Datasheet

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_______________General Description

The MAX4565/MAX4566/MAX4567 are low-voltage

T-switches designed for switching RF and video signals

from DC to 350MHz in 50Ω and 75Ω systems. The

MAX4565 contains four normally open single-pole/single-

throw (SPST) switches. The MAX4566 contains two dual

SPST switches (one normally open, one normally closed.)

The MAX4567 contains two single-pole/double-throw

(SPDT) switches.

Each switch is constructed in a “T” configuration, ensuring

excellent high-frequency off isolation and crosstalk of

-83dB at 10MHz. They can handle Rail-to-Rail

analog sig-

nals in either direction. On-resistance (60Ω max) is

matched between switches to 2.5Ω max and is flat (2Ω

max) over the specified signal range, using ±5V supplies.

The off leakage current is less than 5nA at +25°C and

50nA at +85°C.

These CMOS switches 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 com-

patibility 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: -83dB at 10MHz

♦ Low 50Ω Crosstalk: -87dB at 10MHz

♦ DC to 350MHz -3dB Signal Bandwidth

♦ 60Ω Signal Paths with ±5V Supplies

♦ 2.5Ω Signal-Path Matching with ±5V Supplies

♦ 2Ω Signal-Path Flatness with ±5V Supplies

♦ Low 50Ω Insertion Loss: 2.5dB at 100MHz

♦ ±2.7V to ±6V Dual Supplies

+2.7V to +12V Single Supply

♦ Low Power Consumption: <1µW

♦ Rail-to-Rail Bidirectional Signal Handling

♦ Pin Compatible with Industry-Standard DG540,

DG542, DG643

♦ >2kV ESD Protection per Method 3015.7

♦ TTL/CMOS-Compatible Inputs

with Single +5V or ±5V

MAX4565/MAX4566/MAX4567

Quad/Dual, Low-Voltage,

Bidirectional RF/Video Switches

________________________________________________________________

Maxim Integrated Products

TOP VIEW

MAX4566

DIP/SO/QSOP

IN2

COM2

GND2

NO2

V+

NC3

GND3

COM3

N01

GND1

COM1

IN1

COM4

GND4

NC4

V-

IN2

COM2

GND2

NO2N01

GND1

COM1

IN1

V+

GND6

N03

GND3GND4

N04

GND5

V-

COM3

IN3IN4

COM4

MAX4565

DIP/SO/SSOP

MAX4567

DIP/SO/QSOP

N02

V+

GND2

COM2

GND3

V-

NC2

IN2

GND1

V-

N01

IN1

NC1

V+

GND4

COM1

MAX4565

SWITCHES SHOWN

FOR LOGIC “0” INPUT

LOGIC SWITCH

OFF

MAX4567

LOGIC NO-COM

OFF

NC-COM

OFF

MAX4566

LOGIC 1, 2

OFF

3, 4

OFF

_____________________Pin Configurations/Functional Diagrams/Truth Tables

19-1252; Rev 0; 7/97

______________Ordering Information

Ordering Information continued at end of data sheet.

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

PART

MAX4565CPP

MAX4565CWP 0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

20 Plastic DIP

20 Wide SO

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.

Summary of content (16 pages)

PAGE 1
9-1252; Rev 0; 7/97 Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches ________________________Applications ____________________________Features ♦ High 50Ω Off Isolation: -83dB at 10MHz ♦ Low 50Ω Crosstalk: -87dB at 10MHz ♦ DC to 350MHz -3dB Signal Bandwidth ♦ 60Ω Signal Paths with ±5V Supplies ♦ 2.5Ω Signal-Path Matching with ±5V Supplies ♦ 2Ω Signal-Path Flatness with ±5V Supplies ♦ Low 50Ω Insertion Loss: 2.5dB at 100MHz ♦ ±2.7V to ±6V Dual Supplies +2.
PAGE 2
MAX4565/MAX4566/MAX4567 Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches 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.
PAGE 3
Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches (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.
PAGE 4
MAX4565/MAX4566/MAX4567 Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches 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 UNITS ANALOG SWITCH Analog Signal Range VCOM_, VNO_, VNC_ (Note 3) +25°C Signal-Path On-Resistance RON V+ = 4.5V, VCOM_ = 3.
PAGE 5
Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches (V+ = +2.7V to +3.6V, 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 UNITS ANALOG SWITCH Analog Signal Range VCOM_, VNO_, VNC_ (Note 3) +25°C RON V+ = 2.7V, VCOM_ = 1V, ICOM_ = 1mA +25°C IN_ Input Logic Threshold High VIN_H (Note 3) C, E IN_ Input Logic Threshold Low VIN_L (Note 3) C, E 0.
PAGE 6
__________________________________________Typical Operating Characteristics (V+ = +5V, V- = -5V, TA = +25°C, GND = 0V, packages are surface mount, unless otherwise noted.) V+ = 2V, V- = -2V V+ = 2V V+ = 3.3V V+ = 5V V+ = 7.5V 100 TA = +85°C 45 RON (Ω) RON (Ω) 100 TA = +125°C 55 V+ = 2.7V TA = +25°C 35 TA = 0°C 25 TA = -40°C V+ = 10V V+ = 3.3V, V- = -3.3V 15 V- = 0V 10 10 -4 -3 -2 -1 0 1 2 3 4 0 5 1 2 3 4 5 6 7 8 9 VCOM (V) VCOM (V) ON-RESISTANCE vs.
PAGE 7
Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches MAX4567 TOTAL HARMONIC DISTORTION vs. FREQUENCY LOGIC-LEVEL THRESHOLD VOLTAGE vs. V+ SUPPLY VOLTAGE TOTAL HARMONIC DISTORTION (%) 2.5 2.0 1.5 1.0 0.5 V+ = +5V V- = -5V SIGNAL = 5Vp-p 600Ω IN AND OUT 10 1 0.1 0.
PAGE 8
MAX4565/MAX4566/MAX4567 Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches ______________________________________________________________Pin Description PIN NAME FUNCTION* MAX4565 MAX4566 MAX4567 1, 10, 11, 20 1, 16 1, 9 IN_ 3, 6, 8, 13, 15, 18 3, 7, 10, 14 4, 6, 12, 14 GND_ 16 12 7, 15 V+ Positive Supply-Voltage Input (analog and digital) 5 5 3, 11 V- Negative Supply-Voltage Input. Connect to ground plane for single-supply operation.
PAGE 9
Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches The MAX4565/MAX4566/MAX4567 are optimized for ±5V operation. Using lower supply voltages or a single supply increases switching time, increases on-resistance (and therefore on-state attenuation), and increases nonlinearity. Switch Off Condition When the switch is off, MOSFETs N1, N2, P1, and P2 are off and MOSFET N3 is on. The signal path is through the off-capacitances of the series MOSFETs, but it is shunted to ground by N3.
PAGE 10
MAX4565/MAX4566/MAX4567 Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches Single-Supply Operation The MAX4565/MAX4566/MAX4567 operate from a single supply between +2.7V and +12V when V- is connected to GND. All of the bipolar precautions must be observed. Note, however, that these parts are optimized for ±5V operation, and most AC and DC characteristics are degraded significantly when departing from ±5V.
PAGE 11
Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches 10nF Board Layout IC sockets degrade high-frequency performance and should not be used if signal bandwidth exceeds 5MHz. Surface-mount parts, having shorter internal lead frames, provide the best high-frequency performance. Keep all bypass capacitors close to the device, and separate all signal leads with ground planes. Such grounds tend to be wedge-shaped as they get closer to the device.
PAGE 12
MAX4565/MAX4566/MAX4567 Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches Multiplexer With its excellent off isolation, the MAX4565 is ideal for use in high-frequency video multiplexers. Figure 2 shows such an application for switching any one of four video inputs to a single output. The same circuit may be used as a demultiplexer by simply reversing the signal direction.
PAGE 13
Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches 10nF +5V V+ * COM3 3V * COM2 MAX4566 * N02 VIN_ IN_ VOUT * NC3 GND_ RL = 300Ω 50Ω tR < 20ns tF < 20ns V+ V- 50% VIN_ 0V 10nF -5V 80% * REPEAT TEST FOR OTHER PAIR OF SWITCHES. VOUT 10nF +5V 0V tBBM V+ **NC_ 1V ALL GND_ PINS ARE CONNECTED TO GROUND PLANE (OV). V+ IS CONNECTED TO GND (OV) FOR SINGLE-SUPPLY OPERATION. **NO_ MAX4567 VIN_ IN_ **COM_ V- GND_ VOUT RL = 300Ω 50Ω 10nF -5V ** REPEAT TEST FOR OTHER SWITCH. Figure 4.
PAGE 14
MAX4565/MAX4566/MAX4567 Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches _________________________________Test Circuits/Timing Diagrams (continued) 10nF +5V V+ NO_ OR NC_ V+ VIN_ VNO = 0V 0V MAX4565 MAX4566 MAX4567 VIN_ IN_ COM_ GND_ V- ∆VOUT VOUT VOUT CL = 1000pF 50Ω 10nF ∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. -5V Q = ∆VOUT x CL V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION. Figure 5.
PAGE 15
Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches _________________Chip Topographies MAX4565 10nF +5V COM1 IN1 IN2 COM2 0V OR V+ V+ IN_ NO_ GND_ N.C. NC_ MAX4565 MAX4566 MAX4567 GND2 GND1 1MHz CAPACITANCE ANALYZER COM_ V- NO2 NO1 V+ GND6 VGND5 0.082" (2.08mm) NO3 NO4 10nF GND3 GND4 -5V N.C. ALL GND_ PINS ARE CONNECTED TO GROUND PLANE (0V). COM4 IN4 IN3 COM3 0.072" (1.83mm) Figure 7. NO_, NC_, COM_ Capacitance MAX4566 MAX4567 NO1 IN1 NO2 COM1 IN1 IN2 COM2 N.C.
PAGE 16
___________________________________________Ordering Information (continued) PART MAX4565CAP MAX4565C/D TEMP.