PI3A288 Datasheet, PDF (7/9 Pages) Pericom Semiconductor Corporation – Ultra-Low-THD Dual-SPDT Analog Switch with Negative Signal Handling Capability

PI3A288
Ultra-Low-THD Dual-SPDT (0.35Ω) Analog Switch
with Negative Signal Handling Capability
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0
10000
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
100000
Crosstalk and Off isolation
1000000
10000000
100000000
1000000000
Freq (Hz)
Off isolation
Off Isolation
Crosstalk
Crosstalk
Frequency (Hz)
Figure12, Crosstalk and Isolation
Typical Application Circuit
GPIO
R1
VCC=1.8V
IN
200 C1
0.1uF
VDD
Negative Swing
NO1
Amplifier
NC1
Negative Swing
Amplifier
NO2
NC2
CT
0.01uF
SSCAP
COM2
COM1
Audio Connector
Figure12, Crosstalk and Isolation
Function Description
The PI3A288 is an ultra-small, ultra-low THD , low on-resistance, high ESD-protected DPDT switch that operates
from a +1.65V to 4.3V supply. These switches feature the low on-resistance (RON) necessary for high-performance
switching applications. The Beyond-the-Rails signal capability of the PI3A288 allows signals below ground and above
VCC to pass without distortion.
Analog Signal Levels
The topology of the switches allows the signal to drop below ground without the need of an external negative voltage
supply. The devices can also withstand analog signal levels of 2Vrms. in the case of lower V_DD voltage.
Digital Control Input
The PI3A288 provides a single-bit control logic input, IN. IN controls the switch position. The logic control inputs can
be driven up to +4.3V regardless of the supply voltage. For example, given a +3.3V supply, the
output enables or select pins may be driven to low to 0V and high to 4.3V.
2015-10-0009
PT0541-4 11/03/15
7