ADG725/ADG731
G61
REV. PrD May 2002
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16-/32- Channel, Serially Controlled 4 Ω
1.8 V to 5.5 V, ±2.5 V, Analog Multiplexers
Preliminary Technical Data
PRELIMINARY TECHNICAL DATA
FEATURES
3-Wire SPI Serial Interface
1.8 V to 5.5 V Single Supply
±2.5 V Dual Supply Operation
4 Ω On Resistance
0.5 Ω On Resistance Flatness
7mm x 7mm 48 lead Chip Scale Package (CSP)
or 48 lead TQFP package.
Rail to Rail Operation
Power On Reset
Fast Switching Times
Single 32 to 1 Channel Multiplexer
Dual/Differential 16 to 1 Channel Multiplexer
TTL/CMOS Compatible Inputs
For Functionally Equivalent devices with Parallel Interface
See ADG726/ADG732
APPLICATIONS
Optical Applications
Data Acquisition Systems
Communication Systems
Relay replacement
Audio and Video Switching
Battery Powered Systems
Medical Instrumentation
Automatic Test Equipment
GENERAL DESCRIPTION
The ADG725/ADG731 are monolithic CMOS 32
channel/dual 16 channel analog multiplexers with a
serially controlled 3-wire interface. The ADG732 switches
one of thirty-two inputs (S1-S32) to a common output, D.
The ADG725 can be configured as a dual mux switching
one of sixteen inputs to one output or a differential mux
switching one of sixteen inputs to a differential output.
These mulitplexers utilize a 3-wire serial interface that is
compatible with SPI
TM
, QSPI
TM
, MICROWIRE
TM
and
some DSP interface standards. On power-up, the internal
shift register contains all zeros and all switch are in the
OFF state.
These multiplexers are designed on an enhanced submi-
cron process that provides low power dissipation yet gives
high switching speed, very low on resistance and leakage
currents. They operate from single supply of 1.8V to 5.5V
and ±2.5 V dual supply, making them ideally suited to a
variety of applications. On resistance is in the region of a
few Ohms and is closely matched between switches and
very flat over the full signal range. These parts can operate
equally well as either Multiplexers or De-Multiplexers
PRODUCT HIGHLIGHTS
1. 3-Wire Serial Interface.
2. +1.8 V to +5.5 V Single or ±2.5 V Dual Supply
operation. These parts are specified and guaranteed
with +5 V ±10%, +3 V ±10% single supply and
±2.5 V ±10% dual supply rails.
3. On Resistance of 4 Ω.
4. Guaranteed Break-Before-Make Switching Action.
5. 7mm x 7mm 48 lead Chip Scale Package (CSP)
or 48 lead TQFP package.
FUNCTIONAL BLOCK DIAGRAMS
X53X31
X53X33X32
X53X43X4CX4B X44X49X4E X53X59X4EX43
X44
X41X44X47X37X33X31
X49X4EX50X55X54X20X53X48X49X46X54
X52X45X47X49X53X54X45X52
X53X31X41
X44X41
X53X31X36X41
X53X31X42
X53X31X36X42
X44X42
X41X44X47X37X32X35
X49X4EX50X55X54X20X53X48X49X46X54
X52X45X47X49X53X54X45X52
X53X43X4CX4B X44X49X4E X53X59X4EX43
and have an input signal range which extends to the sup-
plies. In the OFF condition, signal levels up to the
supplies are blocked. All channels exhibit break before
make switching action preventing momentary shorting
when switching channels.
They are available in either 48 lead CSP or TQFP
package.