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ADM1490E の電気的特性と機能

ADM1490EのメーカーはAnalog Devicesです、この部品の機能は「Full-Duplex RS-485 Transceivers」です。


製品の詳細 ( Datasheet PDF )

部品番号 ADM1490E
部品説明 Full-Duplex RS-485 Transceivers
メーカ Analog Devices
ロゴ Analog Devices ロゴ 




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ADM1490E Datasheet, ADM1490E PDF,ピン配置, 機能
Data Sheet
16 Mbps, ESD Protected,
Full-Duplex RS-485 Transceivers
ADM1490E/ADM1491E
FEATURES
RS-485/RS-422 full-duplex transceiver for high speed
motor control applications
16 Mbps data rate
±8 kV ESD protection on RS-485 input/output pins
Complies with ANSI/TIA/EIA-485-A-1998
Open circuit fail-safe
Suitable for 5 V power supply applications
32 nodes on the bus (1 unit load)
Thermal shutdown protection
Operating temperature range: −40°C to +85°C
ADM1490E packages
Narrow body, 8-lead SOIC
8-lead MSOP
ADM1491E packages
Narrow-body, 14-lead SOIC
10-lead MSOP
APPLICATIONS
RS-485/RS-422 interfaces
Industrial field networks
High data rate motor control
Multipoint data transmission systems
Single-ended-to-differential signal conversion
GENERAL DESCRIPTION
The ADM1490E/ADM1491E are RS-485/RS-422 transceivers
with ±8 kV ESD protection and are suitable for high speed, full-
duplex communication on multipoint transmission lines. In
particular, the ADM1490E/ADM1491E are designed for use in
motor control applications requiring communications at data
rates up to 16 Mbps.
The ADM1490E/ADM1491E are designed for balanced trans-
mission lines and comply with TIA/EIA-485-A-98. The devices
each have a 12 kΩ receiver input impedance for unit load RS-485
operation, allowing up to 32 nodes on the bus.
The differential transmitter outputs and receiver inputs feature
electrostatic discharge circuitry that provides protection to ±8 kV
using the human body model (HBM).
The ADM1490E/ADM1491E operate from a single 5 V power
supply. Excessive power dissipation caused by bus contention
or output shorting is prevented by short-circuit protection and
thermal circuitry. Short-circuit protection circuits limit the
Rev. D
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
FUNCTIONAL BLOCK DIAGRAMS
VCC
ADM1490E
A
RO R
B
DI D
Z
Y
GND
Figure 1.
VCC
ADM1491E
A
RO R
B
RE
DE
DI D
Z
Y
GND
Figure 2.
maximum output current to ±250 mA during fault conditions.
A thermal shutdown circuit senses if the die temperature rises
above 150°C and forces the driver outputs into a high impedance
state under this condition.
The receiver of the ADM1490E/ADM1491E contains a fail-safe
feature that results in a logic high output state if the inputs are
unconnected (floating).
The ADM1490E/ADM1491E feature extremely fast and closely
matched switching times. Minimal driver propagation delays
permit transmission at data rates up to 16 Mbps, and low skew
minimizes EMI interference.
The ADM1490E/ADM1491E are fully specified over the
commercial and industrial temperature ranges. The ADM1490E
is available in two packages: a narrow body, 8-lead SOIC and an
8-lead MSOP. The ADM1491E is also available in two packages:
a narrow body, 14-lead SOIC and a 10-lead MSOP.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2008–2012 Analog Devices, Inc. All rights reserved.

1 Page





ADM1490E pdf, ピン配列
Data Sheet
ADM1490E/ADM1491E
SPECIFICATIONS
4.75 V ≤ VCC ≤ 5.25 V; all minimum/maximum specifications apply over the entire recommended operation range, unless otherwise
noted. All typical specifications are at TA = 25°C, VCC = 5.0 V, unless otherwise noted.
Table 1.
Parameter
SUPPLY CURRENT
Outputs Enabled
Outputs Disabled
DRIVER
Differential Outputs
Differential Output Voltage, Loaded
∆|VOD| for Complementary Output States
Common-Mode Output Voltage
∆|VOC| for Complementary Output States
Output Leakage Current (Y, Z)
Output Short-Circuit Current
Logic Inputs DE, RE, DI
Input Low Voltage
Input High Voltage
Input Current
RECEIVER
Differential Inputs
Differential Input Threshold Voltage
Input Voltage Hysteresis
Input Current (A, B)
Line Input Resistance
Logic Outputs
Output Voltage Low
Output Voltage High
Short-Circuit Current
Three-State Output Leakage Current
Symbol
ICC1
ICC2
|VOD2|
|VOD3|
∆|VOD2|
VOC
∆|VOC|
IO
IO
IOS
VIL
VIH
II
VTH
VHYS
II
RIN
VOL
VOH
IOZR
Min
2.0
1.5
1.5
−100
2.0
−1
−0.2
−0.8
12
4.0
Typ
1.2
0.8
30
30
Max Unit Test Conditions/Comments
2.0 mA Outputs unloaded, digital inputs = VCC or GND
1.5 mA Outputs unloaded, digital inputs = VCC or GND
5.0 V RL = 100 Ω (RS-422), see Figure 21
5.0 V RL = 54 Ω (RS-485), see Figure 21
5.0 V −7 V ≤ VTEST ≤ +12 V, see Figure 22
0.2 V RL = 54 Ω or 100 Ω, see Figure 21
3.0 V RL = 54 Ω or 100 Ω, see Figure 21
0.2 V RL = 54 Ω or 100 Ω, see Figure 21
100 µA DE = 0 V, VDD = 0 V or 5 V, VIN = 12 V
µA DE = 0 V, VDD = 0 V or 5 V, VIN = −7 V
250 mA −7 V < VOUT < +12 V
0.8 V DE, RE, DI
V DE, RE, DI
+1 µA DE, RE, DI
+0.2 V
−7 V < VCM < +12 V
mV VCM = 0 V
1.0 mA VCM = 12 V
mA VCM = −7 V
kΩ −7 V ≤ VCM ≤ +12 V
0.4 V IOUT = +4.0 mA, VA − VB = −0.2 V
V IOUT = −4.0 mA, VA − VB = +0.2 V
85 mA
±1 µA VCC = 5.25 V, 0.4 V < VOUT < 2.4 V
Rev. D | Page 3 of 16


3Pages


ADM1490E 電子部品, 半導体
ADM1490E/ADM1491E
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
Data Sheet
VCC 1
8A
RO 2 ADM1490E 7 B
DI
3
TOP VIEW
(Not to Scale)
6Z
GND 4
5Y
Figure 7. 8-Lead MSOP and 8-Lead SOIC
Pin Configuration
NC 1
14 VCC
RO 2
13 VCC
RE 3 ADM1491E 12 A
DE 4 TOP VIEW 11 B
DI 5 (Not to Scale) 10 Z
GND 6
9Y
GND 7
8 NC
NOTES
1. NC = NO CONNECT. DO NOT CONNECT
TO THIS PIN.
2. PIN 7 IS NOT CONNECTED INTERNALLY.
SHOWN AS GND TO COMPLY WITH
INDUSTRY STANDARD PINOUT.
3. PIN 14 IS NOT CONNECTED INTERNALLY.
SHOWN AS VCC TO COMPLY WITH
INDUSTRY STANDARD PINOUT.
Figure 8. 14-Lead, Narrow Body SOIC
Pin Configuration
RO 1
RE 2
DE 3
DI 4
GND 5
ADM1491E
TOP VIEW
(Not to Scale)
10 VCC
9A
8B
7Z
6Y
Figure 9. 10-Lead MSOP
Pin Configuration
Table 5. Pin Function Descriptions
Pin No.
8-Lead SOIC,
8-Lead MSOP 14-Lead SOIC 10-Lead MSOP
N/A1
1
N/A1
221
N/A1
3
2
N/A1
4
3
3
4
N/A1
N/A1
5
6
7
8
1
N/A1
5
6
7
8
9
10
11
12
13
14
4
5
N/A1
N/A1
6
7
8
9
10
N/A1
Mnemonic
NC
RO
RE
DE
DI
GND
GND
NC
Y
Z
B
A
VCC
VCC
Description
No Connect. This pin is available on the 14-lead SOIC only.
Receiver Output.
Receiver Output Enable. A low level enables the receiver output, whereas
a high level places the receiver output in a high impedance state.
Driver Output Enable. A logic high enables the differential driver outputs,
A and B, whereas a logic low places the differential driver outputs in a
high impedance state.
Driver Input. When the driver is enabled, a logic low on DI forces Pin A low
and Pin B high, whereas a logic high on DI forces Pin A high and Pin B low.
Ground.
Ground. This pin is available on the 14-lead SOIC only.
No Connect. This pin is available on the 14-lead SOIC only.
Noninverting Driver Output Y.
Inverting Driver Output Z.
Inverting Receiver Input B.
Noninverting Receiver Input A.
Power Supply (5 V ± 5%).
Power Supply (5 V ± 5%). This pin is available on the 14-lead SOIC only.
1 N/A indicates not applicable.
Rev. D | Page 6 of 16

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部品番号部品説明メーカ
ADM1490E

Full-Duplex RS-485 Transceivers

Analog Devices
Analog Devices


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