Maxim MAX4639EGP 3.5â ¦, single 8:1 and dual 4:1, low-voltage analog multiplexer Datasheet

19-1782; Rev 1; 3/02
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
Features
The MAX4638/MAX4639 are single 8:1 and dual 4:1
CMOS analog multiplexers/demultiplexers (muxes/
demuxes). Each mux operates from a single +1.8V to
+5V supply or dual ±2.5V supplies. These devices feature 3.5Ω on-resistance (RON) when powered with a
single +5V supply and have -75dB of off-isolation and
-85dB crosstalk from the output to each off channel.
The switching times are 18ns tON and 7ns tOFF. They
feature a -3dB 85MHz bandwidth and a guaranteed
0.25nA leakage current at +25°C.
♦ Guaranteed RON
3.5Ω (+5V or ±2.5V Supplies)
6Ω (+3V Supply)
♦ Guaranteed 0.4Ω RON Match Between Channels
A +1.8V to +5.5V operating range makes the MAX4638/
MAX4639 ideal for battery-powered, portable instruments. All channels guarantee break-before-make
switching. These parts feature bidirectional operation
and can handle Rail-to-Rail® analog signals. All control
inputs are TTL/CMOS-logic compatible. Decoding is in
standard BCD format, and an enable input is provided to
simplify cascading of devices. These devices are available in small 16-pin QFN, TSSOP and SOIC packages,
as well as a 20-pin QFN package.
♦ +1.8V to +5.5V Single-Supply Operation
±2.5V Dual-Supply Operation
♦ Rail-to-Rail Signal Handling
♦ Guaranteed 1Ω RON Flatness Over Signal Range
♦ Guaranteed Low Leakage Currents
0.25nA at +25°C
♦ Switching Times: tON = 18ns, tOFF = 7ns
♦ TTL/CMOS-Logic Compatible
♦ Crosstalk: -80dB (1MHz)
♦ Off-Isolation: -60dB (10MHz)
Applications
Ordering Information
Automatic Test Equipment
TEMP RANGE
PIN-PACKAGE
Low-Voltage Data-Acquisition Systems
MAX4638EGE
PART
-40°C to +85°C
16 QFN (4 ✕ 4)
Audio and Video Signal Routing
MAX4638EUE
-40°C to +85°C
16 TSSOP
Medical Equipment
MAX4638ESE
-40°C to +85°C
16 SO
Battery-Powered Equipment
MAX4638EGP
-40°C to +85°C
20 QFN (4 ✕ 4)
Ordering Information continued at end of data sheet.
Relay Replacement
Pin Configurations/Functional Diagrams
TOP VIEW
MAX4638
A0 1
EN 2
V- 3
LOGIC
MAX4639
16 A1
A0 1
15 A2
EN 2
14 GND
V- 3
16 A1
15 GND
LOGIC
14 V+
NO1 4
13 V+
NO1A 4
13 NO1B
NO2 5
12 NO5
NO2A 5
12 NO2B
NO3 6
11 NO6
NO3A 6
11 NO3B
NO4 7
10 NO7
NO4A 7
10 NO4B
NO8
COMA 8
9
COM 8
9
TSSOP/SO
COMB
TSSOP/SO
Rail-to-Rail is a Registered Trademark of Nippon Motorola, Ltd.
________________________________________________________________ Maxim Integrated Products
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.
1
MAX4638/MAX4639
General Description
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
ABSOLUTE MAXIMUM RATINGS
(Voltages Referenced to GND)
V+ to V- .................................................................................+6V
V+, A_, EN ...............................................................-0.3V to +6V
V- ............................................................................+0.3V to -6V
NO_, COM_ (Note1) .................................... -0.3V to (V+ + 0.3V)
Continuous Current A_, EN ............................................. ±30mA
Continuous Current NO_, COM_ .................................. ±100mA
Peak Current (NO_, COM_)
(pulsed at 1ms, 10% duty cycle) .............................. ±200mA
Continuous Power Dissipation (TA = +70°C)
16-Pin QFN (derate 18.5mW/°C above +70°C) ........ 1481mW
16-Pin TSSOP (derate 5.7mW/°C above +70°C) ........ 457mW
16-Pin SO (derate 8.70mW/°C above +70°C) ............ 696mW
20-Pin QFN (derate 20mW/°C above +70°C) .......... 1600mW
Operating Temperature Range
MAX463_E_ E ............................................... -40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ........................... -65°C to +150°C
Lead Temperature (soldering, 10s) ............................... +300°C
Note 1: Signals on COM_, NO_ exceeding V+ or V- are clamped by internal diodes. A_ and EN are clamped only to V- and can
exceed V+ up to their maximum ratings. Limit forward-diode current to maximum current rating.
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—+5V Single 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.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
(Note 2)
MAX
UNITS
V+
V
ANALOG SWITCH
Analog Signal Range
On-Resistance
On-Resistance Match
Between Channels (Notes 3, 8)
VCOM_,
VNO_
RON
∆RON
On-Resistance Flatness (Note 4)
RFLAT(ON)
NO_ Off-Leakage Current
(Note 5)
INO_(OFF)
0
V+ = +4.5V, ICOM_ = 10mA, TA = +25°C
VNO_ = +3.5V
TA = TMIN to TMAX
V+ = +4.5V, ICOM_ = 10mA, TA = +25°C
VNO_ = +3.5V
TA = TMIN to TMAX
2.5
V+ = +4.5V; ICOM_ = 10mA; TA = +25°C
VNO_ = +1V, +2V, +3.5V
TA = TMIN to TMAX
V+ = +5.5V; VCOM _ = +1V, TA = +25°C
+4.5V; VNO_ = +4.5V, +1V
TA = TMIN to TMAX
0.75
3.5
4.5
0.1
0.4
0.5
1
1.2
-0.25
±0.01
-0.35
COM_ Off-Leakage Current
(Note 5)
ICOM_(OFF)
V+ = +5.5V; VCOM_ = +1V,
+4.5V; VNO_ = +4.5V, +1V
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.75
COM_ On-Leakage Current
(Note 5)
V+ = +5.5V; VCOM_ = +1V,
ICOM_(ON) +4.5V; VNO_ = +1V, +4.5V,
or floating
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.75
0.25
0.35
±0.01
0.25
0.75
±0.01
Ω
Ω
Ω
nA
nA
0.25
nA
0.75
DIGITAL I/O
Input Logic High
VIH
Input Logic Low
VIL
Input Leakage Current
Digital Input Capacitance
IIH, IIL
2.4
VIN_ = 0 or V+
-0.1
CIN
V
0.005
0.8
V
0.1
µA
2
pF
DYNAMIC
Transition Time (Note 5)
2
tTRANS
RL = 100Ω, CL = 35pF,
VNO1 = +3V or 0,
VNO8 = 0 or +3V, Figure 2
TA = +25°C
14
18
ns
TA = TMIN to TMAX
_______________________________________________________________________________________
20
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
(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.)
PARAMETER
Break-Before-Make (Note 5)
Enable Turn-On Time (Note 5)
Enable Turn-Off Time (Note 5)
On-Channel -3dB Bandwidth
Charge Injection
SYMBOL
CONDITIONS
tBBM
RL = 100Ω, CL = 35pF,
VNO_ = +3V, Figure 3
TA = +25°C
RL = 100Ω, CL = 35pF,
VNO1 = +3V, VNO2 to
VNO8 = 0, Figure 4
TA = +25°C
tON(EN)
RL = 100Ω, CL = 35pF,
VNO1 = +3V, VNO2 to
VNO8 = 0, Figure 4
TA = +25°C
tOFF(EN)
BW
Q
Signal =
0dBm,
CL = 5pF,
50Ω in and
out, Figure 6
VCT
Total Harmonic Distortion
THD
14
18
ns
TA = TMIN to TMAX
20
5
7
ns
TA = TMIN to TMAX
TA = +25°C
8
50
MHz
MAX4639
13
pC
VNO_ = 0V, f = 1MHz,
Figure 8
TA = +25°C
9
pF
MAX4638
TA = +25°C
40
MAX4639
TA = +25°C
20
MAX4638
TA = +25°C
54
MAX4639
TA = +25°C
34
TA = +25°C
-55
VCOM_ =
VNO_ = 0V,
f = 1MHz,
Figure 8
pF
pF
CL = 5pF, RL = 50Ω,
f = 1MHz, VNO_ =
1VRMS , Figure 6
Crosstalk (Note 7)
ns
1
TA = +25°C
VCOM_ = 0V,
CCOM_(OFF) f = 1MHz,
Figure 8
VISO
8
UNITS
VGEN = +2.5V, RGEN = 0,
CL = 1.0nF, Figure 5
COM_ Off-Capacitance
Off-Isolation (Note 6)
MAX
85
CNO_(OFF)
C(ON)
TYP
(Note 2)
TA = +25°C
NO_ Off-Capacitance
Switch On-Capacitance
MAX4638
TA = TMIN to TMAX
MIN
dB
CL = 5pF, RL = 50Ω,
f = 10MHz, VNO_ =
1VRMS , Figure 6
TA = +25°C
-75
CL = 5pF, RL = 50Ω,
f = 10MHz, VNO_=
1VRMS , Figure 7
TA = +25°C
-65
CL = 5pF, RL = 50Ω,
f = 1MHz, VNO_ =
1VRMS, Figure 7
TA = +25°C
-85
RL = 600Ω,
RFLAT(ON)/RL
TA = +25°C
0.5
dB
%
SUPPLY
Positive Supply Current
I+
V+ = +5.5V, VIN = 0 or V+
0.001
1.0
µA
_______________________________________________________________________________________
3
MAX4638/MAX4639
ELECTRICAL CHARACTERISTICS—+5V Single Supply (continued)
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
ELECTRICAL CHARACTERISTICS—+3.0V Single Supply
(V+ = +2.7V to +3.3V, V- = 0, VIH = +2.0V, VIL = +0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V+ = +3V
and TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
(Note 2 )
MAX
UNITS
V+
V
ANALOG SWITCH
Analog Signal Range
On-Resistance
On-Resistance Match
Between Channels (Notes 3, 8)
On-Resistance Flatness (Note 4)
VCOM_,
VNO_
0
RON
ICOM_ = 10mA,
VNO_ = +1.7V
TA = +25°C
∆RON
ICOM_ = 10mA,
VNO_ = +1.7V
TA = +25°C
ICOM_ = 10mA;
VNO_ = +1.5V, +1.7V,
+1.9V
TA = +25°C
RFLAT(ON)
4.5
TA = TMIN to TMAX
8
0.25
TA = TMIN to TMAX
1
TA = TMIN to TMAX
2
2.5
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.35
COM_ Off-Leakage Current
(Note 5)
V+ = +3.3V;
ICOM_(OFF) VCOM_ = +1V, +3V;
VNO_ = +3V, +1V
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.35
COM_ On-Leakage Current
(Note 5)
V+ = +3.3V; VCOM_
ICOM_(ON) = +1V, +3V; VNO_ =
+1V, +3V, or floating
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.35
INO_(OFF)
0.6
0.8
V+ = +3.3V;
VCOM_ = +1V, +3V;
VNO_ = +3V, +1V
NO_ Off-Leakage Current
(Note 5)
6
±0.01
Ω
Ω
Ω
0.25
nA
0.35
±0.01
0.25
nA
0.35
±0.01
0.25
nA
0.35
DIGITAL I/O
Input Logic High
Input Logic Low
Input Leakage Current
Digital Input Capacitance
VIH
2.0
V
VIL
IIH, IIL
VIN_ = 0 or V+
-0.1
CIN
0.005
0.4
V
0.1
µA
2
pF
DYNAMIC
tTRANS
VNO_ = +2V, CL = 35pF,
RL = 100Ω, Figure 2
TA = +25°C
tBBM
VNO_ = +2V, CL = 35pF,
RL = 100Ω, Figure 3
TA = +25°C
Enable Turn-On Time (Note 5)
tON(EN)
VNO_ = +2V, CL = 35pF,
RL = 100Ω, Figure 4
TA = +25°C
Enable Turn-Off Time (Note 5)
tOFF(EN)
VNO_ = +2V, CL = 35pF,
RL = 100Ω, Figure 4
TA = +25°C
Transition Time (Note 5)
Break-Before-Make (Note 5)
4
16
TA = TMIN to TMAX
TA = TMIN to TMAX
20
24
8
ns
1
15
TA = TMIN to TMAX
20
24
5
TA = TMIN to TMAX
_______________________________________________________________________________________
ns
9
10
ns
ns
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
(V+ = +2.7V to +3.3V, V- = 0, VIH = +2.0V, VIL = +0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V+ = +3V
and TA = +25°C.)
PARAMETER
Off-Isolation (Note 6)
Crosstalk (Note 7)
SYMBOL
VISO
VCT
On-Channel -3dB Bandwidth
BW
CONDITIONS
TA = +25°C
CL = 5pF, RL = 50Ω,
f = 1MHz, VNO_ = 1VRMS,
Figure 6
TA = +25°C
-75
CL = 5pF, RL = 50Ω,
f = 10MHz, VNO_ = 1VRMS,
Figure 7
TA = +25°C
-65
dB
-85
TA = +25°C
50
TA = +25°C
85
TA = +25°C
9
MAX4638
TA = +25°C
40
MAX4639
TA = +25°C
20
VCOM = VNO_ MAX4638
= 0V,
f = 1MHz,
MAX4639
Figure 8
TA = +25°C
54
TA = +25°C
34
Signal =
MAX4638
0dBm, 50Ω in
and out,
MAX4639
Figure 6
VNO_ = 0V, f = 1MHz,
Figure 8
VCOM_ = 0V,
CCOM_(OFF) f = 1MHz,
Figure 8
I+
UNITS
55
TA = +25°C
COM_ Off-Capacitance
SUPPLY
Positive Supply Current
MAX
dB
CL = 5pF, RL = 50Ω,
f = 1MHz, VNO_ = 1VRMS,
Figure 7
CNO_(OFF)
C(ON)
TYP
(Note 2 )
CL = 5pF, RL = 50Ω,
f = 10MHz,
VNO_ = +1VRMS , Figure 6
NO_ Off-Capacitance
Switch On-Capacitance
MIN
MHz
pF
pF
pF
V+ = +3.3V, VIN_ = 0 or V+
0.001
1
µA
ELECTRICAL CHARACTERISTICS—±2.5V Dual Supplies
(V+ = +2.5 ±10%, V- = -2.5V ±10%, VIH = +2.0V, VIL = +0.4V, TA =TMIN to TMAX, unless otherwise noted. Typical values are at
V± = ±2.5V and TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
(Note 2 )
MAX
UNITS
V+
V
ANALOG SWITCH
Analog Signal Range
On-Resistance
VCOM_,
VNO_
RON
On-Resistance Match
Between Channels (Notes 3, 8)
∆RON
VICOM_ = 10mA, VNO_ = ±1.5V, TA = +25°C
V+ = +2.25V, V- = -2.25V
TA = TMIN to TMAX
ICOM_ = 10mA, VNO_ = ±1.5V, TA = +25°C
V+ = +2.25V, V- = -2.25V
TA = TMIN to TMAX
2.5
3.5
4.5
0.2
0.4
0.5
Ω
Ω
_______________________________________________________________________________________
5
MAX4638/MAX4639
ELECTRICAL CHARACTERISTICS—+3.0V Single Supply (continued)
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
ELECTRICAL CHARACTERISTICS—±2.5V Dual Supplies (continued)
(V+ = +2.5 ±10%, V- = -2.5V ±10%, VIH = +2.0V, VIL = +0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
V± = ±2.5V and TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
On-Resistance Flatness
(Note 4)
I
= 10mA; VNO_ = ±1.5V, TA = +25°C
RFLAT(ON) COM_
0; V+ = +2.25V; V- = -2.25V TA = TMIN to TMAX
NO_ Off-Leakage
Current (Note 5)
V+ = +2.75V; V- = -2.75V;
INO_ (OFF) VCOM_ = +1V, +2.5V;
VNO_ = +2.5V, +1V
MIN
TYP
(Note 2 )
MAX
0.75
1
1.2
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.35
COM_ Off-Leakage
Current (Note 5)
V+ = +2.75V; V- = -2.75;
ICOM_ (OFF) VCOM_ = +1V, +2.5V;
VNO_ = +2.5V, +1V
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.35
COM_ On-Leakage
Current (Note 5)
V+ = +2.5V; V- = -2.5;
VCOM_ = +1V, +2.5V;
ICOM_ (ON)
VNO_ = +1V, +2.5V, or
floating
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.35
±0.01
UNITS
Ω
0.25
nA
0.35
±0.01
0.25
nA
0.35
±0.01
0.25
nA
0.35
DIGITAL I/O
Input Logic High
VIH
Input Logic Low
VIL
Input Leakage Current
Digital Input Capacitance
IIH, IIL
2.0
VIN_ = 0 or V+
-0.1
CIN
V
0.005
0.4
V
0.1
µA
2
pF
DYNAMIC
Transition Time (Note 5)
tTRANS
Enable Turn-On Time
(Note 5)
tON(EN)
Enable Turn-Off Time
(Note 5)
tOFF(EN)
Break-Before-Make (Note 5)
tBBM
VNO_ = +1.2V, CL = 35pF,
RL = 100Ω, Figure 2
TA = +25°C
VNO_ = +1.2V, CL = 35pF,
RL = 100Ω, Figure 4
TA = +25°C
VNO_ = +1.2V, CL = 35pF,
RL = 100Ω, Figure 4
TA = +25°C
VNO_ = +1.2V, CL = 35pF,
RL = 100Ω, Figure 3
TA = +25°C
16
20
ns
TA = TMIN to TMAX
24
14
18
ns
TA = TMIN to TMAX
20
5
7
ns
TA = TMIN to TMAX
8
8
ns
TA = TMIN to TMAX
1
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: ∆RON = RON(MAX) - RON(MIN).
Note 4: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal ranges.
Note 5: Guaranteed by design.
Note 6: Off-Isolation = 20log10 (VCOM_ / VNO_), VCOM_ = output, VNO_ = input to off switch.
Note 7: Between any two switches.
Note 8: ∆RON matching specifications for QFN packaged parts are guaranteed by design.
6
______________________________________________________________________________________
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
20
V+ = +5V
3.5
6
TA = +85°C
V+ = +3V
5
TA = +85°C
10
4
2.5
2.0
TA = -40°C
RON (Ω)
R0N (Ω)
TA = +25°C
1.5
V+ = +3V
1
0.5
V+ = +5V
0
0
0
VCOM (V)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
CHARGE (pC)
120
V+ = +5V
12
10
8
6
100
3.0
1
0.1
0.01
2
60
0
0.001
-2.5
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
-0.5
1.5
5.5
3.5
-40
-15
10
35
60
SUPPLY VOLTAGE (V)
VCOM (V)
TEMPERATURE (°C)
LOGIC LEVEL THRESHOLD vs.
SUPPLY VOLTAGE AND TEMPERATURE
ENABLE TURN-ON/TURN-OFF TIME
vs. SUPPLY VOLTAGE
ENABLE TURN-ON/TURN-OFF TIME
vs. TEMPERATURE
1.6
40
35
TA = -40°C
tON
25
20
TA = +85°C
10
0
2.8
3.3
3.8
4.3
SUPPLY VOLTAGE (V)
4.8
5.3
tOFF
8
2
5
2.3
10
4
tOFF
0.8
0.6
tON
6
15
1.0
85
12
TIME (ns)
TA = +25°C
1.2
1.8
14
30
TIME (ns)
1.4
16
MAX4638 toc08
45
MAX4638 toc07
1.8
LOGIC VOLTAGE (V)
2.5
10
4
80
2.0
SUPPLY CURRENT
vs. TEMPERATURE
14
140
1.5
CHARGE INJECTION vs. VCOM
16
160
1.0
VCOM (V)
V± = ±2.5V
18
0.5
VCOM (V)
SUPPLY CURRENT (nA)
180
SUPPLY CURRENT (pA)
20
MAX4638 toc04
200
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
MAX4638 toc06
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
MAX4638 toc05
0
TA = +25°C
TA = -40°C
2
1.0
5
0
3
MAX4638 toc09
RON (Ω)
3.0
15
MAX4638 toc03
V+ = +1.8V
MAX4638 toc02
4.0
MAX4638 toc01
25
ON-RESISTANCE vs. VCOM AND
TEMPERATURE
ON-RESISTANCE vs. VCOM AND
TEMPERATURE
ON-RESISTANCE vs. VCOM
0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
SUPPLY VOLTAGE (V)
5.0
5.5
-40
-15
10
35
60
85
TEMPERATURE (°C)
_______________________________________________________________________________________
7
MAX4638/MAX4639
Typical Operating Characteristics
(V+ = +5V, V- = 0, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(V+ = +5V, V- = 0, TA = +25°C, unless otherwise noted.)
OFF-ISOLATION
-60
CROSSTALK
-80
10
ON-LEAKAGE
1
OFF-LEAKAGE
-120
0.06
0.04
0.1
0.02
0.01
-100
0
0.001
0.01
0.1
1
10
100
V+ = +2.5V
V- = -2.5V
5Vp-p SIGNAL
600Ω IN AND OUT
0.08
THD (%)
LEAKAGE CURRENT (pA)
-40
MAX4638 toc12
100
ON-RESPONSE MAX4639
0.10
MAX4638 toc11
ON-RESPONSE MAX4638
-20
1000
MAX4638 toc10
0
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
ON/OFF-LEAKAGE CURRENT
vs. TEMPERATURE
FREQUENCY RESPONSE
RESPONSE (dB)
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
1000
-40
-20
FREQUENCY (MHz)
0
20
40
60
0.01
80
0.1
1
10
100
FREQUENCY (kHz)
TEMPERATURE (°C)
Pin Description
PIN
MAX4638
MAX4639
NAME
QFN
DIP/SO
DIP/SO
8
FUNCTION
QFN
16-PIN
20-PIN
16-PIN
20-PIN
1, 15, 16
15, 14, 13
19, 18, 17
—
—
—
A0, A2, A1
Address Inputs
—
—
—
1, 16
15, 14
19, 17
A0, A1
Address Inputs
2
16
1
2
16
1
EN
Enable
3
1
2
3
1
2
V-
Negative-Supply Voltage Input
4–7
2–5
3–6
—
—
—
NO1–N04
Bidirectional Analog Inputs
—
—
—
4–7
2–5
3–6
NO1A–NO4A
Bidirectional Analog Inputs
8
6
7
—
—
—
COM
Bidirectional Analog outputs
—
—
—
8, 9
6, 7
7, 9
COMA, COMB
Bidirectional Analog outputs
9–12
7–10
10–13
—
—
—
NO8–NO5
Bidirectional Analog Inputs
—
—
—
10–13
8–11
10–13
NO4B–NO1B
Bidirectional Analog Inputs
13
11
14
14
12
14
V+
14
12
15
15
13
15
GND
Ground
—
—
8, 9,
16, 20
—
—
8, 16,
18, 20
N.C.
No Connection
Positive-Supply Voltage Input
_______________________________________________________________________________________
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
The MAX4638/MAX4639 are low-voltage, CMOS analog
muxes. The MAX4638 is an 8:1 mux that switches one
of eight inputs (NO1–NO8) to a common output (COM)
as determined by the 3-bit binary inputs A0, A1, and
A2. The MAX4639 is a 4:1 dual mux that switches one
of four differential inputs to a common differential output as determined by the 2-bit binary inputs A0 and A1.
Both the MAX4638/MAX4639 have an EN input that can
be used to enable or disable the device. When disabled, all channels are switched off. See Truth Tables.
+2.5V
MAX4638
MAX4639
D1
V+
*
*
NO_
COM_
*
*
V-
Applications Information
D2
Overvoltage Protection
Proper power-supply sequencing is recommended for
all CMOS devices. Do not exceed the absolute maximum ratings because stresses beyond the listed ratings can cause permanent damage to the devices.
Always sequence V+ on first, then V-, followed by the
logic inputs. If power-supply sequencing is not possible, add two small-signal diodes (D1, D2) in series with
the supply pins for overvoltage protection (Figure 1).
Adding diodes reduces the analog signal range to one
diode drop below V+ and one diode drop above V-, but
does not affect the devices’ low switch resistance.
Device operation is unchanged, and the difference
between V+ and V- should not exceed 6V. These protection diodes are not recommended when using a single supply. For single-supply operation, V- should be
connected to GND as close to the device as possible.
MAX4638/MAX4639
Detailed Description
-2.5V
* INTERNAL PROTECTION DIODES
Figure 1. Overvoltage Protection Using External Blocking
Diodes
Ordering Information (continued)
TEMP RANGE
PIN-PACKAGE
MAX4639EGE
PART
-40°C to +85°C
16 QFN (4 ✕ 4)
MAX4639EUE
-40°C to +85°C
16 TSSOP
MAX4639ESE
-40°C to +85°C
16 SO
MAX4639EGP
-40°C to +85°C
20 QFN (4 ✕ 4)
Truth Tables
MAX4638 (Single 8-to-1 Mux)
MAX4639 (Dual 4-to-1 Mux)
A2
A1
A0
EN
ON SWITCH
A1
A0
EN
COMA
X
X
X
0
None
X
X
0
None
COMB
None
0
1
NO1A
NO1B
0
0
0
1
NO1
0
0
0
1
1
NO2
0
1
1
NO2A
NO2B
0
1
0
1
NO3
1
0
1
NO3A
NO3B
1
1
1
NO4A
NO4B
0
1
1
1
NO4
1
0
0
1
NO5
1
0
1
1
NO6
1
1
0
1
NO7
1
1
1
1
NO8
_______________________________________________________________________________________
9
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
Test Circuits/Timing Diagrams
V+
V+
NO1
A2
A1
A0
50Ω
MAX4638
VIH
VNO1
NO2–NO7
NO8
VNO8
EN
COM
GND
VIN
V-
VOUT
100Ω
35pF
ADDRESS
INPUT
VIN
V-
V+
A1
0
tTRANS
NO1B
10%
90%
SWITCH
OUTPUT
VOUT
VNO1
NO1A–NO4A
A0
50%
VN01
V+
tR < 5ns
tF < 5ns
+3V
VN08
50Ω
MAX4639
VIH
EN
NO4B
COMB
V100Ω
GND
VIN
tTRANS
VNO8
VOUT
35pF
V-
Figure 2. Transition Time
V+
VIH
V+
EN
A0
NO1
NO2–NO7
VNO1
ADDRESS +3V
INPUT
0
VA
MAX4638
VN0_
A1
VA
tR < 5ns
tF < 5ns
50%
90%
VNO8
NO8
A2
GND
COM
VOUT
V-
35pF
50Ω
100Ω
SWITCH
OUTPUT
VOUT
0
tBBM
V-
Figure 3. MAX4638 Break-Before-Make Interval
10
______________________________________________________________________________________
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
V+
VEN
V+
EN
NO1
VNO1
NO2–NO8
A0
A1
MAX4638
A2
COM
GND
50Ω
LOGIC
INPUT
VEN
VOUT
V-
35pF
100Ω
VVEN
NO1B
A0
A1
SWITCH
OUTPUT
VOUT
V+
EN
50%
0V
VNO1
V+
VNO1
tR < 5ns
tF < 5ns
+3V
90%
90%
0V
NO_, COMA
tON(EN)
MAX4639
COMB
V-
GND
50Ω
tOFF(EN)
VOUT
35pF
100Ω
V-
Figure 4. Enable Switching Time
V+
RS
V+
NO_
VEN
VS
CHANNEL
SELECT
LOGIC
INPUT
VEN
EN
A0
A1
MAX4638
MAX4639 COM
+3V
OFF
ON
OFF
ON
ON
OFF
0
VOUT
A2
GND
V-
CL
1nF
∆VOUT
VOUT
∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
ERROR Q WHEN THE CHANNEL TURNS OFF.
VQ = ∆VOUT ✕ CL
Figure 5. Charge Injection
______________________________________________________________________________________
11
MAX4638/MAX4639
Test Circuits/Timing Diagrams (continued)
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
Test Circuits/Timing Diagrams (continued)
V+
NO1
VIN
RS = 50Ω
V+
1µF
NO8
R
50Ω
MAX4638
MAX4639 COM
A0
A1
A2
V+
NO1
V+
GND EN
V-
VOUT
VIN
CL
5pF
RL
50Ω
NO2
NO8
A0
RG = 50Ω
A1
A2
GND EN
OFF-ISOLATION = 20log
VOUT
VEN
A1
A0
VEN
TRANSISTOR COUNT: 632
NO8
V-
1MHz
CAPACITANCE
ANALYZER
COM
f = 1MHz
V-
Figure 8. Channel OFF/ON Capacitance
12
VIN
Figure 7. Crosstalk
NO1
MAX4638
MAX4639
EN
VOUT
Chip Information
V+
GND
CL
5pF
RL
50Ω
CROSSTALK = 20log
VIN
V+
CHANNEL
SELECT
V1µF
V-
Figure 6. Off-Isolation/On-Channel Bandwidth
A2
VOUT
MAX4638
COM
MAX4639
VVEN
1µF
______________________________________________________________________________________
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
NO3A
4
11
NO1B
10
NO2B
9
NO3B
EN
A0
A1
GND
15
14
13
A2
13
16
A1
14
N.C.
A1
N.C.
18
17
16
N.C.
16
A0
A2
17
19
A1
18
N.C.
A0
20
N.C.
19
QFN
20
QFN
V+
8
NO6
9
MAX4639
12
NO4B
3
7
2
NO2A
COMB
NO1A
NO5
10
6
V+
11
5
1
GND
NO4A
A0
8
V-
12
COMA
EN
15
NO7
4
7
NO3
MAX4638
NO8
3
6
2
NO2
COM
NO1
5
1
NO4
V-
16
TOP VIEW
EN
1
15
GND
EN
1
15
GND
V-
2
14
V+
V-
2
14
V+
NO1
3
13
NO5
NO1A
3
13
NO1B
NO2B
NO3B
MAX4639
9
10
NO4B
7
COMA
COMB
6
NO4A
QFN
8
10
11
NO8
5
9
4
NO3A
N.C.
NO2A
NO7
8
NO6
12
N.C.
7
11
6
5
NO4
4
NO3
COM
NO2
12
N.C.
MAX4638
QFN
______________________________________________________________________________________
13
MAX4638/MAX4639
Pin Configurations (continued)
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
TSSOP.EPS
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
14
______________________________________________________________________________________
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
SOICN.EPS
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________15
© 2002 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
MAX4638/MAX4639
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
Similar pages