adg1438 Analog Devices, Inc., adg1438 Datasheet

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adg1438

Manufacturer Part Number
adg1438
Description
Serially Controlled, ?15 V/+12 V/?5 V, 8-channel/ 4-channel, Icmos Multiplexers/matrix Switches
Manufacturer
Analog Devices, Inc.
Datasheet

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FEATURES
Serial interface up to 50 MHz
SDO daisy-chaining option
9.5 Ω on resistance @ 25°C
1.6 Ω on-resistance flatness
Fully specified at ±15 V/+12 V/±5 V
3 V logic-compatible inputs
Rail-to-rail operation
20-lead TSSOP and 20-lead ,4 mm × 4 mm LFCSP packages
APPLICATIONS
Relay replacement
Audio and video routing
Automatic test equipment
Data acquisition systems
Temperature measurement systems
Avionics
Battery-powered systems
Communication systems
Medical equipment
GENERAL DESCRIPTION
The ADG1438 and ADG1439 are CMOS analog matrix switches
with a serially controlled 3-wire interface. The ADG1438 is an
8-channel matrix switch, and the ADG1439 is a dual 4-channel
matrix switch.
The ADG1438/ADG1439 use a versatile 3-wire serial interface
that operates at clock rates of up to 50 MHz and is compatible
with standard SPI, QSPI™, MICROWIRE™, and DSP interface
standards. The output of the shift register, SDO, enables a
number of the ADG1438/ADG1439 parts to be daisy-chained.
On power-up, the internal shift register contains all zeros, and
all switches are in the off state.
Each switch conducts equally well in both directions when on,
making these parts suitable for both multiplexing and demulti-
plexing applications. Because each switch is turned on or off by
a separate bit, these parts can also be configured as a type of
switch array, where any, all, or none of the eight switches can be
closed at any time. The input signal range extends to the supply
rails. All channels exhibit break-before-make switching action,
preventing momentary shorting when switching channels.
Rev. 0
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.
Trademarks and registered trademarks are the property of their respective owners.
Serially Controlled, ±15 V/+12 V/±5 V, 8-Channel/
4-Channel, iCMOS Multiplexers/Matrix Switches
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The ultralow on resistance and on-resistance flatness of these
switches make them ideal solutions for data acquisition and
gain switching applications where low distortion is critical.
iCMOS® construction ensures ultralow power dissipation,
making the parts ideally suited for portable and battery-
powered instruments.
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
Table 1. Related Devices
Part No.
ADG1408/ADG1409
S1
S8
SCLK SYNC DIN RESET
50 MHz serial interface.
9.5 Ω on resistance.
1.6 Ω on-resistance flatness.
3 V logic-compatible digital input, V
ADG1438
INPUT SHIFT
REGISTER
Figure 1.
FUNCTIONAL BLOCK DIAGRAM
ADG1438/ADG1439
©2009 Analog Devices, Inc. All rights reserved.
SDO
D
Description
Low on resistance, parallel
interface, 4-/8-channel ±15 V
multiplexers
S1A
S4A
S1B
S4B
SCLK SYNC DIN RESET
INH
ADG1439
INPUT SHIFT
REGISTER
= 2.0 V, V
Figure 2.
www.analog.com
INL
= 0.8 V.
DA
DB
SDO

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