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MAX4636EUB+T

P1-P3P4-P6P7-P9P10-P11
MAX4635/MAX4636
Fast, Low-Voltage, Dual 4Ω SPDT
CMOS Analog Switches
_______________________________________________________________________________________ 7
t
r
< 5ns
t
f
< 5ns
50%
0
V
IH
+ 0.5V
t
OFF
0
0.9
✕
V
0UT
0.9
✕
V
OUT
t
ON
V
OUT
SWITCH
OUTPUT
LOGIC
INPUT
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
MAX4635/MAX4636
LOGIC
INPUT
R
L
GND
C
L
INCLUDES FIXTURE AND STRAY CAPACITANCE.
NO_ or NC_
IN_
NC_ or NO_
V
OUT
V+
V+
C
L
V
IN
COM_
Figure 1a. Switching Time
50%
V
IH
+ 0.5V
0
LOGIC
INPUT
V
OUT
0.9
✕
V
OUT
t
D
MAX4635/MAX4636
LOGIC
INPUT
R
L
GND
C
L
INCLUDES FIXTURE AND STRAY CAPACITANCE.
NO_ or NC_
IN_
NC_ or NO_
V
OUT
V+
V+
C
L
V
IN
COM_
t
r
< 5ns
t
f
< 5ns
Figure 1b. Break-Before-Make Interval
V
GEN
GND
COM_
C
L
V
OUT
V+
V
OUT
IN
OFF
ON
OFF
∆V
OUT
Q = (∆V
OUT
)(C
L
)
NC_
OR NO_
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
OFF
ON
OFF
IN
V
INL
TO V
INH
V+
R
GEN
IN
MAX4635/MAX4636
Figure 2. Charge Injection
Detailed Description
The MAX4635/MAX4636 are low-on-resistance (R
ON
),
low-voltage, dual SPDT analog switches that operate
from a +1.8V to +5.5V supply. The MAX4635/MAX4636
feature very fast switching speed (t
ON
= 14ns max,
t
OFF
= 6ns max) and guaranteed break-before-make
switching. The low maximum R
ON
allows high continu-
ous currents to be switched in a variety of applications.
Applications Information
Logic Inputs
The MAX4635/MAX4636 logic inputs (IN1, IN2) can be
driven up to +5.5V, regardless of the voltage on V+.
This allows interfacing to 5V logic signals while operat-
ing with a +3.3V supply voltage without external level
translation.
Analog Signal Levels
Analog signals ranging 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 may be used as either inputs or outputs.
Power-Supply Sequencing and
Overvoltage Protection
Caution: Do not exceed the absolute maximum rat-
ings because stresses beyond the listed ratings can
cause permanent damage to the device. Proper
power-supply sequencing is recommended for all
CMOS devices. Always apply V+ before applying ana-
log 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 less than 30mA,
add a small-signal diode (D1) as shown in Figure 5. 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).
MAX4635/MAX4636
Fast, Low-Voltage, Dual 4Ω SPDT
CMOS Analog Switches
8 _______________________________________________________________________________________
CAPACITANCE
METER
NC_ OR
NO_
COM_
GND
IN_
V
INL
OR
V
INH
10nF
V+
f = 1MHz
V+
MAX4635
MAX4636
Figure 3. Channel Off/On-Capacitance
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.
+5V
V
OUT
V+
IN_
NC_
COM_
NO_
V
IN
MAX4635
MAX4636
OFF-ISOLATION = 20log
V
OUT
V
IN
ON-LOSS = 20log
V
OUT
V
IN
CROSSTALK = 20log
V
OUT
V
IN
NETWORK
ANALYZER
50Ω
50Ω 50Ω
50Ω
MEAS REF
10nF
0 OR V+
50Ω
GND
Figure 4. On-Loss, Off-Isolation, and Crosstalk
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. Protection diodes D1 and
D2 also protect against some overvoltage situations.
With Figure 5’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 results.
MAX4635/MAX4636
Fast, Low-Voltage, Dual 4Ω SPDT
CMOS Analog Switches
_______________________________________________________________________________________ 9
Figure 5. Overvoltage Protection Using Two External Blocking
Diodes
POSITIVE SUPPLY
COM_
NO_
D2
D1
GND
V
g
V+
MAX4635
MAX4636
Chip Information
TRANSISTOR COUNT: 239
PROCESS: CMOS
P1-P3P4-P6P7-P9P10-P11

MAX4636EUB+T

Mfr. #:
Buy MAX4636EUB+T
Manufacturer:
Maxim Integrated
Description:
Analog Switch ICs 4Ohm SPDT CMOS Analog Switch
Lifecycle:
New from this manufacturer.
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