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19-1006; Rev 2; 9/01
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
MAX328EGE
MAX328EPE
MAX328EWE
MAX328EJE
MAX328MJE
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
-55°C to +125°C
PIN-PACKAGE
16 Plastic DIP
16 Wide SO
16 CERDIP
Dice*
16 QFN
16 Plastic DIP
16 Wide SO
16 CERDIP**
16 CERDIP**
Applications
Control Systems
Data Logging Systems
Aircraft Heads-Up Displays
Data-Acquisition Systems
Signal Routing
*Contact
factory for dice specifications.
**Contact
factory for availability. Substrate may be allowed to
float or be connected to V+.
Ordering Information and Pin Configurations continued at
end of data sheet.
Typical Operating Circuit
1-OF-8 CHANNEL SEQUENTIAL MUX WITH 120V AC FAULT CAPABILITY
+15V
-15V
Pin Configurations
16 A1
15 A2
14 GND
TOP VIEW
A0 1
EN 2
V- 3
40kΩ
1/2W
ANALOG
INPUT
40kΩ
1/2W
V+
S1
GND
V-
OP
AMP
D
OUT
S1 4
S2 5
S3 6
S4 7
MAX328
13 V+
12 S5
11 S6
10 S7
9
S8
MAX328
ANALOG
INPUT
S8
A
0
V+
Q
B
CLK IN
N.C.
BIN
AIN
A
1
A
2
+15V
i BIAS < 1pA
EN
D 8
DIP/SO
A0 1
EN 2
V- 3
S1A 4
16 A1
15 GND
14 V+
DM7493
Q
C
Q
O
Q
A
N.C.
MAX329
13 S1B
12 S2B
11 S3B
10 S4B
9
DB
V
01
V
02
GND
S2A 5
S3A 6
+15V
S4A 7
DA 8
EN IN
(MUX ON/OFF CONTROL)
DIP/SO
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas 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
Power Dissipation (Package) (Note 1)
16-Pin CERDIP (Note 2) ...............................................900mW
16-Pin Plastic DIP (Note 3)...........................................470mW
16-Pin Wide SO (Note 4) ..............................................750mW
16-Pin QFN (Note 5) ...................................................1538mw
Storage Temperature.........................................-65°C to +150°C
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
All leads soldered or welded to PC board.
Derate 12mW/°C above +75°C.
Derate 6.3mW/°C above +75°C.
Derate 10mW/°C above +75°C.
Derate 19.2mW/°C above +75°C.
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.
ELECTRICAL CHARACTERISTICS
(V+ = +15V, V- = -15V, GND = 0V, T
A
= +25°C, unless otherwise noted.)
LIMITS
PARAMETER
SYMBOL
TEST CONDITIONS
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
2.5
2.5
±15
1.5
1.0
3.5
kΩ
3.5
V
MAX328M
MAX329M
TYP
MAX
MAX328C/E
MAX329C/E
MIN
TYP
MAX
UNITS
R
DS(ON)
Greatest Change in
Drain-Source On-
Resistance Between
Channels
Source Off-Leakage
Current (Note 6)
MAX328
Drain Off-
Leakage
Current (Note 6) MAX329
MAX328
Drain On-
Leakage
Current (Note 6) MAX329
∆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)
V
EN
= 0V
pA
I
D(ON)
pA
2
_______________________________________________________________________________________
Ultra-Low Leakage Monolithic CMOS
Analog Multiplexers
ELECTRICAL CHARACTERISTICS (continued)
(V+ = +15V, V- = -15V, GND = 0V, T
A
= +25°C, unless otherwise noted.)
LIMITS
PARAMETER
SYMBOL
TEST CONDITIONS
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
Drain Off-
Capacitance
MAX328
MAX329
t
TRANSITION
See Figure 1
t
OPEN
t
ON(EN)
t
OFF(EN)
OIRR
C
S(OFF)
C
D(OFF)
See Figure 2
See Figure 3
See Figure 3
V
EN
= 0V, R
L
= 1kΩ, C
L
= 15pF,
V
S
= 7V
RMS
, f = 500kHz
V
S
= 0V
V
D
= 0V
V
A
= +10V
Charge Injection (Note 8)
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
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
MAX328M
MAX329M
TYP
MAX
MAX328C/E
MAX329C/E
MIN
TYP
MAX
UNITS
MAX328/MAX329
Note 6:
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 7:
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 8:
Guaranteed by design.
Typical values are for DESIGN AID ONLY, not guaranteed or subject to production testing.
_______________________________________________________________________________________
3
Ultra-Low Leakage Monolithic CMOS
Analog Multiplexers
MAX328/MAX329
ELECTRICAL CHARACTERISTICS (Over Temperature)
(V+ = +15V, V- = -15V, GND = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
LIMITS
PARAMETER
SYMBOL
TEST CONDITIONS
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
I
D(OFF)
V
D
= -10V, V
S
= 10V
V
D
= 10V, V
S
= -10V
V
D
= -10V, V
S
= 10V
V
S
(all) = V
D
= 10V
I
D(ON)
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
V
EN
= 0V
Seq. each
switch on,
V
AL
= 0.8V,
V
AH
= 2.4V
V
EN
= 0V
±15
2.2
1.5
4
4
±5
±5
±20
±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
5
kΩ
5
±5
±5
±20
±20
±10
±10
±20
±20
±10
±10
±1
±1
±1
±1
nA
nA
nA
V
MAX328M
MAX329M
TYP
MAX
MAX328C/E
MAX329C/E
MIN
TYP
MAX
UNITS
R
DS(ON)
Source Off-
Leakage Current (Note 9)
Drain Off-
Leakage
Current (Note 9) MAX329
MAX328
I
S(OFF)
MAX328
Drain On-
Leakage
Current (Note 9) MAX329
INPUT
Address Input Current,
Input Voltage High
Address Input Current,
Input Voltage Low
I
AH
I
AL
µA
µA
Note 9:
Leakage parameters are 100% tested at maximum rated operating temperature, i.e., +70°C, etc.
4
_______________________________________________________________________________________
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