Maxim MAX4598EWP Low-voltage, combination single-ended 8-to-1/differential 4-to-1 multiplexer Datasheet

19-1385; Rev 0; 10/98
Low-Voltage, Combination Single-Ended
8-to-1/Differential 4-to-1 Multiplexer
The MAX4598 low-voltage, CMOS analog IC is a configurable single-ended 8-to-1/differential 4-to-1 multiplexer. 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
strobed. The off-leakage current is only 0.1nA at TA =
+25°C and 2nA at TA = +85°C. ESD protection is > 2kV
per Method 3015.7.
The MAX4598 is available in small 20-pin SSOP, SO,
and DIP packages.
Applications
ADC Systems
Battery-Operated Equipment
Test Equipment
Avionics
Audio-Signal Routing
Features
♦ 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
Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
0°C to +70°C
20 SSOP
MAX4598CAP
MAX4598CWP
0°C to +70°C
MAX4598CCP
0°C to +70°C
MAX4598C/D
0°C to +70°C
MAX4598EAP
-40°C to +85°C
MAX4598EWP
-40°C to +85°C
MAX4598EPP
-40°C to +85°C
*Contact factory for dice specifications.
20 Wide SO
20 Plastic DIP
Dice*
20 SSOP
20 Wide SO
20 Plastic DIP
Networking
Pin Configuration/Functional Diagram
COMB
A1
AO
NO4
NO2
NO3
NO1
VV+
COMA
1
20
2
19
3
LOGIC DECODER
18
4
17
5
16
6
15
7
14
8
13
9
MAX4598
10
12
11
GND
A2
A3
NO8
NO6
NO7
NO5
EN
LATCH
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.
MAX4598
General Description
MAX4598
Low-Voltage, Combination Single-Ended
8-to-1/Differential 4-to-1 Multiplexer
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_
(pulsed at 1ms, 10% duty cycle max) ............................±40mA
Continuous Power Dissipation (TA = +70°C)
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
Note 1: Signals on NO_, COM_, EN, LATCH, NLATCH, or A_ exceeding V+ or V- are clamped by internal diodes. Limit forward current 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%, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNIT
V+
V
SWITCH
Analog Signal Range
VCOM_,
VNO_
(Note 3)
V-
ICOM_ = 1mA,
VNO_ = ±3.0V,
V+ = 4.5V, V- = -4.5V
TA = +25°C
ICOM_ = 1mA,
VNO_ = ±3.0V,
V+ = 4.5V, V- = -4.5V
TA = +25°C
ICOM_ = 1mA;
VNO_ = -3V, 0, 3V;
V+ = 4.5V, V- = -4.5V
±
VNO_ = ±4.5V,
VCOM_ = ±4.5V,
V+ = 5.5V, V- = -5.5V
TA = +25°C
COM Off-Leakage Current
(Note 6)
VCOM_ = ±4.5V,
±
ICOM(OFF) VNO_ = ±4.5V,
V+ = 5.5V, V- = -5.5V
TA = +25°C
-0.2
TA = TMIN to TMAX
-10
COM On-Leakage Current
(Note 6)
VCOM_ = ±4.5V,
VNO_ = ±4.5V,
V+ = 5.5V, V- = -5.5V
TA = +25°C
-0.2
ICOM(ON)
TA = TMIN to TMAX
-10
On-Resistance
RON
On-Resistance Matching
Between Channels (Note 4)
∆RON
On-Resistance Flatness
(Note 5)
RFLAT
NO Off-Leakage Current
(Note 6)
INO(OFF)
45
TA = TMIN to TMAX
Ω
100
1
TA = TMIN to TMAX
4
Ω
6
7
TA = TMIN to TMAX
TA = +25°C
75
10
Ω
13
-0.1
0.01
0.1
nA
TA = TMIN to TMAX
-2
2
0.01
0.2
nA
10
0.01
0.2
nA
10
LOGIC INPUTS
Input High Voltage
VIH
Input Low Voltage
VIL
Input Current with Input
Voltage High
IIH
VEN = VA_ = VLATCH = VNLATCH = VCAL = V+
Input Current with Input
Voltage Low
IIL
VEN = VA_ = VLATCH = VNLATCH = VCAL = 0
2
2.4
1.7
V
1.4
0.8
V
-0.1
0.01
0.1
µA
-0.1
0.01
0.1
µA
_______________________________________________________________________________________
Low-Voltage, Combination Single-Ended
8-to-1/Differential 4-to-1 Multiplexer
(V+ = +5V ±10%, V- = -5V ±10%, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNIT
±6
V
SUPPLY
Power-Supply Range
Positive Supply Current
Negative Supply Current
GND Supply Current
±2.7
I+
I-
IGND
VEN = VA_ = VLATCH
= VNLATCH = 0 or V+,
V+ = 5.5V, V- = -5.5V
TA = +25°C
-1
TA = TMIN to TMAX
-5
VEN = VA_ = VLATCH
= VNLATCH = 0 or V+,
V+ = 5.5V, V- = -5.5V
TA = +25°C
-1
TA = TMIN to TMAX
-5
VEN = VA_ = VLATCH
= VNLATCH = 0 or V+,
V+ = 5.5V, V- = -5.5V
TA = +25°C
-1
TA = TMIN to TMAX
-5
0.001
1
µA
5
0.001
1
µA
5
0.001
1
µA
5
DYNAMIC
TA = +25°C
65
100
Transition Time
tTRANS
Figure 1
Break-Before-Make Interval
(Note 3)
tOPEN
Figure 2
Enable Turn-On Time
tON
Figure 3
Enable Turn-Off Time
tOFF
Figure 3
Charge Injection (Note 3)
VCTE
CL = 1nF, VNO_ = 0,
Figure 4
TA = +25°C
2
Off-Isolation (Note 7)
VISO
VEN = 0, f = 1MHz,
Figure 5
TA = +25°C
-90
dB
Crosstalk Between Channels
(Note 8)
VCT
VEN = 2.4V, f = 1MHz,
VGEN = 1Vp-p,
TA = +25°C
Figure 5
-80
dB
Logic Input Capacitance
CIN
f = 1MHz
TA = +25°C
3
pF
f = 1MHz,
VEN = VCOM_ = 0,
Figure 6
TA = +25°C
3
pF
COM Off-Capacitance
f = 1MHz,
CCOM(OFF) VEN = VCOM_ = 0,
Figure 6
TA = +25°C
15
pF
COM On-Capacitance
CCOM(ON)
f = 1MHz, VEN = 2.4V,
TA = +25°C
VCOM_ = 0
26
pF
TA = +25°C
30
NO Off-Capacitance
COFF
TA = TMIN to TMAX
TA = +25°C
150
4
TA = +25°C
10
55
TA = TMIN to TMAX
ns
90
120
TA = +25°C
40
TA = TMIN to TMAX
ns
70
100
5
ns
ns
pC
LATCH TIMING (Note 3)
Setup Time
tS
Figure 7
Hold Time
tH
Figure 7
TA = TMIN to TMAX
70
80
TA = +25°C
-10
TA = TMIN to TMAX
-10
0
ns
ns
_______________________________________________________________________________________
3
MAX4598
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
MAX4598
Low-Voltage, Combination Single-Ended
8-to-1/Differential 4-to-1 Multiplexer
ELECTRICAL CHARACTERISTICS—Single +5V Supply
(V+ = +5V ±10%, V- = 0, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
(Note 2)
PARAMETER
SYMBOL
CONDITIONS
CONDITIONS
MIN
TYP
MAX
UNIT
V+
V
SWITCH
Analog Signal Range
On-Resistance
VNO_,
VCOM_
RON
(Note 3)
0
ICOM_ = 1mA,
VNO_ = 3.0V,
V+ = 4.5V
TA = +25°C
ICOM_ = 1mA,
VNO_ = 3.0V,
V+ = 4.5V
TA = +25°C
TA = TMIN to TMAX
On-Resistance Matching
Between Channels (Notes 3, 4)
∆RON
On-Resistance Flatness
RFLAT
ICOM_ = 1mA;
VNO_ = 3V, 2V, 1V;
V+ = 4.5V
NO Off-Leakage Current
(Notes 6, 9)
VNO_ = 4.5V, 1V;
VCOM_ = 1V, 4.5V;
V+ = 5.5V
TA = +25°C
INO(OFF)
COM Off-Leakage Current
(Notes 6, 9)
VCOM_ = 4.5V, 1V;
ICOM(OFF) VNO_ = 1V,4.5V;
V+ = 5.5V
COM On-Leakage Current
(Notes 6, 9)
ICOM(ON)
LOGIC INPUTS (Note 3)
Input High Voltage
VIH
Input Low Voltage
VIL
VCOM_ = 4.5V,
VNO_ = 4.5V,
V+ = 5.5V
2
Ω
8
Ω
12
TA = +25°C
Ω
8
-0.1
0.1
-2
2
TA = +25°C
-0.2
0.2
TA = TMIN to TMAX
-10
10
TA = +25°C
-0.2
0.2
TA = TMIN to TMAX
-10
10
nA
TA = TMIN to TMAX
nA
nA
2.4
VEN = VLATCH = VA_ = VNLATCH = V+
Input Current with Input Voltage
Low
VEN = VLATCH = VA_ = VNLATCH = 0
SUPPLY
Power-Supply Range
I+
150
200
TA = TMIN to TMAX
Input Current with Input Voltage
High
Positive Supply Current (Note 3)
80
1.6
V
1.3
0.8
V
-0.1
0.01
0.1
µA
-0.1
0.01
0.1
µA
2.7
12.0
V
VEN = VA_ = VLATCH
= VNLATCH = 0 or V+,
V+ = 5.5V
TA = +25°C
-1
1
TA = TMIN to TMAX
-5
5
µA
DYNAMIC (Note 3)
Transition Time
tTRANS
VNO_ = 3V,
Figure 1
TA = +25°C
Break-Before-Make Interval
tOPEN
Figure 2
TA = +25°C
Enable Turn-On Time
tON
Figure 3
Enable Turn-Off Time
tOFF
Figure 3
4
115
TA = TMIN to TMAX
TA = +25°C
210
4
10
85
TA = TMIN to TMAX
TA = +25°C
160
ns
140
170
60
TA = TMIN to TMAX
_______________________________________________________________________________________
ns
100
120
ns
ns
Low-Voltage, Combination Single-Ended
8-to-1/Differential 4-to-1 Multiplexer
(V+ = +5V ±10%, V- = 0, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
(Note 2)
PARAMETER
Charge Injection
SYMBOL
VCTE
CONDITIONS
CONDITIONS
CONDITIONS
CL = 1nF, VNO_ = 0,
Figure 4
MIN
TYP
MAX
UNIT
TA = +25°C
1
5
pC
TA = +25°C
30
70
LATCH TIMING (Note 3)
Setup Time
tS
Figure 7
Hold Time
tH
Figure 7
TA = TMIN to TMAX
80
TA = +25°C
-10
TA = TMIN to TMAX
-10
0
ns
ns
ELECTRICAL CHARACTERISTICS—Single +3V Supply
(V+ = +2.7V to +3.6V, V- = 0, VIH = 2.4V, VIL = 0.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
CONDITIONS
CONDITIONS
MIN
TYP
MAX
UNIT
V+
V
220
500
SWITCH
Analog Signal Range
(Note 3)
On-Resistance
ICOM_ = 0.2mA,
VNO_ = 1.5V,
V+ = 2.7V
RON
LOGIC INPUTS (Note 3)
Input High Voltage
IIH
Input Low Voltage
IIL
0
TA = +25°C
TA = TMIN to TMAX
Ω
600
2.4
1.1
V
1.0
0.6
V
DYNAMIC (Note 3)
Transition Time
tTRANS
VNO1 = 1.5V,
VNO8 = 0, Figure 1
TA = +25°C
200
310
ns
Enable Turn-On Time
tON
VNO1 = 1.5V,
Figure 3
TA = +25°C
160
250
ns
Enable Turn-Off Time
tOFF
VNO1 = 1.5V,
Figure 3
TA = +25°C
120
180
ns
45
80
ns
LATCH TIMING (Note 3)
Setup Time
tS
Figure 7
TA = +25°C
Hold Time
tH
Figure 7
TA = +25°C
-10
0
ns
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: ∆RON = RON(MAX) - RON(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 = 20log10(VCOM / VNO), VCOM = output, VNO = input to off switch.
Note 8: Between any two switches.
Note 9: Leakage testing at single supply is guaranteed by testing with dual supplies.
_______________________________________________________________________________________
5
MAX4598
ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM AND
TEMPERATURE (SINGLE SUPPLY)
90
50
80
70
150
RON (Ω)
60
30
TA = +25°C
20
TA = +85°C
TA = +70°C
RON (Ω)
40
RON (Ω)
190
170
50
TA = +25°C
40
TA = -40°C
V+ = +5V
V- = -5V
V+ = +5V
V- = 0
10
0
50
0
-3
-2
-1
0
1
2
3
4
5
30
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VCOM (V)
VCOM (V)
ON-RESISTANCE vs. VCOM
(DUAL SUPPLIES)
LEAKAGE CURRENT
vs. TEMPERATURE
100
V+ = +2.7V
V- = -2.7V
80
70
V+ = +3V
V- = -3V
60
50
V+ = +5V
V- = -5V
40
SUPPLY CURRENT vs. TEMPERATURE
10n
LEAKAGE CURRENT (A)
90
10p
COM (OFF)
1p
-3
-2
-1
0
1
2
3
4
I-
100p
10p
1p
10f
1f
-40 -20
5
I+
1n
0
20
40
60
80
100 120
-40 -20
TEMPERATURE (°C)
VCOM (V)
70
40
140
MAX4598-07
V+ = +5V
V- = -5V
20
60
120
tON, tOFF (ns)
tON, tOFF (ns)
100
60
tON
50
tOFF
40
60
tOFF
20
0
20
-40
0
25
TEMPERATURE (°C)
6
tON
80
40
30
70
85
80 100 120 140
TEMPERATURE (°C)
TURN-ON/TURN-OFF TIMES
vs. SUPPLY VOLTAGE (DUAL SUPPLIES)
TURN-ON/TURN-OFF TIMES
vs. TEMPERATURE
80
0
MAX4598-08
-4
10n
100f
NO (OFF)
10f
-5
V+ = +5V
V- = -5V
100n
COM (ON)
100f
30
1000n
1n
100p
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VCOM (V)
100n
MAX4598-04
110
0
SUPPLY CURRENT (A)
-4
MAX4598-05
-5
V+ = +5V
70
20
10
V+ = +3V
110
90
30
TA = -40°C
V+ = +2.7V
130
MAX4598-06
TA = +70°C
MAX4598-02
TA = +85°C
MAX4598-01
60
ON-RESISTANCE vs. VCOM
(SINGLE SUPPLY)
MAX4598-03
ON-RESISTANCE vs. VCOM AND
TEMPERATURE (DUAL SUPPLIES)
RON (Ω)
MAX4598
Low-Voltage, Combination Single-Ended
8-to-1/Differential 4-to-1 Multiplexer
2
3
4
5
V+, V- (V)
_______________________________________________________________________________________
Low-Voltage, Combination Single-Ended
8-to-1/Differential 4-to-1 Multiplexer
180
6
5
100
4
-30
60
OFF-ISOLATION
-40
20
-50
-20
ON-PHASE
-60
-60
2
1
-70
-100
0
-80
-140
-1
-180
-2
-90
0.1
1
10
100
1000
FREQUENCY (MHz)
Pin Description
PIN
NAME
FUNCTION
1
COMB
2
A1
Address Bit 1
3
A0
Address Bit 0
4
NO4
Channel Input 4
5
NO2
Channel Input 2
6
NO3
Channel Input 3
7
NO1
Channel Input 1
8
V-
Negative Supply Voltage
Positive Supply Voltage
Multiplexer Output B
9
V+
10
COMA
11
NLATCH
12
LATCH
13
EN
14
NO5
Channel Input 5
15
NO7
Channel Input 7
16
NO6
Channel Input 6
17
NO8
Channel Input 8
18
A3
Address Bit 3
19
A2
Address Bit 2
20
GND
Multiplexer Output A
Data-Strobe Mode Select
Latch Input
Multiplexer Enable
Ground
V+ = +5V
V- = -5V
3
Q (pC)
INSERTION LOSS
PHASE (°C)
140
-20
-10
LOSS (dB)
CHARGE INJECTION vs. VCOM
MAX4598-09
MAX4598-10
FREQUENCY RESPONSE
0
V+ = +5V
V- = 0
-5
-4
-3
-2
-1
0
1
2
3
4
5
VCOM (V)
_______________Detailed Description
The MAX4598 can be configured as a single 8-channel
or dual 4-channel multiplexer. In the single 8-to-1 multiplexer 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).
The MAX4598 functions as a standard multiplexer
when NLATCH is high. When NLATCH is low, the condition set by A0 to A3 is activated at the rising edge of
LATCH. Otherwise, the outputs remain at the previously
set condition.
__________Applications Information
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 between each analog signal pin and V+ and V-. If the voltage 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-.
_______________________________________________________________________________________
7
MAX4598
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
Low-Voltage, Combination Single-Ended
8-to-1/Differential 4-to-1 Multiplexer
MAX4598
Truth Table
A3
A2
A1
A0
EN
LATCH
NLATCH
COMA
COMB
x
x
x
x
0
x
x
High-Z
High-Z
x
x
x
x
1
0
State is latched on the
rising edge of LATCH
State is latched on the
rising edge of LATCH
0
0
0
0
1
x
1
NO1
GND
0
0
0
1
1
x
1
NO2
GND
0
0
1
0
1
x
1
NO3
GND
0
0
1
1
1
x
1
NO4
GND
0
1
0
0
1
x
1
NO5
GND
0
1
0
1
1
x
1
NO6
GND
0
1
1
0
1
x
1
NO7
GND
0
1
1
1
1
x
1
NO8
GND
1
0
0
0
1
x
1
NO1
NO2
1
0
0
1
1
x
1
NO3
NO4
1
0
1
0
1
x
1
NO5
NO6
1
0
1
1
1
x
1
NO7
NO8
1
1
0
0
1
x
1
GND
GND
1
1
0
1
1
x
1
V+
GND
1
1
1
0
1
x
1
NO8
NO8
1
1
1
1
1
x
1
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 signal 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.
There is no connection between the analog signal
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.
V+ and GND power the internal logic and logic-level
translators, and set the input logic thresholds. The
logic-level translators convert the logic levels to
switched V+ and V- signals to drive the analog switch
gates. This drive signal is the only connection between
8
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 thresholds, 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-compatible 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.
Bipolar-Supply Operation
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.
_______________________________________________________________________________________
Low-Voltage, Combination Single-Ended
8-to-1/Differential 4-to-1 Multiplexer
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,
When power to the MAX4598 is off (i.e., V+ = V- = 0),
the Absolute Maximum Ratings still apply: neither logiclevel inputs on NO_ nor signals on COM_ can exceed
±0.3V. Voltages beyond ±0.3V cause the internal ESDprotection diodes to conduct, and the parts can be
damaged if excessive current flows.
Power Off
Test Circuits/Timing Diagrams
+5V
NLATCH
EN
LATCH
A3
V+
A0
A1
A2
LOGIC
INPUT
VEN
V+
NO1
+3V
V+
0V
NO2–NO7
VNO1
NO8
MAX4598
-3V
COMA
V-
GND
VOUT
SWITCH
OUTPUT
VOUT
90%
0V
90%
35pF
300Ω
50Ω
50%
50%
tR < 20ns
tF < 20ns
VNO8
-5V
tTRANS
tTRANS
Figure 1. Transition Time
+5V
EN
NLATCH
V+
LOGIC
INPUT
VA
LATCH
NO1–NO8
A3
A0
VA
MAX4598
50Ω
50%
50%
tR < 20ns
tF < 20ns
0V
VOUT
90%
A1
A2
+3V
V+
COMA
V-
GND
VOUT
300Ω
35pF
SWITCH
OUTPUT
VCOM
0V
tOPEN
-5V
Figure 2. Break-Before-Make Interval
_______________________________________________________________________________________
9
MAX4598
Single-Supply Operation
off-isolation, and distortion are degraded (see Typical
Operating Characteristics).
Single-supply operation also limits signal levels and
interferes with grounded signals. When V- = 0, AC signals 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.
Caution: The absolute maximum V+ to V- differential
voltage is 13V. Typical “±6 Volt” or “12 Volt” supplies 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.
Low-Voltage, Combination Single-Ended
8-to-1/Differential 4-to-1 Multiplexer
MAX4598
Test Circuits/Timing Diagrams (continued)
tR < 20ns
tF < 20ns
+5V
V+
VEN
VEN
EN
NO1
LATCH
A3
+3V
NO2–NO8
A1
A2 GND
50Ω
50%
0V
VOUT
MAX4598
A0
50%
V+
NLATCH
COMA
V-
90% 90%
VOUT
35pF
1k
-5V
0V
tON
tOFF
Figure 3. Enable Switching Time
+5V
RS
NO
VEN
VS
V+
LOGIC
INPUT
VEN
EN
A0
CHANNEL
SELECT
NLATCH
MAX4598
COMA
V+
ON
OFF
VCOM
A1
∆VOUT
A2
A3
GND
CL
1nF
V-
VCOM
∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
ERROR Q WHEN THE CHANNEL TURNS OFF.
-5V
Q = (∆VOUT) (CL)
Figure 4. Charge Injection
+5V 10nF
V+
VIN
V-
EN
VOUT
MAX4598
V
OFF-ISOLATION = 20log OUT
VIN
V
CROSSTALK = 20log OUT
VIN
MEAS.
REF
COM_
A_
LATCH
NETWORK
ANALYZER
50Ω
50Ω
NO_
NLATCH
V+
V-
GND
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
ON
0V
______________________________________________________________________________________
Low-Voltage, Combination Single-Ended
8-to-1/Differential 4-to-1 Multiplexer
____________________Chip Topography
A0
A1
COMB GND
A2
A3
+5V
NLATCH
V+
A3
NO1
A2
CHANNEL
SELECT
NO8
1MHz
CAPACITANCE
ANALYZER
NO8
MAX4598
A1
COM_
A0
GND
LATCH,
EN
NO4
0.104"
(2.64mm)
NO2
V-
NO3
-5V
NO1
NO6
NO7
NO5
Figure 6. NO_/COM_ Capacitance
+5V
V- V+
COMA
LATCH
EN
NLATCH
EN
V+
0.092"
(2.34mm)
LATCH
+3V
NO2
NO1, NO3–NO8
A0
A1
A2
MAX4598
A3
NLATCH
GND
TRANSISTOR COUNT: 287
SUBSTRATE CONNECTED TO V+
COM
V-
-5V
LATCH
50%
tS
tH
ADDRESS
VIH
VIL
NOTE: TIMING MEASUREMENT REFERENCE LEVEL IS
VIH - VIL
2
Figure 7. Setup Time, Hold Time
______________________________________________________________________________________
11
MAX4598
Test Circuits/Timing Diagrams
(continued)
MAX4598
Low-Voltage, Combination Single-Ended
8-to-1/Differential 4-to-1 Multiplexer
NOTES
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 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 1998 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.