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ISL5121IBZ Folha de dados(PDF) 9 Page - Intersil Corporation

Nome de Peças ISL5121IBZ
Descrição Electrónicos  Low-Voltage, Single Supply, Dual SPST, SPDT Analog Switches
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Fabricante Electrônico  INTERSIL [Intersil Corporation]
Página de início  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL5121IBZ Folha de dados(HTML) 9 Page - Intersil Corporation

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9
FN6022.6
November 17, 2004
Detailed Description
The ISL5120–ISL5123 bidirectional, dual analog switches
offer precise switching capability from a single 2.7V to 12V
supply with low on-resistance (19
Ω) and high speed
operation (tON =28ns, tOFF = 20ns). The devices are
especially well suited to portable battery powered equipment
thanks to the low operating supply voltage (2.7V), low power
consumption (5
µW), low leakage currents (100pA max), and
the tiny SOT-23 packaging. 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 GND (See
Figure 8). To prevent forward biasing these diodes, V+ must
be applied before any input signals, and input signal
voltages must remain between V+ and GND. 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 1k
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
FIGURE 4. OFF ISOLATION TEST CIRCUIT
FIGURE 5. RON TEST CIRCUIT
FIGURE 6. CROSSTALK TEST CIRCUIT
FIGURE 7. CAPACITANCE TEST CIRCUIT
Test Circuits and Waveforms (Continued)
ANALYZER
RL
SIGNAL
GENERATOR
V+
C
0V or VINH
NO or NC
COM
INX
GND
V+
C
0.8V or VINH
NO or NC
COM
IN
GND
VNX
V1
RON = V1/1mA
1mA
0V or 2.4V
ANALYZER
V+
C
NO1 or NC1
SIGNAL
GENERATOR
RL
GND
IN1
COM1
IN2
50
0V or VINH
NC
COM2
NO2 or NC2
V+
C
GND
NO or NC
COM
INX
IMPEDANCE
ANALYZER
0V or VINH
ISL5120, ISL5121, ISL5122, ISL5123


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