ADG725 Datasheet, PDF (1/15 Pages) Analog Devices – 16-/32- Channel, Serially Controlled 4 Ω 1.8 V to 5.5 V, ±2.5 V, Analog Multiplexers

PRELIMINARY TECHNICAL DATA
= 16-/32- Channel, Serially Controlled 4 Ω
1.8 V to 5.5 V, ±2.5 V, Analog Multiplexers
Preliminary Technical Data
ADG725/ADG731
FEATURES
3-Wire SPI Serial Interface
FUNCTIONAL BLOCK DIAGRAMS
1.8 V to 5.5 V Single Supply
±2.5 V Dual Supply Operation
ADG731
ADG725
4 Ω On Resistance
0.5 Ω On Resistance Flatness
S1
S1A
7mm x 7mm 48 lead Chip Scale Package (CSP)
or 48 lead TQFP package.
DA
S16A
Rail to Rail Operation
D
Power On Reset
Fast Switching Times
Single 32 to 1 Channel Multiplexer
Dual/Differential 16 to 1 Channel Multiplexer
S32
S1B
DB
S16B
TTL/CMOS Compatible Inputs
For Functionally Equivalent devices with Parallel Interface
See ADG726/ADG732
INPUT SHIFT
REGISTER
INPUT SHIFT
REGISTER
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
SCLK DIN SYNC
SCLK DIN SYNC
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.
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.
REV. PrD May 2002
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