The MAX4699/MAX4701/MAX4702 are low-voltage,
single-supply CMOS analog switches. The MAX4699/
MAX4701 are dual double-pole/double-throw (DPDT)
switches with two control inputs that control two
single-pole/double-throw (SPDT) switches each. The
MAX4702 is a quad SPDT switch with one control input
and one low-voltage digital logic power supply.
These devices operate from a single +1.8V to +5.5V
power supply. When powered from a +2.7V supply the
MAX4699/MAX4701/MAX4702 offer a 75Ω on-resistance (RON), with 12Ω max RONflatness and 4Ω max
matching between channels. Each switch has rail-to-rail
signal handling, fast switching speeds of t
ON
= 35ns,
t
OFF
= 20ns, and a maximum 1nA of leakage current.
The MAX4699/MAX4701 digital inputs are 1.8V-logic
compatible when operated from a +3V supply. The
MAX4702’s digital inputs feature a 1.0V threshold when
powered with a 1.5V logic supply.
The MAX4699 is available in a space-saving 16-lead
4mm x 4mm TQFN package. The MAX4701/MAX4702
are available in space-saving 16-lead 3mm x 3mm TQFN
16-pin TSSOP packages.
= 0V, VIH= +1.4V, VIL= +0.5V, (VL= +1.5V, VIH= +1.0V, VIL= +0.4V for MAX4702 only), TA= -40°C to
+85°C. Typical values are at V+ = +3V and T
A
= +25°C, unless otherwise noted.) (Notes 2, 3)
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.
(Voltages Referenced to GND)
V+............................................................................-0.3V to +6V
The MAX4699/MAX4701 are low-voltage CMOS analog
switches that operate from a single +1.8V to +5.5V
power supply. The MAX4702 requires an additional
logic supply that allows for setting lower logic thresholds. The MAX4699/MAX4701 are double-pole/doublethrow (DPDT) devices. The MAX4702 is a quad
single-pole/double-throw (SPDT) device. These devices
feature a break-before-make switching, fast switching
speeds (with V+ = 5V: tON= 18ns max, t
OFF
= 9ns max
and with V+ = 3V: tON= 35ns, t
OFF
= 20) and rail-to-rail
signal handling. A logic input on the MAX4702 allows
for logic thresholds as low as 1.0V.
Applications Information
Analog Signal Levels
Analog signals that range over the entire supply voltage
(V+ to GND) can be passed with very little change in onresistance (see
Typical Operating Characteristics
). The
switches are bidirectional, so the NO, NC, and COM pins
can be used as either inputs or outputs.
Figure 1. Overvoltage Protection Using Two External Blocking
Diodes
TQFN-EP PIN TS SOP PIN
MAX4699/
MAX4 701
1 1 3 3 NC1 Analog Switch 1—Normally Closed Terminal
— 2 — 4 IN Digital Control Input Switch 1, 2, 3, and 4
2 — 4 — IN1, IN2 Digital Control Input Switch 1 and 2
3 3 5 5 NO2 Analog Switch 2—Normall y Open Termina l
4 4 6 6 COM2 Analog Switch 2—Common Terminal
5 5 7 7 NC2 Analog Switch 2—Normally Closed Terminal
6 6 8 8 GND Ground
7 7 9 9 NO3 Analog Switch 3—Normall y Open Termina l
8 8 10 10 COM3 Analog Switch 3—Common Terminal
9 9 11 11 NC3 Analog Switch 3—Normally Clo sed Termina l
— 10 — 12 VL Logic Power-Supply Input
10 — 12 — IN3, IN4 Digital Control Input Switch 3 and 4
11 11 13 13 NO4 Analog Switch 4—Normally Open Terminal
12 12 14 14 COM4 Analog Switch 4—Common Terminal
13 13 15 15 NC4 Analog Switch 4—Normally Closed Terminal
14 14 16 16 V+ Posit ive Supply Voltage Input
15 15 1 1 NO1 Analog Switch 1—Norma ll y Open Termina l
16 16 2 2 COM1 Analog Switch 1—Common Terminal
— —— — EP Exposed Pad (TQFN Only). Connect EP to GND.
MAX4 702 MAX4701 MAX4702
NAME FUNCTION
POSITIVE SUPPLY
D1
V+
MAX4699
MAX4701
NO
V
g
GND
COM
D2
MAX4702
MAX4699/MAX4701/MAX4702
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 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.
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.
VLLogic Input (MAX4702)
The MAX4702 features a VLlogic input that allows for
lower logic input thresholds down to 1.0V min for VIHin
the quad SPDT configuration. Power-up V
L
after V+ has
been powered with a minimum of 1.5V to ensure proper
operation of the device.
Low-Voltage, Dual DPDT/Quad SPDT
Analog Switches in QFN
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
)(CL)
OUT
OFF-ISOLATION = 20log
ON-LOSS = 20log
CROSSTALK = 20log
OFF
OFF
V
OUT
V
IN
V
OUT
V
IN
V
OUT
V
IN
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.
10nF
COM_
V+
V+
MAX4699
MAX4701
MAX4702
CAPACITANCE
METER
f = 1MHz
NC_ or
NO_
GND
IN_
V
IL
OR
V
IH
MAX4699/MAX4701/MAX4702
Low-Voltage, Dual DPDT/Quad SPDT
Analog Switches in QFN
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
TOP VIEW
MAX4701
1
NO1V+
COM1
2
NC1
3
IN1, IN2
4
NO2
5
COM2
6
NC2
7
GND
8
TSSOPTSSOP
IN1,
IN3,
IN2
IN4
L—NC1–COM1, NC2–COM2
H—NO1–COM1, NO2–COM2
—LNC3–COM3, NC4–COM4
—HNO3–COM3, NO4–COM4
ON SWITCHES
16
15
14
13
12
11
10
9
NC4
COM4
NO4
1N3, IN4
NC3
COM3
NO3
NO1V+
COM1
NC1
IN
NO2
COM2
NC2
GND
SWITCHES SHOWN FOR
LOGIC “0” INPUTS
MAX4702
1
2
3
4
5
6
7
8
INON SWITCHES
NC1–COM1, NC2–COM2
L
NC3–COM3, NC4–COM4
NO1–COM1, NO2–COM2
H
NO3–COM3, NO4–COM4
16
15
NC4
14
COM4
13
NO4
V
12
L
NC3
11
COM3
10
NO3
9
MAX4699/MAX4701/MAX4702
Low-Voltage, Dual DPDT/Quad SPDT
Analog Switches in QFN
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 ____________________