Low Voltage, 400 MHz, Quad 2:1
Mux with 3 ns Switching Time
Data Sheet
ADG774A
Rev. C Document Feedback
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FEATURES
Bandwidth: >400 MHz
Low insertion loss and on resistance: 2.2 Ω typical
On resistance flatness: 0.3 Ω typical
Single 3 V/5 V supply operation
Very low distortion: <0.3%
Low quiescent supply current: 1 nA typical
Fast switching times
t
ON
= 6 ns
t
OFF
= 3 ns
TTL-/CMOS-compatible
Pb-free packages
16-lead QSSOP
16-lead 3 mm × 3 mm body LFCSP
FUNCTIONAL BLOCK DIAGRAM
1 OF 2
DECODER
ADG774A
EN
IN
S1A
S1B
S2A
S2B
S3A
S3B
S4A
S4B
D1
D2
D3
D4
2373-001
Figure 1.
GENERAL DESCRIPTION
The ADG774A is a monolithic CMOS device comprising four
2:1 multiplexer/demultiplexers with high impedance outputs.
The CMOS process provides low power dissipation yet offers
high switching speed and low on resistance. The on resistance
variation is typically less than 0.5 Ω over the input signal range.
The bandwidth of the ADG774A is typically 400 MHz and this,
coupled with low distortion (typically 0.3%), makes the part
suitable for switching of high speed data signals.
The on resistance profile is very flat over the full analog input
range ensuring excellent linearity and low distortion. CMOS
construction ensures ultralow power dissipation.
The ADG774A operates from a single 3.3 V/5 V supply and is
TTL logic-compatible. The control logic for each switch is
shown in the truth table (see Table 5).
These switches conduct equally well in both directions when
on. In the off condition, signal levels up to the supplies are
blocked. The ADG774A switches exhibit break-before-make
switching action.
PRODUCT HIGHLIGHTS
1. Wide bandwidth data rates of >400 MHz.
2. Ultralow power dissipation.
3. Low leakage over temperature.
4. Break-before-make switching prevents channel shorting
when the switches are configured as a multiplexer.
5. Crosstalk is typically −70 dB @ 10 MHz.
6. Off isolation is typically −65 dB @ 10 MHz.
7. Available in compact 3 mm × 3 mm LFCSP.
