ISL43L120 Datasheet, PDF (6/11 Pages) Intersil Corporation – Ultra Low ON-Resistance, Single Supply, Dual SPST Analog Switches

ISL43L120, ISL43L121, ISL43L122
Test Circuits and Waveforms (Continued)
V+
C
SIGNAL
GENERATOR
NO or NC
IN_{X 0V or V+}
R_ON = V₁/100mA
V_NX
NO or NC
1mA
V₁
V+
C
IN
0V or V+
ANALYZER
R_L
COM
GND
COM
GND
FIGURE 3. OFF ISOLATION TEST CIRCUIT
FIGURE 4. R_ON TEST CIRCUIT
SIGNAL
GENERATOR
V+
C
NO1 or NC1
COM1
50Ω
IN₁
0V or V+
IN₂ ^{0V or V+}
ANALYZER
COM2
NO2 or NC2
NC
GND
R_L
IMPEDANCE
ANALYZER
NO or NC
V+
C
IN_X 0V or V+
COM
GND
FIGURE 5. CROSSTALK TEST CIRCUIT
Detailed Description
The ISL43L12X family of devices are bidirectional, single
pole/single throw (SPST) analog switches that offer precise
switching capability from a single 1.65V to 3.6V supply with
low on-resistance (0.16Ω) and high speed operation
(t_ON = 13ns, t_OFF = 13ns). The device is especially well
suited for portable battery powered equipment due to its low
operating supply voltage (1.65V), low power consumption
(2.7µW max), low leakage currents (80nA max), and the tiny
TDFN and MSOP packaging. The ultra low on-resistance and
R_ON flatness provide very low insertion loss and distortion to
application that require signal reproduction.
FIGURE 6. CAPACITANCE TEST CIRCUIT
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 GND (see
Figure 7). To prevent forward biasing these diodes, V+ must
be applied before any input signals, and the 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 1kΩ
resistor in series with the input (see Figure 7). 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.
6
FN6091.1
November 3, 2004