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AD7306AR-REEL

P1-P3P4-P6P7-P9P10-P10
a
+5 V Powered
RS-232/RS-422 Transceiver
AD7306
FEATURES
RS-232 and RS-422 on One Chip
Single +5 V Supply
0.1 mF Capacitors
Short Circuit Protection
Excellent Noise Immunity
Low Power BiCMOS Technology
High Speed, Low Skew RS-422 Operation
–408C to +858C Operations
APPLICATIONS
DTE-DCE Interface
Packet Switching
Local Area Networks
Data Concentration
Data Multiplexers
Integrated Services Digital Network (ISDN)
GENERAL DESCRIPTION
The AD7306 line driver/receiver is a 5 V monolithic product
which provides an interface between TTL signal levels and dual
standard EIA RS-232/RS-422 signal levels. The part contains
two RS-232 drivers, one RS-422 driver, one RS-232 receiver,
and one receiver path which can be configured either as RS-232
or as RS-422.
An internal charge pump voltage converter facilitates operation
from a single +5 V power supply. The internal charge pump
generates ±10 V levels allowing RS-232 output levels to be de-
veloped without the need for external bipolar power supplies.
A highly efficient charge pump design allows operation using
non polarized, miniature 0.1 µF capacitors. This gives a consid-
erable saving in printed circuit board space over conventional
products which can use up to 10 µF capacitors. The charge
pump output voltages may also be used to power external cir-
cuitry which requires dual supplies.
The RS-232 channels are suitable for communications rates up
to 100 kHz and the RS-422 channels are suitable for high speed
communications up to 5 MHz. The RS-422 transmitter comple-
mentary outputs are closely matched and feature low timing
skew between the complementary outputs. This is often an es-
sential requirement to meet tight system timing specifications.
All inputs feature ESD protection, all driver outputs feature
high source and sink current capability and are internally pro-
tected against short circuits on the outputs. An epitaxial layer is
used to guard against latch-up.
The part is available in a 24-lead SOIC and 24-pin plastic DIP
package.
FUNCTIONAL BLOCK DIAGRAM
V+
C1+
C1–
V–
C2–
C2+
GND
NC
NC
NC = NO CONNECT
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
16
15
14
13
20
19
18
17
AD7306
SOIC
TOP VIEW
(Not to Scale)
GND
R1
IN
/R1
IN
(A)
T2
OUT
T1
OUT
R2
IN
R1
IN
(B)
T3
OUT
(B)
R2
OUT
T3
IN
232/422 SEL
V
CC
R1
OUT
T1
IN
T2
IN
T3
OUT
(A)
–
–2–
–2–
Rev. C Document Feedback
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. Specifications subject to change without notice. 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 owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2017 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
REV. C
–2–
AD7306–SPECIFICATIONS
(V
CC
= +5 V 6 5%, C1 = C2 = C3 = C4 = 0.1 mF. All specifications T
MIN
to
T
MAX
unless otherwise noted.)
Parameter Min Typ Max Units Test Conditions/Comments
RS-232 DRIVER
TTL Input Logic Low, V
INL
0.8 V
TTL Input Logic High, V
INH
2.0 V
Input Logic Current 0.1 ±10 µAV
IN
= 0 V to V
CC
RS-232 High Level Output Voltage 5.0 7.3 V R
L
= 3 kΩ
RS-232 Low Level Output Voltage –5.0 –6.5 V R
L
= 3 kΩ
Output Short Circuit Current ±5 ±12 mA V
OUT
= 0 V, T
A
= 0°C to +70°C
Slew Rate 8 20 30 V/µsC
L
= 50 pF, R
L
= 3 kΩ
4V/µsC
L
= 2500 pF, R
L
= 3 kΩ
Output Resistance (Powered Down) 300 10M Ω V
CC
= 0 V, V
OUT
= ±3 V
RS-232 RECEIVER
Input Voltage Range –15 +15 V
RS-232 Input Threshold Low 0.8 1.3 V
RS-232 Input Threshold High 1.7 2.4 V
RS-232 Input Hysteresis 0.1 0.4 1.0 V
RS-232 Input Resistance 3 5 7 kΩ
TTL Output Voltage Low, V
OL
0.2 0.4 V I
OUT
= +4 mA
TTL Output Voltage High, V
OH
3.5 4.8 V I
OUT
= –4 mA
RS-422 DRIVER
TTL Input Logic Low, V
INL
0.8 V
TTL Input Logic High, V
INH
2.0 V
Logic Input Current 0.1 ±10 µAV
IN
= 0 V to V
CC
Differential Output Voltage 5.0 V V
CC
= 5 V, R
L
Diff = ∞; Figure 3
2VR
L
Diff = 100 Ω; Figure 3
Common-Mode Output Voltage 3 V
∆|V
OUT
| for Complementary O/P States 0.2 V R
L
Diff = 100 Ω
Output Short Circuit Current 35 150 mA 0 V ≤ V
CMR
≤ +7 V
RS-422 RECEIVER
Common-Mode Voltage Range ±7 V Typical RS-422 Input Voltage <5 V
Differential Input Threshold Voltage –0.2 +0.2 V
Input Voltage Hysteresis 70 mV V
CM
= 0 V
Input Resistance 3 5 7 kΩ
TTL Output Voltage Low, V
OL
0.2 0.4 V I
OUT
= +4.0 mA
TTL Output Voltage High, V
OH
3.5 4.8 V I
OUT
= –4.0 mA
232/
422 SEL Input
Input Logic Low, V
INL
0.8 V
Input Logic High, V
INH
2.0 V
Logic Input Current 0.1 ±10 µAV
IN
= 0 V to V
CC
POWER SUPPLY CURRENT
I
CC
10 15 mA Outputs Unloaded
CHARGE PUMP VOLTAGE GENERATOR
V+ Output Voltage 9 V RS-232 Output Unloaded;
See Typical Performance Curves
V– Output Voltage –9 V RS-232 Outputs Unloaded;
See Typical Performance Curves
Generator Rise Time 200 µs
Specifications subject to change without notice.
AD7306
REV. C
–3–
Parameter Typ Max Units Test Conditions/Comments
RS-422 Driver
Propagation Delay Input to Output T
PLH
, T
PHL
35 100 ns R
L
Diff = 100 Ω. C
L1
= C
L2
= 100 pF, Figures 2 & 4
RS-422 O/P to O/P T
SKEW
210nsR
L
Diff = 100 Ω. C
L1
= C
L2
= 100 pF, Figures 2 & 4
Driver Rise/Fall Time T
R
, T
F
15 40 ns R
L
Diff = 100 Ω. C
L1
= C
L2
= 100 pF, Figures 2 & 4
RS-422 Receiver
Propagation Delay Input to Output T
PLH
, T
PHL
70 200 ns C
L
= 15 pF. Figure 5
RS-232/RS-422 Enable
RS-232 Disable to RS-422 Enable T
EN1
70 200 ns Figure 6
RS-422 Disable to RS-232 Enable T
EN2
70 200 ns Figure 6
Transmission Rate (RS-422) 5 MHz
RS-232 Receiver
Propagation Delay Input to Output 1000 ns
Transmission Rate (RS-232) 100 kHz C
L
= 50 pF
20 kHz C
L
= 2.5 nF
TIMING SPECIFICATIONS
(V
CC
= +5 V 6 5%, C1 = C2 = C3 = C4 = 0.1 mF. All specifications T
MIN
to T
MAX
unless otherwise noted.)
ABSOLUTE MAXIMUM RATINGS*
(T
A
= +25°C unless otherwise noted)
V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7 V
V+ . . . . . . . . . . . . . . . . . . . . . . . . . . .(V
CC
–0.3 V) to +13.2 V
V– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+0.3 V to –13.2 V
Inputs
T1
IN
, T2
IN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .V– to V+
T3
IN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .–0.3 V to V+
R1
IN
A/B, R2
IN
. . . . . . . . . . . . . . . . . . . . . . .–25 V to +25 V
232/
422 SEL . . . . . . . . . . . . . . . . . . . . . . . . . .–0.3 V to V+
Outputs
T1
OUT
, T2
OUT
. . . . . . . . . . . . . . . . . . . . . . .–15 V to +15 V
T3
OUT
(A), (B) . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
R1
OUT
, R2
OUT
. . . . . . . . . . . . . . . . –0.3 V to (V
CC
+ 0.3 V)
Short Circuit Duration
T
OUT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Continuous
Power Dissipation
Small Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 650 mW
DIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 650 mW
Operating Temperature Range
Commercial (J Version) . . . . . . . . . . . . . . . . . 0°C to +70°C
Industrial (A Version) . . . . . . . . . . . . . . . . –40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . +300°C
*Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those listed in the
operational sections of this specification is not implied. Exposure to absolute
maximum ratings for extended periods of time may affect device reliability.
WARNING!
ESD SENSITIVE DEVICE
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD7306 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
P1-P3P4-P6P7-P9P10-P10

AD7306AR-REEL

Mfr. #:
Buy AD7306AR-REEL
Manufacturer:
Analog Devices Inc.
Description:
RS-232 Interface IC IC +5 V PWR RS-232/RS-422 TNSCVR
Lifecycle:
New from this manufacturer.
Delivery:
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