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Interface and Isolation
ADuM4160 wiring with uC
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ADG324x Level Translation: high to low
ADM2687 Emission Problem
ADN4695E bus termination in a point-to-point topology
ADuM for >2kV voltage
ADuM iCoupler: what is the inductance value of the internal coils?
ADuM iCouplers immunity to magnetic fields
ADuM1100 glitch filter window vs. very narrow pulses
ADUM1100: Different supply voltage
ADuM1100: Disfunction - burning out
ADuM1100: Overvoltage when the output is shorted out
ADUM1200/ADUM3401: Compliance with 3rd Ed IEC 61010-1 certification (2014)
ADuM1200: Supply current
ADuM1200: What is the input impedance of a single channel?
ADUM1201 suitable to work in CAN Bus?
ADuM1250 detect levels scale with the supply
ADuM1250 failure in hot-swapping application
ADuM1250 Side1 minimum levels
ADuM1250: tips to reduce power consumtion in a battery application.
ADuM1251 max permitted voltage for IEC 61010 reinforced
ADuM1251: Flash testing limits
ADuM1251: Vol issues with non standard I2C applications
ADUM1300: Can I connect the unused (No Connect) pin 7 of a ADuM1300 iCoupler to GND?
ADuM1301 Output current capability
ADuM1301: Default output state on power up
ADuM1400: Absolute maximum ratings
ADUM1400: maximum input rise time & input/output protection
ADuM1400_ UL flammability rating
ADUM1401: Can I increase max data rate to 2Mbps and will this compromise pulse width distortion spec ?
ADUM1401: I/P maximum voltage
ADUM1401: Is it possible to disable the refresh pulses on the iCoupler?
ADuM1401: Low supply voltage
ADuM1401: SPI wires
ADuM1402: Can it be modified to same configuration as the I2C isolator ADUM1250 ?
AduM1402: Tristate outputs
ADuM1402: Is there any specified or typical jitter performance?
ADuM1420: Maximum switching frequency is given as 5Mbps in datasheet, should this be 5MHz?
ADuM144x Low Power Digital Isolators: I set EN1 and EN2 high to disable the internal refresh and watchdog for lowest operating power. Is DC correctness guaranteed in this state?
ADuM144x Low Power Digital Isolators: Must the EN1 and EN2 pin states match one another?
ADuM144x Low Power Digital Isolators: What is the glitch filter width of the ADuM144x family?
ADuM144x Low Power Digital Isolators: What is the refresh frequency of the ADuM144x family?
ADuM144x Low Power Digital Isolators: What input voltage levels are recommended?
ADuM144x Low Power Digital Isolators: What's the Difference between ADuM1440/41/42 and ADuM1445/46/47?
ADuM2400 input current test
ADuM2400: 12 V digital signal
ADuM2401 driving long cable
ADuM2401 output driving 2m cable
ADUM2401: Common mode voltage
ADUM3070 Creepage and Air Clearance specifications
ADuM3160 for USB isolation
ADuM3160 USB speed and compatibility
ADuM3160 with USB2.0 & 3.0
ADuM3160, using Vdd1/Vdd2 to supply external current
ADUM3160/4160: Can this device be used for USB-IF standard host isolation
ADUM3160: Can I use the Vdd1 and Vdd2 to supply current to other circuits on the board
ADuM3190 FAQ: Why does the ADuM3190 have 2 Error Amp Outputs?
ADuM3190/4190 isolated error amplifier be used as an isolation amplifier?
ADuM3210TRZ-EP for mil/aero apps
ADuM3220 starting delays
ADUM3220: There is no Junction to Ambient thermal resistance given in datasheet
ADuM3220: What is the practical use of the two Junction to Case thermal resistance values?
ADuM3223 in H-bridge
ADuM3223 vs ADuM3220
ADUM3230 at low frequency
ADuM3470 efficiency over temperature range
ADuM3470 with VDD1>VDDA
ADuM3470: thermal derating
ADuM3480 datasheet questions/corrections
adum3482 optoisolator and power pin permutation query
ADuM4070 with high input voltage and 3.3V 1A output
ADuM4160 PIN input
ADuM4160 wiring with uC
ADuM4160 with SMSC USB2514B
ADUM4160/ADUM3160: Can these devices support OTG (On The Go) USB?
ADUM4160/ADUM3160: Is there a difference between the upstream and downstream port?
ADUM4160/ADUM3160: What is the difference between these 2 USB isolation devices?
ADuM4169: Powering VBUS1 from 5V and VBUS2 from 3.3V.
ADuM4223 for safety class II
ADuM4472 isolation performance for IEC 60601-1
ADuM5000 DC-DC shutdown
ADUM5000s in parallel and in series connection possible
ADUM5010, ADUM6010 - All channels at maximum data rate
ADUM5010, ADUM6010 - AN-0971
ADUM5010, ADUM6010 - Creepage
ADUM5010, ADUM6010 - Data shut down
ADUM5010, ADUM6010 - Operating isoPower converter and data channels at different voltages
ADUM5010, ADUM6010 - Overload protection
ADUM5010, ADUM6010 - Putting two parts parallel
ADUM5010, ADUM6010 - Stacking isoPower outputs
ADUM5010, ADUM6010 - Synchronization isoPower PWM signal with external source
ADuM52001: Vsel input current and threshold voltage
ADUM5201: Is it possible to switch the isolated Voltage off, by setting Ve2 to low?
ADuM5230 no output voltage (Viso)
ADuM5230 PWM inputs hysteresis.
ADuM5241 overvoltage protection
ADuM5241: What output impedance can we expect in Z state when Viso is unpowered?
ADuM5241: Application hints for addressing EMC problems in order to pass CE test?
ADuM5401: How do I connect PIN 7 (RCout) of ADuM5401 in a standalone application?
ADuM5401: Is 1 Mbps the maximum data rate, can this device be used above 1 Mbps?
ADuM5401: Is the integrated DC/DC converter capable of boosting a 3.3V input to 5V output?,
ADUM5401WCRW vs ADUM5401WCRWZ-1: What is the difference?
ADuM5402 input behavior
ADUM5402: 5V supply disturbed by device's DC/DC converter.
ADuM5402: EMI layout recommendation
ADuM5403: maximum junction temperature is not provided in datasheet
ADuM540x: Automotive version available?
ADuM54xx and ADuM64xx: Startup Problems
ADUM54xx: Can I make parallel connection of devices in a redundancy configuration?
ADuM54xx: recommendations on how to put 2 ADUM54xx in parallel?
ADuM6000 and RCin/RCsel High Level thresholds
ADuM6132 Power Consumption
ADuM6132 to drive 1200V IGBT
ADuM6400 specs changed
ADuM6400: PCN # 11-0188 typo error
ADuM6401 and common mode transient immunity
ADuM6402 VDDL input pin connection
ADUM7234: Is max storage temperature in datasheet same as max junction temperature?
ADUM7234: Why is maximum output differential voltage only 350V and what happens if it is exceeded?
ADuM7324: Why is the working voltage only 350V and what happens if it is exceeded?
ADuM: Are iCoupler products sensitive to external magnetic fields?
ADuM: Can you explain in more detail the DC correctness paragraph in datasheet?
ADUM: difference between ADuM1402ARWZ and ADuM1402WSRWZ
ADuM: Internal overvoltage protection
Are there any side effects when one side of the digital isolator is powered up while the other side is powered down?
Can ADUM3440 be used to provide Isolation from high frequency noise?
Can I use the ADuM3190/ADuM4190 as an isolated op amp to convert a 4-20mA signal and how would it work?
Can the ADuM1250 drive a 25 metre line?
Can you expalin the difference in ESD protection between the ADuM240x and the ADuM440x icoupler parts?
Certificates for the Safety and regulatory approvals for ADuM4190
Common-Mode voltages on ADuM3070 / ADuM4070
CTRL Pins on ADuM3482
Difference between ADuM2401 v ADuM4401
difference between the ADuM3190 and the ADuM4190
Digital Isolators with Op Temp range starting at -55C
ESD protection level
EVAL-ADUM4160 physical dimensions
FAQ: AD5700/AD5700-1 & Full Duplex Operation
FAQ: Where can I find more information on the combination of the AD5700, AD5421 & ADuCM360 as a smart transmitter circuit?
Generating 3 Voltages with ADuM347x
glitch filter width of the ADuM144X family?
How much output current can I get from the COMP pin of an ADuM3190/4190?
How to use ADuM4223 in Full Bridge driver application?
I set EN1 and EN2 high to disable the internal refresh and watchdog for lowest operating power. Is DC correctness guaranteed in this state?
If I don't use the ADuM3190/4190 as an isolated error amplifier, what is the gain of the output?
input voltage levels are recommended?
INTERFACE AND ISOLATION SUPPORT COMMUNITY
Is ADuM6000 (or ADuM5000) compliant with the USB low power suspend mode current limits?
Is figure 14 application example in ADUM1230 datasheet also valid for ADUM1233?
isoPower FAQ: Can I put two parts in parallel for more power?
isoPower FAQ: Can I run all of the data channels at maximum data rate simultaneously?
isoPower FAQ: Can I stack isoPower outputs to make higher voltages?
isoPower FAQ: Can I synchronize the isoPower PWM signal with an external source?
isoPower FAQ: Can the isoPower converter and the data channels operate at different voltages?
isoPower FAQ: Can the isoPower converter step up voltage?
isoPower FAQ: Do I need to follow the recommendations of AN-0971 to achieve EMI emissions targets?
isoPower FAQ: Does the data shut down when the isoPower is disabled?
isoPower FAQ: Is there overload protection in the ADuM5x1x and ADuM6x1x products?
isoPower FAQ: The creepage is smaller on the new isoPower devices than the other isoPower products in the SOIC_W package. Will this limit me?
Isopower for -55C?
Maximum junction temperature
Mesaure AC Line Current (230V AC)
Military spec digital isolators
MLVDS FAQ: Are simulation models available?
MLVDS FAQ: Do you have an evaluation board?
MLVDS FAQ: How is M-LVDS different to RS-485?
MLVDS FAQ: What is M-LVDS?
MLVDS FAQ: What is the difference between receiver type 1 and receiver type 2?
MLVDS FAQ: Why should I use a 100Mbps device instead of a 200Mbps device?
MOPP at 250Vrms
More precise phase shift data than that shown in Figures 30 and 31 in Datasheet?
MTBF/FIT data of ADuM2402
Must the EN1 and EN2 pin states match one another?
On EVAL-CN0313 there are three different circuits that offer various protection levels for IEC61000-4-2 ESD, IEC61000-4-4 EFT and IEC61000-4-5 Surge. Why is there different protection circuitry used for Surge Level 4 compared ESD/EFT level 4?
Power calculation for ADuM3070
Pullup voltage for port 1 signals diferent from Vdd1
RE: Split Isolated Supply with isoPower query(SR#: 1204350)
soldering temperature and soldering time
Solution to limit overshoot on ADuM5401
SPIsolator(TM) - What is a SPIsolator?
Switching regulator with an integrated coil
switching regulator with integrated coil
UL flammability ratings
WG: ADUM5202 consistent with VDE Norm?
What does the 1% accuracy of the ADuM3190/4190 include?
What exactly was changed from the original version of ADuM5402W to the ADuM5402W-1?
What is the current transfer ratio of the ADuM3190/4190 and how much can this change over temperature and from part to part?
What is the Gain Bandwidth product of the ADuM3190/4190?
What is the refresh frequency of the ADuM144X family?
What's the difference between the ADuM1440/41/42 and the ADuM1445/46/47?
Why do the ADuM3190 and ADuM4190 have two error amplifier outputs
Why is the ADuM3190/4190 supply voltage range different than the operating voltage range?
Why is there a minimum power on slew rate of 400V/ms on ADuM5230?
Will there be dual versions of the ADuM144X family
ADuM4160 wiring with uC
In a current design of a medical device, i have to establish an isolated USB
connection between a PIC microcontroller and a host and I intend to use the
ADuM4160 for that purpose. My microcontroller therefore serves the role of an
USB 2.0 USB device.
However, I have some questions about the correct wiring/usage of some pins
between ADuM4160 and the microcontroller (PIC18F2550 / dsPIC33Exx).
1.) How to use the internal pullups of ADuM4160 together with pullups availabe
integrated into the microcontroller?
If I have understood the PIN input functionality correctly, the (ADuM-)internal
pullup serves two purposes: It is first used for signaling attachment to the
host. The internal uC pull-up can’t be used for this anymore because of the
isolation barrier and thus I have to use the PIN pin to enable the pull-ups on
the other side of the isolation barrier. That point is clear so far.
a.) The other thing the (uC or ADuM-)internal pull-ups can do is create the
idle state of the bus.
It isn’t clear to me if the internal pull-up in the ADuM4160 is required or not
in this case.
b.) The datasheet refers to lots of “smarts” and “control logic” that determine
the state of the isolation drivers. The microcontroller needs to see the idle
state and not the reset state. If the isolator control logic doesn’t allow the
idle state to be pushed back to the micro, then if I disable the internal micro
pull-ups, the device would not work. If the isolator does push the idle back to
the device, then I should be able to disable the internal pull-ups. Could you
give me an advice on how to use the PIN controlled pullup of the ADuM correctly
together with the micro-controller internal pullups?
2.) Powering the isolator (VBUSx)
a.) I want to use the micocontroller in a self-powered scenario, but the
upstream side of the isolator should derive its power from VBUS voltage of the
USB bus. Therefore, I use the following "voltage-setup" on the upstream side of
the Isolator: SPU, PDEN, VBUS1 as well as VDD1 are all connected to VBUS of the
The question on the upstream side is: The datasheet notes that it is possible
to supply this side by only 5V on VBUS1 and Vdd1 open (internal regulator
establishes 3V3 on VDD1) or apply 3.3V on both VBUS1 and VDD1. It is also ok to
connect both VBUS1 and VDD1 to 5V as I described above?)
b.) Concerning the downstream side and usage of the PIN input:
Since the upstream side is powered from VBUS and the Isolator draws some
current from the bus, the USB spec says that I have 100ms time-span from the
time instance at which VBUS is established to pull the PIN high.
c.) I should not have PIN tied high when it is not connected to the bus. If I
connect PIN to the Vdd2 pin and VBUS2 to the VBUS of the USB port, I will meet
both requirements, but this is useless since I loose the isolation property If
i power both sides of the isolator by VBUS, right?
Therefore, I would run both VBUS2 and VDD2 pins on an seperated, device-side
3V3 supply. But how should i operate the PIN line?
d.)(If the peripheral would be comlpetey self-powered and draws no power from
the USB power, then i could set the PIN via the microcontrolelr at any time as
long as VBUS is detected, but since i supply the isolator upstream side via
VBUS of the USB port, I have to respond in time!?)
a.) The ADuM4160 can be thought of as creating two separate USB busses, one on
each side of the barrier. Each of these busses must have a pullup connected to
the appropriate data line to give the correct idle state and pull downs on both
lines to make sure that disconnected lines are pulled down properly. So the uC
can use its internal pullups and the downstream port of the ADuM4160 will
provide the pull downs.
b.) In the upstream side of the ADuM4160, we have internal pullups under the
control of SPU and PIN. SPD determines some buffer parameters and controls
which line is connected to the pullup. PIN will apply the pullup when it is
high. This allows the enumeration to be controlled with a logic pulse from the
downstream side. PIN can be either tied high or connected to a GPIO port on the
uC. It also allows the peripheral to force a re-enumeration by pulling PIN low
and the taking it high again. It looks to the host like the cable was
disconnected then reconnected.
a.) No, this will not harm the ADuM4160, but it will cause the I/O voltages to
have a 5V logic. This is not allowed by the USB standard.
b.) This is the time that the uC is allowed to answer the host. If the uC is
not pulling PIN high, then the host still thinks the cable is unplugged so
there is no time limit. It is 100uS from the time that D+ is pulled high by the
c.) Most customers simply tie the lines high. VDD1 to PDEN, and SPU and VDD2 to
SPD, and PIN and the USB works fine. The ADuM4160 will pull DD+ and DD- low
then to idle when side 1 has no power, side 2 goes to idle and wait till the
host pulls D+ and D- low to start enumeration. The enumeration process will
reset the interface when a cable with power is applied.
d.) No, the processor will detect the pullup as soon as the cable is inserted
and try to enumerate, this will be passed to the uC and it will reset and
enumerate. We have found very few instances where it is vital to know that
there is bus power. If you must know, use a Darlington optocoupler as a Vbus
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