Data Sheet ADGS1612
Rev. 0 | Page 25 of 29
APPLICATIONS INFORMATION
BREAK-BEFORE-MAKE SWITCHING
The ADGS1612 exhibits break-before-make switching action,
which allows the use of the device in multiplexer applications. A
multiplexer can be achieved by externally hardwiring the device
in the mux configuration that is required, as shown in Figure 45.
4 × SPST
S1
S4
S2
S3
D
1
4:1 MUX
SCLK SDI
CS
RESET/V
L
SPI
INTERFACE
16054-045
1
ALL Dx PINS ARE CONNECTED AS ONE DRAIN.
Figure 45. SPI Controlled Switch Configured as a 4:1 Mux
DIGITAL INPUT BUFFERS
There are input buffers present on the digital inputs pins,
CS
,
SCLK, and SDI. These buffers are active at all times. Therefore,
there is current draw from the V
L
supply if SCLK or SDI is
toggling, regardless of whether
CS
is active. For typical values of
this current draw, refer to the Specifications section and Figure 26.
POWER SUPPLY RAILS
To guarantee correct operation of the ADGS1612, 0.1 μF
decoupling capacitors are required.
The ADGS1612 can operate with bipolar supplies between
±3.3 V and ±8 V. The supplies on V
DD
and V
SS
do not have to be
symmetrical; however, the V
DD
to V
SS
range must not exceed
16 V. The ADGS1612 can also operate with single supplies
between 3.3 V and 16 V with V
SS
connected to GND.
The voltage range that can be supplied to V
L
is from 2.7 V to 5.5 V.
The device is fully specified at ±5 V, 12 V, 5 V, and 3.3 V analog
supply voltage ranges.
