High Temperature, Low Voltage
8-Channel Multiplexer
Data Sheet
ADG798
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.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2016 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
FEATURES
Extreme high temperature operation up to 210°C
3.0 V to 5.5 V single supply
±2.5 V dual supply
10 Ω on resistance, maximum
2 Ω on-resistance flatness, maximum
12 ns switching times
Single 8:1 multiplexer
Low power consumption
TTL-/CMOS-compatible inputs
APPLICATIONS
Downhole drilling and instrumentation
Avionics
Heavy industrial
High temperature environments
FUNCTIONAL BLOCK DIAGRAM
1
8
A0
D
A1 A2
ADG798
EN
1 OF 8
DECODER
14880-001
Figure 1.
GENERAL DESCRIPTION
The ADG798 is a low voltage, CMOS, analog multiplexer
designed to operate at very high temperatures up to 210°C. The
ADG798 switches one of eight inputs (S1 to S8) to a common
output, D, as determined by the 3-bit binary address lines A0,
A1, and A2. An EN input on the device enables or disables the
device. When the device is disabled, all channels are switched off.
The ADG798 features low power consumption and a 3.3 V to
5.5 V operating supply range. All channels exhibit break-before-
make switching action, preventing momentary shorting when
switching channels. These switches are designed with an enhanced
submicron process that provides low power dissipation, high
switching speed, and very low on resistance.
The on resistance (R
ON
) is a maximum of 10 Ω and is closely
matched between switches and very flat over the full signal range.
The ADG798 operates equally well as either a multiplexer or a
demultiplexer and has an input signal range that extends to
the supplies.
This mux is available in a 16-lead ceramic flat package
(FLATPACK) and a 16-lead ceramic flat package with reverse
formed gullwing leads (FLATPACK_RF). Both packages have
an operating temperature range of −55°C to +210°C, are designed
for robustness at extreme temperatures, and are qualified for
1000 hours of continuous operation at the maximum
temperature rating.
The ADG798 is a member of a growing series of high temperature
qualified products offered by Analog Devices, Inc. For a
complete selection table of available high temperature products,
see the high temperature product list and qualification data
available at http://www.analog.com/hightemp.
PRODUCT HIGHLIGHTS
1. Single-Supply/Dual-Supply Operation.
The ADG798 is fully specified and guaranteed with 3.3 V
and 5 V single-supply rails and ±2.5 V dual-supply rails.
2. Low R
ON
.
The R
ON
of the ADG798 is specified at 5 , typical, at 210°C.
3. Low Power Consumption.
The power consumption of the ADG798 is specified at
<0.01 W.
4. Guaranteed Break-Before-Make Switching Action.
