Low Voltage, 300 MHz Quad 2:1 Mux Analog
HDTV Audio/Video Switch
ADG794
Rev. B
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FEATURES
Bandwidth: 300 MHz
Low insertion loss and on resistance: 5 Ω typical
On-resistance flatness: 0.7 Ω typical
Single 3.3 V/5 V supply operation
Low quiescent supply current: 1 nA typical
Fast switching times
t
ON
, 7 ns
t
OFF
, 5 ns
TTL/CMOS compatible
ESD protection
2 kV human body model (HBM)
200 V machine model (MM)
1 kV field-induced charged device model (FICDM)
APPLICATIONS
RGB switches
HDTV
DVD-R
Audio/video switches
FUNCTIONAL BLOCK DIAGRAM
1 OF 2
DECODER
ADG794
EN
IN
S1A
S1B
S2A
S2B
S3A
S3B
S4A
S4B
D1
D2
D3
D4
05150-001
Figure 1.
GENERAL DESCRIPTION
The ADG794 is a monolithic CMOS device comprising four
2:1 multiplexers/demultiplexers with high impedance outputs.
The CMOS process provides low power dissipation yet gives high
switching speed and low on resistance. The on-resistance variation
is less than 1.2 Ω over the input signal range.
The wide bandwidth of the ADG794 (300 MHz typical), coupled
with low distortion (0.18% typical), makes the part suitable for
switching analog audio/video signals.
The ADG794 operates from a single 3.3 V/5 V supply and is TTL
logic compatible. The switches are controlled by the logic inputs
IN and
EN
, as shown in Table 4. The
EN
pin allows the user to
disable all switches.
These switches conduct equally well in both directions when on.
In the off condition, signal levels up to the supplies are blocked.
The ADG794 switches exhibit break-before-make switching action.
The ADG794 is available in a 16-lead QSOP.
PRODUCT HIGHLIGHTS
1. Wide bandwidth: 300 MHz.
2. Ultralow power dissipation.
3. Crosstalk: −70 dB (typical) at 10 MHz.
4. Off isolation: −65 dB (typical) at 10 MHz.
5. ESD protection tested as per ESD Association Standards:
2 kV HBM (ANSI/ESD STM5.1-2001)
200 V MM (ANSI/ESD STM5.2-1999)
1 kV FICDM (ANSI/ESD STM5.3.1-1999)
