Page 1
PS394
Precision, Quad, SPDT, 17V Analog Switch
Features
Low On-Resistance (17 Ohm typ.) Minimizes Distortion
and Error Voltages
Low Glitching Reduces Step Errors and Improves
Settling Times. Charge Injection: <10pC
Dual-Supply Operation (±2.7V to ±8V)
Single-Supply Operation (+2.7V to +15V)
Improved Second Sources for MAX394
On-Resistance Matching Between Channels: <2 Ohm
On-Resistance Flatness: 4 Ohm (Max.)
Low Off-Channel Leakage, I
NO(OFF)
< 2.5nA @ +85°C
TTL/CMOS Logic Compatible (w/ +5V or ±5V supplies)
Break-Before-Make action eliminates momentary crosstalk
Rail-to-Rail Analog Signal Range
Narrow SOIC and QSOP Packages Minimize Board Area
Applications
Data Acquisition Systems
Audio Switching and Routing
Test Equipment
PBX, PABX
Telecommunication Systems
Battery-Powered Systems
Description
The PS394 is a precision, low-voltage, quad, single-pole/doublethrow (SPDT) analog switch. The four independent switches operate with bipolar supplies ranging from ±2.7V to ±8V, or with a single
supply of +2.7V to +15V. The PS394 offers low On-resistance (less
than 35 Ohm), guaranteed to match within 2 Ohm between channels
and to remain flat over the analog signal range (4 Ohm Max.). It also
offers break-before-make switching (10ns typical), with turn-off
times less than 75ns and turn-on times less than 130ns. The PS394
is ideal for portable operation since quiescent current runs less than
1µA with all inputs high or low.
This monolithic, quad switch is fabricated using Pericoms 17V
silicon-gate process. Design improvements guarantee extremely low
charge injection (10pC), low power consumption (10µW), and electrostatic discharge (ESD) greater than 2000V.
Logic Inputs are TTL and CMOS compatible and guaranteed over
a +0.8V to +2.4V range. Logic inputs and switched analog signals can
range anywhere between the supply voltages without damage.
Pin Configuration
1
IN1
2
NO1
NC1
GND
NC2
NO2
IN2
3
4
5
V-
6
7
8
9
10
COM1
COM2
20
19
18
17
16
15
14
13
12
11
IN4
NO4
COM4
NC4
V+
N.C.
NC3
COM3
NO3
IN3
Pin Description
1
emaNnoitcnuF
4NI-1NIstupnIsleveL-cigoL
4ON-1ONsechtiwSnepOyllamroN
4MOC-1MOCseloPhctiwSnommoC
4CN-1CNsehctiwSdesolCyllamroN
VylppuSrewoPevitageN
DNGdnuorG
.C.NdetcennoCyllanretnItoN
+VylppuSrewoPevitisoP
PS8444 01/13/00
Page 2
PS394
+5V
+5V
D1
D1
V+
V–
COM NO or NC
*
*
*
*
*Internal Protection Diodes
Precision, Quad, SPDT, 17V Analog Switch
Absolute Maximum Ratings
Voltages Referenced to GND
V+ .................................................................... 0.3V to +17V
V .................................................................... +0.3V to 17V
V+ to V .......................................................... 0.3V to +17V
COM_, NO_, NC_, IN_
or 30mA, whichever occurs first
Continuous Current, Any Pin ...................................... 30mA
Peak Current, Any Pin
(pulsed at 1ms, 10% duty cycle max.) ..................... 100mA
Continuous power Dissipation (TA = +70°C)
Plastic DIP (derate 10.53mW/°C above +70°C) ..... 842mW
Narrow SO (derate 8.70mW/°C above +70°C) ...... 696mW
Operating Temperature Ranges
PS394C_P ...................................................... 0°C to +70°C
PS394E_P .................................................. 40°C to +85°C
Storage Temperature Range .......................65°C to +150°C
Lead Temperature (soldering, 10sec) ......................... +300°C
Note 1:
Signals on NC, NO, COM, or IN exceeding V+ or V are clamped
by internal diodes. Limit forward diode current to maximum
current rating.
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.
(1)
....................... (V 2V) to (V+ +2V)
CAUTION
Applications Information
Operation with Supply Voltages Other than ±5V
The PS394 switch operates with ±2.7V to ±8V bipolar supplies and
a +2.7V to +15V single supply. In either case, analog signals ranging
from V+ to V- can be switched. The Typical Operating Character-
istics graphs show the typical on-resistance variation with analog
signal and supply voltage. The usual on-resistance temperature
coefficient is 0.5%/°C (typ).
Power-Supply Sequencing and Overvoltage Protection
Do not exceed the absolute maximum ratings, because stresses
beyond the listed ratings may cause permanent damage to the
device. Proper power-supply sequencing is recommended for all
CMOS devices. Always apply V+, followed by V- (when using split
supplies) before applying analog signals or logic inputs, especially
if the analog or logic signals are not current-limited. If this sequencing is not possible and if the analog or logic inputs are not current
limited to less than 30mA, add a single diode (D1) for single-supply
operation (Figure 1). If using dual supplies or if the analog signal can
dip below ground in single-supply operation, add two small signal
diodes (D1, D2), as shown in Figure 1. Adding protection diodes
reduces the analog signal range to a diode drop above V- for D2.
Leakage is not affected by adding the diodes. On-resistance
increases by a small amount at low supply voltages. Maximum
supply voltage (V- to V+) must not exceed 17V.
Adding diodes D1 and D2 also protects against some overvoltage
situations. With the circuit of Figure 1, if the supply voltage is below
the absolute maximum rating and if a fault voltage up to the absolute
maximum rating is applied to an analog signal pin, no damage will
result. For example, with ±5V supplies, analog signals up to ±8.5V will
not damage the circuit of Figure 1. If only a single fault signal is
present, the fault voltage can go to +12V or -12V without damage.
Figure 1. Overvoltage Protection using Blocking Diodes
2
PS8444 01/13/00
Page 3
Electrical Characteristics Dual Supplies
(V+ = 5V ± 10%, V = 5V ± 10%, GND = 0V, V
INH
= 2.4V, V
= 0.8V, TA = T
INL
PS394
Precision, Quad, SPDT, 17V Analog Switch
MIN
to T
, unless otherwise noted.)
MAX
retemaraPlobmySsnoitidnoC
hctiwS
V
egnaRlangiSgolanA
ecnatsiseR-nOR
,MOC
V
,ONVCN
V
NO
I
V
hctaMecnatsiseR-nO
∆R
)4(
slennahCneewteB
ecnatsiseR-nO
)4(
ssentalF
ONroCNffO
tnerruCegakaeL
egakaeLMOC
)5(
tnerruC
R
I
)5(
I
I
V
I
NO
V
I
)NO(TALF
V
)FFO(CN
ro
V
)FFO(ON
V
V
)NO(MOC
tupnIcigoLlatigiD
.pmeT
egnaR
)2(
.niM
)2(
.pyT
)2(
.xaM
)3eton(V+VV
,V5.4=V,V5.4=+V
Vro
CN
ON
MOC
V8.0=
LNI
Vro
CN
ON
MOC
,V5.3±=
V,Am01=
HNI
,V4.2=
,V3±=
,Am01=
V5=V,V5=+V
Vro
CN
ON
MOC
,Am01=
V5=V;V5=+V
V,V5.4±=
MOC
ON
ro
CN
,V5.5=+V,V5.4±=
V5.5=V
T
A
T
A
T
A
T
A
;V3,V0,V3+=
T
A
T
A
T
A
T
A
C°52+=E,C0253
T=
Tot
NIM
XAM
E,C54
C°52+=E,C5.02
T=
Tot
NIM
XAM
E,C4
C°52+=E,C4
T=
Tot
NIM
XAM
E,C6
C°52+=E,C2.010.02.0
T=
Tot
NIM
XAM
E,C5.25.2
An
MOC
CN
,V5.4±=
Vro
ON
,V5.4±=
V5.5=V,V5.5=+V
T
A
T
A
C°52+=E,C4.040.04.0
T=
Tot
NIM
XAM
E,C0.50.5
stinU
mhO
htiwtnerruCtupnI
hgiHegatloVtupnI
I
HNI
V
NI
V8.0=srehtolla,V4.2=0.1500.00.1
Aµ
htiwtnerruCtupnI
woLegatloVtupnI
tupnIhgiHcigoL
egatloV
I
LNI
V
H_A
V
NI
V4.2=srehtolla,V8.0=0.1500.00.1
TAT=
Tot
NIM
XAM
4.2
V
tupnIwoLcigoL
egatloV
V
L_A
TAT=
Tot
NIM
XAM
8.0
3
3
PS8444 01/13/00
Page 4
Electrical Characteristics Dual Supplies (continued)
(V+ = 5V ± 10%, V = 5V ± 10%, GND = 0V, V
retemaraPlobmySsnoitidnoC
cimanyD
= 2.4V, V
INH
= 0.8V, TA = T
INL
PS394
Precision, Quad, SPDT, 17V Analog Switch
MIN
to T
, unless otherwise noted.)
MAX
.pmeT
egnaR
)2(
.niM
)2(
.pyT
)2(
.xaM
stinU
emiT-nO-nruTt
emiT-ffo-nruTt
ekaM-erofeB-kaerB
)3(
yaleDemiT
)3(
noitcejnIegrahC
)6(
noitalosIffO
)7(
klatssorC
ecnaticapaCffOC
ecnaticapaCffOMOCC
nOlennahC
ecnaticapaC
NO
FFO
t
D
V
ETC
V
OSI
V
TC
FFO
)FFO(MOC
C
)NO(MOC
ylppuS
egnaRylppuS-rewoP 4.2±8±V
ylppuSevitisoP
tnerruC
ylppuSevitageN
tnerruC
+IV,V5.5=V,V5.5=+V,fforonoslennahcllA
IV,V5.5=V,V5.5=+V,fforonoslennahcllA
T
V
MOC
V
MOC
2erugiF,V3=
2erugiF,V3=
5erugiFT
C
L
R
NEG
R
L
V,Fn0.1=
,V0=
NEG
6erugiF,mhO0=
C,mhO05=
,Fp5=
L
3erugiF,zHM1=f
A
T=
T
A
T
A
T=
T
A
A
T
A
T
A
C°52+=28031
Tot
NIM
XAM
C°52+=7557
Tot
NIM
XAM
C°52+=201
C°52+=501Cp
C°52+=66
571
sn
001
mBd
R
L
C,mhO05=
,Fp5=
L
8erugiF,zHM1=f
3erugiF,zHM1=fT
3erugiF,zHM1=fT
4erugiF,zHM1=fT
T
A
A
A
A
C°52+=88
C°52+=21
C°52+=21
C°52+=93
NI
Fp
+VroV0=0.160.00.1
Aµ
NI
+VroV0=0.110.00.1
4
PS8444 01/13/00
Page 5
Electrical Characteristics Single +5V Supply
(V+ = 5V ± 10%, V = 0V, GND = 0V, V
INH
= 2.4V, V
INL
= 0.8V, TA = T
MIN
Precision, Quad, SPDT, 17V Analog Switch
to T
, unless otherwise noted.)
MAX
PS394
retemaraPlobmySsnoitidnoC
hctiwS
V
egnaRlangiSgolanA
ecnatsiseR-nOR
,MOC
V
V
,ON
CN
V
NO
I
V
hctaMecnatsiseR-nO
∆R
)4(
slennahCneewteB
ecnatsiseR-nO
)4(
ssentalF
ONroCNffO
tnerruCegakaeL
egakaeLMOC
)8(
tnerruC
R
I
)8(
I
I
V
I
NO
V
I
)NO(TALF
V
)FFO(CN
V
ro
)FFO(ON
V
V
)NO(MOC
tupnIcigoLlatigiD
.pmeT
egnaR
)2(
.niM
)2(
.pyT
)2(
.xaM
)3eton(V0+VV
,V0=V,V0.5=+V
Vro
CN
ON
MOC
V8.0=
LNI
Vro
CN
ON
MOC
,V5.3=
V,Am0.1=
HNI
,V3=
,Am0.1=
V5=+V
Vro
CN
ON
MOC
;Am0.1=
V1,V2,V3=
V0=V,V5=+V
,V0=
MOC
Vro
CN
ON
,V5.4=
V0=V,V5.5=+V
T
A
,V4.2=
T
A
T
A
TAT=
T
A
TAT=
T
A
T
A
C°52+=E,C5256
T=
Tot
NIM
XAM
E,C
C°52+=E,C
Tot
NIM
XAM
E,C
C°52+=E,C
Tot
NIM
C°52+=E,C
T=
Tot
NIM
XAM
XAM
E,C
2.010.02.0
E,C
5.25.2
57
5.02
4
6
8
An
MOC
CN
,V5.4=
Vro
ON
,V5.4=
V0=V,V5.5=+V
T
A
T
A
C°52+=E,C4.040.04.0
T=
Tot
NIM
XAM
E,C0.50.5
stinU
mhO
htiwtnerruCtupnI
hgiHegatloVtupnI
I
HNI
V
NI
V8.0=srehtolla,V4.2=0.1500.00.1
Aµ
htiwtnerruCtupnI
woLegatloVtupnI
I
LNI
V
NI
V4.2=srehtolla,V8.0=0.1500.00.1
cimanyD
T
)3(
emiT-nO-nruT
)3(
emiT-ffo-nruT
ekaM-erofeB-kaerB
)3(
yaleDemiT
)3(
noitcejnIegrahC
t
NO
t
FFO
t
D
V
ETC
V
MOC
V
MOC
C
L
V,Fn0.1=
R
NEG
2erugiF,V3=
2erugiF,V3=
,V0=
NEG
mhO0=
A
T
A
T
A
T
A
T
A
T
A
C°52+=061052
T=
Tot
NIM
XAM
C°52+=06521
T=
Tot
NIM
XAM
C°52+=502
C°52+=35Cp
003
sn
571
ylppuS
egnaRylppuS-rewoP+V 4.261V
ylppuSevitisoP
tnerruC
+IV,fforonoslennahcllA
NI
V0=V,V5.5=+V,+VroV0=0.110.00.1
Aµ
ylppuSevitageN
tnerruC
IV,fforonoslennahcllA
NI
V0=V,V5.5=+V,+VroV0=0.110.00.1
5
5
PS8444 01/13/00
Page 6
Electrical Characteristics Single +3.3V Supply
(V+ = 3.0V to 3.6V, GND = 0V, V
INH
= 2.4V, V
= 0.8V, TA = T
INL
MIN
to T
Precision, Quad, SPDT, 17V Analog Switch
, unless otherwise noted.)
MAX
PS394
retemaraPlobmySsnoitidnoC
hctiwS
V
egnaRlangiSgolanA
ecnatsiseR-nOR
,MOC
V
,ONVCN
V
NO
I
V
ONroCNffO
)8(
tnerruC
)8(
tnerruCegakaeL
egakaeLMOC
I
I
I
V
)FFO(CN
ro
V
)FFO(ON
V
V
)NO(MOC
tupnIcigoLlatigiD
htiwtnerruCtupnI
hgiHegatloVtupnI
htiwtnerruCtupnI
woLegatloVtupnI
I
HNI
I
LNI
cimanyD
.pmeT
egnaR
)2(
.niM
)2(
.pyT
)2(
.xaM
)3eton(V0+VV
,V0=V,V3=+V
Vro
CN
ON
MOC
V8.0=
LNI
MOC
Vro
CN
ON
,V5.1=
V,Am0.1=
HNI
,V0=
,V3=
V0=V,V6.3=+V
T
A
,V4.2=
T
A
T
A
T
A
C°52+=E,C57581
T=
Tot
NIM
C°52+=E,C
T=
Tot
NIM
XAM
XAM
E,C
2.010.02.0
E,C
5.25.2
052
An
,V3=
MOC
Vro
CN
,V3=
ON
V0=V,V6.3=+V
V
NI
T
A
T
A
C°52+=E,C4.040.04.0
T=
Tot
NIM
XAM
E,C0.50.5
V8.0=srehtolla,V4.2=0.1500.00.1
Aµ
V
NI
V4.2=srehtolla,V8.0=0.1500.00.1
stinU
mhO
)3(
emiT-nO-nruT
)3(
emiT-ffo-nruT
ekaM-erofeB-kaerB
)3(
yaleDemiT
)3(
noitcejnIegrahC
t
NO
t
FFO
t
D
V
ETC
V
MOC
V
MOC
C
L
R
V,Fn0.1=
NEG
mhO0=6erugiF
2erugiF,V5.1=T
2erugiF,V5.1=T
5erugiFT
,V0=
NEG
A
A
A
T
A
C°52+=004
C°52+=
C°52+=502
C°52+=15Cp
051
ylppuS
egnaRylppuS-rewoP+V 7.261V
ylppuSevitisoP
tnerruC
ylppuSevitageN
tnerruC
+IV,fforonoslennahcllA
IV,fforonoslennahcllA
NI
NI
V0=V,V6.3=+V,+VroV0=0.110.00.1
V0=V,V6.3=+V,+VroV0=0.110.00.1
Notes:
2. The algebraic covention, where the most negative value is a minimum and the most positive value a maximum, is used in this data sheet.
3. Guaranteed by design
4. ∆RON = ∆R
ON(MAX)
. On-resistance match between channels and flatness are guaranteed only with specified voltages. Flatness is defined as the
difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range.
5. Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temperature.
6. See Figure 6. Off isolation = 20log10 V
COM/VNC
or VNO, V
= output, VNC or NO = input to off switch
COM
7. Between any two switches. See Figure 3.
8. Leakage testing at single supply is guaranteed by testing with dual supplies.
sn
Aµ
6
PS8444 01/13/00
Page 7
Test Circuits/Timing Diagrams
Capacitance
Meter
C
C
IN
COM
+5V
–5V
V+
V–
NC
or
NO
GND
0V or 2.4V
tR < 20ns
t
< 20ns
F
50% 50%
t
OFF
t
OPEN
50% 50%
50% 50%
t
ON
V
V
IN
COM
3V
0V
+10V
0V
–10V
t
OFF
Precision, Quad, SPDT, 17V Analog Switch
t
ON
t
OPEN
Figure 2. Switching-Time Circuit
+10V
–10V
Logic
Input
NC_
COM_
NO_
IN_
V+ GND V–
+15V
(Repeat Test for IN2, IN3, and IN4)
–15V
PS394
Switch Output
300 Ohm
Capacitance
Meter
Logic
Input
Switch
Output
Switch
Output
+5V
C
V+
COM
NC
or
NO
GND
Figure 3. Channel Off Capacitance
+3V
50%
0V
V
COM
V
V
0V
COM
0V
O2
V
O2
t
D
0.9V
IN
_0V or 2.4V
V–
C
–5V
0
Logic
Input
0.9V
0
t
D
CL Includes Fixture and Stray Capacitance.
Logic 0 Input
Figure 5. Break-Before-Make Delay
7
7
Figure 4. Channel On Capacitance
+5V
V+
COM_
IN_
GND
NO
NC
V–
–5V
V
O2
R
L2
V
R
L1
C
C
L2
RL = 1kOhm
C
= 35pF
L
PS8444 01/13/00
O1
L1
Page 8
V
R
GEN
GEN
COM_
GND
+5V
V+
NC or NO
IN_
V–
C
L
10nF
PS394
Precision, Quad, SPDT, 17V Analog Switch
∆V
0
V
V
0
0
IN_
ON ONOFF
Signal
Generator
Analyzer
CH A
CH B
R
L
50Ω
C
COM_
NC_ or
NO_
GND
+5V
V+
–5V
–5V
V–
Figure 6. Charge Injection
0V,
IN_
2.4V
C
C = 5pF
Figure 7. Off Isolation
detseT
zHM1
ycneuqerF
V
ISO
Q = (∆V
= 20LOG
)(CL)
0
langiS
rotareneG
citamotuA
rezisehtnyS
V
V
NC or VNO
rezylanA
gnikcarT
murtcepS
rezylanA
COM
Ordering Information
rebmuNtraPegnaRerutarepmeTegakcaP-niP
PPC493SPC°07+otC°0PIDcitsalPnip-02
PWC493SPC°07+otC°0OSediWnip-02
PPE493SPC°58+otC°04PIDcitsalPnip-02
PWE493SPC°58+otC°04OSediWnip-02
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
8
PS8444 01/13/00
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