Low Capacitance, 4-/8-Channel
± ±1 ꢀ/ꢁ±ꢂ ꢀ iCMOS™ Multiplexers
ADG±ꢂ08/ADG±ꢂ09
FUNCTIONAL BLOCK DIAGRAMS
FEATURES
<1 pC charge injection over full signal range
1 pF off capacitance
33 V supply range
ADG1208
ADG1209
S1
S1A
S4A
DA
DB
120 Ω on resistance
Fully specified at 1ꢀ V/+12 V
3 V logic compatible inputs
Rail-to-rail operation
Break-before-make switching action
Available in 16-lead TSSOP and 4 mm × 4 mm LFCSP_VQ
Typical power consumption < 0.03 μW
D
S1B
S4B
S8
1-OF-8
DECODER
1-OF-4
DECODER
APPLICATIONS
A0 A1 A2 EN
A0 A1 EN
Audio and video routing
Automatic test equipment
Data-acquisition systems
Battery-powered systems
Sample-and-hold systems
Communication systems
Figure 1.
GENERAL DESCRIPTION
The ADG1208 and ADG1209 are monolithic, iCMOS analog
multiplexers comprising eight single channels and four differential
channels, respectively. The ADG1208 switches one of eight
inputs to a common output as determined by the 3-bit binary
address lines A0, A1, and A2. The ADG1209 switches one of
four differential inputs to a common differential output as
determined by the 2-bit binary address lines A0 and A1. An
EN input on both devices is used to enable or disable the device.
When disabled, all channels are switched off. When on, each
channel conducts equally well in both directions and has an
input signal range that extends to the supplies.
The ultralow capacitance and exceptionally low charge injection
of these multiplexers make them ideal solutions for data
acquisition and sample-and-hold applications, where low glitch
and fast settling are required. Figure 2 shows that there is
minimum charge injection over the entire signal range of the
device. iCMOS construction also ensures ultralow power
dissipation, making the parts ideally suited for portable and
battery powered instruments.
1.0
MUX (SOURCE TO DRAIN)
T
= 25°C
A
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
The iCMOS (industrial CMOS) modular manufacturing
process combines high voltage CMOS (complementary metal-
oxide semiconductor) and bipolar technologies. It enables the
development of a wide range of high performance analog ICs
capable of 33 V operation in a footprint that no other generation
of high voltage parts has been able to achieve. Unlike analog ICs
using conventional CMOS processes, iCMOS components can
tolerate high supply voltages while providing increased
performance, dramatically lower power consumption, and
reduced package size.
V
V
= +15V
= –15V
DD
SS
V
V
= +12V
= 0V
DD
SS
0.1
0
V
V
= +5V
= –5V
DD
SS
–15
–10
–5
0
5
10
15
V
(V)
S
Figure 2. Source to Drain Charge Injection vs. Source Voltage
Rev. 0
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