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Analog Devices Semiconductor Electronic Components Datasheet

ADGS1212 Datasheet

Mux Configurable

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Data Sheet
SPI Interface, Quad SPST Switch, Low QINJ,
Low CON, ±15 V/+12 V, Mux Configurable
ADGS1212
FEATURES
SPI interface with error detection
Includes CRC, invalid read/write address, and SCLK count
error detection
Supports burst mode and daisy-chain mode
Industry-standard SPI Mode 0 and SPI Mode 3 compatible
Guaranteed break-before-make switching allowing external
wiring of switches to deliver multiplexer configurations
VSS to VDD analog signal range
Fully specified at ±15 V and +12 V supply
±4.5 V to ±16.5 V dual-supply operation
5 V to 16.5 V single-supply operation
Ultralow capacitance and leakage allows fast settling time
1 pF typical off switch drain capacitance at 25°C, ±15 V
2.6 pF typical on switch capacitance at 25°C, ±15 V
<1 pC typical charge injection at 25°C
1.8 V logic compatibility with 2.7 V ≤ VL ≤ 3.3 V
APPLICATIONS
Automated test equipment
Data acquisition systems
Battery-powered systems
Sample-and-hold systems
Audio signal routing
Video signal routing
Communications systems
GENERAL DESCRIPTION
The ADGS1212 contains four independent single-pole/single-
throw (SPST) switches. A serial peripheral interface (SPI)
controls the switches. The SPI interface has robust error detection
features such as cyclic redundancy check (CRC) error detection,
invalid read/write address detection, and SCLK count error
detection.
It is possible to daisy-chain multiple ADGS1212 devices together.
Daisy-chain mode enables the configuration of multiple devices
with minimal digital lines. The ADGS1212 can also operate in
burst mode to decrease the time between SPI commands.
iCMOS construction ensures ultralow power dissipation, making
the device ideal for portable and battery-powered instruments.
Each switch conducts equally well in both directions when on,
and each switch has an input signal range that extends to the
supplies.
FUNCTIONAL BLOCK DIAGRAM
ADGS1212
S1 D1
S2 D2
S3 D3
S4 D4
SPI
INTERFACE
SDO
SCLK SDI CS RESET/VL
Figure 1.
In the off condition, signal levels up to the supplies are blocked.
The ultralow capacitance and charge injection of these switches
make them ideal solutions for data acquisition and sample-and-
hold applications where low glitch and fast settling are required.
Fast switching speed coupled with high signal bandwidth make
the device suitable for video signal switching.
Multifunction pin names may be referenced by their relevant
function only.
PRODUCT HIGHLIGHTS
1. SPI interface removes the need for parallel conversion,
logic traces, and reduces the general-purpose input/output
(GPIO) channel count.
2. Daisy-chain mode removes additional logic traces when
multiple devices are used.
3. CRC error detection, invalid read/write address detection,
and SCLK count error detection ensure a robust digital
interface.
4. CRC and error detection capabilities allow the ADGS1212
to be used in safety critical systems.
5. Guaranteed break-before-make switching allows the the
ADGS1212 to be used in multiplexer configurations with
external wiring.
6. The ADGS1212 1.8 V logic compatibility with 2.7 V ≤ VL
3.3 V
7. Ultralow capacitance.
8. <1 pC charge injection.
Rev. 0
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2017 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

ADGS1212 Datasheet

Mux Configurable

No Preview Available !

ADGS1212
TABLE OF CONTENTS
Features .............................................................................................. 1 
Applications....................................................................................... 1 
General Description ......................................................................... 1 
Functional Block Diagram .............................................................. 1 
Product Highlights ........................................................................... 1 
Revision History ............................................................................... 2 
Specifications..................................................................................... 3 
±15 V Dual Supply ....................................................................... 3 
12 V Single Supply........................................................................ 5 
Continuous Current per Channel, Sx or Dx............................. 6 
Timing Characteristics ................................................................ 7 
Absolute Maximum Ratings............................................................ 9 
Thermal Resistance ...................................................................... 9 
ESD Caution.................................................................................. 9 
Pin Configuration and Function Descriptions........................... 10 
Typical Performance Characteristics ........................................... 11 
Test Circuits..................................................................................... 14 
Terminology .................................................................................... 16 
Theory of Operation ...................................................................... 17 
Address Mode ............................................................................. 17 
REVISION HISTORY
9/2017—Revision 0: Initial Version
Data Sheet
Error Detection Features ........................................................... 17 
Clearing the Error Flags Register ............................................. 18 
Burst Mode.................................................................................. 18 
Software Reset............................................................................. 18 
Daisy-Chain Mode ..................................................................... 18 
Power-On Reset.......................................................................... 19 
Applications Information .............................................................. 20 
Break-Before-Make Switching.................................................. 20 
Power Supply Rails ..................................................................... 20 
Power Supply Recommendations............................................. 20 
Register Summary .......................................................................... 21 
Register Details ............................................................................... 22 
Switch Data Register .................................................................. 22 
Error Configuration Register.................................................... 22 
Error Flags Register.................................................................... 23 
Burst Enable Register................................................................. 23 
Software Reset Register ............................................................. 23 
Outline Dimensions ....................................................................... 24 
Ordering Guide .......................................................................... 24 
Rev. 0 | Page 2 of 24


Part Number ADGS1212
Description Mux Configurable
Maker Analog Devices
Total Page 24 Pages
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