Q&A - Recent Threads

AD5522 Temperature Range for each Model

TrashBoat — Tue, 17 Feb 2026 06:50:21 GMT

Hi experts

What's the difference between AD5522JSVUZ-RL and AD5522JSVUZ,temperature range shows different.

Which range is correct ?

SPICE model of ADG738

tono — Mon, 16 Feb 2026 18:17:32 GMT

Is it possible to get a SPICE model for the ADG738?
I'd like to simulate it somehow.

ate

xiaorenwu — Thu, 29 Jan 2026 00:45:05 GMT

ate

AD5522 Leakage Current Specification

PiR — Sat, 24 Jan 2026 16:24:22 GMT

Hi,

The AD5522 datasheet specifies a "combined leakage at DUT" of 15 nA to 25 nA (Rev. F, page 8). Based on the rows above this one, it appears that this value is "measured with ±11 V stress applied to pin, switch off".

Could you please clarify in more detail the test conditions used for this specification ?

I attempted to measure the leakage current by applying 10 V to the output of a channel while the channel was disabled. In this case, I measured a current of about 125 uA, which is far from the value specified in the datasheet.

My setup was as follows:

AD5522 configured using the evaluation board and evaluation software
Output voltage is 1 V and channel disabled
Measurement repeated using direct SPI commands (same result)
Current measured using a Keithley 2450 SMU connected to the "gold pins" labeled RDUT1 on the evaluation board schematic

I also repeated the measurement at 1 V, which resulted in a current of 2.8 uA. These currents change little with each channel or with the reference voltage (5V or 2.5V).

If the "combined leakage at DUT" specification (or the other leakage specifications above in the table) does not correspond to the leakage current when the channel is disabled, could you please clarify what this specification represents and, if available, provide the expected leakage current for a disabled channel ?

Best regards.

What is GRDALM standing for?

Stitch — Wed, 14 Jan 2026 08:24:32 GMT

Hola

What is GRDALM standing for by Alarm setup register, 0x06? No information in the datasheet? How is it triggered by event?

AD5522 Datasheet Calibration Example (error?)

PiR — Sat, 13 Dec 2025 11:08:08 GMT

Hi,

In the calibration example (Rev. F, page 39), where does the “10.25” come from? Shouldn't it be 11.25 (22.5 / 2)?

Best regards

ad5522 with AVDD+12V AVSS-12V FOH & MEASOUT output does‘t match in FIMV mode

lastsword — Wed, 10 Dec 2025 01:37:54 GMT

Hi:

Ad5522 avdd=12V, avss=-12V, vref=5V, configed as FIMV mode, force current = -100uA, current range = 200uA, FOH = -500mV, but MEASOUT = 1912mV, according to datasheet, MEASOUT shoule be 2150mV. However, when avdd = 15V, avss=-15V, MEASOUT was correct (around 2150mV). Should I adjust software config or something else?

AD5522 High-Z FOHx Current

baggio — Thu, 04 Dec 2025 12:18:26 GMT

I am testing with the following settings.

　１，First, I set 0x003A A080.

　 (High-Z FOHx current / Disable the always on mode for the external current range buffer1 .)

　２，Next, I set 0x0039 2080.

　　　(High-Z FOHx current / ±200 µA current range.)

　３, AVSS Change -15V → -5V

　４, AVDD Change 16V → 27V

　５，Next, I set 0x0029 2080.

　　　(FI and voltage clamp)

During this test, I am observing the EXTFOH waveform. When performing No. 3 and No. 4, changes are visible in the output waveform even though EXTFOH is disabled.

I originally thought this would not change, so I would like to try to improve it.

Is there anything missing in the settings?

The test environment is as follows.

The acquired EXTFOH waveform is also expanded.The top waveform is EXTFOH.

Best Regards.

Is there any read device ID or read ID commands for AD5560 chip using SPI interface

Jagan18 — Mon, 17 Nov 2025 02:09:05 GMT

We have started interfacing AD5560 Eval board to external controller, is there any Read ID or Device ID commands. in datasheet i didn't found as such.

What is the drift spec of AD5560 Force & Measurement?

Stitch — Thu, 13 Nov 2025 01:58:13 GMT

Hola

I couldn't figure out the relevant info from AD5560 datasheet. Could you help me understand waht is drift over hours of AD5560 Force Voltage, Measure Voltage & Measure Current?

Eval board read ID

armmic — Thu, 11 Sep 2025 14:40:07 GMT

Hi,

Greetings!

We are using the default software provided by AD for the Eval board. (version 1.6.0).

The power supply is as per your wiki page

User Guide for the AD5560 Device Power Supply (DPS) with DACs [Analog Devices Wiki]

Question1 : We always get a READ Silicon Rev ID as "000000". Is that expected?

Question 2: Also, we are not able to toggle the PD bit in the System Control Register. Is there any debug procedure available to ensure we are not missing anything while trying to bring up the board?

Regards

AD5522 ADC selection (maximum sampling frequency)

PiR — Fri, 22 Aug 2025 21:18:58 GMT

Hello,

I would like to know the maximum meaningful sampling frequency for the ADC for the voltage/current measurement outputs of the AD5522.

My understanding is that the shortest event the ADC can capture is limited by the bandwidth and settling time of the AD5522’s internal measurement amplifiers. In other words, it does not make sense to use a very fast ADC if the amplifiers themselves are slow. For example, if the fastest change at the MEASOUTx pins is 1 ms (i.e., the MEASOUTx pins voltage can only change every 1 ms due to internal signal paths), then using a 1 MHz ADC would not provide any benefit.

Could you please confirm whether this reasoning is correct, and if so, suggest what would be a reasonable maximum sampling rate for the ADC ?

Regards,

AD5522 Evaluation board and External ADC

PiR — Tue, 19 Aug 2025 09:12:12 GMT

Hi,

The AD5522 evaluation board directly connects the output of the MEASOUTx pins to the AD7685 ADC, without any ADC driver.

However, the datasheet of the AD7685 ADC recommends using a driver and (optionally) an input filter.

Are the driver and filter not required with the AD5522 ?

Thanks

Designing Constant current source to run magnetic coils

gautamM — Thu, 24 Jul 2025 01:33:21 GMT

Hello,

I would like to know if I can use AD5560 with EXTFORCE1 or EXTFORCE2 as a constant current source to run mangetic coils. The coil have roughly 60ohm, 66mH. The max current I would need is 200mA. I have tolerance of 20uA on the set current.

Regards,

Gautam M.

Operation outside operating range

IndusKen — Fri, 13 Jun 2025 00:14:57 GMT

Hi,

We are developing a product based on the ADATE320. In the final product the ADATE320 will typically operate at 80Deg C, measured at the package surface. Junction temp will be even higher.

We understand we can use the internal offset and gain compensation to correct any measurements due to temperature.

Do you have any data points or performance specification taken at temperatures above the recommended operating temp? Which specifications will be the first to be impacted at temperatures above 75Deg C?

Any feedback or help regarding operation outside the specified range is very much appreciated

Ken

AD5522 Evaluation software 1.6 cant download

embededlinux — Wed, 04 Jun 2025 00:18:44 GMT

User Guide for the AD5522 Evaluation board [Analog Devices Wiki]

to adi engineer：

the AD5522 Evaluation software - Version 1.6 can not downoad

how can i download it？

AD5522 LTC6090 扩压扩流电路问题

sqqdjian — Fri, 30 May 2025 16:15:20 GMT

参考ADI的解决方案，利用AD5522作为主控，在EXFOH后接LTC6090作为放大器，设计了12倍和1.2倍两档，再之后利用MOSFET推挽电路对LTC6090的输出进行电流放大，LTC6090放大电路参考下图。

然后通过多个Shunt电阻对电流采样，采样电路使用LTC6090作为跟随器，后接高共模差分运放将Shunt电阻两端的压差回送到AD5522的EXMEASIH端，EXMEASIL端接地，实现电流反馈。类似的，Shunt电阻后端接DUT到地，对DUT两端使用跟随器采样电压并进行放大倍数等比缩小后，送入差分放大器回送到AD5522的MEASVH端，实现电压反馈。

现在的问题是：

1. 在进行FV输出时，电路极不稳定，输出DC波形变得类似正弦波，后调整AD5522的CCOMP电容到33nF，同时在LTC6090的反馈电阻并联pF电容后，空载FV基本能稳定，想请问是何原因导致电路的振荡。

2.在进行FI输出时，输出电流低于50mA时，看起来输出正常，但是输出电流到60mA时，前一段时间输出正常，AD5522的输出也是正常电压，不久后示波器观察输出端电压，发现变为类似方波的波形，此时的AD5522输出达到满偏，而输出电流达到80mA时，输出直接就是方波，AD5522输出也是满偏，想请问这是什么原因造成，如何解决这个问题。

以上问题还请帮忙解惑，万分感谢！

What is the impedance of AD5560 output impedance & sense input impedance per V/I ranges?

Stitch — Thu, 29 May 2025 09:15:27 GMT

Hola

I couldn't figure out the relevant info from AD5560 datasheet. Could you help me understand waht is the output impedance & sense input impedance per E/I ranges?

Evaluation board support for Windows 11

IDCM — Wed, 14 May 2025 05:54:17 GMT

Hello,

We just acquired some evaluation boards for the AD5560. We noticed the software is only supported up to Windows XP. Is there a version we can get that supports Windows 11?

Would it also be possible to get C / baremetal libraries?

Thank you in advance!

MEAS*OUT output pins

DariuszA — Mon, 12 May 2025 08:02:17 GMT

Hi,
we are looking into using AD5520 ( although we are considering AD5522, both have pros and cons) and there is one information I cannot find in datasheet. Are the MEAS*OUT outputs buffered inside the chip or not? Block schematics seems to suggest there outputs are directly (or via analog switch in case of MEASOUT). Are there any recommendations how close to ADC should be located to the AD5520. I guess my question is if any noise injected on those lines will affect chip performance?

Offset DACX

oki.developer — Mon, 05 May 2025 19:06:15 GMT

Hi,

I am using AD5522 FIMV mode.

I need DAC output voltage 0-22.5 instead +/-11.25.

I think i need to set Offset DAC code 0x0000 instead 0xA492.

My question is should I set Offset DAC code for all PMU channel or just whole PMU wide.

I think I should write 0x01C00000 for channel 1 correct?

Even if the Pogo pin of CH1 and CH2 does not contact the bottom's PAD, when I check the sense pin, I would like to know why the value of MV is output as 5V because 5V is output.

jpaulhwang — Tue, 08 Apr 2025 23:52:23 GMT

We have the following test setup using the AD5522:

1. From the AD5522 channels, CH1 is used for Force and CH2 is used for Sense.

2. CH1 and CH2 are not physically connected; they are connected via separate pogo pins. Each pogo pin connects to a corresponding pad on the Bottom Board.

3. On the Bottom Board, the pads for CH1 and CH2 are shorted together.

4. To check if the pogo pins of CH1 and CH2 are making proper contact with the pads on the Bottom Board, we apply FV = 5V and monitor the result through MV.

However, the issue is that even if the pogo pins of CH1 and CH2 are not properly contacting the Bottom Board pads, the Sense pin still shows 5V, and MV reads 5V as well.
This makes it difficult to detect whether contact is good or not.

We observed the same result when testing with the AD5522 evaluation board.

What could be the cause of this?

If the Force and Sense pins are not shorted together, applying 5V to the Force pin usually causes oscillation due to an unstable feedback loop.
However, in this case, strangely, the Sense pin still outputs a stable 5V when monitored through MV.

As a result, both the Sense and Measure Out show 5V without any oscillation.

Passage characteristics of MEASVH to MEASOUT

baggio — Mon, 07 Apr 2025 10:39:37 GMT

Hello. I have a question about the waveform shown below.

This waveform shows MEASVH (CH2 light blue) and MEASVOUT (CH4 green) and is the waveform seen on the AD5522 pin.

SR=2V/us for MEASOUT spec of AD5522, but from the waveform it does not appear to be met.

Is this a characteristic of the AD5522's internal amplifier?

What could be the reason why MEASOUT cannot follow the input waveform?

The measurement enviroment is as follows.

Best regards.

What's the maximum current can go through the SYS_FORCE pin path of AD5522?

Jack1234 — Thu, 20 Mar 2025 13:14:02 GMT

Hi Experts,

I would like to know the maximum current can go through the SYS_FORCE pin path of AD5522.

The datasheet only mentions it's a 60ohm switch, but there is no spec about maximum current through it, I guess it's less than 20mA?

Thank you in advance.

Schematic verification

Gregory007 — Fri, 14 Mar 2025 10:36:49 GMT

Hi everyone, and thank you in advance for your advice.

I was able to test the EVAL-AD5522 test board with an ESP32 and MicroPython code I developed. It worked correctly.

Then I developed a board with an AD5522JSVUZ and an STM32H7, but it wouldn't work. I have nothing on the AD5522 outputs. So I pulled some wires from the SPI communication to reconnect the ESP32 and test the code that worked on the EVAL-AD5522 board. The only difference is the /LOAD pin, which I permanently set to GND.

I still have nothing on the AD5522 output of my board.

Here are the tests I performed:

- I have SPI communication from my card and I was able to compare it with the AD5522JSVUZ card = OK (I checked that the CS goes to 0 before the frame and that the frame sampling is done on the falling edge)

- When I set a REST (1-0-1), the BUSY pin changes and stays at 1

- When I send a message, the BUSY pin never changes = this is not normal

On my schematic:

IC1 => IO0 to IO3 are output and at 0, IO4 cycles 1-0-1 at startup, IO5 is an input

All SBs are connected and the power supplies are checked.

I'm sending the following message at startup:

0x003FE4A0
0x0F21B300

Then, I want to force a voltage of 4 volts on all outputs and measure a current of up to 2 mA.

0xF219300
0xfcdad83

I was able to verify the messages with the software from the EVAL-AD5522 board.

Is there an error in the schematic that's causing this not to work? Are the frames I'm sending the wrong ones (they're the same frames with the ESP32 that worked on the test board)?

What other tests can I do to verify the operation of the AD5522 on my board?

ez.analog.com/.../AD5522.pdf

Thank you again for your support.