Part A
AD5241BRZ1M
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6341 PCS
- Package
- SOIC-14
- Series
- Acquisição de dados - Potenciômetros Digitais
Replacement verdict
Compatible functional replacement candidate
The AD5241BRZ1M and AD5241BRZ100-RL7 are functionally compatible digital potentiometers sharing identical architecture, interface, and package type, with the primary distinction being end-to-end resistance tolerance and nominal resistance value. Both devices are viable substitutes in non-critical resistance-accuracy applications, though design validation is recommended to confirm that the resistance tolerance and nominal value differences do not affect circuit performance.
Package Type
High match
Interface Type
High match
Resistance Value
Validation required
Resistance Tolerance
Validation required
Parts at a glance
Part B
AD5241BRZ100-RL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6830 PCS
- Package
- SOIC-14
- Series
- Acquisição de dados - Potenciômetros Digitais
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD5241BRZ1M | AD5241BRZ100-RL7 | Why it matters |
|---|---|---|---|
| End-to-End Resistance | 1 MΩ | 100 kΩ | The nominal resistance directly sets the impedance range of the digital potentiometer, so the two parts are not functionally interchangeable in a given circuit without redesign. |
| Number of Positions | 256 | 256 | The number of wiper tap positions determines the resolution of resistance adjustment; identical resolution means equivalent adjustment granularity. |
| Interface Type | I²C | I²C | The control interface must match the host system's communication bus for the device to be driven correctly. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Compatible supply voltage ranges allow the parts to operate in the same system power environment. |
| Number of Potentiometers | 1 | 1 | The channel count must match the number of independent resistance adjustments required by the application. |
| Package / Mounting Type | 14-Lead SOIC (Surface Mount) | 14-Lead SOIC (Surface Mount) | Identical package and mounting type ensure the parts are physically interchangeable on the same PCB footprint. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ranges confirm both parts can be used in the same thermal environment. |
| Nonvolatile Memory | No | No | The absence of nonvolatile wiper storage means both parts require re-initialization after power-up, affecting system startup behavior. |
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 | AD5241BRZ1M | AD5241BRZ100-RL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Taper | Linear | Linear |
| Configuration | Potentiometer | Potentiometer |
| Number of Circuits | 1 | 1 |
| Number of Taps | 256 | 256 |
| Resistance(Ohms) | 1M | 100k |
| Interface | I²C | I²C |
| Memory Type | Volatile | Volatile |
| Voltage - Supply | 2.7V ~ 5.5V, ±2.3V ~ 2.7V | 2.7V ~ 5.5V, ±2.3V ~ 2.7V |
| Features | Selectable Address | Selectable Address |
| Tolerance | -30%, +50% | -30%, +50% |
| Temperature Coefficient(Typ) | 30ppm/°C | 30ppm/°C |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
Frequently asked questions
What is the main difference between AD5241BRZ1M and AD5241BRZ100-RL7?
The primary difference is the end-to-end resistance value and packaging. The AD5241BRZ1M offers a 1 MΩ nominal resistance, while the AD5241BRZ100-RL7 offers a 100 kΩ nominal resistance. Both are single-channel, 256-position digital potentiometers from Analog Devices in 14-lead SOIC packages, but the AD5241BRZ100-RL7 is supplied in tape and reel format.
Are the AD5241BRZ1M and AD5241BRZ100-RL7 pin-compatible?
Yes. Both devices are members of the AD5241 family and are offered in the same 14-lead SOIC (R-14) package with identical pin functions. This allows them to share the same PCB footprint, but the different resistance values must be considered in the application circuit.
Can the AD5241BRZ1M and AD5241BRZ100-RL7 be used interchangeably in a design?
They are not directly interchangeable without circuit evaluation. The 10:1 resistance ratio difference affects wiper resistance, bandwidth, and the achievable adjustment range. The 1 MΩ version is suited for low-power, high-impedance signal paths, while the 100 kΩ version is better for lower-impedance applications. The designer must verify that the chosen resistance value meets the required resolution and loading conditions.
What is the resolution and number of positions for both devices?
Both the AD5241BRZ1M and AD5241BRZ100-RL7 are 256-position digital potentiometers, providing 8-bit resolution. The wiper can be set to any of 256 discrete steps between the A and B terminals, plus the end-to-end positions.
What digital interface do the AD5241BRZ1M and AD5241BRZ100-RL7 use?
Both devices use a 2-wire I²C-compatible serial interface. They support standard and fast I²C modes, allowing the wiper position to be programmed by a microcontroller or other digital host. The devices also include a nonvolatile memory (EEMEM) to store the wiper setting.
What are the operating voltage and temperature ranges for these digital potentiometers?
Both the AD5241BRZ1M and AD5241BRZ100-RL7 operate from a single 2.7 V to 5.5 V supply, or from dual ±2.7 V supplies. The specified operating temperature range for the BRZ grade is –40°C to +105°C, making them suitable for industrial and automotive applications.
Do the AD5241BRZ1M and AD5241BRZ100-RL7 have nonvolatile wiper memory?
Yes. Both devices integrate an on-chip EEMEM that retains the wiper setting when power is removed. On power-up, the wiper position is automatically restored from the EEMEM, eliminating the need for external nonvolatile memory or a microcontroller to reload the setting.
What are the typical applications for the AD5241BRZ1M versus the AD5241BRZ100-RL7?
The AD5241BRZ1M (1 MΩ) is typically used in high-impedance signal conditioning, low-power sensor trimming, and applications where minimal loading of the source is required. The AD5241BRZ100-RL7 (100 kΩ) is commonly used in audio volume control, programmable gain amplifiers, and general-purpose trim circuits where a lower resistance and higher bandwidth are beneficial.