21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PS394
Precision, Quad, SPDT, 17V Analog Switch
Description
The PS394 is a precision, low-voltage, quad, single-pole/double-
throw (SPDT) analog switch. The four independent switches oper-
ate 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 elec-
trostatic 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.
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
Pin Configuration
IN1
NO1
COM1
NC1
V-
GND
NC2
COM2
NO2
IN2
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Pin Description
Name
IN4
NO4
COM4
NC4
V+
N.C.
NC3
COM3
NO3
IN3
Function
Logic- Levels Inputs
Normally Open Swithces
Common Switch Poles
Normally Closed Switches
Negative Power Supply
Ground
Not Internally Connected
Positive Power Supply
IN1 - IN4
NO1 - NO4
COM1 - COM4
N C1 - N C4
V
GND
N.C.
V+
1
PS8444
01/13/00
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PS394
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_
(1) .......................
(V 2V) to (V+ +2V)
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 (T
A
= +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.
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 specifi-
cation is not implied.
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 sequenc-
ing 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.
+5V
D1
V+
*
COM
*
*
NO or NC
*
V–
D1
+5V
*Internal Protection Diodes
Figure 1. Overvoltage Protection using Blocking Diodes
2
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01/13/00
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PS394
Precision, Quad, SPDT, 17V Analog Switch
Electrical Characteristics Dual Supplies
Parame te r
Switch
Analog Signal Range
V
COM,
V
NO,
V
NC
R
ON
(note 3)
Symbol
(V+ = 5V ± 10%, V = 5V ± 10%, GND = 0V, V
INH
= 2.4V, V
INL
= 0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
Conditions
Te mp.
Range
M in.
(2)
Typ.
(2)
M ax.
(2)
Units
V
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
C, E
C, E
C, E
C, E
C, E
C, E
C, E
C, E
C, E
C, E
0.2
2.5
0.4
5.0
0.04
0.01
0.5
20
V+
35
45
2
4
4
6
0.2
2.5
0.4
5.0
V
On- Resistance
V+ = 4.5V, V = 4.5V,
V
NC
or V
NO
= ±3.5V,
I
COM
= 10mA, V
INH
= 2.4V,
V
INL
= 0.8V
V
NC
or V
NO
= ±3V,
I
COM
= 10mA,
V+ = 5V, V = 5V
V
NC
or V
NO
= +3V, 0V, 3V;
I
COM
= 10mA,
V+ = 5V; V = 5V
V
COM
= ±4.5V, V
NC
or
V
NO
= ±4.5V, V+ = 5.5V,
V = 5.5V
V
COM
= ±4.5V,
V
NC
or V
NO
= ±4.5V,
V+ = 5.5V, V = 5.5V
On- Resistance Match
Between Channels
(4)
On- Resistance
Flatness
(4)
NC or NO Off
Leakage Current
(5)
COM Leakage
Current
(5)
Digital Logic Input
Input Current with
Input Voltage High
Input Current with
Input Voltage Low
Logic High Input
Voltage
Logic Low Input
Voltage
∆R
ON
Ohm
R
FLAT(ON)
I
NC(OFF)
or
I
NO(OFF)
I
COM(ON)
nA
I
INH
I
INL
V
A_H
V
A_L
V
IN
= 2.4V, all others = 0.8V
V
IN
= 0.8V, all others = 2.4V
T
A
= T
MIN
to T
MAX
T
A
= T
MIN
to T
MAX
1.0
1.0
2.4
0.005
0.005
1.0
µA
1.0
V
0.8
3
PS8444
01/13/00
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PS394
Precision, Quad, SPDT, 17V Analog Switch
Electrical Characteristics Dual Supplies (continued)
Parame te r
Dynamic
Turn- On- Time
t
ON
V
COM
= 3V, Figure 2
Symbol
Conditions
(V+ = 5V ± 10%, V = 5V ± 10%, GND = 0V, V
INH
= 2.4V, V
INL
= 0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
Te mp.
Range
M in.
(2)
Typ.
(2)
M ax.
(2)
Units
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
2
82
130
175
Turn- off- Time
Break- Before- Make
Time Delay
(3)
Charge Injection
(3)
Off Isolation
(6)
Crosstalk
(7)
t
OFF
t
D
V
CTE
V
ISO
V
CT
C
O FF
C
COM(OFF)
C
COM(ON)
V
COM
= 3V, Figure 2
Figure 5
C
L
= 1.0nF, V
GEN
= 0V,
R
GEN
= 0 Ohm, Figure 6
R
L
= 50 Ohm, C
L
= 5pF,
f = 1 MHz, Figure 3
R
L
= 50 Ohm, C
L
= 5pF,
f = 1 MHz, Figure 8
f = 1 MHz, Figure 3
f = 1 MHz, Figure 3
f = 1 MHz, Figure 4
57
75
100
ns
10
5
66
dBm
88
12
12
39
pF
10
pC
Off Capacitance
COM Off Capacitance
Channel On
Capacitance
Supply
Power- Supply Range
Positive Supply
Current
Negative Supply
Current
±2.4
I+
I
All channels on or off, V+ = 5.5V, V = 5.5V, V
IN
= 0V or V+
All channels on or off, V+ = 5.5V, V = 5.5V, V
IN
= 0V or V+
1.0
1.0
0.06
0.01
±8
1.0
V
µA
1.0
4
PS8444
01/13/00
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PS394
Precision, Quad, SPDT, 17V Analog Switch
Electrical Characteristics Single +5V Supply
Parame te r
Switch
Analog Signal Range
V
C O M ,
V
N O ,
V
N C
R
O N
(note 3)
Symbol
(V+ = 5V ± 10%, V = 0V, GND = 0V, V
INH
= 2.4V, V
INL
= 0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
Conditions
Te mp.
Range
M in.
(2)
Typ.
(2)
M ax.
(2)
Units
0V
T
A
= +25°C
T
A
= T
M IN
to T
M AX
T
A
= +25°C
T
A
= T
M IN
to T
M AX
T
A
= +25°C
T
A
= T
M IN
to T
M AX
T
A
= +25°C
T
A
= T
M IN
to T
M AX
T
A
= +25°C
T
A
= T
M IN
to T
M AX
C, E
C, E
C, E
C, E
C, E
C, E
C, E
C, E
C, E
C, E
25
V+
65
V
O n- Resistance
V+ = 5.0V, V = 0V,
V
N C
or V
N O
= 3.5V,
I
C O M
= 1.0mA, V
IN H
= 2.4V,
V
IN L
= 0.8V
V
N C
or V
N O
= 3V,
I
C O M
= 1.0mA,
V+ = 5V
V
N C
or V
N O
= 3V, 2V, 1V
I
C O M
= 1.0mA;
V+ = 5V, V = 0V
V
C O M
= 0V,
V
N C
or V
N O
= 4.5V,
V+ = 5.5V, V = 0V
V
C O M
= 4.5V,
V
N C
or V
N O
= 4.5V,
V+ = 5.5V, V = 0V
75
0.5
2
4
6
8
0.2
2.5
0.4
5.0
0.04
O hm
O n- Resistance Match
Between Channels
(4)
O n- Resistance
Flatness
(4)
NC or NO O ff
Leakage Current
(8)
CO M Leakage
Current
(8)
D igital Logic Input
Input Current with
Input Voltage High
Input Current with
Input Voltage Low
D ynamic
Turn- O n- Time
(3)
∆R
O N
R
F LAT(O N )
I
N C (O F F )
or
I
N O (O F F )
I
C O M (O N )
0.01
0.2
2.5
0.4
5.0
nA
I
IN H
I
IN L
V
IN
= 2.4V, all others = 0.8V
V
IN
= 0.8V, all others = 2.4V
1.0
1.0
0.005
0.005
1.0
µA
1.0
t
O N
V
C O M
= 3V, Figure 2
T
A
= +25°C
T
A
= T
M IN
to T
M AX
T
A
= +25°C
T
A
= T
M IN
to T
M AX
T
A
= +25°C
5
160
250
300
Turn- off- Time
(3)
Break- Before- Make
Time Delay
(3)
Charge Injection
(3)
Supply
Power- Supply Range
Positive Supply
Current
Negative Supply
Current
t
O F F
t
D
V
C TE
V
C O M
= 3V, Figure 2
60
125
175
ns
20
3
5
pC
C
L
= 1.0nF, V
GEN
= 0V,
R
GEN
= 0 O hm
T
A
= +25°C
V+
I+
I
All channels on or off, V
IN
= 0V or V+, V+ = 5.5V, V = 0V
All channels on or off, V
IN
= 0V or V+, V+ = 5.5V, V = 0V
2.4
1.0
1.0
0.01
0.01
16
1.0
V
µA
1.0
5
PS8444
01/13/00
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