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MAX4706ELT-T

Low-Voltage, 2Ω, SPST, CMOS Analog Switches

Maxim Integrated 

Low-Voltage, 2Ω, SPST,

CMOS Analog Switches

Detailed Description

The MAX4706/MAX4707 SPST switches operate from a

single supply ranging from 1.8V to 5.5V. The MAX4706

is a normally closed (NC) switch and the MAX4707 is

the normally open (NO) version. These switches provide

3.5Ω on-resistance (RON) and 0.9Ω RON flatness with a

+2.7V supply. These devices typically consume only

0.02µA of quiescent current, making them suitable for

use in low-power, portable applications. The

MAX4706/MAX4707 feature low-leakage currents over

POSITIVE SUPPLY

D1

V+

MAX4706

MAX4707

COM

N0

Vg

GND

D2

the entire temperature range, TTL/CMOS-compatible

digital logic, and excellent AC characteristics.

The MAX4706/MAX4707 are offered in small 5-pin and

6-pin SC70 and 6-pin µDFN packages.

Applications Information

The MAX4706/MAX4707 operate from a single +1.8V to

+5.5V supply. The MAX4706/MAX4707 accept bipolar

input signals when V+ and GND are biased from bipolar

supplies. For example, the switch accepts a 1VP-P input

when V+ = 2V and GND = -2V. ESD-protection diodes

are internally connected between each analog switch

terminal and both V+ and GND. One of these diodes

conducts if any analog signal is greater than V+ or less

than GND (Figure 1). Virtually all analog leakage current

is attributed to the ESD diodes. Each diode is biased by

the analog signal and either V+ or GND. The ESD

diodes’ leakage currents vary as the signal changes.

Power-Supply Sequencing and

Overvoltage Protection

Caution: Do not exceed the absolute maximum

ratings because stresses beyond the listed ratings

may cause permanent damage to the device.

Proper power-supply sequencing is recommended for

all CMOS devices. Always apply V+ before applying

analog signals, especially if the analog signal is not

current-limited.

Figure 1. Overvoltage Protection Using Two External Blocking

Diodes

MAX4706

MAX4707

SWITCH

INPUT

VCOM

COM

LOGIC

INPUT

IN

GND

V+

V+

NO

OR NC

SWITCH

OUTPUT

VOUT

RL

CL

CL INCLUDES FIXTURE AND STRAY CAPACITANCE.

( ) VOUT = VCOM

RL

RL + RON

Figure 2. Switching Time

LOGIC V+

INPUT 0V

50%

tr < 5ns

tf < 5ns

tOFF

VOUT

SWITCH 0V

OUTPUT

0.9 x V0UT

tON

0.9 x V0UT

LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES

THAT HAVE THE OPPOSITE LOGIC SENSE.

6 _______________________________________________________________________________________

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