Part A
AD5243BRMZ100
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5248 PCS
- Package
- MSOP-10
- Series
- Data Acquisition - Digital Potentiometers
Replacement verdict
Compatible functional replacement candidate
The AD5243BRMZ100 and AD5243BRM10 are functionally compatible digital potentiometers from the same AD5243 family, sharing identical package, interface, and channel configuration. The primary distinction is end-to-end resistance, which directly affects the application's signal range and calibration behavior. Designers should verify that the resistance value aligns with their circuit requirements before substituting.
End-to-End Resistance
Not compatible
Package Type
High match
Interface Type
High match
Channel Count
High match
Parts at a glance
Part B
AD5243BRM10
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 410 PCS
- Package
- MSOP-10
- Series
- Data Acquisition - Digital Potentiometers
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD5243BRMZ100 | AD5243BRM10 | Why it matters |
|---|---|---|---|
| End-to-End Resistance | 100 kΩ | 10 kΩ | Determines the nominal resistance range of the digital potentiometer and directly affects the current through and voltage across the wiper circuit in the target application. |
| Number of Positions | 256 | 256 | Defines the wiper resolution; identical resolution means both parts offer the same number of adjustable steps for a given resistance range. |
| Interface Type | I2C | I2C | The digital control interface must match the host controller; both parts use the same 2-wire I2C protocol, so firmware and bus wiring are interchangeable. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Determines compatibility with the system power rail; identical ranges mean either part can operate from the same supply without level shifting. |
| Number of Potentiometers | 2 | 2 | Indicates how many independent resistor channels are available; both provide dual channels, so board layout and channel count requirements are satisfied equally. |
| Package / Mounting | 10-Lead MSOP, Surface Mount | 10-Lead MSOP, Surface Mount | Footprint and assembly compatibility; identical packages allow a drop-in replacement without PCB redesign. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Defines the environmental limits for reliable operation; matching ranges ensure both parts suit the same industrial or automotive temperature conditions. |
| Wiper Resistance (Typical) | 60 Ω | 60 Ω | Wiper resistance contributes to error in the set resistance; the typical value is the same, but it becomes a larger percentage error in the lower-resistance 10 kΩ version. |
| Nominal Resistance Tolerance | ±30 % | ±30 % | Tolerance affects absolute accuracy of the programmed resistance; identical tolerance means the same calibration margin is required for both variants. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5243BRMZ100 | AD5243BRM10 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Taper | Linear | Linear |
| Configuration | Potentiometer | Potentiometer |
| Number of Circuits | 2 | 2 |
| Number of Taps | 256 | 256 |
| Resistance(Ohms) | 100k | 10k |
| Interface | I²C | I²C |
| Memory Type | Volatile | Volatile |
| Voltage - Supply | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Tolerance | -20%, +55% | -20%, +55% |
| Temperature Coefficient(Typ) | 35ppm/°C | 35ppm/°C |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
Frequently asked questions
What is the main difference between the AD5243BRMZ100 and the AD5243BRM10?
The primary difference is the end-to-end resistance value. The AD5243BRMZ100 has a 100 kΩ nominal resistance, while the AD5243BRM10 has a 10 kΩ nominal resistance. Both are dual-channel, 256-position digital potentiometers from Analog Devices in a 10-lead MSOP package.
Are the AD5243BRMZ100 and AD5243BRM10 pin-compatible?
Yes. Both devices are offered in the same 10-lead MSOP (RM) package and share the same pinout, so they are pin-compatible. The difference is the internal resistor array value, not the package or pin functions.
Can the AD5243BRMZ100 and AD5243BRM10 be used interchangeably in a design?
Not without validating the circuit. Because the end-to-end resistance differs by a factor of 10, the wiper resistance, current through the potentiometer, and the resulting voltage or gain in the application will change. The replacement must be evaluated against the target circuit requirements.
What is the resolution and number of positions for both the AD5243BRMZ100 and AD5243BRM10?
Both devices provide 256-position resolution per channel and are dual-channel digital potentiometers. The resolution is 8 bits, and the number of positions is 256 for each of the two channels.
What supply voltage and interface do the AD5243BRMZ100 and AD5243BRM10 use?
Both parts operate from a single 2.7 V to 5.5 V supply and use a 3-wire SPI-compatible serial interface for programming the wiper position. These parameters are common to the AD5243 family.
Do the AD5243BRMZ100 and AD5243BRM10 have the same temperature coefficient and tolerance?
No. The end-to-end resistance tolerance and the ratiometric temperature coefficient are specified per resistance value. The 100 kΩ and 10 kΩ versions have different absolute tolerance and tempco specifications in the datasheet, so these parameters must be checked separately for each part.
Which part number indicates the 100 kΩ option and which indicates the 10 kΩ option?
In the AD5243 ordering code, the suffix after the package and temperature grade indicates the resistance value. The AD5243BRMZ100 is the 100 kΩ version, and the AD5243BRM10 is the 10 kΩ version. The "Z" in AD5243BRMZ100 denotes RoHS-compliant packaging.
Are both the AD5243BRMZ100 and AD5243BRM10 RoHS compliant?
The AD5243BRMZ100 includes the "Z" suffix, which indicates a RoHS-compliant, lead-free package. The AD5243BRM10 without the "Z" suffix may be a non-RoHS or legacy ordering variant. The exact compliance status should be confirmed from the manufacturer's ordering guide or the distributor's product page.