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19-1977; Rev 3; 2/03
0.5
Ω
/0.8
Ω
Low-Voltage, Dual SPDT
Analog Switches in UCSP
MAX4684/MAX4685
General Description
The MAX4684/MAX4685 low on-resistance (R
ON
), low-
voltage, dual single-pole/double-throw (SPDT) analog
switches operate from a single +1.8V to +5.5V supply.
The MAX4684 features a 0.5Ω (max) R
ON
for its NC
switch and a 0.8Ω (max) R
ON
for its NO switch at a
+2.7V supply. The MAX4685 features a 0.8Ω max on-
resistance for both NO and NC switches at a +2.7V
supply.
Both parts feature break-before-make switching action
(2ns) with t
ON
= 50ns and t
OFF
= 40ns at +3V. The digi-
tal logic inputs are 1.8V logic-compatible with a +2.7V to
+3.3V supply.
The MAX4684/MAX4685 are packaged in the chipscale
package (UCSP)™, significantly reducing the required
PC board area. The chip occupies only a 2.0mm
✕
1.50mm area. The 4
✕
3 array of solder bumps are
spaced with a 0.5mm bump pitch.
Features
♦
12-Bump, 0.5mm-Pitch UCSP
♦
NC Switch R
ON
0.5Ω max (+2.7V Supply) (MAX4684)
0.8Ω max (+2.7V Supply) (MAX4685)
♦
NO Switch R
ON
0.8Ω max (+2.7V Supply)
♦
R
ON
Match Between Channels
0.06Ω (max)
♦
R
ON
Flatness Over Signal Range
0.15Ω (max)
♦
+1.8V to +5.5V Single-Supply Operation
♦
Rail-to-Rail
®
Signal Handling
♦
1.8V Logic Compatibility
♦
Low Crosstalk: -68dB (100kHz)
♦
High Off-Isolation: -64dB (100kHz)
♦
THD: 0.03%
♦
50nA (max) Supply Current
♦
Low Leakage Currents
1nA (max) at T
A
= +25°C
________________________Applications
Speaker Headset Switching
MP3 Players
Power Routing
Battery-Operated Equipment
Relay Replacement
Audio and Video Signal Routing
Communications Circuits
PCMCIA Cards
Cellular Phones
Modems
UCSP is a trademark of Maxim Integrated Products, Inc.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
MAX4685ETB
MAX4685EUB
PART
MAX4684EBC
MAX4684ETB
MAX4684EUB
MAX4685EBC
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN/BUMP-
PACKAGE
12 UCSP*
10 Thin QFN
(3
✕
3)
10 µMAX
12 UCSP*
10 Thin QFN
(3
✕
3)
10 µMAX
TOP
MARK
AAF
AAG
—
AAG
AAH
—
Note:
Requires special solder temperature profile describing
the Absolute Maximum Ratings section.
*UCSP reliability is integrally linked to the user’s assembly
methods, circuit board material, and environment. Refer to the
UCSP Reliability Notice in the UCSP Reliability section of this
data sheet for more information.
Pin Configurations/Functional Diagrams/Truth Table
TOP VIEW
MAX4684/MAX4685
GND
NC1
IN1
COM1
NO1
C1
C2
C3
B1
A1
A2
A3
NC2
IN2
MAX4684/MAX4685
COM2
NO2
IN_
0
C4
B4
V+
UCSP
A4
1
NO_
OFF
ON
NC_
ON
OFF
IN1
4
NC1
5
µMAX
7
6
NC2
GND
V+
1
NO1
2
COM1
3
MAX4684/MAX4685
10
NO2
9
8
COM2
IN2
Continued at end of data sheet.
SWITCHES SHOWN FOR LOGIC "0" INPUT
________________________________________________________________
Maxim Integrated Products
1
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.
0.5
Ω
/0.8
Ω
Low-Voltage, Dual SPDT
Analog Switches in UCSP
MAX4684/MAX4685
ABSOLUTE MAXIMUM RATINGS
(All Voltages Referenced to GND)
V+, IN_......................................................................-0.3V to +6V
COM_, NO_, NC_ (Note1) ........................... -0.3V to (V+ + 0.3V)
Continuous Current NO_, NC_, COM_ .......................... ±300mA
Peak Current NO_, NC_, COM_
(pulsed at 1ms, 50% duty cycle).................................±400mA
Peak Current NO_, NC_, COM_
(pulsed at 1ms, 10% duty cycle).................................±500mA
Continuous Power Dissipation (T
A
= +70°C)
12-Bump UCSP (derate 11.4mW/°C above +70°C) ...909mW
10-Pin µMAX (derate 5.6mW/°C above +70°C) ..........444mW
Operating Temperature Ranges..........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Bump Temperature (soldering) (Note 2)
Infared (15s)................................................................+220°C
Vapor Phase (60s) ......................................................+215°C
Note 1:
Signals on NO_, NC_, and COM_ exceeding V+ or GND are clamped by internal diodes. Limit forward-diode current to
maximum current rating.
Note 2:
This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device
can be exposed to during board level solder attach and rework. This limit permits only the use of the solder profiles recom-
mended in the industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and Convection reflow. Pre-
heating is required. Hand or wave soldering is not allowed.
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—+3V SUPPLY
(V+ = +2.7V to +3.3V, V
IH
= +1.4V, V
IL
= +0.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at +3V and +25°C.)
(Notes 3, 9, 10)
PARAMETER
ANALOG SWITCH
Analog Signal Range
V
NO
_, V
NC
_,
V
COM
_
MAX4684
NC_ On-Resistance
(Note 4)
R
ON(NC)
V+ = 2.7V; I
COM
_ = 100mA;
V
NC
_ = 0 to V+
MAX4685
E
+25°C
E
+25°C
E
+25°C
E
+25°C
E
MAX4684
MAX4685
E
E
E
+25°C
E
+25°C
E
+25°C
E
-1
-10
-2
-20
30
0.45
0.45
0
0.3
V+
0.5
0.5
0.8
0.8
0.8
0.8
0.06
0.06
0.15
0.35
0.35
1
10
2
20
50
60
nA
Ω
Ω
Ω
Ω
V
SYMBOL
CONDITIONS
T
A
MIN
TYP
MAX
UNITS
NO_ On-Resistance
(Note 4)
On-Resistance Match
Between Channels
(Notes 4, 5)
NC_ On-Resistance
Flatness (Note 6)
NO_ On-Resistance
Flatness (Note 6)
NO_ or NC_ Off-
Leakage Current
(Note 7)
COM_ On-Leakage
Current (Note 7)
R
ON(NO)
V+ = 2.7V; I
COM
_ = 100mA;
V
NO
_ = 0 to V+
V+ = 2.7V; I
COM
_ = 100mA;
V
NO
_ or V
NC
_ = 1.5V
V+ = 2.7V; I
COM
= 100mA;
V
NC
_ = 0 to V+
V+ = 2.7V; I
COM
= 100mA;
V
NO
_ = 0 to V+
V+ = 3.3V; V
NO
_ or V
NC
_ = 3V, 0.3V;
V
COM
_ = 0.3V, 3V
V+ = 3.3V; V
NO
_ or V
NC
_ = 3V, 0.3V, or
floating; V
COM
_ = 3V, 0.3V, or floating
V+ = 2.7V, V
NO
_ or V
NC
_ = 1.5V;
R
L
= 50Ω; C
L
= 35pF; Figure 2
∆R
ON
Ω
R
FLAT (NC)
R
FLAT (NO)
I
NO
_(OFF) or
I
NC
_(OFF)
I
COM
_(ON)
nA
DYNAMIC CHARACTERISTICS
Turn-On Time
t
ON
ns
2
_______________________________________________________________________________________
0.5
Ω
/0.8
Ω
Low-Voltage, Dual SPDT
Analog Switches in UCSP
ELECTRICAL CHARACTERISTICS—+3V SUPPLY (continued)
(V+ = +2.7V to +3.3V, V
IH
= +1.4V, V
IL
= +0.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at +3V and +25°C.)
(Notes 3, 9, 10)
PARAMETER
Turn-Off Time
Break-Before-Make
Delay
Charge Injection
Off-Isolation (Note 8)
Crosstalk
Total Harmonic
Distortion
NC_ Off-Capacitance
NO_ Off-Capacitance
NC_ On-Capacitance
NO_ On-Capacitance
DIGITAL I/O
Input Logic High
Input Logic Low
IN_ Input Leakage
Current
POWER SUPPLY
Power-Supply Range
Supply Current (Note 4)
SYMBOL
t
OFF
t
BBM
Q
V
ISO
V
CT
THD
C
NC_(OFF)
C
NO_(OFF)
C
NC_(ON)
C
NO_(ON)
V
IH
V
IL
I
IN
_
V+
I+
V+ = 5.5V; V
IN
_ = 0 or V+
V
IN
_ = 0 or V+
CONDITIONS
V+ = 2.7V, V
NO
_ or V
NC
_ = 1.5V;
R
L
= 50Ω; C
L
= 35pF; Figure 2
V+ = 2.7V, V
NO
_, or V
NC
_ = 1.5V;
R
L
= 50Ω; C
L
= 35pF; Figure 3
COM_ = 0; R
S
= 0; C
L
= 1nF; Figure 4
C
L
= 5pF; R
L
= 50Ω; f = 100kHz;
V
COM
_ = 1V
RMS
; Figure 5
C
L
= 5pF; R
L
= 50Ω; f = 100kHz;
V
COM
_ = 1V
RMS
; Figure 5
R
L
= 600Ω, IN_ = 2Vp-p, f = 20Hz to
20kHz
f = 1MHz; Figure 6
f = 1MHz; Figure 6
f = 1MHz; Figure 6
f = 1MHz; Figure 6
T
A
+25°C
E
E
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
E
E
E
E
+25°C
E
-1
1.8
-50
-200
1.4
0.5
1
5.5
50
200
2
15
200
-64
-68
0.03
84
37
190
150
MIN
TYP
25
MAX
30
40
UNITS
ns
ns
pC
dB
dB
%
pF
pF
pF
pF
V
V
µA
V
nA
MAX4684/MAX4685
0.04
The algebraic convention used in this data sheet is where the most negative value is a minimum and the most positive
value a maximum.
Note 4:
Guaranteed by design.
Note 5:
∆R
ON
= R
ON(MAX)
- R
ON(MIN)
, between NC1 and NC2 or between NO1 and NO2.
Note 6:
Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal ranges.
Note 7:
Leakage parameters are 100% tested at T
A
= +85°C, and guaranteed by correlation over rated temperature range.
Note 8:
Off-isolation = 20log
10
(V
COM
/ V
NO
), V
COM
= output, V
NO
= input to off switch.
Note 9:
UCSP and QFN parts are 100% tested at +25°C only and guaranteed by design and correlation at the full hot-rated
temperature.
Note 10:
-40°C specifications are guaranteed by design.
Note 3:
_______________________________________________________________________________________
3
0.5
Ω
/0.8
Ω
Low-Voltage, Dual SPDT
Analog Switches in UCSP
MAX4684/MAX4685
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
MAX4684
NC ON-RESISTANCE vs. COM VOLTAGE
MAX4684/5 toc01
MAX4685
NC ON-RESISTANCE vs. COM VOLTAGE
MAX4684/5 toc02
NO ON-RESISTANCE vs. COM VOLTAGE
V+ = +1.8V
2.0
V+ = +2.0V
MAX4684/5 toc03
1.8
1.6
1.4
1.2
R
ON
(Ω)
V+ = +1.8V
2.0
1.8
1.6
1.4
R
ON
(Ω)
1.2
1.0
0.8
0.6
0.4
0.2
0
V+ = +2.3V
V+ = +2.5V
V+ = +3.0V
V+ = +5.0V
V+ = +2.0V
V+ = +1.8V
2.5
1.0
0.8
0.6
0.4
0.2
0
0
1
V+ = +2.0V
V+ = +2.3V
V+ = +5.0V
R
ON
(Ω)
1.5
1.0
V+ = +2.3V
V+ = +2.5V
V+ = +3.0V
V+ = +5.0V
V+ = +2.5V
V+ = +3.0V
0.5
0
0
1
2
3
V
COM
(V)
4
5
0
1
2
3
V
COM
(V)
4
5
2
3
4
5
V
COM
(V)
MAX4684
NC ON-RESISTANCE vs. COM VOLTAGE
MAX4684/5 toc04
MAX4685
NC ON-RESISTANCE vs. COM VOLTAGE
MAX4684/5 toc05
NO ON-RESISTANCE vs. COM VOLTAGE
V+ = +5V
0.35
0.30
MAX4684/5 toc06
0.28
0.26
0.24
0.22
R
ON
(Ω)
0.20
0.18
0.16
0.14
0.12
0.10
0
1
2
3
4
5
V
COM
(V)
T
A
= -40°C
T
A
= +85°C
V+ = +5V
0.45
V+ = +5V
0.40
0.35
R
ON
(Ω)
0.40
T
A
= +25°C
R
ON
(Ω)
0.30
0.25
0.20
0.15
0.10
0
1
T
A
= +25°C
T
A
= +85°C
T
A
= +85°C
0.25
0.20
T
A
= +25°C
0.15
T
A
= -40°C
0.10
2
3
4
5
0
1
2
3
T
A
= -40°C
4
5
V
COM
(V)
V
COM
(V)
MAX4684
NC ON-RESISTANCE vs. COM VOLTAGE
MAX4684/5 toc07
MAX4684
NC ON-RESISTANCE vs. COM VOLTAGE
MAX4684/5 toc01
NO ON-RESISTANCE vs. COM VOLTAGE
V+ = +3V
0.45
0.40
R
ON
(Ω)
0.35
0.30
0.25
0.20
0.15
0.10
T
A
= +25°C
T
A
= -40°C
T
A
= +85°C
MAX4684/5 toc09
0.35
V+ = +3V
0.30
T
A
= +25°C
R
ON
(Ω)
T
A
= +85°C
1.8
1.6
1.4
1.2
R
ON
(Ω)
1.0
0.8
0.6
V+ = +2.0V
V+ = +2.3V
V+ = +2.5V
V+ = +3.0V
V+ = +5.0V
V+ = +1.8V
0.50
0.25
0.20
0.15
T
A
= -40°C
0.4
0.2
0.10
0
0.5
1.0
1.5
V
COM
(V)
2.0
2.5
3.0
0
0
1
2
3
4
5
V
COM
(V)
0
0.5
1.0
1.5
V
COM
(V)
2.0
2.5
3.0
4
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