MAX4598CPP [MAXIM]
Single-Ended Multiplexer, 1 Func, 8 Channel, CMOS, PDIP20, 0.300 INCH, PLASTIC, MS-001AE, DIP-20;
| 型号： | MAX4598CPP |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Single-Ended Multiplexer, 1 Func, 8 Channel, CMOS, PDIP20, 0.300 INCH, PLASTIC, MS-001AE, DIP-20 光电二极管 |
| 文件： | 总12页 (文件大小：145K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1385; Rev 0; 10/98
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MAX4598
Ge n e ra l De s c rip t io n
Fe a t u re s
The MAX4598 low-voltage, CMOS analog IC is a con-
figurable single-ended 8-to-1/differential 4-to-1 multi-
plexer. In addition to the input channels, both V+ and
GND can be switched to the output channels, enabling
the supply voltages to be monitored. The MAX4598
operates from a single +2.7V to +12V supply or from
dual ±6V supplies. The device has low on-resistance
(75Ω max) and TTL-compatible logic inputs from either
±5V or a single +5V supply. Each switch can handle
Rail-to-Rail® analog signals. The MAX4598 has two
modes of operation: as a standard multiplexer and as a
“latchable” multiplexer where the address lines are
♦ V+ and GND Can Be Switched to the Output
Channels
♦ 75Ω (max) On-Resistance
♦ Single-Ended or Differential Operation
♦ 2pC (typ) Charge Injection
♦ Latched or Unlatched Operation
♦ TTL-Compatible Logic Inputs at ±5V Supply
♦ Handles Rail-to-Rail Analog Signals
strobed. The off-leakage current is only 0.1nA at T
=
A
+25°C and 2nA at T = +85°C. ESD protection is > 2kV
per Method 3015.7.
A
Ord e rin g In fo rm a t io n
The MAX4598 is available in small 20-pin SSOP, SO,
and DIP packages.
PART
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
PIN-PACKAGE
20 SSOP
MAX4598CAP
MAX4598CWP
MAX4598CCP
MAX4598C/D
MAX4598EAP
MAX4598EWP
MAX4598EPP
20 Wide SO
20 Plastic DIP
Dice*
Ap p lic a t io n s
ADC Systems
Battery-Operated Equipment
Test Equipment
Avionics
20 SSOP
20 Wide SO
20 Plastic DIP
*Contact factory for dice specifications.
Audio-Signal Routing
Networking
P in Co n fig u ra t io n /Fu n c t io n a l Dia g ra m
1
20
COMB
GND
2
19
A2
A1
3
18
A3
LOGIC DECODER
AO
4
5
6
17
NO4
NO2
NO3
NO8
16
NO6
15
NO7
7
8
9
14
NO1
V-
NO5
13
EN
MAX4598
12
V+
LATCH
10
11
COMA
NLATCH
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
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ABSOLUTE MAXIMUM RATINGS
V+ to GND..............................................................-0.3V to +13V
V- to GND ...............................................................-13V to +0.3V
V+ to V-...................................................................-0.3V to +13V
A_, EN, LATCH, NLATCH, NO_, COM_
(Note 1)...............................................(V- - 0.3V) to (V+ + 0.3V)
Continuous Current (any terminal)....................................±20mA
Peak Current, NO_, or COM_
Continuous Power Dissipation (T = +70°C)
A
SSOP (derate 8mW/°C above +70°C) .........................640mW
Wide SO (derate 10mW/°C above +70°C)...................800mW
Plastic DIP (derate 10.53mW/°C above +70°C) ..........889mW
Operating Temperature Ranges
MAX4598C_P ......................................................0°C to +70°C
MAX4598E_P ...................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
(pulsed at 1ms, 10% duty cycle max)............................±40mA
MAX4598
Note 1: Signals on NO_, COM_, EN, LATCH, NLATCH, or A_ exceeding V+ or V- are clamped by internal diodes. Limit forward cur-
rent to maximum current ratings
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—Dual Supplies
(V+ = +5V ±10%, V- = -5V ±10%, V = 2.4V, V = 0.8V, T = T
to T
, unless otherwise noted. Typical values are at
MAX
IH
IL
A
MIN
T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNIT
V
SWITCH
V
COM_
,
Analog Signal Range
(Note 3)
V-
V+
V
NO_
I
V
= 1mA,
= ±3.0V,
T
= +25°C
45
1
75
100
4
COM_
A
On-Resistance
R
Ω
ON
NO_
T
A
= T
to T
V+ = 4.5V, V- = -4.5V
MIN
MAX
MAX
MAX
MAX
MAX
MAX
I
= 1mA,
= ±3.0V,
T
A
= +25°C
COM_
On-Resistance Matching
Between Channels (Note 4)
∆R
V
Ω
ON
NO_
T
A
= T
to T
6
V+ = 4.5V, V- = -4.5V
MIN
I
= 1mA;
= -3V, 0, 3V;
T
A
= +25°C
7
10
13
0.1
2
COM_
On-Resistance Flatness
(Note 5)
R
V
Ω
FLAT
NO_
T
A
= T
to T
V+ = 4.5V, V- = -4.5V
MIN
±
V
V
_ = ±4.5V,
T
A
= +25°C
-0.1
-2
0.01
0.01
0.01
NO
NO Off-Leakage Current
(Note 6)
I
= ±4.5V,
nA
nA
nA
NO(OFF)
COM_
T
A
= T
to T
V+ = 5.5V, V- = -5.5V
MIN
V
V
= ±4.5V,
±
T
A
= +25°C
-0.2
-10
-0.2
-10
0.2
10
0.2
10
COM_
COM Off-Leakage Current
(Note 6)
I
= ±4.5V,
COM(OFF)
NO_
T
A
= T
to T
V+ = 5.5V, V- = -5.5V
MIN
V
V
NO_
= ±4.5V,
COM_
= ±4.5V,
T
A
= +25°C
COM On-Leakage Current
(Note 6)
I
COM(ON)
T
A
= T
to T
V+ = 5.5V, V- = -5.5V
MIN
LOGIC INPUTS
Input High Voltage
Input Low Voltage
V
2.4
1.7
1.4
V
V
IH
V
IL
0.8
0.1
Input Current with Input
Voltage High
I
IH
V
= V = V
= V
= V = V+
CAL
-0.1
-0.1
0.01
0.01
µA
µA
EN
A_
LATCH
NLATCH
Input Current with Input
Voltage Low
I
IL
V
EN
= V = V
= V
= V = 0
CAL
0.1
A_
LATCH
NLATCH
2
_______________________________________________________________________________________
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MAX4598
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
(V+ = +5V ±10%, V- = -5V ±10%, V = 2.4V, V = 0.8V, T = T
to T , unless otherwise noted. Typical values are at
MAX
IH
IL
A
MIN
T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY
Power-Supply Range
±2.7
-1
±6
1
V
V
= V
= V = V
A_
T
= +25°C
0.001
0.001
0.001
EN
LATCH
A
Positive Supply Current
Negative Supply Current
GND Supply Current
I+
I-
= 0 or V+,
µA
NLATCH
T
A
= T
to T
-5
-1
-5
-1
-5
5
1
5
1
5
V+ = 5.5V, V- = -5.5V
MIN
MAX
MAX
MAX
V
= V = V
T
A
= +25°C
EN
A_
LATCH
= V
= 0 or V+,
µA
µA
NLATCH
T
A
= T
to T
V+ = 5.5V, V- = -5.5V
MIN
V
= V = V
T
A
= +25°C
EN
A_
LATCH
I
= V
= 0 or V+,
GND
NLATCH
T
A
= T
to T
V+ = 5.5V, V- = -5.5V
MIN
DYNAMIC
T
= +25°C
65
100
150
A
Transition Time
t
Figure 1
Figure 2
Figure 3
Figure 3
ns
ns
TRANS
T
A
= T to T
MIN MAX
Break-Before-Make Interval
(Note 3)
t
T
A
= +25°C
= +25°C
4
10
55
OPEN
T
A
90
120
70
Enable Turn-On Time
Enable Turn-Off Time
Charge Injection (Note 3)
Off-Isolation (Note 7)
t
ns
ON
T
A
= T
to T
MIN
MAX
MAX
T
A
= +25°C
40
t
ns
OFF
T
A
= T
to T
100
MIN
C
= 1nF, V
= 0,
L
NO_
V
CTE
T
A
= +25°C
= +25°C
2
5
pC
dB
Figure 4
V
EN
= 0, f = 1MHz,
V
ISO
T
A
-90
Figure 5
V
= 2.4V, f = 1MHz,
= 1Vp-p,
EN
Crosstalk Between Channels
(Note 8)
V
CT
V
T
A
= +25°C
= +25°C
= +25°C
-80
3
dB
pF
pF
GEN
Figure 5
Logic Input Capacitance
NO Off-Capacitance
C
f = 1MHz
f = 1MHz,
T
A
IN
C
V
EN
= V
= 0,
= 0,
T
A
3
OFF
COM_
Figure 6
f = 1MHz,
COM Off-Capacitance
C
C
V
EN
= V
T
A
= +25°C
= +25°C
15
26
pF
pF
COM(OFF)
COM_
Figure 6
f = 1MHz, V = 2.4V,
EN
COM On-Capacitance
LATCH TIMING (Note 3)
Setup Time
T
A
COM(ON)
V
COM_
= 0
T
= +25°C
30
0
70
80
A
t
Figure 7
Figure 7
ns
ns
S
T
A
= T
to T
MIN
MAX
MAX
T
A
= +25°C
-10
-10
Hold Time
t
H
T
A
= T
to T
MIN
_______________________________________________________________________________________
3
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ELECTRICAL CHARACTERISTICS—Single +5V Supply
(V+ = +5V ±10%, V- = 0, V = 2.4V, V = 0.8V, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
IH
IL
A
MIN
(Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNIT
V
SWITCH
V
NO_
,
Analog Signal Range
(Note 3)
0
V+
V
COM_
I
V
= 1mA,
= 3.0V,
NO_
T
= +25°C
80
2
150
200
8
COM_
MAX4598
A
On-Resistance
R
Ω
ON
T
A
= T
to T
V+ = 4.5V
MIN
MAX
MAX
I
= 1mA,
T
A
= +25°C
COM_
On-Resistance Matching
Between Channels (Notes 3, 4)
∆R
V
= 3.0V,
Ω
ON
NO_
T
A
= T
to T
12
V+ = 4.5V
MIN
I
= 1mA;
COM_
On-Resistance Flatness
R
V
= 3V, 2V, 1V;
T
A
= +25°C
= +25°C
8
Ω
FLAT
NO_
V+ = 4.5V
V
= 4.5V, 1V;
= 1V, 4.5V;
T
A
-0.1
-2
0.1
2
NO_
NO Off-Leakage Current
(Notes 6, 9)
I
V
COM_
nA
nA
nA
NO(OFF)
T
A
= T
to T
V+ = 5.5V
MIN
MAX
MAX
MAX
V
COM_
= 4.5V, 1V;
= 1V,4.5V;
T
A
= +25°C
-0.2
-10
-0.2
-10
0.2
10
0.2
10
COM Off-Leakage Current
(Notes 6, 9)
I
V
COM(OFF)
NO_
T
A
= T
to T
V+ = 5.5V
MIN
V
COM_
= 4.5V,
= 4.5V,
T
A
= +25°C
COM On-Leakage Current
(Notes 6, 9)
I
V
COM(ON)
NO_
T
A
= T
to T
V+ = 5.5V
MIN
LOGIC INPUTS (Note 3)
Input High Voltage
V
2.4
1.6
1.3
V
V
IH
Input Low Voltage
V
IL
0.8
0.1
Input Current with Input Voltage
High
V
= V
= V = V
= V+
= 0
-0.1
-0.1
0.01
0.01
µA
µA
EN
LATCH
A_
NLATCH
Input Current with Input Voltage
Low
V
EN
= V
= V = V
0.1
LATCH
A_
NLATCH
SUPPLY
Power-Supply Range
2.7
-1
12.0
1
V
V
EN
= V = V
A_ LATCH
T
A
= +25°C
Positive Supply Current (Note 3)
I+
= V
V+ = 5.5V
= 0 or V+,
µA
NLATCH
T
A
= T
to T
-5
5
MIN
MAX
DYNAMIC (Note 3)
Transition Time
T
= +25°C
115
160
210
A
V
= 3V,
NO_
t
ns
ns
ns
TRANS
Figure 1
T
A
= T
to T
MIN
MAX
Break-Before-Make Interval
Enable Turn-On Time
t
Figure 2
T
A
= +25°C
= +25°C
4
10
85
OPEN
T
A
140
170
100
120
t
Figure 3
Figure 3
ON
T
A
= T
to T
MIN
MAX
MAX
T
A
= +25°C
60
Enable Turn-Off Time
t
ns
OFF
T
A
= T
to T
MIN
4
_______________________________________________________________________________________
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MAX4598
ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)
(V+ = +5V ±10%, V- = 0, V = 2.4V, V = 0.8V, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
IH
IL
A
MIN
(Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNIT
C
= 1nF, V
= 0,
L
NO_
Charge Injection
LATCH TIMING (Note 3)
Setup Time
V
T
= +25°C
1
5
pC
CTE
A
Figure 4
T
A
= +25°C
30
0
70
80
t
Figure 7
Figure 7
ns
ns
S
T
A
= T
to T
MIN
MAX
MAX
T
A
= +25°C
-10
-10
Hold Time
t
H
T
A
= T
to T
MIN
ELECTRICAL CHARACTERISTICS—Single +3V Supply
(V+ = +2.7V to +3.6V, V- = 0, V = 2.4V, V = 0.6V, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
IH
IL
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNIT
V
SWITCH
Analog Signal Range
(Note 3)
0
V+
I
V
= 0.2mA,
= 1.5V,
NO_
T
A
= +25°C
220
500
COM_
On-Resistance
R
Ω
ON
T
A
= T
to T
MAX
600
0.6
V+ = 2.7V
MIN
LOGIC INPUTS (Note 3)
Input High Voltage
Input Low Voltage
DYNAMIC (Note 3)
I
2.4
1.1
1.0
V
V
IH
I
IL
V
V
NO8
= 1.5V,
= 0, Figure 1
NO1
Transition Time
t
T
= +25°C
= +25°C
= +25°C
200
160
120
310
250
180
ns
ns
ns
TRANS
A
V
= 1.5V,
NO1
Enable Turn-On Time
Enable Turn-Off Time
t
T
A
ON
Figure 3
V
= 1.5V,
NO1
t
T
A
OFF
Figure 3
LATCH TIMING (Note 3)
Setup Time
t
Figure 7
Figure 7
T
= +25°C
= +25°C
A
45
0
80
ns
ns
S
A
Hold Time
t
T
-10
H
Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in
this data sheet.
Note 3: Guaranteed by design.
Note 4: ∆R
= R
- R
.
ON
ON(MAX)
ON(MIN)
Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal range.
Note 6: Leakage parameters are 100% tested at maximum-rated hot temperature and guaranteed by correlation at +25°C.
Note 7: Off-Isolation = 20log (V
/ V ), V
= output, V = input to off switch.
COM NO
10 COM
NO
Note 8: Between any two switches.
Note 9: Leakage testing at single supply is guaranteed by testing with dual supplies.
_______________________________________________________________________________________
5
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8 -t o -1 /Diffe re n t ia l 4 -t o -1 Mu lt ip le x e r
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(T = +25°C, unless otherwise noted.)
A
ON-RESISTANCE vs. V
AND
ON-RESISTANCE vs. V
AND
ON-RESISTANCE vs. V
COM
COM
COM
TEMPERATURE (DUAL SUPPLIES)
TEMPERATURE (SINGLE SUPPLY)
(SINGLE SUPPLY)
60
50
40
30
20
10
0
90
80
70
60
50
40
30
20
10
0
190
170
T = +85°C
T = +70°C
A
A
MAX4598
150
130
110
90
V+ = +2.7V
V+ = +3V
T = +85°C
A
T = +70°C
A
T = +25°C
A
T = +25°C
A
T = -40°C
A
T = -40°C
A
V+ = +5V
70
V+ = +5V
V- = 0
V+ = +5V
V- = -5V
50
30
-5 -4 -3 -2 -1
0
1
2
3
4
5
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
(V)
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
(V)
V
(V)
V
V
COM
COM
COM
ON-RESISTANCE vs. V
LEAKAGE CURRENT
vs. TEMPERATURE
COM
(DUAL SUPPLIES)
SUPPLY CURRENT vs. TEMPERATURE
100n
110
100
1000n
100n
10n
1n
V+ = +5V
V- = -5V
10n
1n
90
80
70
60
50
40
30
I+
I-
V+ = +2.7V
V- = -2.7V
COM (ON)
COM (OFF)
100p
10p
100p
10p
1p
V+ = +3V
V- = -3V
1p
100f
10f
V+ = +5V
V- = -5V
NO (OFF)
100f
10f
1f
-5 -4 -3 -2 -1
0
1
2
3
4
5
-40 -20
0
20 40 60 80 100 120
TEMPERATURE (°C)
-40 -20
0
20 40 60 80 100 120 140
TEMPERATURE (°C)
V
(V)
COM
TURN-ON/TURN-OFF TIMES
vs. SUPPLY VOLTAGE (DUAL SUPPLIES)
TURN-ON/TURN-OFF TIMES
vs. TEMPERATURE
140
120
100
80
80
V+ = +5V
V- = -5V
70
60
50
40
30
20
t
ON
t
ON
60
t
OFF
t
OFF
40
20
0
2
3
4
5
-40
0
25
TEMPERATURE (°C)
70
85
V+, V- (V)
6
_______________________________________________________________________________________
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8 -t o -1 /Diffe re n t ia l 4 -t o -1 Mu lt ip le x e r
MAX4598
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(T = +25°C, unless otherwise noted.)
A
FREQUENCY RESPONSE
CHARGE INJECTION vs. V
COM
MAX4598-09
180
140
100
60
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
6
5
4
INSERTION LOSS
V+ = +5V
V- = -5V
OFF-ISOLATION
3
2
20
-20
-60
-100
-140
-180
1
ON-PHASE
V+ = +5V
V- = 0
0
-1
-2
0.1
1
10
100
1000
-5 -4 -3 -2 -1
0
1
2
3
4
5
FREQUENCY (MHz)
V
COM
(V)
_______________De t a ile d De s c rip t io n
P in De s c rip t io n
The MAX4598 can be configured as a single 8-channel
or dual 4-channel multiplexer. In the single 8-to-1 multi-
plexer configuration, COMA connects to one of the
eight inputs (NO1 to NO8), GND, or V+ by the address
inputs A0 to A2 (see Truth Table). In the dual 4-to-1
multiplexer configuration, COMA connects to one of the
four inputs (NO1, NO3, NO5, NO7), GND, or V+, and
COMB connects to one of the four inputs (NO2, NO4,
NO6, NO8) or GND by the address inputs A0 to A2
(see Truth Table).
PIN
NAME
COMB
A1
FUNCTION
1
2
Multiplexer Output B
Address Bit 1
3
A0
Address Bit 0
4
NO4
NO2
NO3
NO1
V-
Channel Input 4
Channel Input 2
Channel Input 3
Channel Input 1
Negative Supply Voltage
Positive Supply Voltage
Multiplexer Output A
Data-Strobe Mode Select
Latch Input
5
6
7
The MAX4598 func tions a s a s ta nd a rd multip le xe r
when NLATCH is high. When NLATCH is low, the con-
dition set by A0 to A3 is activated at the rising edge of
LATCH. Otherwise, the outputs remain at the previously
set condition.
8
9
V+
10
11
12
13
14
15
16
17
18
19
20
COMA
NLATCH
LATCH
EN
__________Ap p lic a t io n s In fo rm a t io n
The MAX4598 construction is typical of most CMOS
analog switches. It has three supply pins: V+, V-, and
GND. The positive and negative power supplies are
used to drive the internal CMOS switches and set the
limits of the analog voltage on any switch. Reverse
ESD-protection diodes are internally connected be-
tween each analog signal pin and V+ and V-. If the volt-
age on any pin exceeds V+ or V- by 0.3V, one of the
ESD diodes starts to conduct. During normal operation
these reverse-biased ESD diodes leak, forming the only
current drawn from V-.
Multiplexer Enable
Channel Input 5
Channel Input 7
Channel Input 6
Channel Input 8
Address Bit 3
NO5
NO7
NO6
NO8
A3
A2
Address Bit 2
GND
Ground
_______________________________________________________________________________________
7
Lo w -Vo lt a g e , Co m b in a t io n S in g le -En d e d
8 -t o -1 /Diffe re n t ia l 4 -t o -1 Mu lt ip le x e r
Tru t h Ta b le
A3
A2
A1
A0
EN
LATCH
NLATCH
COMA
COMB
x
x
x
x
0
x
x
High-Z
High-Z
State is latched on the
rising edge of LATCH
State is latched on the
rising edge of LATCH
x
x
x
x
1
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
NO1
NO2
NO3
NO4
NO5
NO6
NO7
NO8
NO1
NO3
NO5
NO7
GND
V+
GND
GND
GND
GND
GND
GND
GND
GND
NO2
MAX4598
NO4
NO6
NO8
GND
GND
NO8
NO8
High-Z
High-Z
x = Don’t care
Virtually all the analog leakage current is through the
ESD diodes. Although the ESD diodes on a given sig-
nal pin are identical, and therefore fairly well balanced,
they are reverse-biased differently. Each is biased by
either V+ or V- and the analog signal. This means their
leakage varies as the signal varies. The difference in
the two diodes’ leakage from the signal path to the V+
and V- pins constitutes the analog signal-path leakage
current. All analog leakage current flows to the supply
terminals, not to the other switch terminal. This explains
how both sides of a given switch can show leakage
currents of either the same or opposite polarity.
the logic supplies and the analog supplies. All pins
have ESD protection to V+ and to V-.
Increasing V- has no effect on the logic-level thresh-
olds, but it does increase the drive to the P-channel
switches, reducing their on-resistance. V- also sets the
negative limit of the analog signal voltage.
The logic-level thresholds are CMOS- and TTL-compat-
ible when V+ is +5V. As V+ is raised, the threshold
increases slightly; when V+ reaches +12V, the level
threshold is about 3.2V, which is above the TTL output
high-level minimum of 2.4V but still compatible with
CMOS outputs.
The re is no c onne c tion b e twe e n the a na log s ig na l
paths and GND. The analog signal paths consist of an
N-channel and a P-channel MOSFET, with their sources
and drains paralleled and their gates driven out of
phase with V+ and V- by the logic-level translators.
Bip o la r-S u p p ly Op e ra t io n
The MAX4598 operates with bipolar supplies between
±2.7V and ±6V. The V+ and V- supplies need not be
symmetrical, but their sum cannot exceed the absolute
maximum rating of 13V. Do not connect the MAX4598
V+ pin to +3V and connect the logic-level input pins
to TTL logic-level signals. TTL logic-level outputs
can exceed the absolute maximum ratings, causing
damage to the part and/or external circuits.
V+ and GND power the internal logic and logic-level
translators, and set the input logic thresholds. The
log ic -le ve l tra ns la tors c onve rt the log ic le ve ls to
switched V+ and V- signals to drive the analog switch
gates. This drive signal is the only connection between
8
_______________________________________________________________________________________
Lo w -Vo lt a g e , Co m b in a t io n S in g le -En d e d
8 -t o -1 /Diffe re n t ia l 4 -t o -1 Mu lt ip le x e r
MAX4598
Caution: The absolute maximum V+ to V- differential
off-isolation, and distortion are degraded (see Typical
Operating Characteristics).
voltage is 13V. Typical “±6 Volt” or “12 Volt” sup-
plies with ±10% tolerances can be as high as 13.2V
from V+ to V-. This voltage can damage the
MAX4598. Even ±5% tolerance supplies may have
overshoot or noise spikes that exceed 13V.
Single-supply operation also limits signal levels and
interferes with grounded signals. When V- = 0, AC sig-
nals are limited to -0.3V. Voltages below -0.3V can be
clipped by the internal ESD-protection diodes, and the
parts can be damaged if excessive current flows.
S in g le -S u p p ly Op e ra t io n
The MAX4598 operates from a single supply between
+2.7V and +12V when V- is connected to GND. All of
the bipolar precautions must be observed. However,
these parts are optimized for ±5V operation, and most
AC and DC characteristics are degraded significantly
when departing from ±5V. As the overall supply voltage
(V+ to V-) is lowered, switching speed, on-resistance,
P o w e r Off
When power to the MAX4598 is off (i.e., V+ = V- = 0),
the Absolute Maximum Ratings still apply: neither logic-
level inputs on NO_ nor signals on COM_ can exceed
±0.3V. Voltages beyond ±0.3V cause the internal ESD-
protection diodes to conduct, and the parts can be
damaged if excessive current flows.
Te s t Circ u it s /Tim in g Dia g ra m s
+5V
t < 20ns
R
LOGIC
INPUT
V
EN
V+
0V
t < 20ns
F
50%
50%
NLATCH
EN
V+
NO1
V+
+3V
-3V
LATCH
A3
NO2–NO7
V
NO1
90%
SWITCH
OUTPUT
A0
A1
A2
NO8
MAX4598
V
OUT
COMA
V-
0V
V
OUT
GND
90%
35pF
300Ω
50Ω
V
NO8
-5V
t
t
TRANS
TRANS
Figure 1. Transition Time
+5V
NLATCH
V+
t < 20ns
R
EN
V+
0V
t < 20ns
LOGIC
INPUT
V
A
F
50%
50%
LATCH
A3
NO1–NO8
+3V
A0
MAX4598
V
OUT
V
A
90%
A1
A2
COMA
V-
V
OUT
SWITCH
OUTPUT
GND
50Ω
35pF
V
COM
300Ω
t
OPEN
0V
-5V
Figure 2. Break-Before-Make Interval
_______________________________________________________________________________________
9
Lo w -Vo lt a g e , Co m b in a t io n S in g le -En d e d
8 -t o -1 /Diffe re n t ia l 4 -t o -1 Mu lt ip le x e r
Te s t Circ u it s /Tim in g Dia g ra m s (c o n t in u e d )
t < 20ns
R
+5V
V+
V+
0V
t < 20ns
V
EN
F
50%
50%
NLATCH
EN
V
EN
NO1
+3V
LATCH
A3
NO2–NO8
V
OUT
5
A0
MAX4598
90% 90%
A1
COMA
V-
V
OUT
A2 GND
50Ω
1k
35pF
-5V
0V
t
t
ON
OFF
Figure 3. Enable Switching Time
+5V
V+
R
S
V+
0V
NO NLATCH
EN
LOGIC
INPUT
V
EN
ON
OFF
ON
V
EN
V
S
MAX4598
A0
A1
COMA
V
COM
CHANNEL
SELECT
∆V
OUT
A2
A3
V
COM
C
L
1nF
∆V IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
ERROR Q WHEN THE CHANNEL TURNS OFF.
OUT
GND
V-
-5V
Q = (∆V ) (C )
OUT
L
Figure 4. Charge Injection
+5V
V-
10nF
NETWORK
ANALYZER
V
V
IN
OUT
OFF-ISOLATION = 20log
CROSSTALK = 20log
V
IN
50Ω
50Ω
V+
EN
NLATCH
NO_
V
OUT
V
IN
V
OUT
MAX4598
V+
MEAS.
REF
COM_
GND
A_
LATCH V-
50Ω
50Ω
10nF
-5V
NOTES: MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM AND “OFF” TERMINAL ON EACH SWITCH.
ON LOSS IS MEASURED BETWEEN COM AND “ON” TERMINAL ON EACH SWITCH.
Figure 5. Off-Isolation/Crosstalk
10 ______________________________________________________________________________________
Lo w -Vo lt a g e , Co m b in a t io n S in g le -En d e d
8 -t o -1 /Diffe re n t ia l 4 -t o -1 Mu lt ip le x e r
MAX4598
Te s t Circ u it s /Tim in g Dia g ra m s
____________________Ch ip To p o g ra p h y
(c o n t in u e d )
A1
A3
A0
GND A2
COMB
+5V
V+
NLATCH
A3
A2
A1
A0
NO1
NO8
NO8
1MHz
CAPACITANCE
ANALYZER
NO4
CHANNEL
SELECT
MAX4598
0.104"
(2.64mm)
NO6
COM_
NO2
NO3
LATCH,
EN
V-
GND
NO7
NO5
-5V
NO1
Figure 6. NO_/COM_ Capacitance
+5V
V- V+
COMA
LATCH
EN
NLATCH
EN
V+
0.092"
LATCH
(2.34mm)
+3V
NO2
NO1, NO3–NO8
A1
A2
A0
TRANSISTOR COUNT: 287
MAX4598
SUBSTRATE CONNECTED TO V+
A3
COM
NLATCH
GND
V-
-5V
LATCH
50%
t
H
t
S
ADDRESS
V
IH
V
IL
V - V
IH IL
2
NOTE: TIMING MEASUREMENT REFERENCE LEVEL IS
Figure 7. Setup Time, Hold Time
______________________________________________________________________________________ 11
Lo w -Vo lt a g e , Co m b in a t io n S in g le -En d e d
8 -t o -1 /Diffe re n t ia l 4 -t o -1 Mu lt ip le x e r
NOTES
MAX4598
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Ma x im In t e g ra t e d P ro d u c t s , 1 2 0 S a n Ga b rie l Drive , S u n n yva le , CA 9 4 0 8 6 4 0 8 -7 3 7 -7 6 0 0
© 1998 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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