ADUM3300BRWZ Analog Devices Inc, ADUM3300BRWZ Datasheet - Page 17

• Manufacturer Part Number: ADUM3300BRWZ
• Description: IC DIGITAL ISOLATOR 3CH 16-SOIC
• Manufacturer: Analog Devices Inc
• Series: iCoupler®r

Specifications of ADUM3300BRWZ

• Propagation Delay: 32ns
• Inputs - Side 1/side 2: 3/0
• Number Of Channels: 3
• Isolation Rating: 2500Vrms
• Voltage - Supply: 2.7 V ~ 5.5 V
• Data Rate: 10Mbps
• Output Type: Logic
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Operating Temperature: -40°C ~ 105°C
• No. Of Channels: 3
• Supply Current: 7mA
• Supply Voltage Range: 2.7V To 5.5V
• Digital Ic Case Style: SOIC
• No. Of Pins: 16
• Operating Temperature Range: -40°C To +105°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATION INFORMATION
PC BOARD LAYOUT
The ADuM330x digital isolator requires no external interface
circuitry for the logic interfaces. Power supply bypassing is
strongly recommended at the input and output supply pins (see
Figure 14). Bypass capacitors are most conveniently connected
between Pin 1 and Pin 2 for V
Pin 16 for V
and 0.1 μF. The total lead length between both ends of the
capacitor and the input power supply pin should not exceed
20 mm. Bypassing between Pin 1 and Pin 8 and between Pin 9
and Pin 16 should be considered unless the ground pair on each
package side is connected close to the package.
In applications involving high common-mode transients, care
should be taken to ensure that board coupling across the
isolation barrier is minimized. Furthermore, the board layout
should be designed such that any coupling that does occur
equally affects all pins on a given component side. Failure to
ensure this could cause voltage differentials between pins
exceeding the device’s absolute maximum ratings, thereby
leading to latch-up or permanent damage.
SYSTEM-LEVEL ESD CONSIDERATIONS AND
ENHANCEMENTS
System-level ESD reliability (for example, per IEC 61000-4-x) is
highly dependent on system design, which varies widely by
application. The ADuM330x incorporate many enhancements
to make ESD reliability less dependent on system design. The
enhancements include
•
•
•
•
•
ESD protection cells added to all input/output interfaces.
Key metal trace resistances reduced using wider geometry
and paralleling of lines with vias.
The SCR effect inherent in CMOS devices minimized by
use of guarding and isolation technique between PMOS
and NMOS devices.
Areas of high electric field concentration eliminated using
45° corners on metal traces.
Supply pin overvoltage prevented with larger ESD clamps
between each supply pin and its respective ground.
V
GND
GND
V
IC/OC
Figure 14. Recommended Printed Circuit Board Layout
DD1
V
V
V
NC
E1
IA
IB
1
1
DD2
. The capacitor value should be between 0.01 μF
DD1
and between Pin 15 and
V
GND
V
V
V
NC
V
GND
DD2
OA
OB
OC/IC
E2
2
2
Rev. A | Page 17 of 20
While the ADuM330x improve system-level ESD reliability,
they are no substitute for a robust system-level design. See
Application Note AN-793 ESD/Latch-Up Considerations with
iCoupler Isolation Products
board layout and system-level design.
PROPAGATION DELAY-RELATED PARAMETERS
Propagation delay is a parameter that describes the time it takes
a logic signal to propagate through a component. The propagation
delay to a logic low output can differ from the propagation
delay to a logic high.
Pulse width distortion is the maximum difference between
these two propagation delay values and is an indication of how
accurately the input signal’s timing is preserved.
Channel-to-channel matching refers to the maximum amount
the propagation delay differs between channels within a single
ADuM330x component.
Propagation delay skew refers to the maximum amount the
propagation delay differs between multiple ADuM330x
components operating under the same conditions.
DC CORRECTNESS AND MAGNETIC FIELD IMMUNITY
Positive and negative logic transitions at the isolator input cause
narrow (~1 ns) pulses to be sent to the decoder via the transformer.
The decoder is bistable and is, therefore, either set or reset by
the pulses, indicating input logic transitions. In the absence of
logic transitions at the input for more than ~1 μs, a periodic set
of refresh pulses indicative of the correct input state is sent to
ensure dc correctness at the output. If the decoder receives no
internal pulses of more than about 5 μs, the input side is
assumed to be unpowered or nonfunctional, in which case the
isolator output is forced to a default state (see Table 11) by the
watchdog timer circuit.
The limitation on the ADuM330x’s magnetic field immunity is
set by the condition in which induced voltage in the transformer’s
receiving coil is sufficiently large to either falsely set or reset the
decoder. The following analysis defines the conditions under
which this can occur. The 3 V operating condition of the
ADuM330x is examined because it represents the most
susceptible mode of operation.
INPUT (V
OUTPUT (V
IX
)
OX
)
Figure 15. Propagation Delay Parameters
t
PLH
for detailed recommendations on
ADuM3300/ADuM3301
t
PHL
50%
50%