ISL43240IR Intersil, ISL43240IR Datasheet - Page 8

• Manufacturer Part Number: ISL43240IR
• Description: IC SWITCH QUAD SPDT 20QFN
• Manufacturer: Intersil

Specifications of ISL43240IR

• Function: Switch
• Circuit: 4 x SPDT
• On-state Resistance: 25 Ohm
• Voltage Supply Source: Single, Dual Supply
• Voltage - Supply, Single/dual (±): ±2 V ~ 6 V, 2 V ~ 12 V
• Current - Supply: 0.01µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-VFQFN Exposed Pad
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Test Circuits and Waveforms
Repeat test for all switches.
Detailed Description
The ISL43240 quad analog switches offer precise switching
capability from a bipolar
supply with low on-resistance (18Ω) and high speed
operation (t
especially well suited for portable battery powered
equipment thanks to the low operating supply voltage (2V),
low power consumption (5µW), low leakage currents (5nA
max). High frequency applications also benefit from the wide
bandwidth, and the very high off isolation and crosstalk
rejection.
Supply Sequencing And Overvoltage Protection
With any CMOS device, proper power supply sequencing is
required to protect the device from excessive input currents
which might permanently damage the IC. All I/O pins contain
ESD protection diodes from the pin to V+ and to V- (see
SIGNAL
GENERATOR
SIGNAL
GENERATOR
ANALYZER
ANALYZER
FIGURE 4. OFF ISOLATION TEST CIRCUIT
FIGURE 6. CROSSTALK TEST CIRCUIT
ON
R
R
= 52ns, t
L
0V or 2.4V
L
OFF
±
2V to
NO1 or NC1
COM2
NO or NC
IN
COM
1
= 40ns). The devices are
8
±
6V or a single 2V to 12V
GND
GND
NO2 or NC2
COM1
V+
V+
V-
V-
IN
IN
(Continued)
2
C
C
C
C
0V or 2.4V
0V or 2.4V
CONNECTION
NO
50Ω
ISL43240
Repeat test for all switches.
Figure 8). To prevent forward biasing these diodes, V+ and
V- must be applied before any input signals, and input signal
voltages must remain between V+ and V-. If these conditions
cannot be guaranteed, then one of the following two
protection methods should be employed.
Logic inputs can easily be protected by adding a 1kΩ
resistor in series with the input (see Figure 8). The resistor
limits the input current below the threshold that produces
permanent damage, and the sub-microamp input current
produces an insignificant voltage drop during normal
operation.
Adding a series resistor to the switch input defeats the purpose
of using a low R
added in series with the supply pins to provide overvoltage
protection for all pins (see Figure 8). These additional diodes
limit the analog signal from 1V below V+ to 1V above V-.
V
NX
IMPEDANCE
ANALYZER
R
ON
FIGURE 7. CAPACITANCE TEST CIRCUIT
1mA
= V
1
ON
/1mA
FIGURE 5. R
switch, so two small signal diodes can be
V
1
NO or NC
COM
ON
NO or NC
COM
TEST CIRCUIT
GND
GND
V+
V-
IN
V-
V+
C
IN
C
0.8V or 2.4V
0V or 2.4V