High Temperature, Low Voltage
8-Channel Multiplexer
ADG798
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Extreme high temperature operation
Specified temperature range
−55°C to +210°C (16-lead FLATPACK)
−55°C to +175°C (16-lead TSSOP)
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
ADG798
S1
D
S8
APPLICATIONS
A0 A1
Downhole drilling and instrumentation
Avionics
Heavy industrial
High temperature environments
A2 EN
14880-001
1 OF 8
DECODER
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.
packages have an operating temperature range of −55°C to +210°C.
A 16-lead TSSOP package is also available that has an operating
temperature range of −55°C to +175°C. All packages are designed
for robustness at extreme temperatures, and are qualified for
1000 hours of continuous operation at the maximum temperature
rating.
The ADG798 features low power consumption and a 3.3 V to
5.5 V operating supply range. All channels exhibit break-beforemake 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 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.
The on resistance (RON) 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.
1.
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 of the flat
Rev. A
PRODUCT HIGHLIGHTS
2.
3.
4.
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.
Low RON.
The RON of the ADG798 is specified at 5 Ω, typical, at 210°C.
Low Power Consumption.
The power consumption of the ADG798 is specified at
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