19-3854; Rev 0; 2/06
Quad-SPDT, Clickless Audio Switches
with Negative Signal Handling
General Description
The MAX4910/MAX4911/MAX4912 quad, single-
pole/double-throw (SPDT), clickless audio switches fea-
ture negative signal capability that allows signals as low
as V -5.5V to pass through without distortion. These
CC
analog switches have a low on-resistance, low supply
current, and operate from a single +1.8V to +5.5V supply.
Features
♦ Distortion-Free Negative Signal Throughput Down
to V
- 5.5V
CC
♦ Internal Shunt Resistors Reduce Click-and-Pop
Sounds
♦ High PSRR Reduces Supply Noise
♦ Low On-Resistance (0.37Ω)
♦ 0.1Ω Channel-to-Channel Matching
♦ 0.35Ω On-Resistance Flatness
♦ +1.8V to +5.5V Single-Supply Voltage
♦ -80dB Crosstalk (20kHz)
The MAX4910/MAX4911/MAX4912 have internal shunt
resistors that automatically discharge the capacitance at
the normally open (NO) and normally closed (NC) termi-
nals when they are not connected. The MAX4910/
MAX4911 have shunt resistors on all NO and NC terminals
and the MAX4912 has shunt resistors on all NO, NC1, and
NC3 terminals. These shunt resistors reduce click-and-
pop sounds that occur when switching audio signals
between precharged points. A break-before-make feature
further reduces popping.
♦ -90dB Off-Isolation (20kHz)
♦ 0.05% Total Harmonic Distortion
♦ Enable Control (MAX4911)
♦ 10nA Leakage Current
The MAX4910/MAX4912 control the switches in pairs with
two control bits CB1 and CB2. The MAX4911 has one con-
trol bit to switch all four switches and an enable pin EN to
put the switches in a high-impedance mode. The MAX4912
has two terminals without shunt resistors for switching
applications that do not require pre-discharge switching.
♦ 150nA Supply Current
Ordering Information
PIN-
PACKAGE
TOP
PKG
PART
TEMP RANGE
The MAX4910/MAX4911/MAX4912 are available in a tiny
16-pin TQFN-EP (3mm x 3mm) package and operate
over the -40°C to +85°C extended temperature range.
MARK CODE
MAX4910ETE+ -40°C to +85°C 16 TQFN-EP** ADY T1633-4
MAX4911ETE+* -40°C to +85°C 16 TQFN-EP** ADZ T1633-4
MAX4912ETE+* -40°C to +85°C 16 TQFN-EP** AEA T1633-4
Applications
Cell Phones
+ Denotes lead-free package.
*Future product—contact factory for availability.
**EP = Exposed pad.
PDAs and Handheld Devices
Notebook Computers
MP3 Players
Typical Operating Circuit appears at end of data sheet.
Pin Configurations
TOP VIEW
COM4 NO4 CB2 NC3
COM4 NO4
12 11
EN
10
NC3
9
12
11
10
9
COM3
NO3
COM3
NO3
13
14
13
14
NC4
8
7
6
5
NC4
8
7
6
5
V
CC
V
CC
MAX4910
MAX4912
MAX4911
GND
NC2
GND
NC2
NO1 15
16
NO1 15
16
COM1
COM1
+
+
1
2
3
4
1
2
3
4
NC1 CB1 NO2 COM2
NC1
CB
NO2 COM2
THIN QFN
3 mm x 3 mm
THIN QFN
3 mm x 3 mm
________________________________________________________________ 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.