Q&A - Recent Threads

sot23-6 back side date code MAX6043BAUT50

peterhk77 — Sat, 11 Apr 2026 05:01:28 GMT

I WANT TO KNOW MAX6043BAUT50 SOT3-6 BACK SIDE MARKING IS N5CA - I WANT TO KNOW WHAT IS YEAR WEEK IN THIS MARKING PLEASE HELP TO DECODE THIS MARKING

Request: ADR1001 Official Demo Board Test Data

00yujie — Mon, 23 Mar 2026 12:40:45 GMT

Hi all, could anyone share the test results from the ADR1001 official evaluation board? I’m specifically looking for:

Stability data (Thermal drift plots)

Noise data (Spectrum/FFT and Time-domain plots)

Any insights or shared data would be greatly appreciated. Thanks!

LT1236: configuration of Vin terminal in use of negative voltage output

y_suzuki — Wed, 18 Mar 2026 23:59:48 GMT

Hello,

I have a question regarding the LT1236 precision reference.
There are examples on pages 1 and 9 of the datasheet showing how to generate -10V using the LT1236-10, but the configuration of the Vin terminal differs between these diagrams.
In the example on page 1, the Vin terminal is left open (NC), whereas in the ±10V output example on page 9, the Vin terminal is connected to COM.
Looking at the equivalent circuit on page 11, it seems either configuration would work, but which one is recommended?

Regards,

y_suzuki

max6006 spice model

Patrick707 — Fri, 13 Mar 2026 20:45:51 GMT

Hello All,

Does anyone have a spice model of the MAX6006A? (1uA 1.25V shunt reference)

Patrick

Connecting several LT1460 in series to get high voltages

runcyclexcski — Mon, 09 Mar 2026 17:13:14 GMT

Can one connect the output of several LT1460 (a 10V reference) to get higher voltages? I am looking to get at least 80V.

Thank you in advance!

Temperature sensing transistor configuration

mreich — Tue, 24 Feb 2026 19:07:41 GMT

The ADR1000 voltage reference contains a voltage reference consisting of a zener diode with a series NPN base emitter junction for temperature compensation, a temperature sensing NPN, Q2, and a heater resistor. The data sheet includes a 'typical connection diagram' which biases the base emitter junction of Q2 at a constant voltage, and uses the collector current of Q2 as the die temperature measurement.

Is there any reason not to use Q2 in a diode connected configuration, base connected to collector, for temperature sensing?

Thank you,
M.Reich

1.8 V reference modelling

uuk — Fri, 06 Feb 2026 15:58:12 GMT

Hi Team,

In my current design a stable 1.8V reference is generated by generating 2.048V from LT6654 and then resistor network and then to a buffer.

Now I want to replace with LT6658AIMSE-1.8 and at the same time I do not want to get compromise on performance.

I need suggestion on this.

Also in the datasheet, 5V is also generated. How is it possible for a 2.5V reference device.

Also , resistor divider are used without any buffers. How will it maintain regulation in this case?

Thanks

Uday

ADR5040 Pin 3 Question

YenChen — Tue, 03 Feb 2026 21:06:05 GMT

Dear Sir,

Since PCN 20_0295, ADR5040 Pin 3 recommended connect to V+, But customer's sch is keep floating as old version. Could you please help us to check is any risk when Pin 3 keep floating on new version ADR5040? Thanks.

Query about REF192

WayneQ — Tue, 03 Feb 2026 21:02:55 GMT

Dear Team,

Please explain or share information …about output shift with respective to temperature value (due to solder effect )…please see below information is available in REFf192 datasheet of page:21 in figure 24…but there is temperature information… Please also explain recommended soldering temperature for solder REF192 part using” leaded profile”

Thanks in advance for your kindly help!

Br,

Wayne

Design Inquiry

AbhishekManoj — Thu, 04 Dec 2025 06:14:39 GMT

Hi Team,

I'm planning to use ADR4525BRZ as 2.5V voltage reference for the DAC AD3552R

What is the start-up time for the IC as i couldn't get those details in datasheet.

The Cin capacitors provided are 0.1uF and 1uF

The Cout capacitors provided are two 1uF and one 0.1uF

Regards,

Abhishek

Design Inquiry

AbhishekManoj — Thu, 04 Dec 2025 05:42:24 GMT

Hi Team,

I'm planning to use ADR444 as 4V voltage reference for the ADC AD7768.

What is the start-up time for the IC as i couldn't get those details in datasheet.

Regards,

Abhishek

MAX6035

Rick_Jones — Fri, 14 Nov 2025 16:17:46 GMT

MAX6035 datasheet for 5V output version, top of the 2 tables (pages 4 & 5) states Vin=5V. But Dropout voltage is ~2V.

What should Vin be at the top of the table (since Vin=5V is incorrect)?

Graphs show Vin=15V.

Request for LTspice Simulation Model – ADR444BRZ

MdArshad — Tue, 11 Nov 2025 11:56:42 GMT

I am working on a circuit using the ADR444BRZ and could not find its LTspice simulation model. Kindly share the LTspice-compatible model or equivalent simulation file for this component.

Standard SPICE model for the LT6658-1.2

przemhb — Fri, 07 Nov 2025 09:27:32 GMT

Hi,

I know Analog provides LTSpice model for the LT6658-1.2. Unfortunately, it leverages many unique features of LTSpice syntax and cannot be used in other SPICE simulators like, for example, Micro-Cap.

Hence, I am looking for a standard SPICE model of the LT6658-1.2.

Request for LTSpice Models

MdArshad — Tue, 28 Oct 2025 05:37:47 GMT

Could you please provide LTSpice simulation models (or equivalent) for the ADR444BRZ and ADR4525BRZ voltage references?

LT6654BX DNC Pins

AmrTaha — Fri, 19 Sep 2025 17:32:05 GMT

I'm considering using the LT6654BX in a new design. The datasheet states that the two DNC pins should have minimum leakage to ground or Vin. It suggests placing a metal ring around the pins and connecting these rings to Vout. The IC package is too small to allow for a trace ring around the pins. I was searching for a reference PCB layout on how this is to be done. Any thoughts or recommendations will be appreciated.

Incorrect connection on the block diagram in the data sheet?

MEGAMUTANTARCSKILLZOR — Tue, 16 Sep 2025 14:17:03 GMT

Dear Sir/Madam

In the block diagram, the VCC pin of the heater's operational amplifier is connected to REF6P6_S. Is this correct in reality, or is the diagram incorrect?

Best regards, Zsolt

Design files for ADR 1001 Evaluation board

adilpickles — Mon, 15 Sep 2025 20:16:32 GMT

Hello,

I am looking for the design files for the EVAL-ADR1000 to kick-start my own 10 volt reference. However, on the main ADI page for the EVAL-ADR1001, there is only the User Guide under Documentation & Resources.

Are these design files (or Gerbers) available to the public?

Thanks in advance,

Adil

Is long term stability non-cumulative?

PHCS — Thu, 11 Sep 2025 11:20:30 GMT

According to the datasheet, long term stability of MAX 6165 is 80 ppm/1000Hrs. Is that non-cumulative? Datasheets for equivalent products normally state that the long term stability spec is non-cumulative.

There is a long-term drift plot on the datasheet which suggests it is non-cumulative, but that plot can only be for one-off product so it is insufficient to draw conclusions.

This is a very important specification for us. Thanks very much.

Output voltage fluctuation data for the MAX6102

miky — Thu, 11 Sep 2025 04:57:02 GMT

Hello.

I have a question about MAX6102.

Regarding the output voltage of the MAX6102, do you have any data or actual measurement results that guarantee voltage fluctuations during moisture absorption?

Best regards.

miky

Minimum Load requirement of MAX7070

Vasu457 — Thu, 28 Aug 2025 12:55:03 GMT

Hello

What is the minimum load requirement for MAX6070. Datasheet is not mentioning about the min load or lighter load conditions .

Thanks

Regards

Vasu

Thermal Resistances (thetaJA, thetaJB, thetaJC)

crdufour — Mon, 25 Aug 2025 16:26:22 GMT

What are the thermal resistances for the MAX6138 parts? In particular, I am looking for MAX6138AEXR21+T & MAX6138AEXR30+T. If the junction temperature is listed in the datasheet, the rise to that junction temperature in theory should also be available.

The legacy maxim datasheet provided the following in the absolute max ratings... https://www.analog.com/media/en/technical-documentation/data-sheets/MAX6138.pdf

Continuous Power Dissipation (TA = +70°C)

3-Pin SC70 (derate 2.17mW/°C above +70°C)...........174mW

Operating Temperature Range........................... -40°C to +85°C

Storage Temperature Range............................ -65°C to +150°C

Junction Temperature......................................................+150°C

Identify IC

rtoi — Thu, 21 Aug 2025 19:16:45 GMT

8pin soic IC Markets only R12 and AD logo.

can anyone identificado this ic?

Long Term Drift ADR3525 versus ADR3625

toldo83 — Thu, 14 Aug 2025 22:03:45 GMT

I am comparing the long-term drift between the 3525 and 3625.

The test conditions for long-term drift are different, as shown in Table 2 of both datasheets. Both parts show similar performance in terms of noise (uVpp) and output voltage drift (ppm/°C).

The quiescent current is also very similar. The main difference is in line regulation. The initial accuracy also differs: 0.1% for the 3525 and 0.04% for the 3625.

Can you explain, from a physics point of view, why the 3525 exhibits a long-term drift of 30 ppm after 1000 hours, while the 3625 shows a long-term drift of 140 ppm after 1000 hours?

I do not understand the price difference based on these specifications.

From my perspective, the 3625 does not perform better. The 3525 was released in 2010 and is qualified for automotive applications, while the 3625 was released in 2023 and is not qualified for automotive use.

Additionally, the 3625 accepts a maximum load capacitor of 1 uF.

I am not criticizing the 3625; I just do not understand the discrepancy in long-term drift, since it is influenced by test equipment, environment, and package.

I am assuming that your parts are tested under the same conditions.

Q&A - Recent Threads

sot23-6 back side date code MAX6043BAUT50

Request: ADR1001 Official Demo Board Test Data

LT1236: configuration of Vin terminal in use of negative voltage output

max6006 spice model

Connecting several LT1460 in series to get high voltages

Temperature sensing transistor configuration

1.8 V reference modelling

ADR5040 Pin 3 Question

Query about REF192

Design Inquiry

Design Inquiry

MAX6035

Request for LTspice Simulation Model – ADR444BRZ

Standard SPICE model for the LT6658-1.2

Request for LTSpice Models

Suggested Answer SLA testing

LT6654BX DNC Pins

Incorrect connection on the block diagram in the data sheet?

Design files for ADR 1001 Evaluation board

Is long term stability non-cumulative?

Output voltage fluctuation data for the MAX6102

Minimum Load requirement of MAX7070

Thermal Resistances (thetaJA, thetaJB, thetaJC)

Identify IC

Long Term Drift ADR3525 versus ADR3625