19-1006; Rev 3; 2/11
Ultra-Low Leakage Monolithic CMOS
Analog Multiplexers
General Description
The MAX328/MA329 are monolithic CMOS analog multi-
plexers. The MAX328 is a single-ended, 1-of-8 device,
and the MAX329 is a differential, 2-of-8 device.
Designed to provide the lowest possible on- and off-
leakages, these multiplexers switch signals from high
source impedance, providing the mux operates into a
high-input-impedance op amp or A/D converter. The
MAX328/MAX329 are pin-for-pin replacements for the
popular DG508/DG509 in these applications.
Adding an external 40kΩ resistor to each input makes
the MAX328/MAX329 an excellent fault-tolerant multi-
plexer. Low leakage (less than 1pA at +25°C) and
2.5kΩ on-resistance allow the circuit to sustain 110V
AC faults indefinitely while maintaining an error of less
than 40nV for normal signals (i.e., 1pA times 40kΩ).
The MAX328/MAX329 work equally well with a single
supply of 10V to 30V or dual supplies of ±5V to ±18V.
They also perform well with unbalanced combinations of
supply voltage, such as +12V and -5V or +5V and -15V.
Low power dissipation (1.9mW with ±15V supplies)
allows use in portable applications.
Features
o
Ultra-Low Off- and On-Leakage: 1pA Typ
o
Bidirectional Operation (Use as Mux or Demux)
o
TTL and CMOS Logic Compatibility
o
Analog-Signal Range Includes Power-Supply Rails
o
Switching Speeds Less Than 1.5µs
o
Pin Compatible with DG508/DG509 and
MAX358/MAX359
o
Latchup Proof Construction
MAX328/MAX329
Ordering Information
PART
MAX328CPE+
MAX328CWE+
MAX328CJE
MAX328C/D
MAX328ETE+
MAX328EPE+
MAX328EWE+
MAX328EJE
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 Plastic DIP
16 Wide SO
16 CERDIP
Dice*
16 TQFN-EP**
16 Plastic DIP
16 Wide SO
16 CERDIP***
Applications
Control Systems
Data Logging Systems
Aircraft Heads-Up Displays
Data-Acquisition Systems
Signal Routing
MAX328MJE
-55°C to +125°C
16 CERDIP***
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*Contact
factory for dice specifications.
**EP
= Exposed pad.
***Contact
factory for availability. Substrate may be allowed to
be unconnected or be connected to V+.
Ordering Information continued at end of data sheet.
Typical Operating Circuit
1-OF-8 CHANNEL SEQUENTIAL MUX WITH 120V AC FAULT CAPABILITY
+15V
-15V
Pin Configurations
TOP VIEW
40kΩ
1/2W
ANALOG
INPUT
40kΩ
1/2W
V+
S1
GND
V-
OP
AMP
D
i BIAS < 1pA
OUT
MAX328
ANALOG
INPUT
S8
A0
V+
Q
B
CLK IN
N.C.
BIN
AIN
A1
A2
A0 1
EN 2
V- 3
S1 4
S2 5
S3 6
S4 7
+
16 A1
15 A2
14 GND
A0 1
EN 2
V- 3
S1A 4
S2A 5
S3A 6
S4A 7
DA 8
+
16 A1
15 GND
14 V+
+15V
EN
MAX328
13 V+
12 S5
11 S6
10 S7
9
S8
MAX329
13 S1B
12 S2B
11 S3B
10 S4B
9
DB
DM7493
Q
C
Q
O
Q
A
N.C.
D 8
V
01
V
02
GND
DIP/SO
+15V
DIP/SO
EN IN
(MUX ON/OFF CONTROL)
Pin Configurations continued at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Ultra-Low Leakage Monolithic CMOS
Analog Multiplexers
MAX328/MAX329
ABSOLUTE MAXIMUM RATINGS
Voltage Referenced to V-
V+ ........................................................................................+44V
GND .....................................................................................+25V
Digital Inputs (Note 1), V
S
, V
D
............................-2V to (V+ + 2V)
Current (Any Terminal, Except S or D)................................30mA
Continuous Current, S or D
(pulsed at 1ms, 10% duty cycle max)..............................40mA
Operating Temperature Range
MAX328/329 C _ _................................................0°C to +70°C
MAX328/329 E _ _ .............................................-40°C to +85°C
MAX328/329 M _ _ ..........................................-55°C to +125°C
Note 1:
All leads soldered or welded to PC board.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Power Dissipation (Package) (Note 1)
CERDIP (derate 10mW/°C above +70°C) .....................800mW
PDIP (derate 10.5mW/°C above +70°C) ....................842.1mW
Wide SO (derate 14.3mW/°C above +70°C) ............1142.9mW
TQFN (derate 33.3mW/°C above +70°C) .................2666.7mw
Storage Temperature.........................................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow)
Lead(Pb)-free packages (PDIP, TQFN, Wide SO) ........+260°C
Packages containing lead(Pb) (CERDIP, PDIP, Wide SO)..+240°C
Packages containing lead(Pb) (TQFN) .........................+260°C
ELECTRICAL CHARACTERISTICS
(V+ = 15V, V- = -15V, V
GND
= 0V,
T
A
= +25°C,
unless otherwise noted.) (Note 2)
MAX328M
MAX329M
MIN
SWITCH
Analog Signal Range
Drain-Source
On-Resistance
V
ANALOG
V
D
= 10V,
I
S
= 100µA
V
D
= -10V,
I
S
= 100µA
Seq. each
switch on,
V
AL
= 0.8V,
V
AH
= 2.4V
-15
1.5
1.0
+15
2.5
2.5
-15
1.5
1.0
+15
3.5
k
3.5
V
TYP
MAX
MAX328C/E
MAX329C/E
MIN
TYP
MAX
PARAMETER
SYMBOL
CONDITIONS
UNITS
R
DS(ON)
Greatest Change in
Drain-Source On-
Resistance Between
Channels
Source Off-Leakage
Current (Note 3)
Drain Off-
Leakage
Current
(Note 3)
Drain On-
Leakage
Current
(Note 3)
MAX328
R
DS(ON)
R
DS(ON)
=
R
DS(ON)
Max
- R
DS(ON)
Min
(
)
R
DS(ON)
Ave
V
S
= 10V, V
D
= -10V
V
S
= -10V, V
D
= 10V
V
D
= 10V, V
S
= -10V
V
D
= -10V, V
S
= 10V
V
D
= 10V, V
S
= -10V
V
D
= -10V, V
S
= 10V
V
S
(all) = V
D
= 10V
V
S
(all) = V
D
= -10V
V
S
(all) = V
D
= 10V
V
S
(all) = V
D
= -10V
Seq. each
switch on,
V
AL
= 0.8V,
V
AH
= 2.4V
V
EN
= 0V
2
2
%
I
S(OFF)
0.1
0.3
0.3
1.0
0.3
0.5
3.0
2.0
1.5
1.0
±10
±10
±10
±10
±10
±10
±10
±10
±10
±10
0.1
0.3
0.3
1.0
0.3
0.5
3.0
2.0
1.5
1.0
±10
±10
±10
±10
±10
±10
±10
±10
±10
±10
pA
I
D(OFF)
MAX329
MAX328
I
D(ON)
MAX329
V
EN
= 0V
pA
pA
2
_______________________________________________________________________________________
Ultra-Low Leakage Monolithic CMOS
Analog Multiplexers
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, V- = -15V, V
GND
= 0V,
T
A
= +25°C,
unless otherwise noted.) (Note 2)
MAX328M
MAX329M
MIN
INPUT
Address Input Current,
Input Voltage High
Address Input Current,
Input Voltage Low
DYNAMIC
Switching Time of
Multiplexer
Break-Before-Make
Interval
Enable Turn-On Time
Enable Turn-Off Time
Off-Isolation
Source Off-Capacitance
MAX328
Drain Off-
Capacitance MAX329
Charge Injection
(Note 4)
SUPPLY
Positive Supply Current
Negative Supply Current
Power-Supply Range for
Continuous Operation
(Note 7)
I+
I-
V
OP
V
EN
= 2.4V
V
EN
= 2.4V
V
A
= 0V/5V
V
A
= 0V/5V
±5
4.5
1
200
-100
±18
±5
4.5
1
200
-100
±18
µA
µA
V
t
TRANSITION
Figure 1
t
OPEN
t
ON(EN)
t
OFF(EN)
OIRR
C
S(OFF)
C
D(OFF)
Figure 2
Figure 3
Figure 3
V
EN
= 0V, R
L
= 1k , C
L
= 15pF,
V
S
= 7V
RMS
, f = 500kHz
V
S
= 0V
V
D
= 0V
V
A
= 10V
Q
(INJ)
V
A
= 0V
V
A
= -10V
V
EN
= 0V,
f = 1MHz
V
EN
= 0V,
f = 1MHz
84
1.8
8.0
4.0
1
2
4
5
0.2
1.0
0.7
84
1.8
8.0
4.0
1
2
4
5
pc
1.0
0.2
1.5
1.0
1.5
µs
µs
µs
µs
dB
pF
pF
I
AH
I
AL
V
A
= 2.4V
V
A
= 15V
V
EN
= 2.4V
V
EN
= 0V
All
V
A
= 0V
0.001
0.001
0.001
0.001
±1
±1
±1
±1
0.001
0.001
0.001
0.001
±1
±1
±1
±1
µA
µA
TYP
MAX
MAX328C/E
MAX329C/E
MIN
TYP
MAX
MAX328/MAX329
PARAMETER
SYMBOL
CONDITIONS
UNITS
_______________________________________________________________________________________
3
Ultra-Low Leakage Monolithic CMOS
Analog Multiplexers
MAX328/MAX329
ELECTRICAL CHARACTERISTICS (Overtemperature)
(V+ = 15V, V- = -15V, V
GND
= 0V,
T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Note 2)
MAX328M
MAX329M
MIN
SWITCH
Analog-Signal Range
Drain-Source
On-Resistance
V
ANALOG
V
D
= 10V,
I
S
= 100µA
V
D
= -10V,
I
S
= 100µA
V
S
= 10V, V
D
= -10V
V
S
= -10V, V
D
= 10V
V
D
= 10V, V
S
= -10V
V
D
= -10V, V
S
= 10V
V
D
= 10V, V
S
= -10V
V
D
= -10V, V
S
= 10V
V
S
(all) = V
D
= 10V
V
S
(all) = V
D
= -10V
V
S
(all) = V
D
= 10V
V
S
(all) = V
D
= -10V
V
A
= 2.4V
V
A
= 15V
V
EN
= 2.4V
V
EN
= 0V
All
V
A
= 0V
Seq. each
switch on,
V
AL
= 0.8V,
V
AH
= 2.4V
Seq. each
switch on,
V
AL
= 0.8V,
V
AH
= 2.4V
V
EN
= 0V
-15
2.2
1.5
+15
4
4
±5
±5
±20
V
EN
= 0V
±20
±10
±10
±20
±20
±10
±10
0.01
0.01
0.01
0.01
±1
±1
±1
±1
0.01
0.01
0.01
0.01
-15
1.9
1.2
+15
5
k
5
±5
±5
±20
±20
±10
±10
±20
±20
±10
±10
±1
±1
±1
±1
nA
nA
nA
V
TYP
MAX
MAX328C/E
MAX329C/E
MIN
TYP
MAX
UNITS
PARAMETER
SYMBOL
TEST CONDITIONS
R
DS(ON)
Source Off-Leakage
Current (Note 6)
Drain Off-
Leakage
Current
(Note 6)
Drain On-
Leakage
Current
(Note 6)
INPUT
Address Input Current,
Input Voltage High
Address Input Current,
Input Voltage Low
MAX328
I
S(OFF)
I
D(OFF)
MAX329
MAX328
I
D(ON)
MAX329
I
AH
I
AL
µA
µA
Note 2:
Typical values are for design aid only; not guaranteed or subject to production testing.
Note 3:
All leakage parameters are 100% tested at maximum rated operating temperature, i.e., +70°C, +85°C, +125°C, and guaran-
teed by correlation at +25°C.
Note 4:
Guaranteed by design.
Note 5:
Electrical characteristics, such as On-Resistance, change when power supplies other than ±15V are used. Power-supply
range is a design characteristic, not production tested.
Note 6:
Leakage parameters are 100% tested at maximum rated operating temperature, i.e., +70°C, etc.
4
_______________________________________________________________________________________
Ultra-Low Leakage Monolithic CMOS
Analog Multiplexers
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
R
DS(ON)
vs. ANALOG INPUT
FOR DUAL SUPPLIES
MAX328/MAX329 toc01
MAX328/MAX329
R
DS(ON)
vs. ANALOG INPUT
FOR SINGLE SUPPLY
WITH +15V SUPPLY
4
R
DS(ON)
(kΩ)
MAX328/MAX329 toc02
9
8
7
R
DS(ON)
(kΩ)
6
5
4
3
2
1
0
-15
-10
-5
0
5
10
±15V
SUPPLIES
±5V
SUPPLIES
5
3
2
1
0
15
0
5
10
15
ANALOG INPUT (V)
ANALOG INPUT (V)
I
S(OFF)
vs. TEMPERATURE
MAX328/MAX329 toc03
I
D(ON),
I
D(OFF)
vs. TEMPERATURE
V+ = 15V
V- = 15V
MAX328/MAX329 toc04
10.0
1.0
0.1
0.01
0.001
0.0001
V+ = 15V
V- = 15V
100
10
1.0
0.1
LEAKAGE (nA)
MAX328/
MAX329
LEAKAGE (nA)
MAX328
0.01
0.001
-55 -35 -15
5
25
45
65
85 105 125
-55 -35 -15
5
25
45
65
85 105 125
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
5
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