Rainbow Electronics MAX4912 - Manual

MAX4910/MAX4911/MAX4912
Quad-SPDT, Clickless Audio Switches
with Negative Signal Handling
________________________________________________________________ Maxim Integrated Products 1
19-3854; Rev 0; 2/06
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.
15
16
14
13
5
6
7
8
COM4 NO4 EN NC3
NC1 CB NO2 COM2
1 3
V CC
4
12 10 9
NO1
COM1
COM3
NO3
GND
NC2
MAX4911
2
11
NC4
THIN QFN
3 mm x 3 mm
+
15
16
14
13
5
6
7
8
COM4 NO4 CB2 NC3
NC1 CB1 NO2 COM2
1 3
V CC
4
12 10 9
NO1
COM1
COM3
NO3
GND
NC2
MAX4910
MAX4912
2
11
NC4
THIN QFN
3 mm x 3 mm
TOP VIEW
+
Pin Configurations
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
CC
-5.5V to pass through without distortion. These
analog switches have a low on-resistance, low supply
current, and operate from a single +1.8V to +5.5V supply.
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.
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.
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.
Applications
Cell Phones
PDAs and Handheld Devices
Notebook Computers
MP3 Players
Features
♦ Distortion-Free Negative Signal Throughput Down
to V CC - 5.5V
♦ 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)
♦ -90dB Off-Isolation (20kHz)
♦ 0.05% Total Harmonic Distortion
♦ Enable Control (MAX4911)
♦ 10nA Leakage Current
♦ 150nA Supply Current
Ordering Information
PA RT T EM P R AN G E
PIN-
PA CK A G E T O P
M A RK
PK G
C O DE
M A X4 9 1 0E TE+ - 40°C to + 85°C 16 TQFN- E P ** AD Y T1633- 4
M A X4 9 1 1E TE+ * - 40°C to + 85°C 16 TQFN- E P ** AD Z T1633- 4
M A X4 9 1 2E TE+ * - 40°C to + 85°C 16 TQFN- E P ** AE A T1633- 4
+ Denotes lead-free package.
*Future product—contact factory for availability.
**EP = Exposed pad.
Typical Operating Circuit appears at end of data sheet.