ADUM5240 Datasheet, PDF (1/10 Pages) Analog Devices – Dual-Channel Isolators with Integrated DC/DC Converter, 50 mW

Preliminary Technical Data
Dual-Channel Isolators with
Integrated DC/DC Converter, 50 mW
ADuM5240/ADuM5241/ADuM5242
FEATURES
Integrated isolated DC/DC converter
Regulated 5V/10 mA output
Dual dc-to-10 Mbps (NRZ) signal isolation channels
Narrow body SOIC 8-lead package
High temperature operation: 105°C
Precise timing characteristics:
3 ns maximum pulse-width distortion
3 ns maximum channel-to-channel matching
70 ns maximum propagation delay
High common-mode transient immunity: > 25 kV/μs
Safety and regulatory approvals (pending)
UL recognition
2500 V rms for 1 minute per UL 1577
CSA component acceptance notice #5A
VDE certificate of conformity
DIN EN 60747-5-2 (VDE 0884 Part 2): 2003-01
DIN EN 60950 (VDE 0805): 2001-12; DIN EN 60950: 2000
VIORM = 425 V peak
GENERAL DESCRIPTION
The ADuM524x¹ are dual-channel digital isolators having an
integrated DC/DC converter. Based on Analog Devices’
iCoupler® technology, the DC/DC converter provides up to
50 mW of regulated, isolated power at +5V. This eliminates the
need for a separate isolated DC/DC converter in low-power
isolated designs. Analog Devices’ chip-scale transformer
iCoupler^® technology is used both for the isolation of the logic
signals as well as for the DC/DC converter. The result is a small
form-factor total-isolation solution.
ADuM524x units may be used in combination or with other
iCoupler products to achieve greater channel counts.
The ADuM524x isolators provide two independent isolation
channels in a variety of channel configurations and data rates
(see Ordering Guide) operating off a 5V input supply.
1 _{Protected by U.S. Patents 5,952,849 6,873,065 and 7,075,329 Other patents}
pending.
FUNCTIONAL BLOCK DIAGRAM
V_DD ¹
osc.
rect.
8 _VISO
V_DD ¹
osc.
rect.
8 _VISO
V_DD ¹
osc.
rect.
8 _VISO
V_IA 2
ENCODE
DECODE
7 _VOA
V_OA 2
DECODE
ENCODE
7 _VIA
V_OA 2
DECODE
ENCODE
7 _VIA
V_IB ³
ENCODE
DECODE
6 _VOB
V_IB ³
ENCODE
DECODE
6 _VOB
V_OB ³
DECODE
ENCODE
6 _VIB
GND ⁴
5 _GNDISG_O ND ⁴
5 _GNDISG_O ND ⁴
5 _GNDISO
Figure 1. ADuM5240 Functional Block
Diagram
Figure 2. ADuM5241 Functional Block
Diagram
Figure 3. ADuM5242 Functional Block
Diagram
Rev. PrN
November 17, 2006
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