Pericom Product Datasheet - PLL Clock Driver for 1.35V/1.5V SSTE

PS323
Precision, Single-Supply
SPST Analog Switch
Features
Description
ÎÎLow On-Resistance (33-ohm typ.) Minimizes Distortion and
The PS323 is a improved high-precision, medium- voltage analog switches designed to operate with single power supplies. The
decive is a dual, single-pole single-throw (SPST), normally open
(NO) switch. The switch conducts current equally well in either
direction when on. In the off state, each switch blocks voltages up
to the power-supply rail.
Error Voltages
ÎÎLow Glitching Reduces Step Errors in Sample-and-Holds.
Charge Injection, 2pC typ.
ÎÎSingle-Supply Operation (+2.5V to +16V)
ÎÎImproved Second Sources for MAX323/MAX324/MAX325
With a +5V power supply, PS323 guarantees <60-ohm On-Resistance. On-Resistance matching between channels is within
2-ohm. On-Resistance flatness is less than 6-ohm over the specified range. All three devices guarantee low leakage currents (<100
pA @ 25oC, <10nA @ +85oC) and fast switching speeds (tON
<150ns). Break-before-make switching action protects against
momentary crosstalk.
ÎÎOn-Resistance Matching Between Channels, <2-ohm
ÎÎOn-Resistance Flatness, <6-ohm max.
ÎÎLow Off-Channel Leakage, <5nA @ +85oC
ÎÎTTL/CMOS Logic Compatible
ÎÎFast Switching Speed, tON <150ns, eliminates momentary
crosstalk
ÎÎRail-to-Rail Analog Signal Dynamic Range
Block Diagram, Pin Configuration, and
Truth Table
ÎÎLow Power Consumption, <5mW
ÎÎPackaging (Pb-free & Green):
àà 8-pin SOIC (W)
àà 8-pin MOSP (U)
PS323
Applications
ÎÎAudio Switching and Routing
ÎÎPortable Instruments
NO1 1
8 V+
COM1 2
7 IN1
6 COM2
IN2 3
ÎÎData Acquisition Systems
5 NO2
GND 4
ÎÎSample-and-Holds
ÎÎTelecommunication Systems
ÎÎBattery-Powered Systems
PS323
Logic
Switch
0
OFF
1
ON
Switches shown for logic “0” input
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02/24/11
PS323
Precision, Single-Supply
SPST Analog Switch
Absolute Maximum Ratings
Parameter
Min.
Max.
-0.3
17
-2
(V+) +2V
Units
Voltages Referenced to GND
V+
VIN, VCOM, VNC , VNO(1)
Current (any terminal)
30
Peak Current, COM, NO, NC (pulsed at 1ms, 10%
duty cycle)
100
ESD per Method 3015.7
>2000
V
mA
V
Continuous Power Dissipation
Plastic DIP (derate 6mW/ °C above +70°C)
500
Narrow SO (derate 6mW/ °C above +70°C)
450
MSOP (derate 4mW/ °C above +70°C)
330
Storage Temperature
-65
150
0
70
Operating Temperature
Lead Temperature (soldering, 10s)
mW
°C
300
Stress beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
Note 1: Signals on NC, NO, COM, or IN exceeding V+ or GND are clamped by internal diodes. Limit forward diode current to 30mA maximum.
Electrical Specifications - Single +5V Supply (V+ = 5V +10%, GND = 0V, VINH = 2.4V, VINL= 0.8V)
Parameters
Symbol
Conditions
Temp (°C)
Min(1)
Typ(2)
Max(1)
Units
V+
V
Analog Switch
Analog Signal Range(3)
VANALOG
On-Resistance
RON
V+ = 4.5V,
VNO or VNC = +3.5V
ICOM = 1mA
On-Resistance Match Between Channels(4)
ΔRON
VNO or VNC = +3V,
ICOM = 1mA,
V+ = 5V
On-Resisatance Flatness(5)
R FLAT(ON)
V+ = 5V,
ICOM = 1mA,
VNO or VNC = 1V, 2V, 3V
NO or NC Off Leakage
V+ = 5.5V,
INO(OFF) or
VCOM = 1V,
INC(OFF)
VNO or VNC = 4.5V
Current(6)
0
COM Off Leakage Current(6)
ICOM(OFF)
V+ = 5.5V,
VCOM = 4.5V,
VNO or VNC = 1V
COM On Leakage Current(6)
ICOM(ON)
V+ = 5.5V,
VCOM = 5V,
VNO or VNC = 5V
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11-0001
25
20
35
Full
30
60
25
0.8
2
Full
2
4
25
2
Full
ohm
6
8
25
-0.1
Full
-5
25
-0.1
Full
-5
25
-0.2
Full
-10
-0.01
0.1
5
-0.01
0.1
5
-0.04
nA
0.2
10
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PS323
Precision, Single-Supply
SPST Analog Switch
Logic Input
Input Current with Input
Voltage High
IINH
VIN = 2.4V, all others =
0.8V
Input Current with Input
Voltage High
IINL
VIN = 2.4V, all others =
2.4V
Logic High Input Voltage
VINH
Logic Low Input Voltage
VINL
Full
-0.05
0.005
0.5
μA
-0.05
0.005
0.5
2.4
0.8
V
Dynamic
Turn-On Time(3)
tON
Turn-Off Time(3)
tOFF
Break-Before-Make Time
Delay(3)
tD
Charge Injection(3)
Q
Off Isolation(7)
OIRR
R L = 500-ohm, CL = 5pF,
f =1MHz, Figure 5
Crosstalk
XTALK
R L = 500-ohm, CL = 5pF,
f =1MHz, Figure 6
NC or NO Off Capacitance
C(OFF)
COM Off Capacitance
CCOM(OFF)
COM Off Capacitance
CCOM(ON)
VNO or VNC = 3V, Figure
2
25
30
75
Full
60
150
25
25
50
Full
50
100
R L = 300-ohm, CL =
35pF, Figure 3
2
CL = 1nF, VGEN = 0V,
5
1
RGEN = 0-ohm, Figure 4
ns
5
pC
-72
25
dB
-84
9
f =1MHz, Figure 7
9
f =1MHz, Figure 8
pF
22
Supply
Power-Supply Range
V+
Positive Supply Current
I+
V+ = 5.5V, VIN = 0V or
V+, all channels on or off
Full
2.7
16
V
-1
1
μA
Notes:
1. The algebraic convention, where the most negative value is a minimum and the 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. DRON =RON max - RON 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 = 20log10 [ VCOM / (V NC or V NO) ]. See Figure 5.
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PS323
Precision, Single-Supply
SPST Analog Switch
Electrical Specifications - Single +3.3V Supply (V+ = 3.3V +10%, GND = 0V, VINH = 2.4V, VINL= 0.8V)
Parameters
Symbol
Conditions
Temp (°C)
Min(1)
Typ(2)
Max(1)
Units
V+
V
Analog Switch
Analog Signal Range(3)
VANALOG
On-Resistance
RON
0
V+ = 3V,
ICOM = 1mA
VNO or VNC = 1.5V
25
40
70
Full
50
80
25
50
125
Full
100
250
25
30
75
Full
60
150
25
1
5
pC
0.01
1
μA
ohm
Dynamic
Turn-On Time(3)
tON
Turn-Off Time(3)
tOFF
Charge Injection(3)
Q
VNO or VNC = 1.5V,
Figure 2
CL = 1nF, VGEN = 0V,
RGEN = 0-ohm, Figure 4
ns
Supply
Positive Supply Current
I+
V+ = 3.6V, VIN = 0V or
V+, all channels on or off
Full
-1
Electrical Specifications - Single +12V Supply (V+ = 12V +10%, GND = 0V, VINH = 4V, VINL= 0.8V)
Parameters
Symbol
Conditions
Temp (°C)
Min(1)
Typ(2)
Max(1)
Units
V+
V
Analog Switch
Analog Signal Range(3)
VANALOG
On-Resistance
RON
0
V+ = 10.8V,
ICOM = 1mA
VNO or VNC = 110V
25
15
25
Full
20
40
25
25
50
Full
50
100
25
20
40
Full
40
75
25
1
5
pC
0.01
1
μA
ohm
Dynamic
Turn-On Time(3)
tON
Turn-Off Time(3)
tOFF
Charge Injection(3)
Q
VNO or VNC = 1.5V,
Figure 2
CL = 1nF, VGEN = 0V,
RGEN = 0-ohm, Figure 4
ns
Supply
Positive Supply Current
I+
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V+ = 13V, VIN = 0V or
V+, all channels on or off
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-1
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PS323
Precision, Single-Supply
SPST Analog Switch
Application Information
Power-Supply Considerations
The PS323 dual analog switch precisely switches inputs with a single
2.7V to 12V supply, low On-Resistance (30-ohm) and high speed operation (tON = 85ns, tOFF = 25ns). The devices are suited to portable
battery powered equipment due to a low supply voltage (2.7V), low
power consumption (5mW), and low leakage currents (0.1nA). High
frequency applications benefit from the high bandwidth, high off
isolation, and low crosstalk.
The PS323 construction is typical of most CMOS analog switches,
except that they have voltage supply pins: V+ and GND. These pins
power the internal CMOS switches and set the analog voltage limits. Unlike switches with a 12V maximum supply voltage, the PS323
is made from a 17V-supply voltage technology that provides room
for 10-20% tolerance on 12V supplies. This technology gives room
for overshoot and noise spikes. While the minimum recommended
supply voltage is 2.7V, it is important to note that the input signalrange, switching times, and on-resistance degrade at lower supply
voltages. Refer to the electrical specifications for details. V+ and
GND also power the internal logic drivers (turn the switch on & off).
These switches can be operated with bipolar supplies if the voltage
range from V- (at the GND pin) to V+ does not exceed a total of 12V.
Proper Power Supply Sequencing & Over-voltage
Protection With any CMOS device, proper power supply sequencing is needed to protect the device from excessive input currents,
which may permanently damage the IC. All I/O pins contain ESD
protection diodes from the pin to V+ and to GND (see Figure 9 below). To prevent forward biasing of these diodes, V+ must be applied
before any input signals, and input signals must swing between V+
and GND. If these conditions cannot be guaranteed, then one of two
suggested protection methods must be employed. Protect the logic
inputs by adding a 1k-ohm resistor in series with the input (see Figure 9). The resistor limits the currents below the threshold that can
cause permanent damage to sub-micro Amp levels. This reduced input current produces an insignificant voltage drop during normal
operation. A series resistor is not desirable, but small-signal diodes
can be added in series with the supply pins to provide over-voltage
protection for the IC. The diodes limit the analog signal from 1V
below V+ to 1V above GND. The leakage current will remain low, but
the switch resistance may increase at low supply voltages.
Logic-Level Thresholds
The switch logic is TTL compatible (0.8V & 2.4V) over a supply
range of 3V to 11V. At 12V the VIH level is about 2.5V. This is below
the TTL guaranteed high output minimum level of 2.8V, but noise
margin is reduced. For best results with a 12V supply, use logic drive
that provides a VOH greater than 3V. The digital input stages draw
supply current whenever the digital input voltage is not at one of the
supply rails. Driving the digital input signals from GND to V+ with
a fast transition time minimizes power dissipation.
High-Frequency Signal Passing/Isolation
In 50-ohm systems, signal response is flat even past 300MHz. An
OFF switch is like a capacitor and passes high frequencies with low
attenuation, resulting in signal passing from the switch input to
output. OFF Isolation is the resistance to passing signals while the
switch is OFF, while Crosstalk indicates the amount of signal noise
that crosses over from one switch to another. The OFF Isolation is
about 50dB in 50-ohm systems. Larger load impedances reduce
Off Isolation and Crosstalk due to the voltage divider action of the
switch OFF impedance and the load.
Positive Supply
V+
NO
Leakage Current
Reverse ESD protection diodes are internally connected between
each analog-signal pin and both V+ and GND. One of these diodes
conducts if any analog signal exceeds V+ or GND.
COM
Most of the analog leakage current comes from the ESD diodes to V+
or GND. Although the ESD diodes on a given signal pin are identical
and therefore fairly well balanced, they are reverse biased differently.
Either V+ or GND and the analog signal bias each diode. Hence,
leakage currents will vary as the signal varies. The difference in the
diode leakage currents to the V+ and GND pins creates the analog
signal-path leakage current. Also, analog leakage currents flow between each pin and one of the supply terminals, not to the other
switch terminal. This is why both sides of a given switch can show
leakage currents of the same or opposite polarity. There is no connection between the analog-signal paths and V+ or GND.
Vg
V-
Figure 1. Overvoltage Protection
Figure 1. Overvoltage Protection
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PS323
Precision, Single-Supply
SPST Analog Switch
Test Circuits/Timing Diagrams
+5V
V+
NO
or NC
COM
V COM = 3V
V OUT
IN
Logic
Input
CL
35pF
RL
1kohm
GND
Logic +3V
Input
0V
tr <20ns
tf <20ns
50%
tOFF
Switch
Output
V OUT
90%
90%
0V
tON
C L INCLUDES FIXTURE AND STRAY CAPACITANCE
RL
V OUT = V COM
R L + R ON
(
LOGIC INPUT WAVEFORMS INVERTED FOR
SWITCHES THAT HAVE OPPOSITE LOGIC
)
Figure 2. Switching Time
Figure 2. Switching Time
V+
Logic
Input
V+
NC
+3V
VOUT
NO
RL
300Ω
IN
Logic
Input
+3V
50%
0V
CL
35 pF
ohm
GND
Switch
Output
(VOUT)
CLINCLUDES FIXTURE AND STRAY CAPACITANCE.
90%
90%
0V
tD
Figure 3. Break-Before-Make Interval (PS325 only)
Figure 3. Break-Before-Make Interval (PS325 only)
+5V
RGEN
V+
NO or
NC
COM
VGEN
VOUT
IN
CL
OFF
OFF
ON
1nF
IN
Logic
Input
∆VOUT
VOUT
GND
IN
OFF
ON
OFF
Q = (∆VOUT)(CL)
IN POLARITY DEPENDS ON NO OR NC SWITCH FUNCTION
Figure 4. Charge Injection
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PS323
Precision, Single-Supply
SPST Analog Switch
10nF
+5V
Signal
Generator 0dBm
V+
COM
IN
COM
Analyzer
RL
0V or
2.4V
NC
or NO
Ω
RL
Figure 5. Off Isolation
COM
Capacitance
Meter
f = 1MHz
IN2
0V or
2.4V
COM2
N02
NC
GND
50ohm
Figure 6. Crosstalk
+5V
10nF
V+
IN
NC
or NO
Capacitance
Meter
0V or
2.4V
f = 1MHz
GND
COM
+5V
V+
IN
NC
or NO
0V or
2.4V
GND
Figure 7. Channel-Off Capacitance
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50ohm
N01
IN1
COM
Analyzer
V+
COM1
0V or
3.5V
GND
10nF
+5V
10nF
Figure 8. Channel-On Capacitance
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PS323
Precision, Single-Supply
SPST Analog Switch
Typical Performance Curves (TA = 25°C unless otherwise noted)
Figure 9. On Resistance vs. Supply Voltage
70.0
R ON (Ohm)
56.0
42.0
28.0
14.0
0
0
0.6V
1.2V
1.8V
V IN (V)
2.4V
3.0V
Figure 10. On Resistance vs. Switch Voltage, V CC = 3.3V
Figure 10. On Resistance vs. Switch Voltage, VCC = 3.3V
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PS323
Precision, Single-Supply
SPST Analog Switch
40.0
R ON (Ohm)
32.0
24.0
16.0
8.0
0
0
1.0V
2.0V
3.0V
V IN (V)
4.0V
5.0V
Figure 11. On Resistance vs. Switch Voltage, VCC = 5V
20.0
R ON (Ohm)
16.0
12.0
8.0
4.0
0
0
2.4V
4.8V
7.2V
V IN (V)
9.6V
12V
Figure 12. On Resistance vs. Switch Voltage, VCC = 12V
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PS323
Precision, Single-Supply
SPST Analog Switch
Charge Injection vs Switch Voltage
10.00
5V
3.3V
9.00
12V
8.00
7.00
Q (pC)
6.00
5.00
4.00
3.00
2.00
1.00
0.00
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
6
7
8
9
10
11
12
Vcom, V
Figure 13. Charge Injection vs. Switch Voltage
Figure 13. Charge Injection vs. Switch Voltage
Digital Switching Point vs. Supply Voltage
3.5
VIL @ -40C
VIL @ 90C
VIH @ -40C
VINH and VINL (V)
3
VIL @ 25C
VIH @ 25C
VIH @ 90C
2.5
2
1.5
1
0.5
2
3
4
5
6
7
8
9
10
11
12
13
V+, (V)
Figure 14. Digital Switching point vs. Supply Voltage
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PS323
Precision, Single-Supply
SPST Analog Switch
Packaging Mechanical: 8-Pin SOIC (W)
DOCUMENT CONTROL NO.
PD - 1001
8
REVISION: F
.149
.157
DATE: 03/09/05
3.78
3.99
.0099
.0196
0.25
x 45˚
0.50
1
.189
.196
4.80
5.00
.0075
.0098
0-8˚
0.19
0.25
0.40 .016
1.27 .050
1
.016
.026
0.406
0.660
1.35
1.75
.053
.068
SEATING PLANE
REF
.050
BSC
1.27
.0040
.0098
.2284
.2440
5.80
6.20
0.10
0.25
.013 0.330
.020 0.508
Pericom Semiconductor Corporation
3545 N. 1st Street, San Jose, CA 95134
1-800-435-2335 • www.pericom.com
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
Notes:
1) Controlling dimensions in millimeters.
2) Ref: JEDEC MS-012D/AA
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DESCRIPTION: 8-Pin, 150-Mil Wide, SOIC
PACKAGE CODE: W
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PS323
Precision, Single-Supply
SPST Analog Switch
Packaging Mechanical: 8-Pin MSOP (U)
.003
.012
0.07
0.30
15˚ Max.
.003
.012
0.07
0.30
Gauge
Plane
.010
0.25
.016
.028
0.40
0.70
15˚ Max.
.037
0.95
REF
0˚- 6˚
Detail A
.112 2.85
.120 3.05
15˚ MAX
Detail A
.114 2.90
.122 3.10
15˚ MAX
.114 2.90
.122 3.10
Ordering Information
Ordering Code
Package Code
Package Type
PS323ESAE
W
Pb-free & Green, 8-pin SOIC
PS323CUAE
U
Pb-free & Green, 8-pin MSOP
1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
Pericom Semiconductor Corporation • 1-800-435-2336
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