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TS5A3157

10-

Ω SPDT ANALOG SWITCH

SCDS219A – NOVEMBER 2005 – REVISED OCTOBER 2007

PIN DESCRIPTION

PIN NO.

NAME

DESCRIPTION

1

NO

Normally open

2

GND

Digital ground

3

NC

Normally closed

4

COM

Common

5

Power supply

6

IN

Digital control to connect the COM to NO or NC

PARAMETER DESCRIPTION

SYMBOL

DESCRIPTION

Voltage at COM

Voltage at NC

Voltage at NO

Resistance between COM and NC or COM and NO ports when the channel is ON

Leakage current measured at the NC port, with the corresponding channel (NC to COM) in the OFF state

Leakage current measured at the NO port, with the corresponding channel (NO to COM) in the OFF state

Leakage current measured at the NC port, with the corresponding channel (NC to COM) in the ON state and the output

(COM) open

Leakage current measured at the NO port, with the corresponding channel (NO to COM) in the ON state and the output

(COM) open

Leakage current measured at the COM port, with the corresponding channel (COM to NO or COM to NC) in the ON state and

the output (NC or NO) open

Minimum input voltage for logic high for the control input (IN)

Maximum input voltage for logic low for the control input (IN)

Voltage at the control input (IN)

Leakage current measured at the control input (IN)

Turn-on time for the switch. This parameter is measured under the specified range of conditions and by the propagation delay

between the digital control (IN) signal and analog output (COM, NC, or NO) signal when the switch is turning ON.

Turn-off time for the switch. This parameter is measured under the specified range of conditions and by the propagation delay

between the digital control (IN) signal and analog output (COM, NC, or NO) signal when the switch is turning OFF.

Break-before-make time. This parameter is measured under the specified range of conditions and by the propagation delay

between the output of two adjacent analog channels (NC and NO) when the control signal changes state.

Charge injection is a measurement of unwanted signal coupling from the control (IN) input to the analog (NC, NO, or COM)

output. This is measured in coulomb (C) and measured by the total charge induced due to switching of the control input.

Capacitance at the NC port when the corresponding channel (NC to COM) is OFF

Capacitance at the NO port when the corresponding channel (NO to COM) is OFF

Capacitance at the NC port when the corresponding channel (NC to COM) is ON

Capacitance at the NO port when the corresponding channel (NO to COM) is ON

Capacitance at the COM port when the corresponding channel (COM to NC or COM to NO) is ON

Capacitance of control input (IN)

OFF isolation of the switch is a measurement of OFF-state switch impedance. This is measured in dB in a specific frequency,

with the corresponding channel (NC to COM or NO to COM) in the OFF state.

Crosstalk is a measurement of unwanted signal coupling from an ON channel to an OFF channel (NC to NO or NO to NC).

This is measured in a specific frequency and in dB.

BW

Bandwidth of the switch. This is the frequency where the gain of an ON channel is –3 dB below the DC gain.

Total harmonic distortion describes the signal distortion caused by the analog switch. This is defined as the ratio of root mean

THD

square (RMS) value of the second, third, and higher harmonic to the absolute magnitude of fundamental harmonic.

Copyright © 2005–2007, Texas Instruments Incorporated

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