Datasheet


W   
SCDS174B − AUGUST 2004 – REVISED MAY 2005
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13
PIN DESCRIPTION
PIN
NUMBER
NAME DESCRIPTION
1 NO Normally-open terminal
2 GND Digital ground
3 NC Normally-closed terminal
4 COM Common terminal
5 V
+
Power supply
6 IN Digital control pin to connect COM terminal to NO or NC terminals
PARAMETER DESCRIPTION
SYMBOL DESCRIPTION
V
COM
Voltage at COM
V
NC
Voltage at NC
V
NO
Voltage at NO
r
on
Resistance between COM and NC or COM and NO ports, when the channel is ON
r
peak
Peak ON-state resistance over a specified voltage range
∆r
on
Difference of r
on
between channels
r
on(flat)
Difference between the maximum and minimum value of r
on
in a channel over the specified range of conditions
I
NC(OFF)
Leakage current measured at the NC port, with the corresponding channel (NC to COM) in the OFF state under worst-case
input and output conditions
I
NO(OFF)
Leakage current measured at the NO port, with the corresponding channel (NO to COM) in the OFF state under worst-case
input and output conditions
I
NC(ON)
Leakage current measured at the NC port, with the corresponding channel (NC to COM) in the ON state and the output (COM)
being open
I
NO(ON)
Leakage current measured at the NO port, with the corresponding channel (NO to COM) in the ON state and the output (COM)
being open
I
COM(ON)
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) being open
V
IH
Minimum input voltage for logic high for the control input (IN)
V
IL
Minimum input voltage for logic low for the control input (IN)
V
IN
Voltage at IN
I
IH
, I
IL
Leakage current measured at IN
t
ON
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 outputs (COM, NC, or NO) signal, when the switch is turning ON.
t
OFF
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 outputs (COM, NC, or NO) signal, when the switch is turning OFF.
t
BBM
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.
Q
C
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.
Charge injection, Q
C
= C
L
× ∆V
O
, C
L
is the load capacitance, and ∆V
O
is the change in analog output voltage.