IsoLoop
IL600-Series Isolator
Evaluation Board
®
Board No.: IL600-01
NVE Corporation
(952) 829-9217
iso-apps@nve.com
www.IsoLoop.com
www.nve.com
About This Evaluation Board
The IL600-Series Isolator evaluation board lets you try a variety of NVE’s unique IL600-
Series Isolators.
The board has four isolators in four package types:
• IL613E (wide-body SOIC-16)
• IL614-3E (narrow-body SOIC-16)
• IL611-3E (SOIC-8)
• Open-drain IL610A-1E (MSOP-8)
A pushbutton and LED demonstrate the remarkable flexibility of these devices.
Award-winning IL600 and IL600A Isolators provide unique passive inputs for flexibility
similar to LED-input optocouplers but with better performance and higher package density.
The devices are manufactured with NVE’s patented IsoLoop spintronic Giant Magnetoresistive
(GMR) technology for small size, high speed, and low power.
IL600-Series Specification Highlights
• Up to 100 Mbps Data Rate
• Wide Input Voltage Range
• Open Drain or CMOS Outputs
• Fail-Safe Output
• 3.3 V or 5 V Power Supply
• No Input-Side Power Supply Required
• 100 ps Pulse Jitter
• Low Power Dissipation
• Low EMC Footprint
• 2.5 kVrms Isolation (1 min.)
• 25,000 Year Barrier Life
• UL1577 and IEC61010 Approved
• MSOP, SOIC, and PDIP Packages
NVE Corporation
(952) 829-9217
iso-apps@nve.com
www.IsoLoop.com
www.nve.com
Evaluation Board Layout
Inverting input
configuration
47 nF decoupling
capacitors as close
as possible to VDD
pins
Jumpers power the
selected isolator(s)
Input resistors
(249 Ohms for
approx. 8 mA
at 3.3 V input)
Boost capacitors for
single-ended input
(16 pF for standard
logic)
Non-inverting input
configuration
Pushbutton powers
input to turn on
LED on the output
Devices without “A”
suffix have CMOS
outputs (“A” suffix
means open drain)
Output enable
jumper
Open-drain output
(limited swing due to
LED voltage drop)
LED driven by an
open-drain output
NVE Corporation
(952) 829-9217
iso-apps@nve.com
www.IsoLoop.com
www.nve.com
Evaluation Board Schematic
VDD2
IN1
IN2
IN3
GND1
VDD1
1
3
1
5
4
7
6
16
-
+
-
+
-
+
14
13
10
OUT1
OUT2
OUT3
IL613E
VDD2
3
4
5
6
-
+
-
+
16
14
13
11
OUT1
VOE
IN2
IN1
OUT2
OUT3
IN3
7
-
+
IL614-3E
VDD1
2
-
+
-
+
8
7
6
VDD2
OUT1
OUT2
IN1
IN2
1
4
3
IL611-3E
VDD1
VDD2
IN
3
2
-
+
8
7
6
5
VOE
249R
OUT
GND1
IL610A-1E
Isolation
Boundary
GND2
All resistors = 249 Ohms
Boost capacitors = 16pF
Supply decoupling capacitors = 47nF
NVE Corporation
(952) 829-9217
iso-apps@nve.com
www.IsoLoop.com
www.nve.com
Device Operation
IL600-Series Isolators are current mode devices. Changes in current flow into the input coil
drive output logic state changes.
The output is high with no signal present. Current flow from In- to In+ switches the output
low. The worst-case logic low threshold current is 5 mA. An input current of at least 8 mA
ensures fail-safe operation, meaning the output powers up in the correct state. The absolute
maximum coil current is 25 mA.
The evaluation board has examples of inputs configured as inverting and non-inverting:
+V
V
DD
+V
V
DD2
C
boost
R
limit
C
boost
R
limit
-
+
-
+
GND
1
GND
2
GND
1
GND
2
Inverting Configuration
Non-inverting Configuration
For single-ended operation (that is, the coil current does not reverse), a boost capacitor in
parallel with the current-limiting resistor is used to induce bidirectional coil current. For
standard logic signals with rise times less than 10 ns,
+V
a 16 pF boost capacitor is recommended. The
R
limit
capacitor should be larger for slower rise time inputs.
The isolators can also be used with differential inputs
as shown in the figure at right. No boost capacitor is
needed if the coil current reverses in this
configuration. Unlike optocouplers, the input current
can be negative without reverse bias protection.
There is no limit to the input voltage as long as the
input current is limited.
GND
1
V
DD
-
+
GND
2
Differential Configuration
NVE Corporation
(952) 829-9217
iso-apps@nve.com
www.IsoLoop.com
www.nve.com
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