Maxim MAX4627 0.5â ¦, low-voltage, single-supply spst analog switch Datasheet

19-1633; Rev 0; 1/00
0.5Ω, Low-Voltage, Single-Supply
SPST Analog Switches
Features
♦ Low RON
0.5Ω max (+5V Supply)
0.9Ω max (+3V Supply)
♦ 0.1Ω max RON Flatness (+5V Supply)
♦ Overcurrent Protection
♦ Single-Supply Operation (+1.8V to +5.5V)
♦ Available in SOT23 Packages
♦ Fast Switching: tON = 50ns max, tOFF = 30ns max
♦ TTL-Logic Compatible at +5V
♦ Pin Compatible with MAX4514 (MAX4626)
Pin Compatible with MAX4515 (MAX4627)
Applications
Ordering Information
Power Routing
Battery-Operated Equipment
PART
TEMP. RANGE
PINPACKAGE
TOP
MARK
MAX4626EUK-T
MAX4627EUK-T
MAX4628EUT-T
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
5 SOT23-5
5 SOT23-5
6 SOT23-6
ADMJ
ADMK
AADN
Audio and Video Signal Routing
Low-Voltage Data-Acquisition Systems
Communications Circuits
PCMCIA Cards
Cellular Phones
Modems
Hard Drives
Pin Configurations/Functional Diagrams/Truth Tables
TOP VIEW
MAX4627
MAX4626
COM 1
5
V+
COM 1
MAX4628
5
V+
NC 2
NO 2
GND 3
4
IN
GND
4
3
MAX4626
0
1
6
V+
NO 2
5
IN
GND 3
4
IN
SOT23-5
SOT23-5
LOGIC
IN
COM 1
SWITCH
OFF
ON
SOT23-6
MAX4627
LOGIC
0
1
MAX4628
SWITCH
IN
IN
SWITCH
ON
OFF
1
1
0
0
0
1
0
1
OFF
OFF
OFF
ON
SWITCHES SHOWN FOR LOGIC "0" INPUT.
________________________________________________________________ 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.
MAX4626/MAX4627/MAX4628
General Description
The MAX4626/MAX4627/MAX4628 are low-on-resistance, low-voltage, single-pole/single-throw (SPST)
analog switches that operate from a +1.8V to +5.5V single supply. The MAX4626 is normally open (NO), and
the MAX4627 is normally closed (NC). The MAX4628 is
normally open (NO) and has two control inputs. These
devices also have fast switching speeds (tON = 50ns
max, tOFF = 30ns max).
When powered from a +5V supply, the MAX4626/
MAX4627/MAX4628 offer 0.5Ω max on-resistance
(RON) with 0.1Ω max RON flatness, and their digital
logic inputs are TTL compatible. These switches also
feature overcurrent protection to prevent device damage from short circuits and excessive loads.
The MAX4626 is pin compatible with the MAX4514, and
the MAX4627 is pin compatible with the MAX4515. The
MAX4626/MAX4627 are available in SOT23-5 packages; the MAX4628 is available in a SOT23-6 package.
MAX4626/MAX4627/MAX4628
0.5Ω, Low-Voltage, Single-Supply
SPST Analog Switches
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to GND
V+, IN, IN..................................................................-0.3V to +6V
NO, NC, COM (Note 1).................................-0.3V to (V+ + 0.3V)
Continuous Current NO, NC to COM .............................±400mA
Peak Switch Current NO, NC to COM
(pulsed at 1ms, 10% duty cycle max) ........................ ±800mA
Continuous Power Dissipation (TA = 70°C)
5-Pin SOT23-5 (derate 7.1mW/°C above +70°C) ..........571mW
6-Pin SOT23-6 (derate 7.1mW/°C above +70°C) ..........571mW
Operating Temperature Range
MAX462_EU_ ....................................................-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, or 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
ANALOG SWITCH
Analog Signal Range
On-Resistance
SYMBOL
CONDITIONS
VCOM, VNO,
VNC
RON
TYP
0
V+ = 4.5V,
VNO or VNC = 3.5V,
ICOM = 100mA
TA = +25°C
TA = +25°C
TA = TMIN to TMAX
TA = +25°C
TA = TMIN to TMAX
TA = +25°C
TA = TMIN to TMAX
-2
-20
-2
-20
0.2
TA = +25°C
-4
0.3
TA = TMIN to TMAX
-40
On-Resistance Flatness
(Note 4)
RFLAT(ON)
V+ = 4.5V; VCOM = 0, 1V,
2V; ICOM = 100mA
NO or NC Off-Leakage
Current
INO(OFF),
INC(OFF)
V+ = 5.5V; VCOM = 1V, 4.5V;
VNO or VNC = 4.5V, 1V
COM Off-Leakage
Current
ICOM(OFF)
V+ = 5.5V; VCOM = 1V, 4.5V;
VNO or VNC = 4.5V, 1V
COM On-Leakage
Current
ICOM(ON)
V+ = 5.5V; VCOM = 1V, 4.5V;
VNO or VNC = 1V, 4.5V, or
floating
Overcurrent-Protection
Threshold Current
MIN
0.35
TA = TMIN to TMAX
MAX
UNITS
V+
V
0.5
0.6
0.05
0.2
0.10
0.10
2
20
2
20
Ω
Ω
nA
nA
4
nA
40
TA = +25°C
2.4
A
TA = +25°C
TA = TMIN to TMAX
TA = +25°C
VNO or VNC = 3V, Figure 2
TA = TMIN to TMAX
CL = 1.0nF, VGEN = 0, RGEN = 0, TA = +25°C, Figure 3
RL = 50Ω, CL = 5pF, f = 1MHz, TA = +25°C, Figure 4
f = 1MHz, TA = +25°C, Figure 5
40
40
-51
65
pC
dB
pF
COFF
f = 1MHz, TA = +25°C, Figure 5
65
pF
CCOM(ON)
f = 1MHz, TA = +25°C, Figure 5
130
pF
DYNAMIC
Turn-On Time
tON
Turn-Off Time
tOFF
Charge Injection
Off-Isolation (Note 5)
COM Off-Capacitance
Q
OIRR
NC or NO OffCapacitance
COM On-Capacitance
2
CCOM(OFF)
VNO or VNC = 3V, Figure 2
18
_______________________________________________________________________________________
50
60
30
40
ns
ns
0.5Ω, Low-Voltage, Single-Supply
SPST Analog Switches
(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
0.8
V
µA
LOGIC INPUT
Input Voltage Low
VINL
Input Voltage High
VINH
2.4
Logic Input Current
IIN
-1
1
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 4)
RFLAT(ON)
0
V+ = 2.7V,
VNO or VNC = 1.5V,
ICOM = 100mA
TA = +25°C
0.4
TA = TMIN to TMAX
0.8
0.9
V+ = 2.7V; ICOM = 100mA;
VNO or VNC = 0, 0.75V, 1.5V; TA = +25°C
Ω
Ω
0.1
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
Charge Injection
Q
65
TA = TMIN to TMAX
80
90
22
TA = TMIN to TMAX
40
50
CL = 1.0nF, Figure 3, VGEN = 0, RGEN = 0,
Ta = +25°C
ns
ns
pC
30
LOGIC INPUT
Input Voltage Low
VINL
Input Voltage High
VINH
2.0
0.6
Logic Input Current
IIN
-1
V
V
1
µA
10
µA
SUPPLY
Positive Supply Current
I+
V = +3.6V, VIN = 0
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: SOT-packaged parts are 100% tested at +25°C. Limits across the full temperature range are guaranteed by design and
correlation.
Note 4: Flatness is defined as the difference between the maximum and minimum values of on-resistance as measured over the
specified analog signal range.
Note 5: Off-Isolation = 20log10 [VCOM / (VNC or VNO)], VCOM = output, VNC or VNO = input to off switch.
_______________________________________________________________________________________
3
MAX4626/MAX4627/MAX4628
ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
ON-RESISTANCE vs. COM VOLTAGE
OVER SUPPLY VOLTAGE
ON-RESISTANCE vs. COM VOLTAGE
OVER TEMPERATURE
0.5
TA = +105°C
1.5
1.0
0.5
TA = +85°C
0.3
TA = -40°C
TA = +25°C
0.2
VCC = +2.3V
VCC = +2.5V
VCC = +3.0V
VCC = +5V
50
tON/tOFF (ns)
RON(Ω)
VCC = +2.0V
60
40
0.4
2.0
RON(Ω)
V + = 5V
ICOM = 100mA
MAX4626/7/8-03
VCC = +1.8V
TURN-ON/OFF TIMES
vs. SUPPLY VOLTAGE
MAX4626/7/8-02
ICOM = 100mA
2.5
0.6
MAX4626/7/801
3.0
tON
30
20
TA = -55°C
0.1
10
0
0
tOFF
2
3
4
0
5
1
2
3
4
5
VCOM (V)
VCOM (V)
TURN-ON/OFF TIMES
vs. TEMPERATURE
ON/OFF-LEAKAGE CURRENT
vs. TEMPERATURE
60
tON
40
4
5
6
CHARGE INJECTION vs. COM VOLTAGE
10
120
100
1
ON/OFF-LEAKAGE (nA)
80
3
VSUPPLY (V)
80
Q (pC)
V+ = 5V
VNO or VNC = 3V
2
MAX4626/7/805
100
1
MAX4626/7/8-04
0
MAX4626/7/8-06
0
tON/tOFF (ns)
0.1
60
40
0.01
20
20
tOFF
0.001
0
-40
-20
0
20
40
60
0
-40
80
-20
0
20
40
60
80
100
-20
-40
-30
OFF-ISOLATION
-40
-60
-50
-70
-60
V+ = 5V
50Ω = IN/OUT
1M
10M
FREQUENCY (Hz)
4
100M
PHASE (degrees)
-30
-90
MAX4626/7/8-08
2.5
10
-10
ON-PHASE
-80
3
0
ON-LOSS
LOGIC THRESHOLD VOLTAGE (V)
0
30k 100k
2
LOGIC THRESHOLD VOLTAGE
vs. SUPPLY VOLTAGE
MAX4626/7/8-07
-10
-50
1
VCOM (V)
FREQUENCY RESPONSE
-20
0
TEMPERATURE (°C)
TEMPERATURE (°C)
LOSS (dB)
MAX4626/MAX4627/MAX4628
0.5Ω, Low-Voltage, Single-Supply
SPST Analog Switches
2.0
VIN RISING
1.5
1.0
VIN FALLING
0.5
-70
-80
0
2
3
4
5
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
6
4
5
0.5Ω, Low-Voltage, Single-Supply
SPST Analog Switches
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
THD (%)
OVERCURRENT RESPONSE
0.01
3V
MAX4626/7/810
MAX4626/7/8-09
0.1
VCOM
2V/div
0
3A
ICOM
1A/div
0
0.001
10
100
1k
10k
100k
FREQUENCY (Hz)
500µs/div
Pin Description
PIN
NAME
FUNCTION
MAX4626
MAX4627
MAX4628
1
1
1
2
—
2
NO
3
3
3
GND
4
4
5
IN
Digital Control Input
5
5
6
V+
Positive Supply Input
—
2
—
NC
Analog Switch—Normally Closed
—
—
4
IN
Inverted Digital Control Input (see MAX4628 Truth Table)
COM
Analog Switch—Common
Analog Switch—Normally Open
Ground
_______________________________________________________________________________________
5
MAX4626/MAX4627/MAX4628
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
MAX4626/MAX4627/MAX4628
0.5Ω, Low-Voltage, Single-Supply
SPST Analog Switches
Detailed Description
Applications Information
The MAX4626/MAX4627/MAX4628 are low-on-resistance (R ON ), low-voltage, single-pole/single-throw
(SPST) analog switches that operate from a +1.8V to
+5.5V single supply. The MAX4626 is normally open
(NO), and the MAX4627 is normally closed (NC). The
MAX4628 is normally open (NO) and has two control
inputs.
The MAX4626/MAX4627/MAX4628 logic inputs can be
driven up to +5.5V regardless of the supply voltage. For
example, with a +3.3V supply, IN or IN may be driven
low to 0V and high to 5.5V. Driving IN or IN Rail-to-Rail®
minimizes power consumption.
When powered from a +5V supply, their 0.5Ω R ON
allows high continuous currents to be switched in a
variety of applications. In the event of an overcurrent
condition, these switches provide both current-limit and
thermal-shutdown protection.
Current-Limit Protection
The MAX4626/MAX4627/MAX4628 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 over time so that current limiting will not activate under momentary short-circuit conditions encountered when the switch output charges a small 0.1µF
capacitor. For sustained overcurrent conditions, the
switch turns off (opens). The switch turns on after 5ms
and, if the overload condition persists, the switch will
cycle 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.
POSITIVE SUPPLY
MAX4626
MAX4627
MAX4628
D1
V+
NO
COM
Logic Inputs
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; 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
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 by a
small amount at low supply voltages. Maximum supply
voltage (V+) must not exceed +6V.
Adding protection diode D2 causes the logic thresholds to be shifted relative to GND. TTL compatibility is
not guaranteed when protection diode D2 is added.
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.
Vg
GND
D2
Figure 1. Overvoltage Protection Using Two External Blocking
Diodes
6
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
_______________________________________________________________________________________
0.5Ω, Low-Voltage, Single-Supply
SPST Analog Switches
MAX4626
MAX4627
MAX4628
V+
V+
COM
NO
OR NC
VN_
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+
MAX4626
MAX4627
MAX4628
∆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 3. Charge Injection
+5V 10nF
V
OFF-ISOLATION = 20log OUT
VIN
NETWORK
ANALYZER
0V OR V+
V+
IN
50Ω
VIN
V
ON-LOSS = 20log OUT
VIN
50Ω
COM
MAX4626
MAX4627
MAX4628
NO
50Ω USE
ONLY FOR
ISOLATION
VOUT
MEAS
REF
GND
50Ω
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.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
Figure 4. On-Loss and Off-Isolation
_______________________________________________________________________________________
7
MAX4626/MAX4627/MAX4628
Test Circuits/Timing Diagrams
Chip Information
V+
10nF
MAX4626
MAX4627
MAX4628
V+
TRANSISTOR COUNT: 186
COM
IN
CAPACITANCE
METER
f = 1MHz
VINL OR
VINH
NC or
NO
GND
Figure 5. Channel Off/On-Capacitance
Package Information
SOT5L.EPS
MAX4626/MAX4627/MAX4628
0.5Ω, Low-Voltage, Single-Supply
SPST Analog Switches
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.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2000 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.