470 (continued)
(VCC +3V, HI/LO VCC, outputs differentially measured between driving load through 180° hybrid, +25°C, unless otherwise noted.) PARAMETER Maximum Output VSWR (OUT, OUT) (Note SYMBOL VSWROUT CONDITIONS 10MHz fOUT 500MHz, HI/LO 10MHz fOUT 200MHz, HI/LO HI/LO IS12I2 HI/LO Isolation (Note Harmonic Suppression 100MHz 500MHz 100MHz 200MHz 1.5:1 1.2:1 UNITS
MAX2470/MAX2471
Reverse Isolation (Note
500MHz, HI/LO 200MHz, HI/LO 500MHz, POUT -5dBm, HI/LO 200MHz, POUT -5dBm, HI/LO
ELECTRICAL CHARACTERISTICS-MAX2471
(Typical values measured +3V, +25°C, unless otherwise noted.) (Note PARAMETER Input Frequency Range (Note Gain (Note Voltage Gain (Note Noise Figure Maximum Output VSWR (OUT, OUT) (Note Reverse Isolation Isolation (Note Harmonic Suppression SYMBOL 10MHz IS21I2 VSWROUT IS12I2 200MHz 500MHz, TMIN TMAX 10MHz fOUT 500MHz, RSOURCE 10MHz fOUT 500MHz 100MHz 500MHz 500MHz 500MHz, POUT -5dBm 11.3 CONDITIONS 15.9 16.9 15.6 1.5:1 17.8 UNITS
Note Limits 100% production tested +25°C. Limits over entire operating temperature range guaranteed design characterization production tested. Note part been characterized over specified frequency range. Operation outside this range possible guaranteed. Note Gain specified POUT -5dBm. Note Voltage gain measured with input termination output load. Note Output VSWR single-ended measurement each OUT. Note isolation with terminated with Note Input terminated with Note Unless otherwise noted: inputs differentially measured between driven load through 180° hybrid; outputs differentially measured between driving load through 180° hybrid.
10MHz 500MHz Buffer Amplifiers with Differential Outputs MAX2470/MAX2471
Typical Operating Characteristics
(VCC +3.0V, MAX2470 output MAX2471 input output measurements taken differentially, +25°C, unless otherwise noted.)
MAX2470 SUPPLY CURRENT SUPPLY VOLTAGE (HI/LO GND)
MAX2470/71-01
MAX2470 (HI/LO VCC) MAX2471 SUPPLY CURRENT SUPPLY VOLTAGE
MAX2470/71-02
MAX2470 OUTPUT POWER INPUT POWER
MAX2470/71-03
SUPPLY CURRENT (mA)
-5dBm OUTPUT POWER 200MHz HI/LO
SUPPLY CURRENT (mA)
-5dBm OUTPUT POWER 500MHz HI/LO (MAX2470)
OUTPUT POWER (dBm)
+25°C +85°C
HI/LO 200MHz HI/LO 500MHz
+85°C
+25°C
-40°C
-40°C
INPUT POWER (dBm)
SUPPLY VOLTAGE
SUPPLY VOLTAGE
MAX2470 TRANSDUCER GAIN FREQUENCY (HI/LO GND)
MAX2470/71-04
MAX2470 TRANSDUCER GAIN FREQUENCY (HI/LO VCC)
-40°C 16.0 15.0 +25°C IS21I2 (dB) 14.0 13.0 12.0 11.0 +85°C NOISE FIGURE (dB)
MAX2470/71-05
MAX2470 NOISE FIGURE FREQUENCY (HI/LO GND)
HI/LO 11.5
MAX2470/71-06
16.0 15.0 14.0 IS21I2 (dB) 13.0 +85°C 12.0 11.0 10.0 +25°C
-40°C
17.0
12.0
11.0
10.5
10.0 HI/LO FREQUENCY (MHz) FREQUENCY (MHz)
HI/LO
10.0
FREQUENCY (MHz)
MAX2470 NOISE FIGURE FREQUENCY (HI/LO VCC)
MAX2470/71-07
MAX2470 REAL INPUT IMPEDANCE FREQUENCY
MAX2470/71-08
MAX2470 IMAGINARY INPUT IMPEDANCE FREQUENCY
HI/LO -500 -1000 -1500 -2000
MAX2470/71-09
12.0 HI/LO 11.5 NOISE FIGURE (dB)
10,000 HI/LO
1000 [ZIN] [ZIN] FREQUENCY (MHz)
11.0
10.5 10.0 FREQUENCY (MHz) -2500 -3000 FREQUENCY (MHz)
10MHz 500MHz Buffer Amplifiers with Differential Outputs
Typical Operating Characteristics (continued)
(VCC +3.0V, MAX2470 output MAX2471 input output measurements taken differentially, +25°C unless otherwise noted.)
MAX2470 OUTPUT VSWR FREQUENCY
MAX2470/71-10
MAX2470/MAX2471
MAX2470 OUTPUT ISOLATION FREQUENCY
MAX2470/71-11
MAX2471 OUTPUT POWER INPUT POWER
OUTPUT POWER (dBm) INPUT POWER (dBm) 200MHz 500MHz
MAX2470/71-12
1.50 HI/LO INPUT TERMINATED SINGLE-ENDED MEASUREMENT OUTPUT VSWR
OUTPUT ISOLATION (dB) INPUT TERMINATED HI/LO SINGLE-ENDED MEASUREMENT
1.25
1.00 FREQUENCY (MHz)
FREQUENCY (MHz)
MAX2471 DIFFERENTIAL TRANSDUCER POWER GAIN FREQUENCY
MAX2470/71-13
MAX2471 NOISE FIGURE FREQUENCY
MAX2470/71-14
MAX2471 REAL INPUT IMPEDANCE FREQUENCY
MAX2470/71-15
17.5 TRANSDUCER POWER GAIN (dB) 17.0 16.5 16.0 15.5 15.0 14.5 14.0 +85°C -40°C
+25°C
8.50
10,000
8.25 NOISE FIGURE (dB)
1000 8.00 [ZIN]
7.75
7.50
7.25 FREQUENCY (MHz) FREQUENCY (MHz)
FREQUENCY (MHz)
MAX2471 IMAGINARY INPUT IMPEDANCE FREQUENCY
MAX2470/71-16
MAX2471 OUTPUT VSWR FREQUENCY
MAX2470/71-17
MAX2471 OUTPUT ISOLATION FREQUENCY
SINGLE-ENDED MEASUREMENT
MAX2470/71-18
1.50 INPUT TERMINATED SINGLE-ENDED MEASUREMENT VSWR 1.25
OUTPUT ISOLATION (dB) INPUT TERMINATED
OUTPUT VSWR
[ZIN]
VSWR
-500
-1000 FREQUENCY (MHz)
1.00 FREQUENCY (MHz)
FREQUENCY (MHz)
10MHz 500MHz Buffer Amplifiers with Differential Outputs MAX2470/MAX2471
Description
NAME MAX2470 MAX2471 Differential Noninverting Buffer Output. Broadband output. coupling required. couple this pin. Ground. Connect ground plane close possible minimize ground path inductance. Differential Inverting Buffer Output. Broadband output. coupling required. couple this pin. Bias Bandwidth Control Input. Connect internal bias higher bandwidth operation (10MHz 500MHz). Connect internal bias lower bandwidth operation (10MHz 200MHz) reduce overall current consumption. Differential Inverting Buffer Input. High impedance input buffer amplifier. Setting Input Impedance section. Differential Noninverting Buffer Input. High impedance buffer amplifier. Setting Input Impedance section. Supply Voltage Input. +2.7V +5.5V. FUNCTION
HI/LO
Detailed Description
Bandwidth Control Circuitry
MAX2470 features logic-controlled bias circuit which optimizes performance input frequencies from 10MHz 500MHz (HI/LO VCC) 10MHz 200MHz (HI/LO GND). Operating with HI/LO significantly reduces power consumption.
Output Considerations
MAX2470 MAX2471 incorporate fully differential output stages capable driving AC-coupled differential load AC-coupled singleended loads. This ideal applications that require oscillator drive application circuits (e.g. mixer PLL) simultaneously. high output-to-output isolation ensures minimal interaction between multiple load circuits.
Applications Information
Input Considerations
MAX2470/MAX2471 offer high-impedance inputs, ideal low-distortion buffering VCO. applications with discrete transistor-based oscillator designs, simply AC-couple oscillator directly inputs. buffer's high input impedance results minimal loading oscillator. still higher real input impedance reduced loading effects, match inputs with shunt-L matching circuit followed series blocking capacitor. with modules, terminate buffer input(s) with shunt resistor followed series-blocking capacitor. This provides very stable termination increases reverse isolation. those applications needing both high gain good input match, reactively match buffer inputs with simple two-element matching circuits followed series blocking capacitor.
Layout Power-Supply Bypassing
properly designed board essential microwave circuit. sure controlled impedance lines high-frequency inputs outputs. Bypass power supply with decoupling capacitors close pins possible. long lines (inductive), necessary additional decoupling capacitors located further away from device package. Proper grounding essential. board uses topside ground, connect directly board where ground plane component side, best technique connect board with plated through-hole (via) ground plane close package.
10MHz 500MHz Buffer Amplifiers with Differential Outputs
Chip Information
TRANSISTOR COUNT:
MAX2470/MAX2471
Package Information
6LSOT.EPS
10MHz 500MHz Buffer Amplifiers with Differential Outputs MAX2470/MAX2471
NOTES

MANUA ALUAT DATA SHEET FOLLO 10MHz 500MHz Buffer Amplifiers with

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