PI5A121/PI5A122/PI5A124
Wide Bandwidth Analog Switches
Features
• Single-Supply Operation (+2V to +6V)
• Rail-to-Rail Analog Signal Dynamic Range
• Low On-Resistance (6Ω typ. with 5V supply)
Minimizes Distortion and Error Voltages
• On-Resistance Flatness, 3Ω typ.
• Low Charge Injection Reduces Glitch Errors. Q = 4pC typ.
• High Speed. t
ON
= 10ns typ.
• Wide -3dB Bandwidth: 326 MHz (typ.)
• High-Current Channel Capability: >100mA
• TTL/CMOS Logic Compatible
• Low Power Consumption (0.5µW typ)
• Small outline transistor package minimizes board area
• Packaging (Pb-free & Green available):
- 5-pin 65-mil wide SOT23 (T) for PI5A121 and PI5A122
- 6-pin 65-mil wide SOT23 (T) for PI5A124
- 5-pin 50-mil wide SC70 (C) for PI5A121/PI5A122
Description
The PI5A121/PI5A122/PI5A124 are analog switches designed
for single-supply operation. These high-precision devices are
ideal for low-distortion audio, video, signal switching and rout-
ing.
The PI5A121 is a single-pole throw (SPST) normally open (NO)
switch. The switch is open when IN is LOW. The PI5A122 is
a single-pole single-throw (SPST) normally closed (NC)
switch.
Each switch conducts current equally well in either direction
when on. When off, they block voltages up to V+.
These switches are fully specified with +5V, and +3.3V supplies.
With +5V, they guarantee <10Ω On-Resistance. On-Resistance
matching between channels is within 2Ω. On-Resistance flatness
is less than 55Ω over the specified range. These switches also
guarantee fast switching speeds (t
ON
<20ns).
These products are available in 5-pin SC70 and/or 6-pin SOT23
plastic packages for operation over the industrial (-40
o
C to +85
o
C)
temperature range.
Applications
•
•
•
•
•
•
•
•
Audio, Video Switching, and Routing
Battery-Powered Communication Systems
Computer Peripherals
Telecommunications
Portable Instrumentation
Mechanical Relay Replacement
Cell Phones
PDAs
Functional Diagrams, Pin Configurations and Truth Tables
PI5A121
COM
1
PI5A122
PI5A124
5 V+
COM
1
5 V+
IN
1
6
NO
5 COM
NO 2
NC 2
V+ 2
GND 3
4 IN
GND 3
4 IN
GND 3
SOT23-6
4
NC
SOT23-5
SC70-5
SOT23-5
SC70-5
Switches shown for Logic “0” input
IN
0
1
PI5A121
OFF
ON
PI5A122
ON
OFF
LOGIC
0
1
1
PI5A124
NC
ON
OFF
NO
OFF
ON
PS8203G
10/19/04
PI5A121/PI5A122/PI5A124
Wide Bandwidth Analog Switch
Absolute Maximum Ratings
Voltages Referenced to Gnd
V+ ..........................................................................-0.5V to +7V
V
IN
, V
COM
, V
NC
, V
NO
(Note 1) ...................-0.5V to V
CC
+2V
or 30mA, whichever occurs first
Current (any terminal)..................................................... ±25mA
Peak Current, COM, NO, NC
(Pulsed at 1ms, 10% duty cycle)..................................... ±25mA
Thermal Information
Continuous Power Dissipation
SOT23-6 (derate 7mW/ºC above +70ºC)........................ 550mW
Storage Temperature .........................................-65ºC to +150ºC
Lead Temperature (soldering, 10s) ................................. +300ºC
Note 1:
Signals on NC, NO, COM, or IN exceeding V+ or GND are clamped by
internal diodes. Limit forward diode current to 30mA.
Caution:
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating
and operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied.
Electrical Specifications - Single +5V Supply
Parameter
Analog Switch
Analog Signal
Range
(3)
On-Resistance
On-Resistance
Match Between
Channels
(4)
On-Resistance Flat-
ness
(5)
NO or NC Off Leak-
age Current
(6)
COM Off Leakage
Current
(6)
COM On Leakage
Current
(6)
V
ANALOG
R
ON
∆R
ON
Symbol
(V+ = +5V ± 10%, GND = 0V, V
INH
= 2.4V, V
INL
= 0.8V)
Conditions
Temp.(°C)
Min.
(1)
Typ.
(2)
Max.
(1)
Units
Full
25
V+ = 4.5V,
I
COM
= -30mA,
V
NO
or V
NC
= +2.5V
V+ = 5V,
I
COM
= -30mA,
V
NO
or V
NC
= 1V, 2.5V, 4V
V+ = 5.5V,
V
COM
= 0V,
V
NO
or V
NC
= 4.5V
V+ = 5.5V, V
COM
= + 4.5V,
V
NO
or V
NC
= ± 0V
V+ = 5.5V,
V
COM
= +4.5V
V
NO
or V
NC
= +4.5V
Full
25
Full
25
Full
25
Full
25
Full
25
Full
0
7.2
0.2
V+
10
12
2
4
2.72
3.5
4
0.18
V
Ω
R
FLAT(ON
)
I
NO(OFF)
or
I
NC(OFF)
I
COM(OFF)
I
COM(ON)
-80
0.20
-80
0.20
-80
80
80
80
nA
2
PS8203G
10/19/04
PI5A121/PI5A122/PI5A124
Wide Bandwidth Analog Switch
Electrical Specifications - Single +5V Supply
(continued)
(V+ = + 5V ± 10%, GND = 0V, V
INH
= 2.4V, V
INL
= 0.8V)
Parameter
Logic Input
Input High Voltage
Input Low Voltage
Input Current with Voltage
High
Input Current with Voltage
Low
Dynamic
Turn-On Time
Turn-Off Time
Charge Injection
(3)
Off Isolation
Crosstalk
(8)
NC or NO Capacitance
COM Off Capacitance
COM On Capacitance
-3dB Bandwidth
Supply
Power-Supply Range
Positve Supply Current
V+
I+
V
CC
= 5.5V, V
IN
= 0V or V+
Full
2
6
1
V
µA
t
ON
V
CC
= 5V, Figure 1
t
OFF
Q
O
IRR
X
TALK
C
(OFF)
C
COM(OFF)
C
COM(ON)
BW
C
L
= 1nF, V
GEN
= 0V,
R
GEN
= 0Ω, Figure 2
R
L
= 50Ω, C
L
= 5pF,
f = 10MHz, Figure 3
R
L
= 50Ω, C
L
= 5pF,
f = 10MHz, Figure 4
f = 1kHz, Figure 5
f = 1kHz, Figure 6
R
L
= 50Ω, Figure 7
Full
25
25
Full
25
Full
1.6
-43
-43
5.5
5.5
13
326
MHz
pF
1
7
15
20
7
10
10
pC
dB
ns
V
IH
V
IL
I
INH
I
INL
Guaranteed logic High Level
Guaranteed logic Low Level
V
IN
= 2.4V, all others = 0.8V
V
IN
= 0.8V, all others = 2.4V
Full
-1
-1
0.005
0.005
2
0.8
1
µA
1
V
Symbol
Conditions
Temp(ºC)
Min.
(1)
Typ.
(2)
Max.
(1)
Units
Notes:
1. The algebraic convention, where most negative value is a minimum and most positive is a maximum, is used in this data sheet.
2. Typical values are for DESIGN AID ONLY, not guaranteed or subject to production testing.
3. Guaranteed by design
4.
∆R
ON
= R
ON
max - R
ON
min
5. Flatness is defined as the difference between the maximum and minimum value of On-Resistance measured.
6. Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at +25ºC.
7. Off Isolation = 20log
10
[ V
COM
/ (V
NO
or V
NC
) ]. See Figure 3.
8. Between any two switches. See Figure 4.
3
PS8203G
10/19/04
PI5A121/PI5A122/PI5A124
Wide Bandwidth Analog Switch
Electrical Specifications - Single +3.3V Supply
(V+ = +3.3V ± 10%, GND = 0V, V
INH
= 2.4V, V
INL
= 0.8V)
Parameter
Analog Switch
Analog Signal Range
(3)
On-Resistance
On-Resistance Match
Between Channels
(4)
On-Resistance Flat-
ness
(3,5)
Dynamic
Turn-On Time
Turn-Off Time
Charge Injection
(3)
Supply
Positve Supply Current
Logic Input
Input High Voltage
Input Low Voltage
Input High Current
Input Low Current
V
IH
V
IL
I
INH
I
INL
Guaranteed logic high level
Guaranteed logic low level
V
IN
= 2.4V, all others = 0.8V
V
IN
= 0.8V, all others = 2.4V
Full
Full
Full
Full
-1
-1
2
0.8
1
1
V
µA
I+
V+ = 3.6V, V
IN
= 0V or V+ All
Channels on or off
Full
1
µA
t
ON
t
OFF
Q
V+ = 3.3V,
V
NO
or V
NC
= 1.5V,
Figure 1
C
L
= 1nF, V
GEN
= 0V,
R
GEN
= 0V, Figure 2
25
Full
25
Full
25
1.3
1.5
15
25
40
12
20
10
pC
ns
V
ANALOG
R
ON
∆R
ON
R
FLAT(ON)
V+ = 3V, I
COM
= -30mA,V
NO
or
V
NC
= 1.5V
V+ = 3.3V, I
COM
= -30mA,
V
NO
or V
NC
= 0.8V, 2.5V
25
Full
25
Full
25
Full
0.5
1
0
12
V+
18
22
1
2
4
5
Ω
V
Symbol
Conditions
Temp.(ºC)
Min.(1)
Typ.(2) Max.(1) Units
4
PS8203G
10/19/04
PI5A121/PI5A122/PI5A124
Wide Bandwidth Analog Switch
Test Circuits/Timing Diagrams
Figure 1. Switching Time
Figure 2. Charge Injection
5
PS8203G
10/19/04
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