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ADG788 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADG788
Beschreibung 2.5ohm/ 1.8V to 5.5V/ +-2.5 V Triple/Quad SPDT Switches in Chip Scale Packages
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 12 Seiten
ADG788 Datasheet, Funktion
a 2.5 , 1.8 V to 5.5 V, ؎2.5 V Triple/Quad
SPDT Switches in Chip Scale Packages
ADG786/ADG788
FEATURES
1.8 V to 5.5 V Single Supply
؎2.5 V Dual Supply
2.5 On Resistance
0.5 On Resistance Flatness
100 pA Leakage Currents
19 ns Switching Times
Triple SPDT: ADG786
Quad SPDT: ADG788
20-Lead 4 mm ؋ 4 mm Chip Scale Packages
Low Power Consumption
TTL/CMOS-Compatible Inputs
For Functionally-Equivalent Devices in 16-Lead TSSOP
Packages, See ADG733/ADG734
APPLICATIONS
Data Acquisition Systems
Communication Systems
Relay Replacement
Audio and Video Switching
Battery-Powered Systems
FUNCTIONAL BLOCK DIAGRAMS
S1B
ADG786
S1A
D1 D1
S1A S3A S1B
D3
S3B IN1
S2A ADG788
D2 IN2
S2B
S2B
LOGIC
D2
S2A
A0 A1 A2 EN
SWITCHES SHOWN FOR A LOGIC “1” INPUT
S4A
D2
S4B
IN4
IN3
S3B
D3
S3A
GENERAL DESCRIPTION
The ADG786 and ADG788 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 ± 2.5 V make the ADG786 and ADG788 ideal
for battery powered, portable instruments and many other
applications. All channels exhibit break-before-make switch-
ing action preventing momentary shorting when switching
channels. An EN input on the ADG786 is used to enable or
disable the device. When disabled, all channels are switched OFF.
These multiplexers are designed on an enhanced submicron
process that provides low power dissipation yet gives high switch-
ing 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 ADG786 and ADG788 are available in small 20-lead
chip scale packages.
PRODUCT HIGHLIGHTS
1. Small 20-Lead 4 mm × 4 mm Chip Scale Packages (CSP).
2. Single/Dual Supply Operation. The ADG786 and ADG788
are fully specified and guaranteed with 3 V ± 10% and
5 V ± 10% single supply rails, and ± 2.5 V ± 10% dual
supply rails.
3. Low On Resistance (2.5 typical).
4. Low Power Consumption (<0.01 µW).
5. 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 that
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
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2001






ADG788 Datasheet, Funktion
ADG786/ADG788
Table I. ADG786 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
Table II. ADG788 Truth Table
Logic
0
1
Switch A
OFF
ON
Switch B
ON
OFF
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)
CIN
tON
tOFF
tON(EN)
tOFF(EN)
tOPEN
Charge
Off Isolation
Crosstalk
On Response
Insertion Loss
TERMINOLOGY
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.
Digital Input Capacitance
Delay time measured between the 50% and 90% points of the digital inputs and the switch “ON” condition.
Delay time measured between the 50% and 90% points of the digital input and the switch “OFF” condition.
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.
“OFF” time measured between the 80% points of both switches when switching from one address state to another.
A measure of the glitch impulse transferred Injection from the digital input to the analog output during switching.
A measure of unwanted signal coupling through an “OFF” switch.
A measure of unwanted signal that is coupled through from one channel to another as a result of parasitic
capacitance.
The Frequency Response of the “ON” Switch
The Loss Due to the ON Resistance of the Switch.
–6– REV. 0

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