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