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ADG3247BRU-REEL7

P1-P3P4-P6P7-P9P10-P12P13-P13
REV. 0
ADG3247
2.5 V/3.3 V, 16-Bit, 2-Port
Level Translating, Bus Switch
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. Trademarks and
registered trademarks are the property of their respective companies.
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 © 2003 Analog Devices, Inc. All rights reserved.
FEATURES
225 ps Propagation Delay through the Switch
4.5 Switch Connection between Ports
Data Rate 1.244 Gbps
2.5 V/3.3 V Supply Operation
Selectable Level Shifting/Translation
Small Signal Bandwidth 610 MHz
Level Translation
3.3 V to 2.5 V
3.3 V to 1.8 V
2.5 V to 1.8 V
40-Lead 6 mm 6 mm LFCSP and 38-Lead TSSOP
Packages
APPLICATIONS
3.3 V to 1.8 V Voltage Translation
3.3 V to 2.5 V Voltage Translation
2.5 V to 1.8 V Voltage Translation
Bus Switching
Bus Isolation
Hot Plug
Hot Swap
Analog Switching Applications
FUNCTIONAL BLOCK DIAGRAM
A7
B7
BE1
A0
B0
A15
B15
BE2
A8
B8
GENERAL DESCRIPTION
The ADG3247 is a 2.5 V or 3.3 V 16-bit, 2-port digital switch.
It is designed on Analog Devices’ low voltage CMOS process,
which provides low power dissipation yet gives high switching
speed and very low on resistance, allowing inputs to be connected
to outputs without additional propagation delay or generating
additional ground bounce noise.
The ADG3247 is organized as dual 8-bit bus switches with
separate bus enable (BEx) inputs. This allows the device to be
used as two 8-bit digital switches or one 16-bit bus switch. These
bus switches allow bidirectional signals to be switched when ON.
In the OFF condition, signal levels up to the supplies are blocked.
This device is ideal for applications requiring level translation.
When operated from a 3.3 V supply, level translation from 3.3 V
inputs to 2.5 V outputs occurs. Similarly, if the device is operated
from a 2.5 V supply and 2.5 V inputs are applied, the device will
translate the outputs to 1.8 V. In addition to this, the ADG3247
has a level translating select pin (SEL). When SEL is low, V
CC
is
reduced internally, allowing for level translation between 3.3 V
inputs and 1.8 V outputs. This makes the device suited to appli-
cations requiring level translation between different supplies, such
as converter to DSP/microcontroller interfacing.
PRODUCT HIGHLIGHTS
1. 3.3 V or 2.5 V supply operation
2. Extremely low propagation delay through switch
3. 4.5 W switches connect inputs to outputs
4. Level/voltage translation
5. 40-lead 6 mm ⫻ 6 mm LFCSP and 38-lead TSSOP packages
ADG3247* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
View a parametric search of comparable parts.
DOCUMENTATION
Data Sheet
• ADG3247: 2.5 V/3.3 V, 16 Bit, 2 Port Level Translator, Bus
Switch Data Sheet
REFERENCE MATERIALS
Product Selection Guide
• Switches and Multiplexers Product Selection Guide
Technical Articles
• CMOS Switches Offer High Performance in Low Power,
Wideband Applications
• Data-acquisition system uses fault protection
• Enhanced Multiplexing for MEMS Optical Cross Connects
DESIGN RESOURCES
• ADG3247 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
DISCUSSIONS
View all ADG3247 EngineerZone Discussions.
SAMPLE AND BUY
Visit the product page to see pricing options.
TECHNICAL SUPPORT
Submit a technical question or find your regional support
number.
DOCUMENT FEEDBACK
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REV. 0–2–
ADG3247–SPECIFICATIONS
1
(V
CC
= 2.3 V to 3.6 V, GND = 0 V, all specifications T
MIN
to T
MAX
, unless otherwise
noted.)
B Version
Parameter Symbol Conditions Min Typ
2
Max Unit
DC ELECTRICAL CHARACTERISTICS
Input High Voltage V
INH
V
CC
= 2.7 V to 3.6 V 2.0 V
V
INH
V
CC
= 2.3 V to 2.7 V 1.7 V
Input Low Voltage V
INL
V
CC
= 2.7 V to 3.6 V 0.8 V
V
INL
V
CC
= 2.3 V to 2.7 V 0.7 V
Input Leakage Current I
I
± 0.01 ± 1 mA
OFF State Leakage Current I
OZ
0 ⱕ A, B ⱕ V
CC
± 0.01 ± 1 mA
ON State Leakage Current I
OL
0 ⱕ A, B ⱕ V
CC
± 0.01 ± 1 mA
Maximum Pass Voltage V
P
V
A
/V
B
= V
CC
= SEL = 3.3 V, I
O
= –5 mA 2.0 2.5 2.9 V
V
A
/V
B
= V
CC
= SEL = 2.5 V, I
O
= –5 mA 1.5 1.8 2.1 V
V
A
/V
B
= V
CC
= 3.3 V, SEL = 0 V, I
O
= –5 mA 1.5 1.8 2.1 V
CAPACITANCE
3
A Port Off Capacitance C
A
OFF f = 1 MHz 5 pF
B Port Off Capacitance C
B
OFF f = 1 MHz 5 pF
A, B Port On Capacitance
C
A
, C
B
ON
f = 1 MHz 10 pF
Control Input Capacitance C
IN
f = 1 MHz 6 pF
SWITCHING CHARACTERISTICS
3
Propagation Delay A to B or B to A,
t
PD
4
t
PHL,
t
PLH
C
L
= 50 pF, V
CC
=
SEL =
3 V 0.225 ns
Propagation Delay Matching
5
22.5 ps
Bus Enable Time BEx to A or B
6
t
PZH
, t
PZL
V
CC
= 3.0 V to 3.6 V;
SEL = V
CC
1 3.2 4.8 ns
Bus Disable Time BEx to A or B
6
t
PHZ
, t
PLZ
V
CC
= 3.0 V to 3.6 V;
SEL = V
CC
1 3.2 4.8 ns
Bus Enable Time BEx to A or B
6
t
PZH
, t
PZL
V
CC
= 3.0 V to 3.6 V;
SEL = 0 V
0.5 2.2 3.3 ns
Bus Disable Time BEx to A or B
6
t
PHZ
, t
PLZ
V
CC
= 3.0 V to 3.6 V;
SEL = 0 V
0.5 1.7 2.9 ns
Bus Enable Time BEx to A or B
6
t
PZH
, t
PZL
V
CC
= 2.3 V to 2.7 V;
SEL = V
CC
0.5 2.2 3 ns
Bus Disable Time BEx to A or B
6
t
PHZ
, t
PLZ
V
CC
= 2.3 V to 2.7 V;
SEL = V
CC
0.5 1.75 2.6 ns
Maximum Data Rate V
CC
= SEL = 3.3 V; V
A
/V
B
= 2 V 1.244 Gbps
Channel Jitter V
CC
= SEL = 3.3 V; V
A
/V
B
= 2 V 50 ps p-p
Operating Frequency—Bus Enable f
BEx
10 MHz
DIGITAL SWITCH
On Resistance R
ON
V
CC
= 3 V, SEL = V
CC
, V
A
= 0 V, I
BA
= 8 mA
4.5 8
W
V
CC
= 3 V, SEL = V
CC
, V
A
= 1.7 V, I
BA
= 8 mA
15 28
W
V
CC
= 2.3 V, SEL = V
CC
, V
A
= 0 V, I
BA
= 8 mA
59
W
V
CC
= 2.3 V, SEL = V
CC
, V
A
= 1 V, I
BA
= 8 mA
11 18
W
V
CC
= 3 V, SEL = 0 V, V
A
= 0 V, I
BA
= 8 mA
58
W
V
CC
= 3 V, SEL = 0 V, V
A
= 1 V, I
BA
= 8 mA
14
W
On Resistance Matching DR
ON
V
CC
= 3 V, SEL = V
CC
, V
A
= 0 V, I
BA
= 8 mA
0.45
W
V
CC
= 3 V, SEL = V
CC
, V
A
= 1 V, I
BA
= 8 mA
0.65
W
POWER REQUIREMENTS
V
CC
2.3 3.6 V
Quiescent Power Supply Current I
CC
Digital Inputs = 0 V or V
CC
; SEL = V
CC
0.001 1 mA
I
CC
Digital Inputs = 0 V or V
CC
; SEL = 0 V 0.65 1.2 mA
Increase in I
CC
per Input
7
D I
CC
V
CC
= 3.6 V, BE
1
= 3.0 V;
BE
2
= V
CC
or GND;
SEL = V
CC
85 mA
NOTES
1
Temperature range is as follows: B Version: –40∞C to +85∞C.
2
Typical values are at 25∞C, unless otherwise stated.
3
Guaranteed by design, not subject to production test.
4
The digital switch contributes no propagation delay other than the RC delay of the typical R
ON
of the switch and the load capacitance when driven by an ideal voltage
source. Since the time constant is much smaller than the rise/fall times of typical driving signals, it adds very little propagation delay to the system. Propagation delay
of the digital switch when used in a system is determined by the driving circuit on the driving side of the switch and its interaction with the load on the driven side.
5
Propagation delay matching between channels is calculated from the on resistance matching and load capacitance of 50 pF.
6
See Timing Measurement Information section.
7
This current applies to the control pins (BEx) only. The A and B ports contribute no significant ac or dc currents as they transition.
Specifications subject to change without notice.
P1-P3P4-P6P7-P9P10-P12P13-P13

ADG3247BRU-REEL7

Mfr. #:
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Manufacturer:
Analog Devices Inc.
Description:
Translation - Voltage Levels 2.5V/3.3V 16-Bit 2-Port Bus Switch
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