Part A
AD5242BRZ10
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3626 PCS
- Package
- SOIC-16
- Series
- Acquisition de données - potentiomètres numériques
Replacement verdict
Compatible functional replacement candidate
The AD5242BRZ10 and AD5242BR1M are functionally compatible dual-channel digital potentiometers sharing the same I²C interface, package, and supply requirements, but they differ in end-to-end resistance (10 kΩ vs 1 MΩ), which directly affects divider ratios, wiper current, and bandwidth in the target circuit. The AD5242BR1M can serve as a functional substitute for the AD5242BRZ10 only when the application is redesigned or recalibrated for the higher resistance value; otherwise, validation of the resistance-dependent performance is required before substitution.
Interface Type
High match
Package Type
High match
Channel Count
High match
End-to-End Resistance
Not compatible
Parts at a glance
Part B
AD5242BR1M
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6472 PCS
- Package
- SOIC-16
- 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 | AD5242BRZ10 | AD5242BR1M | Why it matters |
|---|---|---|---|
| End-to-End Resistance | 10 kΩ | 1 MΩ | Determines the nominal resistance range of the digital potentiometer, directly affecting the current and voltage levels in the target circuit. |
| Number of Positions | 256 | 256 | Defines the wiper resolution; identical resolution means both parts offer the same number of tap settings. |
| Interface Type | I²C | I²C | Both use the same digital control interface, so they are interchangeable from a communication protocol standpoint. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Matching supply ranges ensure both devices operate in the same system power environment. |
| Number of Channels | 2 | 2 | Both provide dual-channel potentiometer functionality, preserving circuit topology compatibility. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings mean both parts suit the same environmental conditions. |
| Package / Mounting Type | 16-Lead SOIC (Surface Mount) | 16-Lead SOIC (Surface Mount) | Same package and footprint allow direct board-level substitution without layout changes. |
| Wiper Resistance | ~60 Ω typical | ~400 Ω typical | Higher wiper resistance in the 1 MΩ version affects accuracy and loading, especially in low-impedance circuits. |
| Nominal Resistance Tolerance | ±30 % | ±30 % | Tolerance affects absolute resistance accuracy; both share the same tolerance, but the absolute resistance differs greatly. |
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 | AD5242BRZ10 | AD5242BR1M |
|---|---|---|
| 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) | 10k | 1M |
| 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% | -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 primary difference between the AD5242BRZ10 and the AD5242BR1M?
The primary difference is the end-to-end resistance value of the digital potentiometer. The AD5242BRZ10 has a 10 kΩ nominal resistance, while the AD5242BR1M has a 1 MΩ nominal resistance. Both are dual-channel, 256-position, I2C-compatible digital potentiometers from Analog Devices in a 16-lead SOIC package.
Are the AD5242BRZ10 and AD5242BR1M pin-compatible?
Yes. Both devices are offered in the same 16-lead SOIC (R-16) package and share the same pinout, including I2C address pins, SDA, SCL, and the two independent potentiometer terminals (A, B, and W for each channel). They can be interchanged on a PCB without layout changes.
Can the AD5242BRZ10 and AD5242BR1M be used interchangeably in a circuit?
Not directly without design validation. Although they are pin-compatible, the 100:1 difference in end-to-end resistance (10 kΩ vs. 1 MΩ) significantly affects the circuit's impedance, current, and time-constant behavior. The appropriate resistance value must be selected based on the specific application requirements.
What is the resolution and number of positions for both the AD5242BRZ10 and AD5242BR1M?
Both devices provide 256 positions per channel, which corresponds to 8-bit resolution. Each channel has a wiper that can be programmed to one of 256 discrete tap points between terminal A and terminal B.
What digital interface do the AD5242BRZ10 and AD5242BR1M use?
Both devices use a 2-wire I2C-compatible serial interface. They support standard and fast I2C modes (up to 400 kHz) and include two address pins that allow up to four devices to be connected on the same bus.
What are the operating voltage and temperature ranges for the AD5242BRZ10 and AD5242BR1M?
Both devices operate from a single 2.7 V to 5.5 V supply and are specified over the industrial temperature range of −40°C to +85°C. The AD5242BRZ10 and AD5242BR1M are also available in extended temperature versions, but the standard BRZ and BR1M grades are rated for the industrial range.
Which applications typically use the 10 kΩ AD5242BRZ10 versus the 1 MΩ AD5242BR1M?
The AD5242BRZ10 (10 kΩ) is commonly used in low-impedance signal conditioning, programmable gain amplifiers, and audio volume control where lower thermal noise and higher current handling are beneficial. The AD5242BR1M (1 MΩ) is typically used in high-impedance sensor trimming, low-power bias networks, and applications requiring minimal loading of high-impedance sources.
Do the AD5242BRZ10 and AD5242BR1M have the same wiper resistance and bandwidth characteristics?
No. Wiper resistance and bandwidth are strongly dependent on the end-to-end resistance. The AD5242BRZ10 (10 kΩ) has a lower typical wiper resistance and a higher −3 dB bandwidth than the AD5242BR1M (1 MΩ). Designers must consult the respective datasheet curves for exact values, as these parameters scale with the nominal resistance.