PS398/PS399
Precision 8-Ch, Diff. 4-Ch,
17V Analog Multiplexers
Features
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Description
The PS398/PS399 are improved high precision analog multiplex-
ers. The PS398, an 8-channel single-ended mux, selects one of
eight inputs to a common output as determined by a 3-bit address
A0-A2. An EN (enable) pin when low disables all switches, use-
ful when stacking several devices. The PS399 is a 4-channel dif-
ferential multiplexer. It selects one of four differential inputs to a
common differential output as determined by a 2-bit address A0,
A1. An EN pin may be driven low to disable all switches.
These multiplexers operate with dual supplies from +3V to +8V.
Single-supply operation is possible from +3V to +15V. With
+5V power supplies, the PS398/PS399 guarantee <100-ohm on-
resistance. On-Resistance matching between channels is within
6-ohm. On-Resistance flatness is less than 11-ohm over the speci-
fied signal range.
Each switch conducts current equally well in either direction
when on. In the off state each switch blocks voltages up to the
powersupply rails.
Both devices guarantee low leakage currents (<2.5nA at +85oC)
and fast switching speeds (t
TRANS
<250ns). Break-before-make
switching action protects against momentary crosstalk between
channels.
Low On-Resistance (60-ohm typ.) Minimizes Distortion and
Error Voltages
Low Glitching Reduces Step Errors and Improves Settling
Times. Charge Injection: <5pC
Split-Supply Operation (+3V to +8V)
Improved Second Sources for MAX398/MAX399
On-Resistance Matching Between Channels: <6Ohm
On-Resistance Flatness: <11-ohm
Low Off-Channel Leakage,
I
NO(OFF)
< 1nA @ +85oC, I
COM(ON)
, <2.5nA @ +85oC
TTL/CMOS Logic Compatible
Fast Switching Speed, t
TRANS
<250ns
Break-Before-Make action eliminates momentary crosstalk
Rail-to-Rail Analog Signal Range
Low Power Consumption, <300μW
Packaging (Pb-free & Green):
à
16-pin SOIC (W)
Applications
Î
Î
Î
Î
Î
Î
Data Acquisition Systems
Audio Switching and Routing
Test Equipment
PBX, PABX
Telecommunication Systems
Battery-Powered Systems
Block Diagrams and Pin Configurations
PS398
A0
EN
V-
NO1
NO2
NO3
NO4
COM
1
2
3
4
5
6
7
8
Decoders/Drivers
PS399
16
15
14
13
12
11
10
9
A1
A2
GND
V+
NO5
NO6
NO7
NO8
AO
EN
V-
NO1A
NO2A
NO3A
NO4A
COMA
1
2
3
4
5
6
7
8
Decoders/Drivers
16
15
14
13
12
11
10
9
A1
GND
V+
NO1B
NO2B
NO3B
NO4B
COMB
All trademarks are property of their respective owners.
11-0001
1
www.pericom.com
03/02/11
Precision 8-Ch, Diff. 4-Ch,
17V Analog Multiplexers
Truth Tables
PS398
A2
X
0
0
0
0
1
1
1
1
PS398/PS399
PS399
EN
0
1
1
1
1
1
1
1
1
A1
X
0
0
1
1
0
0
1
1
A0
X
0
1
0
1
0
1
0
1
On Switch
None
1
2
3
4
5
6
7
8
A1
X
0
0
1
1
Logic “0”, V
AL
≤ 0.8V
Logic “1”, V
AH
≥ 2.4V
A0
X
0
1
0
1
EN
0
1
1
1
1
On Switch
None
1
2
3
4
Absolute Maximum Ratings
Parameter
Voltages Referenced to V-
V+
GND
GND
V
IN
, V
COM
, V
NO
(1)
Current (any terminal)
Peak Current, COM, NO, NC (pulsed at 1ms, 10% duty cycle)
ESD per Method 3015.7
Continuous Power Dissipation
SOIC (derate 8.7mW/ °C above +70°C)
Storage Temperature
Lead Temperature (soldering, 10s)
Stress beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
Note:
1. Signals on NO, COM, or logic inputs exceeding V+ or V- are clamped by internal diodes. Limit forward diode current to 30mA.
Min.
-0.3
-0.3
-0.3
(V-)-2
Max.
17
17
( V+) + 0.3V
(V+) +2V
30
100
>2000
650
Units
V
mA
V
mW
°C
-65
150
300
All trademarks are property of their respective owners.
11-0001
2
www.pericom.com
03/02/11
Precision 8-Ch, Diff. 4-Ch,
17V Analog Multiplexers
Dynamic
Transition Time
Break-Before-Make Time
Delay
Enable Turn-On Time
Enable Turn-Off Time
Charge Injection
(3)
Off Isolation
(7)
Crosstalk
Logic Input Capacitance
NO Off Capacitance
COM Off Capacitance
t
RANS
t
OPEN
t
ON(EN)
t
OFF(EN)
Q
OIRR
X
TALK
C
IN
C
(OFF)
C
COM(OFF)
Figure 1
Figure 3
Figure 2
Figure 2
C
L
= 1nF, V
S
= 0V, R
S
=
0Ohm,
V
EN
= 0V, R
L
= 1kOhm, f
= 100kHz
R
L
= 1kOhm, f =
100kHz, Figure 6
f =1MHz
f =1MHz, V
EN
= V
NO
= 0V
f =1MHz,
V
EN
= V
COM
=0V
f =1MHz,
V
COM
= 0V
PS398
PS399
PS398
PS399
±3
I+
I-
I
GND
V
EN
= V
A
= 0V or V+,
V+ =5.5V, V- = -5.5V
Full
-1
-1
-1
25
25
Full
25
Full
2.8
-101
dB
-92
2.5
3.6
31
14
35
20
±8
1
1
1
μA
V
pF
55
0
40
72
150
250
150
200
5
pC
ns
150
PS398/PS399
COM Off Capacitance
Supply
Power-Supply Range
Positive-Supply Current
Negative-Supply Current
Ground Current
C
COM(ON)
Notes:
1. 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. ΔR
ON
= R
ON max
- R
ON min
.
5. Flatness is defined as the difference between the maximum and minimum values 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
. See Figure 5.
All trademarks are property of their respective owners.
11-0001
4
www.pericom.com
03/02/11
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
