|
|
PDF ADUM2250 Data sheet ( Hoja de datos )
| Número de pieza | ADUM2250 | |
| Descripción | (ADUM2250 / ADUM2251) Dual I2C Isolators | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ADUM2250 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
|
No Preview Available !
Data Sheet
Hot Swappable, Dual I2C Isolators, 5 kV
ADuM2250/ADuM2251
FEATURES
Bidirectional I2C communication
Open-drain interfaces
Suitable for hot swap applications
30 mA current sink capability
1000 kHz operation
3.0 V to 5.5 V supply/logic levels
16-lead SOIC wide body package version (RW-16)
16-lead SOIC wide body enhanced creepage version (RI-16-2)
High temperature operation: 105°C
Safety and regulatory approvals
UL recognition: 5000 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A (RI-16-2 package)
IEC 60601-1: 250 V rms (reinforced)
IEC 60950-1: 400 V rms (reinforced)
VDE certificate of conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 849 V peak
Qualified for automotive applications
APPLICATIONS
Isolated I2C, SMBus, or PMBus interfaces
Multilevel I2C interfaces
Power supplies
Networking
Power-over-Ethernet
GENERAL DESCRIPTION
The ADuM2250/ADuM22511 are hot swappable digital isolators
with nonlatching, bidirectional communication channels that
are compatible with I2C interfaces. This eliminates the need for
splitting I2C signals into separate transmit and receive signals for
use with standalone optocouplers.
The ADuM2250 provides two bidirectional channels, supporting
a complete isolated I2C interface. The ADuM2251 provides one
bidirectional channel and one unidirectional channel for those
applications where a bidirectional clock is not required.
The ADuM2250/ADuM2251 contain hot swap circuitry to
prevent data glitches when an unpowered card is inserted onto
an active bus.
These isolators are based on iCoupler® chip scale transformer
technology from Analog Devices, Inc. iCoupler is a magnetic
isolation technology with performance, size, power consump-
tion, and functional advantages compared to optocouplers. The
ADuM2250/ADuM2251 integrate iCoupler channels with semi-
conductor circuitry to enable a complete, isolated I2C interface
in a small form factor package.
FUNCTIONAL BLOCK DIAGRAMS
GND1 1
NC 2
ADuM2250
16 GND2
15 NC
VDD1 3
NC 4
DECODE
ENCODE
14 VDD2
13 NC
SDA1 5
ENCODE
DECODE
12 SDA2
SCL1 6
DECODE
ENCODE
11 SCL2
GND1 7
ENCODE
DECODE
10 NC
NC 8
9 GND2
NC = NO CONNECT
Figure 1. ADuM2250 Functional Block Diagram
GND1 1
NC 2
ADuM2251
16 GND2
15 NC
VDD1 3
NC 4
DECODE
ENCODE
14 VDD2
13 NC
SDA1 5
SCL1 6
ENCODE
ENCODE
DECODE
DECODE
12 SDA2
11 SCL2
GND1 7
10 NC
NC 8
9 GND2
NC = NO CONNECT
Figure 2. ADuM2251 Functional Block Diagram
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329; other patents pending.
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2007–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
ADuM2250/ADuM2251
PACKAGE CHARACTERISTICS
Table 3.
Parameter
Symbol Min Typ Max Unit Test Conditions/Comments
Resistance (Input to Output)1
RI-O
1012 Ω
Capacitance (Input to Output)1
CI-O
2.2 pF f = 1 MHz
Input Capacitance
CI 4.0 pF
IC Junction-to-Ambient Thermal Resistance θJA
45 °C/W Thermocouple located at center of
package underside
1 The device is considered a 2-terminal device; Pin 1 through Pin 8 are shorted together, and Pin 9 through Pin 16 are shorted together.
REGULATORY INFORMATION
The ADuM2250/ADuM2251 are approved by the organizations listed in Table 4.
Table 4.
UL
Recognized under UL 1577
component recognition program1
Single protection, 5000 V rms
isolation voltage
File E214100
CSA
Approved under CSA Component Acceptance Notice #5A
Basic insulation per CSA 60950-1-07 and IEC 60950-1,
600 V rms (849 V peak) maximum working voltage
RW-16 package:
Reinforced insulation per CSA 60950-1-07 and IEC 60950-1,
380 V rms (537 V peak) maximum working voltage
Reinforced insulation per IEC 60601-1, 125 V rms (176 V peak)
maximum working voltage
RI-16-2 package:
Reinforced insulation per CSA 60950-1-07 and IEC 60950-1,
400 V rms (565 V peak) maximum working voltage
Reinforced insulation per IEC 60601-1, 250 V rms (353 V peak)
maximum working voltage
File 205078
VDE
Certified according to DIN V VDE V 0884-10
(VDE V 0884-10):2006-122
Reinforced insulation, 849 V peak
File 2471900-4880-0001
1 In accordance with UL 1577, each ADuM2250/ADuM2251 is proof tested by applying an insulation test voltage ≥ 6000 V rms for 1 sec (current leakage detection limit = 10 µA).
2 In accordance with DIN V VDE V 0884-10 (VDE V 0884-10):2006-12, each ADuM2250/ADuM2251 is proof tested by applying an insulation test voltage ≥ 1590 V peak for 1 sec
(partial discharge detection limit = 5 pC). The asterisk (*) marking branded on the component designates DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 approval.
INSULATION AND SAFETY-RELATED SPECIFICATIONS
Table 5.
Parameter
Rated Dielectric Insulation Voltage
Minimum External Air Gap (Clearance)
Symbol
L(I01)
Value
5000
8.0 min
Unit
V rms
mm
Minimum External Tracking (Creepage)
L(I02)
RW-16 Package
RI-16-2 Package
Minimum Internal Distance (Internal Clearance)
Tracking Resistance (Comparative Tracking Index)
Isolation Group
CTI
7.7 min
8.3 min
0.017 min
>175
IIIa
mm
mm
mm
V
Test Conditions/Comments
1-minute duration
Distance measured from input terminals to output
terminals, shortest distance through air along the
PCB mounting plane, as an aid to PC board layout
Measured from input terminals to output
terminals, shortest distance path along body
Insulation distance through insulation
DIN IEC 112/VDE 0303, Part 1
Material Group (DIN VDE 0110, 1/89, Table 1)
Rev. C | Page 5 of 16
5 Page 
Data Sheet
ADuM2250/ADuM2251
STARTUP
Both the VDD1 and VDD2 supplies have an undervoltage lockout
feature that prevents the signal channels from operating unless
certain criteria are met. This feature prevents the possibility of
input logic low signals pulling down the I2C bus inadvertently
during power-up/power-down.
For the signal channels to be enabled, the following criteria
must be met:
• Both supplies must be at least 2.5 V.
• At least 40 μs must elapse after both supplies exceed the
internal start-up threshold of 2.0 V.
Until both criteria are met for both supplies, the ADuM2250/
ADuM2251 outputs are pulled high, thereby ensuring a startup
that avoids any disturbances on the bus. Figure 8 and Figure 9
illustrate the supply conditions for fast and slow input supply
slew rates.
MINIMUM RECOMMENDED
OPERATING SUPPLY, 3.0V
MINIMUM VALID SUPPLY, 2.5V
INTERNAL START-UP
THRESHOLD, 2.0V
SUPPLY VALID
MINIMUM RECOMMENDED
OPERATING SUPPLY, 3.0V
MINIMUM VALID SUPPLY, 2.5V
INTERNAL START-UP
THRESHOLD, 2.0V
SUPPLY VALID
40µs
Figure 9. Start-Up Condition, Supply Slew Rate < 12.5 V/ms
CAPACITIVE LOAD AT LOW SPEEDS
The ADuM2250/ADuM2251 are designed for operation at
speeds up to 1 Mbps. Due to the limited current available on
Side 1 operation at 1 Mbps limits the capacitance that can be
driven at the minimum pull-up value to 40 pF.
Most applications operate at 100 kbps in standard mode or
400 kbps in fast mode. At these lower operating speeds, the
limitation on the load capacitance can be significantly relaxed.
Table 12 shows the maximum capacitance at minimum pull-up
values for standard and fast operating modes. If larger values for
the pull-up resistor are used, the maximum supported capacitance
must be scaled down proportionately so that the rise time does
not increase beyond the values required by the standard.
40µs
Figure 8. Start-Up Condition, Supply Slew Rate > 12.5 V/ms
Table 12. Side 1 Maximum Load Conditions
Mode
Standard
Fast
Standard
Fast
VDD1
5
5
3.3
3.3
Data Rate (kbps)
100
400
100
400
Maximum Capacitive Load for Side 1
tr (ns)
tf (ns)
1000
187
300 172
1000
270
300 235
R1 (Ω)
1600
1600
1000
1000
CL1 (pF)
484
120
771
188
Rev. C | Page 11 of 16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet ADUM2250.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ADUM2250 | (ADUM2250 / ADUM2251) Dual I2C Isolators | Analog Devices |
| ADUM2251 | (ADUM2250 / ADUM2251) Dual I2C Isolators | Analog Devices |
| ADuM225N | 5.0 kV RMS Dual Channel Digital Isolators | Analog Devices |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |