Part A
AD5243BRMZ100
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5248 PCS
- Package
- MSOP-10
- Series
- Acquisition de données - potentiomètres numériques
Replacement verdict
Compatible functional replacement candidate
The AD5243BRMZ100 and AD5248BRM10-RL7 are both dual-channel digital potentiometers from Analog Devices in MSOP-10 packages, sharing I²C-compatible interfaces and similar operating voltage ranges. However, they differ in end-to-end resistance (100 kΩ vs. 10 kΩ), wiper configuration, and rheostat mode support, so the AD5248BRM10-RL7 is not a direct drop-in substitute for the AD5243BRMZ100 without validating circuit-level requirements.
End-to-End Resistance
Validation required
Channel Count
High match
Package Type
High match
Wiper Configuration
Validation required
Parts at a glance
Part B
AD5248BRM10-RL7
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4144 PCS
- Package
- MSOP-10
- Series
- Acquisition de données - potentiomètres numériques
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 | AD5248BRM10-RL7 | Why it matters |
|---|---|---|---|
| Number of Channels | 2 | 2 | Both are dual-channel digital potentiometers, so channel count matches for direct functional substitution. |
| End-to-End Resistance | 100 kΩ | 10 kΩ | Resistance value directly affects the circuit's gain, attenuation, or bias setting; a 10x difference prevents direct substitution without redesign. |
| Resolution (Taps) | 256 positions (8-bit) | 256 positions (8-bit) | Tap count determines the wiper adjustment granularity; identical resolution preserves step size behavior when resistance matches. |
| Interface Type | I²C (2-wire) | I²C (2-wire) | Both use I²C, so the host controller firmware and bus topology remain compatible. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Matching supply range ensures both parts operate in the same system power domain without level shifting. |
| Wiper Resistance (Typical) | ~60 Ω | ~60 Ω | Wiper resistance contributes to error in the programmed resistance; similar values preserve accuracy characteristics. |
| Nonvolatile Memory | No (volatile wiper setting) | No (volatile wiper setting) | Both lose wiper position on power-down, so system initialization must reprogram the wiper after each power cycle. |
| Package Type | 10-lead MSOP | 10-lead MSOP | Identical package and pinout allow drop-in PCB compatibility without layout changes. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Same temperature rating ensures both parts meet the same environmental and reliability requirements. |
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 | AD5248BRM10-RL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Taper | Linear | Linear |
| Configuration | Potentiometer | Rheostat |
| 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 |
| Features | - | Selectable Address |
| 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
Are the AD5243BRMZ100 and AD5248BRM10-RL7 interchangeable in a design?
No, they are not directly interchangeable. The AD5243BRMZ100 is a dual-channel 100 kΩ digital potentiometer, while the AD5248BRM10-RL7 is a dual-channel 10 kΩ digital potentiometer with a different resistance value and interface configuration. The resistance difference alone prevents direct substitution without redesigning the surrounding circuit.
What is the end-to-end resistance of each device?
The AD5243BRMZ100 provides a 100 kΩ end-to-end resistance. The AD5248BRM10-RL7 provides a 10 kΩ end-to-end resistance. These values are fixed per part number and cannot be changed externally.
How many channels and what interface do these digital potentiometers use?
Both devices are dual-channel digital potentiometers. The AD5243BRMZ100 uses a 2-wire I²C-compatible interface. The AD5248BRM10-RL7 uses a 3-wire SPI-compatible interface. The interface difference affects microcontroller pin allocation and firmware.
What are the package and pin count differences between the two parts?
The AD5243BRMZ100 is supplied in a 10-lead MSOP package. The AD5248BRM10-RL7 is supplied in a 10-lead MSOP package as well. However, pin functions and interface signals differ between the I²C and SPI versions, so PCB layout and connections are not identical.
Do both devices support the same supply voltage range?
Both the AD5243 and AD5248 families operate from a single 2.7 V to 5.5 V supply, according to their respective manufacturer datasheets. Designers should still verify the exact operating conditions and logic thresholds for the specific part number and application.
Can the AD5248BRM10-RL7 replace the AD5243BRMZ100 when a 10 kΩ resistance is required?
Only if the system can accommodate the SPI interface instead of I²C and the circuit is redesigned for the 10 kΩ resistance. The AD5248BRM10-RL7 is not a drop-in replacement for the AD5243BRMZ100 because the resistance, interface protocol, and register map differ.
What are the typical applications for each device?
The AD5243BRMZ100 is commonly used for I²C-controlled gain adjustment, offset trimming, and programmable voltage division where a 100 kΩ resistance is suitable. The AD5248BRM10-RL7 is used in SPI-controlled systems requiring 10 kΩ digital potentiometer channels, such as programmable filters, sensor calibration, and feedback networks.
Are the wiper resistance and resolution specifications the same?
No. The AD5243BRMZ100 and AD5248BRM10-RL7 have different end-to-end resistance values, which affect wiper resistance and the absolute resistance step size. Both are 8-bit (256-position) digital potentiometers, but the resistance per step differs because the total resistance differs. Always consult the respective datasheets for exact wiper resistance and tolerance specifications.