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General Description

The MAX4529 is a low-voltage T-switch designed for

switching RF and video signals from DC to 300MHz in

50Ω and 75Ω systems. This switch is constructed in a

“T” configuration, ensuring excellent high-frequency off

isolation of -80dB at 10MHz.

The MAX4529 can handle Rail-to-Rail

analog signals

in either direction. On-resistance (70Ω max) is flat (0.5Ω

max) over the specified signal range, using ±5V sup-

plies. The off leakage current is less than 1nA at +25°C

and 20nA at +85°C.

This CMOS switch can operate with dual power sup-

plies ranging from ±2.7V to ±6V or a single supply

between +2.7V and +12V. All digital inputs have

0.8V/2.4V logic thresholds, ensuring both TTL- and

CMOS-logic compatibility when using ±5V or a single

+5V supply.

________________________Applications

RF Switching

Video Signal Routing

High-Speed Data Acquisition

Test Equipment

ATE Equipment

Networking

____________________________Features

♦ High 50Ω Off Isolation: -80dB at 10MHz

♦ DC to 300MHz -3dB Signal Bandwidth

♦ 70Ω Signal Paths with ±5V Supplies

♦ 10Ω Signal-Path Flatness with ±5V Supplies

♦ ±2.7V to ±6V Dual Supplies

+2.7V to +12V Single Supply

♦ Low Power Consumption: <1µW

♦ Rail-to-Rail Bidirectional Signal Handling

♦ >2kV ESD Protection per Method 3015.7

♦ TTL/CMOS-Compatible Inputs with

Single +5V or ±5V

MAX4529

Low-Voltage, Bidirectional

RF/Video Switch

________________________________________________________________ Maxim Integrated Products 1

MAX4529

DIP/SO/µMAX

V+

COM

N.C.

V-IN

GND

N.C.

N.C. = NOT INTERNALLY CONNECTED

LOGIC SWITCH

OFF

MAX4529

SOT23-6

COM

GND

INV-

V+

_______________________Pin Configurations/Functional Diagrams/Truth Table

19-1262; Rev 1; 5/01

Ordering Information

*Contact factory for dice specifications.

Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.

PART

MAX4529CPA

MAX4529CSA 0°C to +70°C

0°C to +70°C

TEMP. RANGE

PIN-

PACKAGE

8 Plastic DIP

8 Narrow SO

SOT

TOP MARK

—

MAX4529CUA

MAX4529

CUT-T

—

0°C to +70°C

0°C to +70°C 8 µMAX

6 SOT23-6 AAAQ

MAX4529C/D

MAX4529EPA

—

-40°C to +85°C

0°C to +70°C Dice*

8 Plastic DIP —

MAX4529ESA

MAX4529EUA

—

-40°C to +85°C

-40°C to +85°C 8 Narrow SO

8 µMAX —

MAX4529

EUT-T

-40°C to +85°C 6 SOT23-6 AAAQ

Summary of content (12 pages)

PAGE 1
9-1262; Rev 1; 5/01 Low-Voltage, Bidirectional RF/Video Switch The MAX4529 is a low-voltage T-switch designed for switching RF and video signals from DC to 300MHz in 50Ω and 75Ω systems. This switch is constructed in a “T” configuration, ensuring excellent high-frequency off isolation of -80dB at 10MHz. The MAX4529 can handle Rail-to-Rail® analog signals in either direction. On-resistance (70Ω max) is flat (0.5Ω max) over the specified signal range, using ±5V supplies.
PAGE 2
MAX4529 Low-Voltage, Bidirectional RF/Video Switch ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND) V+ ...........................................................................-0.3V, +13.0V V- ............................................................................-13.0V, +0.3V V+ to V-...................................................................-0.3V, +13.0V All Other Pins (Note 1) ..........................(V- - 0.3V) to (V+ + 0.3V) Continuous Current into Any Terminal...................
PAGE 3
Low-Voltage, Bidirectional RF/Video Switch (V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, VINL = 0.8V, VINH = 2.4V, VGND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS TA MIN TYP (Note 2) MAX UNITS SWITCH DYNAMIC CHARACTERISTICS Turn-On Time tON VCOM = ±3V, V+ = 5V, V- = -5V, Figure 2 +25°C Turn-Off Time tOFF VCOM = ±3V, V+ = 5V, V- = -5V, Figure 2 +25°C Q CL = 1.
PAGE 4
MAX4529 Low-Voltage, Bidirectional RF/Video Switch ELECTRICAL CHARACTERISTICS—Single +5V Supply (V+ = +4.5V to +5.5V, V- = 0V, VINL = 0.8V, VINH = 2.4V, VGND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS TA MIN TYP (Note 2) MAX 70 120 UNITS ANALOG SWITCH Analog Signal Range (Note 3) +25°C V+ = 5V, VCOM = 3V, ICOM = 1mA +25°C INC(OFF) V+ = 5.5V, VCOM = 1V, VNC = 4.
PAGE 5
Low-Voltage, Bidirectional RF/Video Switch (V+ = +2.7V to +3.6V, V- = 0V, VINL = 0.4V, VINH = 2.4V, VGND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TA TYP (Note 2) MAX UNITS ANALOG SWITCH Analog Signal Range VCOM, VNC Signal-Path On-Resistance (Note 3) +25°C 0 RON V+ = 2.7V, VCOM = 1.5V, ICOM = 0.1mA +25°C VINH (Note 3) C, E VINL (Note 3) C, E 0.4 VIN = 0.4V or 2.
PAGE 6
____________________________Typical Operating Characteristics (continued) (V+ = +5V, V- = -5V, GND = 0V, TA = +25°C, packages are surface mount, unless otherwise noted.) SUPPLY, COM, AND NC LEAKAGE CURRENTS vs. TEMPERATURE 100,000 30 +25°C 0°C 1000 100 1 V+ = 5V V- = 0V V+ = 5V V- = -5V 0.01 0 -55 -35 -15 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5 25 45 65 85 105 125 -5 -4 -3 -2 -1 0 1 2 3 VCOM (V) TEMPERATURE (°C) VCOM (V) ON-TIME vs. TEMPERATURE OFF-TIME vs.
PAGE 7
Low-Voltage, Bidirectional RF/Video Switch PIN NAME FUNCTION* SOT23-6 DIP/SO/µMAX — 1, 6 N.C. Not Internally Connected 1 2 NC Analog Switch Normally Closed** Terminal 2 8 V+ Positive Supply-Voltage Input (analog and digital). The voltage difference between V+ and V- should never exceed 12V. 3 5 V- -5V Supply Input. Connect to GND for single-supply operation. 4 4 IN Logic-Level Control Input. Logic-level voltages should never exceed V+ or V-. 5 3 GND RF and Logic Ground.
PAGE 8
MAX4529 Low-Voltage, Bidirectional RF/Video Switch The MAX4529 is a optimized for ±5V operation. Using lower supply voltages or a single supply increases switching time, on-resistance (and therefore on-state attenuation), and nonlinearity. switched V+ and V- signals to drive the gates of the analog switches. This drive signal is the only connection between the logic supplies and the analog supplies. All pins have ESD protection to V+ and to V-.
PAGE 9
Low-Voltage, Bidirectional RF/Video Switch Power Off When power to the MAX4529 is off (i.e., V+ = 0V and V= 0V), the Absolute Maximum Ratings still apply. This means that neither logic-level inputs on IN nor signals on COM or NC can exceed ±0.3V. Voltages beyond ±0.3V cause the internal ESD-protection diodes to conduct, and the parts can be damaged if excessive current flows. Grounding DC Ground Considerations Satisfactory high-frequency operation requires that careful consideration be given to grounding.
PAGE 10
MAX4529 Low-Voltage, Bidirectional RF/Video Switch ______________________________________________Test Circuits/Timing Diagrams +5V 10nF V+ V+ NC VIN 3V 50% 50% 0V MAX4529 VIN 90% VOUT IN VOUT COM GND 90% 0V VRL = 50Ω 50Ω tOFF tON 10nF -5V V- IS CONNECTED TO GND (OV) FOR SINGLE-SUPPLY OPERATION. Figure 2.
PAGE 11
Low-Voltage, Bidirectional RF/Video Switch +5V 10nF OFF ISOLATION = 20log NETWORK ANALYZER 0V OR V+ V+ IN NC 50Ω VIN VOUT VIN V ON LOSS = 20log OUT VIN 50Ω MAX4529 COM GND VOUT V- MEAS REF 50Ω 50Ω 10nF -5V MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT IC TERMINALS. OFF ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" NC TERMINAL. ON LOSS IS MEASURED BETWEEN COM_ AND "ON" NC TERMINAL. SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
PAGE 12
________________________________________________________Package Information 6LSOT.EPS MAX4529 Low-Voltage, Bidirectional RF/Video Switch Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.