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ADG734 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADG734
Beschreibung CMOS/ 2.5 ohm Low Voltage/ Triple/Quad SPDT Switches
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 11 Seiten
ADG734 Datasheet, Funktion
a
FEATURES
1.8 V to 5.5 V Single Supply
؎3 V Dual Supply
2.5 On Resistance
0.5 On Resistance Flatness
100 pA Leakage Currents
19 ns Switching Times
Triple SPDT: ADG733
Quad SPDT: ADG734
Small TSSOP and QSOP Packages
Low Power Consumption
TTL/CMOS-Compatible Inputs
APPLICATIONS
Data Acquisition Systems
Communication Systems
Relay Replacement
Audio and Video Switching
Battery-Powered Systems
CMOS, 2.5 Low Voltage,
Triple/Quad SPDT Switches
ADG733/ADG734
FUNCTIONAL BLOCK DIAGRAMS
S1B
ADG733
S1A
D1 D1
S1A S3A S1B
D3
S3B
IN1
S2A ADG734
D2 IN2
S2B
S2B
LOGIC
D2
S2A
A0 A1 A2 EN
SWITCHES SHOWN FOR A “1” INPUT LOGIC
S4A
D2
S4B
IN4
IN3
S3B
D3
S3A
GENERAL DESCRIPTION
The ADG733 and ADG734 are low voltage, CMOS devices
comprising three independently selectable SPDT (single pole,
double throw) switches and four independently selectable SPDT
switches respectively.
Low power consumption and operating supply range of 1.8 V to
5.5 V and dual ± 3 V make the ADG733 and ADG734 ideal for
battery powered, portable instruments. All channels exhibit
break-before-make switching action preventing momentary
shorting when switching channels. An EN input on the ADG733
is used to enable or disable the device. When disabled, all chan-
nels are switched OFF.
These 2–1 multiplexers/SPDT switches are designed on an
enhanced submicron process that provides low power dissipation
yet gives high switching speed, very low on resistance, high signal
bandwidths and low leakage currents. On resistance is in the region
of a few ohms, is closely matched between switches and very flat
over the full signal range. These parts can operate equally well
in either direction and have an input signal range which extends
to the supplies.
The ADG733 is available in small TSSOP and QSOP packages,
while the ADG734 is available in a small TSSOP package.
PRODUCT HIGHLIGHTS
1. Single/Dual Supply Operation. The ADG733 and ADG734 are
fully specified and guaranteed with 3 V and 5 V single supply
rails and ± 3 V dual supply rails.
2. Low On Resistance (2.5 typical).
3. Low Power Consumption (<0.01 µW).
4. Guaranteed Break-Before-Make Switching Action.
REV. 0
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2001






ADG734 Datasheet, Funktion
ADG733/ADG734
Table I. ADG733 Truth Table
A2 A1 A0 EN ON Switch
XXX1
0000
0010
0100
0110
1000
1010
1100
1110
None
D1-S1A, D2-S2A, D3-S3A
D1-S1B, D2-S2A, D3-S3A
D1-S1A, D2-S2B, D3-S3A
D1-S1B, D2-S2B, D3-S3A
D1-S1A, D2-S2A, D3-S3B
D1-S1B, D2-S2A, D3-S3B
D1-S1A, D2-S2B, D3-S3B
D1-S1B, D2-S2B, D3-S3B
X = Don’t Care.
Table II. ADG734 Truth Table
Logic
0
1
Switch A
OFF
ON
Switch B
ON
OFF
TERMINOLOGY
VDD
VSS
IDD
ISS
GND
S
D
IN
VD (VS)
RON
RON
RFLAT(ON)
IS (OFF)
ID, IS (ON)
VINL
VINH
IINL(IINH)
CS (OFF)
CD, CS(ON)
Most Positive Power Supply Potential.
Most Negative Power Supply in a Dual Supply
Application. In single supply applications, this
should be tied to ground close to the device.
Positive Supply Current.
Negative Supply Current.
Ground (0 V) Reference.
Source Terminal. May be an input or output.
Drain Terminal. May be an input or output.
Logic Control Input.
Analog Voltage on Terminals D, S
Ohmic Resistance between D and S.
On Resistance Match between Any Two
Channels, i.e., RONmax – RONmin
Flatness is defined as the difference between the
maximum and minimum value of on-resistance
as measured over the specified analog signal range.
Source Leakage Current with the Switch
“OFF.”
Channel Leakage Current with the Switch
“ON.”
Maximum Input Voltage for Logic “0.”
Minimum Input Voltage for Logic “1.”
Input Current of the Digital Input.
“OFF” Switch Source Capacitance.
Measured with reference to ground.
“ON” Switch Capacitance. Measured
with reference to ground.
CIN Digital Input Capacitance.
tON Delay time measured between the 50% and
90% points of the digital inputs and the
switch “ON” condition.
tOFF Delay time measured between the 50% and
90% points of the digital input and the switch
“OFF” condition.
tON(EN)
tOFF(EN)
Delay time between the 50% and 90% points
of the EN digital input and the switch “ON”
condition.
Delay time between the 50% and 90% points
of the EN digital input and the switch “OFF”
condition.
tOPEN
“OFF” time measured between the 80%
points of both switches when switching from
one address state to another.
Charge
Injection
A measure of the glitch impulse transferred
from the digital input to the analog output
during switching.
Off Isolation A measure of unwanted signal coupling
through an “OFF” switch.
Crosstalk
A measure of unwanted signal that is coupled
through from one channel to
another as a result of parasitic capacitance.
Bandwidth
The frequency at which the output is
attenuated by 3 dBs.
On Response The Frequency Response of the “ON” Switch.
Insertion Loss The loss due to the ON resistance of the switch.
–6– REV. 0

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