10

Ω

Ω, Quad, SPST, +3V Logic-Compatible

Analog Switches

8

_______________________________________________________________________________________

Applications Information

Low-Distortion Audio

well suited for low-distortion audio applications. The

Typical Operating Characteristics show Total Harmonic

Distortion (THD) vs. Frequency graphs for several signal

amplitudes and impedances. Higher source and load

impedances improve THD, but reduce off-isolation.

Off-Isolation at High Frequencies

In 50Ω systems, the high-frequency on-response of

these parts extends from DC to above 100MHz with a

typical loss of -2dB. When the switch is turned off, how-

ever, it behaves like a capacitor, and off-isolation

decreases with increasing frequency. (Above 300MHz,

the switch actually passes more signal turned off than

turned on.) This effect is more pronounced with higher

source-and-load impedances.

Above 5MHz, circuit board layout becomes critical, and

it becomes difficult to characterize the response of the

switch independent of the circuit. The graphs shown in

the

Typical Operating Characteristics were taken using a

50Ω source and load connected with BNC connectors.

Power-Supply Sequencing-Free

Operation

Most CMOS switches require specific power-supply

sequencing in order to prevent the devices from latching

up. The older MAX312/MAX313/MAX314 devices require

forth. Otherwise, it becomes necessary to add signal

diodes to the circuit in order to protect it from potential

latchups. The new MAX312L/MAX313L/MAX314L

user to utilize any power-up sequence that is required. It

is, however, important not to exceed the absolute maxi-

mum ratings because stresses beyond the listed ratings

may cause permanent damage to the devices.

Chip Information

TRANSISTOR COUNT: 92

PROCESS: CMOS

PIN (TQFN)

MAX312L

MAX313L

MAX314L

NAME

FUNCTION

7, 9, 17, 19

7, 9, 17, 19

7, 9, 17, 19

IN4, IN3,

IN2, IN1

Logic Inputs

6, 10, 16, 20

6, 10, 16, 20

6, 10, 16, 20

COM4, COM3,

COM2, COM1

Analog Signal Common Terminals

1, 5, 11, 15

——

NC1, NC4,

NC3, NC2

Analog Signal Normally Closed Terminals

—

1, 5, 11, 15

—

NO1, NO4,

NO3, NO2

Analog Signal Normally Open Terminals

—

—

1, 5

NO1, NO4

Analog Signal Normally Open Terminals

—

—

11, 15

NC3, NC2

Analog Signal Normally Closed Terminals

222

V-

Negative Analog Supply Input (connect to GND for single-supply

operation)

4

4

4

GND

Ground

3, 8, 12, 13,

18

3, 8, 12, 13,

18

3, 8, 12, 13,

18

N.C.

No Connection. Not internally connected.

14

14

14

V+

Positive Analog Supply Input

—

—

—

EP

Exposed Pad. Connect EP to V+.

Pin Descriptions (continued)