max2471 Maxim Integrated Products, Inc., max2471 Datasheet

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max2471

Manufacturer Part Number
max2471
Description
10mhz To 500mhz Vco Buffer Amplifiers With Differential Outputs
Manufacturer
Maxim Integrated Products, Inc.
Datasheet

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The MAX2470/MAX2471 are flexible, low-cost, high-
reverse-isolation buffer amplifiers for applications with
discrete and module-based VCO designs. Both feature
differential 50
(balanced) load or two separate single-ended (unbal-
anced) 50
input and has two selectable frequency ranges of oper-
ation: 10MHz to 500MHz and 10MHz to 200MHz. The
MAX2471 offers a differential input and operates from
10MHz to 500MHz. The MAX2470/MAX2471 also feature
high input impedance for maximum flexibility, enabling
them to be used with a variety of oscillator topologies.
High reverse isolation combined with low supply current
make them ideal for applications requiring high perfor-
mance with low power.
These devices are also ideal for use as active baluns.
The MAX2470 converts a single-ended input to a differ-
ential output. The MAX2471 is useful as a differential
buffer stage or to convert from a differential input to two
single-ended outputs.
The MAX2470 operates from a single +2.7V to +5.5V
supply. At -5dBm output power, it consumes 5.5mA in
the high-frequency range and only 3.6mA in the
low-frequency range. The MAX2471 operates from a
+2.7V to +5.5V single supply and consumes 5.5mA.
Both devices are available in ultra-small SOT23-6 plas-
tic packages, requiring minimal board space.
19-4797; Rev 0; 2/99
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Cellular and PCS Mobile Phones
ISM-Band Applications
Active Baluns
General-Purpose Buffers/Amplifiers
TOP VIEW
( ) ARE FOR MAX2471
loads. The MAX2470 offers a single-ended
GND
OUT
OUT
outputs for driving a single differential
________________________________________________________________ Maxim Integrated Products
10MHz to 500MHz VCO Buffer Amplifiers
1
2
3
General Description
SOT23-6
MAX2470
MAX2471
Pin Configuration
6
5
4
Applications
V
IN
HI/LO (IN)
CC
with Differential Outputs
MAX2470EUT-T
MAX2471EUT-T
+2.7V to +5.5V Supply Range
Input Frequency Range
>14dB Power Gain at 200MHz
64dB Typical Reverse Isolation at 200MHz
Low-Distortion Output Drive
Ultra-Small SOT23-6 Package
High Input Impedance
Single-Ended (MAX2470) or Differential
(MAX2471) Inputs
High: 10MHz to 500MHz (MAX2470/2471)
Low: 10MHz to 200MHz (MAX2470)
PART
IN
IN
IN
Typical Operating Circuits
V
V
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
CC
CC
BIAS
BIAS
GND
GND
Ordering Information
HI/LO
MAX2470
MAX2471
PACKAGE
6 SOT23-6
6 SOT23-6
PIN-
OUT
OUT
OUT
OUT
Features
50
50
SOT TOP
50
50
MARK
AAAX
AAAY
1

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max2471 Summary of contents

Page 1

... These devices are also ideal for use as active baluns. The MAX2470 converts a single-ended input to a differ- ential output. The MAX2471 is useful as a differential buffer stage or to convert from a differential input to two single-ended outputs. The MAX2470 operates from a single +2.7V to +5.5V supply ...

Page 2

VCO Buffer Amplifiers with Differential Outputs ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0. GND......-0. 0.3V) or 3.7V (whichever is lower ..................................................................-2.2V to +2.2V HI/LO to ...

Page 3

... A PARAMETER SYMBOL Maximum Output VSWR VSWR (OUT, OUT) (Note 5) Reverse Isolation IS 12 (Note 6) Isolation OUT to OUT (Note 7) Harmonic Suppression AC ELECTRICAL CHARACTERISTICS—MAX2471 (Typical values are measured +3V PARAMETER SYMBOL Input Frequency Range f IN (Note 2) Gain (Note Voltage Gain (Note 4) ...

Page 4

... VCO Buffer Amplifiers with Differential Outputs (V = +3.0V, MAX2470 output and MAX2471 input and output measurements taken differentially noted.) MAX2470 SUPPLY CURRENT vs. SUPPLY VOLTAGE (HI/LO = GND) 4.0 -5dBm OUTPUT POWER f = 200MHz 3.9 IN HI/LO = GND 3.8 3 +25° +85°C 3.6 A 3.5 3 -40°C A 3.3 3.2 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) MAX2470 TRANSDUCER GAIN vs. FREQUENCY (HI/LO = GND) 16 ...

Page 5

... VCO Buffer Amplifiers (V = +3.0V, MAX2470 output and MAX2471 input and output measurements taken differentially noted.) MAX2470 OUTPUT VSWR vs. FREQUENCY 1.50 HI/ INPUT TERMINATED IN 50 SINGLE-ENDED MEASUREMENT OUT 1.25 OUT 1.00 0 100 200 300 400 FREQUENCY (MHz) MAX2471 DIFFERENTIAL TRANSDUCER POWER GAIN vs. FREQUENCY 17 ...

Page 6

... Differential Noninverting Buffer Input. High impedance to buffer amplifier. See Setting The Input Impedance section. Supply Voltage Input. +2.7V < V < +5.5V. CC The MAX2470 and MAX2471 incorporate fully differen- tial output stages capable of driving an AC-coupled 100 differential load or two AC-coupled 50 ended loads. This is ideal for applications that require ) and 10MHz to the oscillator to drive two application circuits (e ...

Page 7

VCO Buffer Amplifiers Chip Information TRANSISTOR COUNT: 67 _______________________________________________________________________________________ with Differential Outputs Package Information 7 ...

Page 8

VCO Buffer Amplifiers with Differential Outputs 8 _______________________________________________________________________________________ NOTES ...

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