MAXIM MAX4625EUT-T

19-1592; Rev 1; 1/00
1Ω, Low-Voltage, Single-Supply
SPDT Analog Switches
The MAX4624/MAX4625 are pin compatible with the
MAX4544 and are available in space-saving 6-pin
SOT23 packages.
Features
♦ Low RON
1Ω max (+5V Supply)
2Ω max (+3V Supply)
♦ 0.12Ω max RON Flatness (+5V Supply)
♦ Overcurrent Protection
♦ +1.8V to +5.5V Single-Supply Operation
♦ Available in SOT23 Packages
♦ Fast Switching: tON = 50ns max, tOFF = 50ns max
♦ TTL-Logic Compatible (+5V Supply)
♦ Pin Compatible with MAX4544
♦ Guaranteed Break-Before-Make (MAX4624)
♦ Guaranteed Make-Before-Break (MAX4625)
Applications
Ordering Information
Power Routing
Battery-Operated Equipment
Audio and Video Signal Routing
Low-Voltage Data-Acquisition Systems
PART
TEMP. RANGE
PINPACKAGE
TOP
MARK
MAX4624EUT-T
MAX4625EUT-T
-40°C to +85°C
-40°C to +85°C
6 SOT23-6
6 SOT23-6
AADL
AADM
Communications Circuits
PCMCIA Cards
Cellular Phones
Modems
Hard Drives
Pin Configuration/
Functional Diagram/Truth Table
TOP VIEW
MAX4624/MAX4625
IN 1
6
NO
V+ 2
5
COM
GND 3
4
NC
SOT23-6
LOGIC
NC
NO
0
1
ON
OFF
OFF
ON
SWITCHES SHOWN
FOR LOGIC “0” INPUT
________________________________________________________________ Maxim Integrated Products
1
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MAX4624/MAX4625
General Description
The MAX4624/MAX4625 are low-on-resistance, lowvoltage single-pole/double-throw (SPDT) analog switches that operate from a single +1.8V to +5.5V supply.
The MAX4624 has break-before-make switching; the
MAX4625 has make-before-break switching. These
devices also have fast switching speeds (tON = 50ns
max, tOFF = 50ns max).
When powered from a +5V supply, the MAX4624/
MAX4625 offer 1Ω max on-resistance (RON), with 0.12Ω
max R ON matching and flatness. The digital logic
inputs are TTL compatible when using a single +5V
supply. These switches also feature overcurrent protection to prevent damage from short circuits and excessive loads.
MAX4624/MAX4625
1Ω, Low-Voltage, Single-Supply
SPDT Analog Switches
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to GND
V+, IN ....................................................................-0.3V to +6V
COM, NC, NO (Note 1)..............................-0.3V to (V+ + 0.3V)
Continuous Current NO, NC to COM..............................±200mA
Peak Current NO, NC to COM
(pulsed at 1ms, 10% duty cycle max) ........................ ±400mA
Continuous Power Dissipation
6-Pin SOT23-6 (derate 7.1mW/°C above +70°C) .........571mW
Operating Temperature Range
MAX462_EUT....................................................-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 NC, NO, and COM exceeding V+ or GND are clamped by internal diodes.
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—Single +5V Supply
(V+ = +5V ±10%, GND = 0, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V+
V
ANALOG SWITCH
Analog Signal Range
VCOM, VNO,
VNC
0
RON
V+ = 4.5V, VNO or
VNC = 3.5V, ICOM = 100mA
TA = +25°C
∆RON
V+ = 4.5V, ICOM = 100mA,
VNO or VNC = 3.5V
TA = +25°C
On-Resistance Flatness
(Note 5)
RFLAT(ON)
V+ = 4.5V; ICOM = 100mA;
VNO or VNC = 0, 1V, 2V
TA = +25°C
NO or NC Off-Leakage
Current
INO(OFF),
INC(OFF)
V+ = 5.5V; VCOM = 1V, 4.5V; TA = +25°C
VNO or VNC = 4.5V, 1V
TA = TMIN to TMAX
COM On-Leakage
Current
ICOM(ON)
V+ = 5.5V; VCOM = 1V, 4.5V; TA = +25°C
VNO or VNC = 1V, 4.5V, or
TA = TMIN to TMAX
floating
On-Resistance
On-Resistance Match Between
Channels (Note 4)
Overcurrent-Protection
Current Threshold
0.65
TA = TMIN to TMAX
1
1.2
0.06
TA = TMIN to TMAX
0.12
0.15
0.08
TA = TMIN to TMAX
0.12
0.15
-2
0.01
-20
-4
2
20
0.3
Ω
Ω
Ω
nA
4
nA
-40
TA = +25°C
40
1.2
A
DYNAMIC
Turn-On Time
tON
VNO or VNC = 3V, Figure 2
Turn-Off Time
tOFF
VNO or VNC = 3V, Figure 2
Break-Before-Make Delay
(Note 6)
tBBM
MAX4624 only, Figure 3a
Make-Before-Break Delay
(Note 6)
tMBB
MAX4625 only, Figure 3b
2
TA = +25°C
40
TA = TMIN to TMAX
50
60
TA = +25°C
40
TA = TMIN to TMAX
50
60
TA = +25°C
1
TA = TMIN to TMAX
1
TA = +25°C
1
TA = TMIN to TMAX
1
20
6
_______________________________________________________________________________________
ns
ns
ns
ns
1Ω, Low-Voltage, Single-Supply
SPDT Analog Switches
(V+ = +5V ±10%, GND = 0, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted.) (Notes 2, 3)
PARAMETER
Charge Injection
SYMBOL
COM On-Capacitance
TYP
MAX
UNITS
pC
RL = 50Ω, CL = 5pF, f = 1MHz, TA = +25°C,
Figure 5
-57
dB
RL = 50Ω, CL = 5pF, f = 1MHz, TA = +25°C,
Figure 5
-57
dB
COFF
f = 1MHz, TA = +25°C, Figure 6
32
pF
CCOM(ON)
f = 1MHz, TA = +25°C, Figure 6
100
pF
OIRR
Crosstalk (Note 8)
NC or NO Off-Capacitance
MIN
65
Q
Off-Isolation (Note 7)
CONDITIONS
CL = 1.0nF, VGEN = 0, RGEN = 0, TA = +25°C,
Figure 4
LOGIC INPUT
Input Voltage Low
VINL
0.8
V
Input Voltage High
VINH
2.4
Logic Input Current
IIN
-1
1
µA
1.8
5.5
V
10
µA
MAX
UNITS
V+
V
V
SUPPLY
Power-Supply Range
V+
Positive Supply Current
I+
V+ = 5.5V, VIN = 0 or V+
ELECTRICAL CHARACTERISTICS—Single +3V Supply
(V+ = +2.7V to +3.6V, GND = 0, VINH = 2.0V, VINL = 0.6V, TA = TMIN to TMAX, unless otherwise noted.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
ANALOG SWITCH
Analog Signal Range
On-Resistance
VCOM, VNO,
VNC
RON
On-Resistance Flatness
(Note 6)
RFLAT(ON)
0
V+ = 2.7V,
VNO or VNC = 1.5V,
ICOM = 100mA
TA = +25°C
1.2
TA = TMIN to TMAX
2.0
2.5
V+ = 2.7V; ICOM = 100mA; VNO or VNC = 0,
0.75V, 1.5V; TA = +25°C
Ω
Ω
0.25
DYNAMIC
Turn-On Time
tON
VNO or VNC = 1.5V,
Figure 2
TA = +25°C
Turn-Off Time
tOFF
VNO or VNC = 1.5V,
Figure 2
TA = +25°C
Break-Before-Make Time
Delay (Note 4)
tBBM
MAX4624 only, Figure 3a
1
40
ns
Make-Before-Break Time
Delay (Note 4)
tMBB
MAX4625 only, Figure 3b
1
8
ns
40
pC
Charge Injection
Q
65
TA = TMIN to TMAX
100
62
TA = TMIN to TMAX
CL = 1.0nF, Figure 4, VGEN = 0,
RGEN = 0, TA = +25°C
80
80
100
ns
ns
_______________________________________________________________________________________
3
MAX4624/MAX4625
ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)
ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued)
(V+ = +2.7V to +3.6V, GND = 0, VINH = 2.0V, VINL = 0.6V, TA = TMIN to TMAX, unless otherwise noted.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
0.6
V
1
µA
10
µA
LOGIC INPUT
Input Voltage Low
VINL
Input Voltage High
VINH
2.0
Logic Input Current
IIN
-1
V
SUPPLY
Positive Supply Current
I+
V+ = 3.6V, VIN = 0 or V+
Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value is a maximum, is used in
this data sheet.
Note 3: SOT-packaged parts are 100% tested at +25°C. Limits across the full temperature range are guaranteed by design and
correlation.
Note 4: ∆RON = RON(MAX) - RON(MIN).
Note 5: Flatness is defined as the difference between the maximum and minimum values of on-resistance as measured over the
specified analog signal range.
Note 6: Guaranteed by design.
Note 7: Off-Isolation = 20log10 [VCOM / (VNC or VNO)], VCOM = output, VNC or VNO = input to off switch.
Note 8: Between the two switches.
__________________________________________Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
ON-RESISTANCE vs. COM VOLTAGE
OVER SUPPLY VOLTAGE
+1.8V
T = +105°C
TA = +85°C A
TA = +25°C
120
MAX4624 toc03
1.00
MAX4624 toc02
VCOM = 100mA
5
TURN-ON/OFF TIMES
vs. SUPPLY VOLTAGE
ON-RESISTANCE vs. COM VOLTAGE
OVER TEMPERATURE
MAX4624 toc01
6
100
0.75
RON (Ω)
+2.0V
3
1
+5V
1
2
60
tON
40
tOFF
20
V+ = 5V
ICOM = 100mA
0
0
0
80
0.25
0
3
VCOM (V)
4
0.50
TA = -40°C
TA = -55°C
+2.3V
+2.5V
+3.0V
2
tON/tOFF (ns)
4
RON (Ω)
MAX4624/MAX4625
1Ω, Low-Voltage, Single-Supply
SPDT Analog Switches
4
5
0
1
2
VCOM (V)
3
4
5
2
3
4
VSUPPLY (V)
_______________________________________________________________________________________
5
6
1Ω, Low-Voltage, Single-Supply
SPDT Analog Switches
ON/OFF-LEAKAGE CURRENT
vs. TEMPERATURE
tON
20
50
MAX4625
1
0
Q (pC)
ON/OFF-LEAKAGE (nA)
30
0.1
MAX4624
-50
-100
0.01
10
-150
tOFF
0.001
0
0
20
40
60
-200
-40
80
-20
0
20
40
60
80
100
0
10
2.5
-30
-20
-40
-30
OFF-ISOLATION
-50
-40
-60
-50
-70
-60
V+ = 5V
50Ω = IN/OUT
-90
1M
10M
PHASE (degrees)
-10
LOGIC THRESHOLD VOLTAGE (V)
-0
ON-PHASE
-80
2.0
5
VIN RISING
1.5
VIN FALLING
1.0
0.5
-70
-80
100M
0
2
3
4
5
FREQUENCY (Hz)
SUPPLY VOLTAGE (V)
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
OVERCURRENT RESPONSE
MAX4624 toc09
0.1
4
MAX4624 toc08
ON-LOSS
-10
3
LOGIC THRESHOLD VOLTAGE
vs. SUPPLY VOLTAGE
MAX4624 toc07
0
30k 100k
2
VCOM (V)
FREQUENCY RESPONSE
-20
1
TEMPERATURE (°C)
TEMPERATURE (°C)
6
MAX4624 toc10
-20
LOSS (dB)
-40
3.3V
0
THD (%)
tON/tOFF (ns)
40
100
MAX4624TOC5
V+ = 5V
VNO or VNC = 3V
CHARGE INJECTION vs. COM VOLTAGE
10
MAX4624TOC4
50
MAX4624 toc06
TURN-ON/OFF TIMES vs. TEMPERATURE
VCOM
2V/div
0.01
1.5A
ICOM
1A/div
0
0.001
10
100
1k
10k
100k
1ms/div
FRQUENCY (Hz)
_______________________________________________________________________________________
5
MAX4624/MAX4625
_____________________________Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
MAX4624/MAX4625
1Ω, Low-Voltage, Single-Supply
SPDT Analog Switches
Pin Description
PIN
NAME
FUNCTION
1
IN
Digital Control Input
2
V+
Positive Supply Voltage Input
3
GND
4
NC
5
COM
6
NO
Ground
Analog Switch—Normally Closed
Analog Switch—Common
Analog Switch—Normally Open
Detailed Description
The MAX4624/MAX4625 are low-on-resistance (RON),
low-voltage, single-pole/double-throw (SPDT) analog
switches that operate from a +1.8V to +5.5V supply.
The MAX4624 has break-before-make switching, and
the MAX4625 has make-before-break switching. These
devices also have fast switching speeds (tON = 50ns
max, tOFF = 50ns max).
When powered from a +5V supply, their 1Ω max RON
allows high continuous currents to be switched in a
variety of applications. In an overcurrent condition,
these switches provide both current-limit and thermalshutdown protection.
Current-Limit Protection
The MAX4624/MAX4625 feature current-limit protection
circuitry. When the voltage drop across the on switch
reaches 0.6V typ, the internal circuitry activates. The
current limit is not instantaneous, but rather integrates
POSITIVE SUPPLY
D1
V+
MAX4624
MAX4625
NO
COM
Vg
GND
D2
Figure 1. Overvoltage Protection Using Two External Blocking
Diodes
6
over time, so current limiting will not activate when the
switch output charges a small 0.1µF capacitor. For sustained overload conditions, the switch turns off (opens).
The switch turns on after 5ms. If the overload persists,
the switch cycles off and on to produce a pulsed output. A direct short circuit will be detected immediately,
and the switch will pulse on for 1µs, then remain off for
5ms.
Applications Information
Logic Inputs
The MAX4624/MAX4625 logic inputs can be driven up
to +5.5V regardless of the supply voltage. For example,
with a +3.3V supply, IN may be driven low to 0V and
high to 5.5V. Driving IN Rail-to-Rail® minimizes power
consumption.
Analog Signal Levels
Analog signals that range over the entire supply voltage
(V+ to GND) can be passed with very little change in
on-resistance (see Typical Operating Characteristics).
The switches are bidirectional, so the NO, NC, and
COM pins can be used as either inputs or outputs.
Power-Supply Sequencing and
Overvoltage Protection
Caution: Do not exceed the absolute maximum ratings because stresses beyond the listed ratings
may cause permanent damage to the devices.
Proper power-supply sequencing is recommended for
all CMOS devices. Always apply V+ before applying
analog signals, especially if the analog signal is not
current limited. If this sequencing is not possible, and if
the analog inputs are not current limited to <20mA, add
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
_______________________________________________________________________________________
1Ω, Low-Voltage, Single-Supply
SPDT Analog Switches
Protection diodes D1 and D2 also protect against some
overvoltage situations. With Figure 1’s circuit, if the supply voltage is below the absolute maximum rating, and
if a fault voltage up to the absolute maximum rating is
applied to an analog signal pin, no damage will result.
Test Circuits/Timing Diagrams
MAX4624
MAX4625
V+
V+
COM
NO
OR NC
VIN_
LOGIC
INPUT
50%
VINL
VOUT
RL
50Ω
CL
35pF
t OFF
IN
VOUT
GND
LOGIC
INPUT
SWITCH
OUTPUT
0.9 · V0UT
0.9 · VOUT
0V
t ON
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
RL
VOUT = VN_
RL + RON
(
t r < 5ns
t f < 5ns
VINH
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
)
Figure 2. Switching Time
V+
MAX4624
LOGIC
INPUT
V+
VN_
NC
50%
VINL
VOUT
COM
VINH
NO
RL
50Ω
IN
LOGIC
INPUT
CL
35pF
GND
0.9 · VOUT
VOUT
tD
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
Figure 3a. Break-Before-Make Interval (MAX4624 only)
_______________________________________________________________________________________
7
MAX4624/MAX4625
a small-signal diode (D1) as shown in Figure 1. If the
analog signal can dip below GND, add D2. Adding
protection diodes reduces the analog range to a diode
drop (about 0.7V) below V+ (for D1), and a diode drop
above ground (for D2). On-resistance increases slightly
at low supply voltages. Maximum supply voltage (V+)
must not exceed +6V.
Adding protection diode D2 causes the logic threshold
to be shifted relative to GND. TTL compatibility is not
guaranteed when D2 is added.
MAX4624/MAX4625
1Ω, Low-Voltage, Single-Supply
SPDT Analog Switches
V+
MAX4625
NC
VCOM
VINL
VNC
NO
VNC
0.8 • VOUT
VNO
RL
50Ω
LOGIC
INPUT
VINH
LOGIC
INPUT
V+
CL
35pF
RL
50Ω
CL
35pF
0.8 • VOUT
GND
VNQ
tMBB
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
Figure 3b. Make-Before-Break Interval (MAX4625 only)
V+
MAX4624
MAX4625
∆VOUT
V+
RGEN
VOUT
COM
NC
OR NO
VOUT
IN
OFF
CL
V GEN
GND
OFF
ON
IN
IN
VINL TO VINH
ON
OFF
OFF
Q = (∆V OUT )(C L )
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 4. Charge Injection
+5V 10nF
V
OFF-ISOLATION = 20log OUT
VIN
NETWORK
ANALYZER
0V OR V+
IN
NC
V+
COM
MAX4624
MAX4625
NO
50Ω
GND
50Ω
VIN
VOUT
V
ON-LOSS = 20log OUT
VIN
50Ω
MEAS
50Ω
REF
V
CROSSTALK = 20log OUT
VIN
50Ω
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" NO_ OR NC_ TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN COM_ AND "ON" NO_ OR NC_TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO ALL OTHER CHANNELS.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
Figure 5. On-Loss, Off-Isolation, and Crosstalk
8
_______________________________________________________________________________________
1Ω, Low-Voltage, Single-Supply
SPDT Analog Switches
TRANSISTOR COUNT: 186
V+
10nF
V+
COM
MAX4624
MAX4625
IN
CAPACITANCE
METER
f = 1MHz
NC or
NO
VINL
OR
VINH
GND
Figure 6. Channel Off/On-Capacitance
_______________________________________________________________________________________
9
MAX4624/MAX4625
Chip Information
1Ω, Low-Voltage, Single-Supply
SPDT Analog Switches
6LSOT.EPS
MAX4624/MAX4625
Package Information
10
______________________________________________________________________________________
1Ω, Low-Voltage, Single-Supply
SPDT Analog Switches
MAX4624/MAX4625
NOTES
______________________________________________________________________________________
11
MAX4624/MAX4625
1Ω, Low-Voltage, Single-Supply
SPDT Analog Switches
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.
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© 2000 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.