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Part: MAX4005CSA
Category:
Description: Ic-sm-950mhz Fet-buffer
Company:
Datasheet: Download MAX4005CSA datasheet File size : 155 kB
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19-0315; Rev 0; 10/94
950MHz FET-Input Buffer with 75 Output
_______________General Description
The MAX4005 is a ±5V, single-ended unity-gain buffer with a high-impedance JFET input, intended to drive a 75 load. A 75 thin-film output resistor is included onboard to minimize reflections when driving a 75 load through a transmission line of arbitrary length. Gain in this configuration is 0.5.
____________________________Features
o 950MHz Bandwidth o 350ps Rise/Fall Times o 0.11%/0.03° Differential Gain/Phase Error o 1000V/µs Slew Rate o 10pA Input Bias Current o 75 Output Impedance
MAX4005
________________________Applications
Video Buffer / Line Driver Isolation Between High-Impedance Node and Low-Impedance Instrument Remote Signal Sensing Impedance Transformation Fanout Multiplier for 75 Distribution Systems
______________Ordering Information
PART MAX4005CSA TEMP. RANGE 0°C to +70°C PIN-PACKAGE 8 SO
__________Typical Operating Circuit
__________________Pin Configuration
TOP VIEW
-5V
1
8
-5V VEE 1 8 7 VEE PEAK OUT VCCO
MAX4005
INPUT 2 3 4
7 6 5
N.C. Z = 75 +5V OUT RL = 75
IN 2 GND 3 VCC 4
MAX4005
6 5
+5V
SO
________________________________________________________________ Maxim Integrated Products
1
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950MHz FET-Input Buffer with 75 Output MAX4005
ABSOLUTE MAXIMUM RATINGS
Input Voltage.....±2.5V VCC Supply Voltage ...+5.5V Output-Stage Supply .........+5.5V VEE Supply Voltage.....-5.5V Peaking Pad Voltage....0.0V Ground Voltage ............0.0V Continuous Power Dissipation (TA = +70°C) ..........471mW Operating Temperature Range.......0°C to +70°C Lead Temperature (soldering, 10sec) .....+300°C
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.
ELECTRICAL CHARACTERISTICS
(VCC = 4.75V to 5.25V, VEE = -4.75V to -5.25V, TA = +25°C, stated performance characterized for TA = 0°C to +70°C, unless otherwise noted.) PARAMETER +5V VCC Current +5V Output Stage Quiescent Current -5V VEE Current Output Offset Voltage Output Resistance Input Current Gain Linearity Input Dynamic Range +5V VCC Power-Supply Rejection Ratio +5V Output Stage Power-Supply Rejection Ratio -5V VEE Power-Supply Rejection Ratio ROUT IB VIN = 0V RL = 75 RL = 75, measured over input dynamic range RL = 75, gain = 0.5 VIN = 0V, RL = 75 VIN = 0V, RL = 75 VIN = 0V, RL = 75 -1.3 40 50 40 SYMBOL IVCC1 IVCC2 IVEE CONDITIONS VIN = 0V, RL = 75 VIN = 0V, RL = 75 VIN = 0V, RL = 75 RL = 75, gain = 0.5 MIN 9 9 17 -3 74.0 -1 0.49 75.0 0.01 0.50 0.50 TYP 14 11 24 MAX 19 14 31 3 76.5 1 0.51 1 1.6 55 75 60 % V dB dB dB UNITS mA mA mA mV nA
TYPICAL OPERATING PERFORMANCE (VCC = 5.0V, VEE = -5.0V, RL = 75, TA = +25°C, unless otherwise noted.) -3dB 950 Bandwidth BW -6dB 2000 Input Capacitance Settling Time to 0.1% Rise/Fall Times Gain Flatness Gain Flatness ±0.1dB Gain Flatness ±0.2dB Slew Rate Overdrive Recovery Time 2nd Harmonic Distortion 3rd Harmonic Distortion 3rd-Order Intercept Differential Gain Error Differential Phase Error CIN tSET GF GF1 GF2 SR tOD 2HD 3HD TOI DG DP VIN = 2.5V step with 200ps rise time VIN = 2.5V step At 50MHz At 50MHz At 100MHz At 3.58MHz At 3.58MHz VIN = 0.25V step, VOUT = 0.125V step At 30MHz tRISE/tFALL VIN = 0.25V step with < 30ps rise time 2.2 2 350 ±0.01 60 80 1000 5 -50 < -60 28 0.11 0.03
MHz pF ns ps dB MHz MHz V/µs ns dBc dBc dBm % degrees
2
_______________________________________________________________________________________
950MHz FET-Input Buffer with 75 Output
__________________________________________Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
SMALL-SIGNAL STEP RESPONSE
MAX4005-01 MAX4005-02
MAX4005
GAIN vs. FREQUENCY
-3dB, 977MHz -6dB VOLTAGE GAIN (5dB/div)
SMALL-SIGNAL STEP RESPONSE
MAX4005-03
OUTPUT VOLTAGE (10mV/div)
tRISE = 340ps
OUTPUT VOLTAGE (20mV/div)
tRISE = 357ps
0.3 1
10
100
1000
TIME (2ns/div)
TIME (2ns/div)
FREQUENCY (kHz)
T SMALL-SIGNAL STEP RESPONSE vs. CAPACITIVE LOAD
MAX4005-04
HIRD-ORDER INTERCEPT vs. FREQUENCY
THIRD-ORDER INTERCEPT (dBm) 35 30 25 20 15 10 5 0
MAX4005-05
40
OUTPUT VOLTAGE (20mV/div)
CL = 5.6pF CL = 10pF CL = 18pF CL = 33pF VIN = 200mV STEP RL = 75 TIME (2ns/div)
100
150
200
250
300
350
400
FREQUENCY (MHz)
_______________________________________________________________________________________
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