Part A
AD5242BRZ10
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3626 Stückzahl
- Package
- SOIC-16
- Series
- Datenerfassung
Replacement verdict
Compatible functional replacement candidate
The AD5242BRZ10 and AD5241BRZ100-RL7 are both dual-channel I²C digital potentiometers from Analog Devices in the same 14-lead SOIC package, sharing identical supply voltage ranges, interface protocol, and temperature ratings. However, they differ fundamentally in end-to-end resistance (10 kΩ vs 100 kΩ) and wiper configuration (dual independent potentiometers vs dual rheostats), so the AD5241BRZ100-RL7 is not a direct drop-in substitute for the AD5242BRZ10. Designers must validate resistance value and wiper topology against the target circuit before substituting.
End-to-End Resistance
Validation required
Wiper Configuration
Not compatible
Package Type
High match
Supply Voltage Range
High match
Parts at a glance
Part B
AD5241BRZ100-RL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6830 Stückzahl
- Package
- SOIC-14
- Series
- Datenerfassung
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 | AD5241BRZ100-RL7 | Why it matters |
|---|---|---|---|
| Number of Positions | 256 | 256 | Both devices offer 256 wiper positions, providing equivalent digital resolution for adjustment granularity. |
| End-to-End Resistance | 10 kΩ | 100 kΩ | The nominal resistance directly affects the current and voltage range the potentiometer can handle in a given circuit. |
| Number of Channels | 2 | 1 | Channel count determines how many independent resistance paths are available, impacting board space and circuit complexity. |
| Interface Type | I²C | I²C | Both use the same I²C serial interface, allowing similar microcontroller communication protocols. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Identical supply range ensures both parts are compatible with common 3.3 V and 5 V logic systems. |
| Wiper Resistance | 60 Ω typical | 60 Ω typical | Wiper resistance contributes to error in the programmed resistance and affects signal integrity in precision applications. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | Matching temperature ranges ensure both parts can be used in the same industrial and automotive environments. |
| Package Type | 16-Lead SOIC | 14-Lead SOIC | Different package sizes and pin counts affect PCB layout, footprint, and mechanical compatibility. |
| Nonvolatile Memory | No | No | Neither device retains the wiper setting after power loss, requiring reinitialization on each power-up. |
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 | AD5241BRZ100-RL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Taper | Linear | Linear |
| Configuration | Potentiometer | Potentiometer |
| Number of Circuits | 2 | 1 |
| Number of Taps | 256 | 256 |
| Resistance(Ohms) | 10k | 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% | -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 are the key differences between the AD5242BRZ10 and AD5241BRZ100-RL7?
The AD5242BRZ10 is a dual-channel 10 kΩ digital potentiometer with 256 positions and an I²C-compatible interface, while the AD5241BRZ100-RL7 is a single-channel 100 kΩ digital potentiometer with 256 positions and a 3-wire SPI-compatible interface. The AD5242 offers two independent channels in a 16-lead SOIC package, whereas the AD5241 provides one channel in a 14-lead SOIC package.
Are the AD5242BRZ10 and AD5241BRZ100-RL7 pin-compatible?
No. The AD5242BRZ10 is supplied in a 16-lead SOIC (R-16) package, and the AD5241BRZ100-RL7 is supplied in a 14-lead SOIC (R-14) package. The different pin counts and pinouts prevent direct pin-to-pin substitution on the same PCB footprint.
Can the AD5242BRZ10 and AD5241BRZ100-RL7 be used as direct substitutes for each other?
No. They differ in channel count (dual vs. single), end-to-end resistance (10 kΩ vs. 100 kΩ), package (16-lead SOIC vs. 14-lead SOIC), and digital interface (I²C vs. 3-wire SPI). A direct substitution would require redesign of the PCB layout, interface firmware, and resistance-dependent circuit values.
What is the end-to-end resistance and resolution of each device?
The AD5242BRZ10 has a 10 kΩ nominal end-to-end resistance with 256 programmable positions, yielding a wiper resistance step of approximately 39 Ω per LSB. The AD5241BRZ100-RL7 has a 100 kΩ nominal end-to-end resistance with 256 programmable positions, yielding a wiper resistance step of approximately 390 Ω per LSB.
What digital interfaces do the AD5242BRZ10 and AD5241BRZ100-RL7 use?
The AD5242BRZ10 uses a 2-wire I²C-compatible serial interface. The AD5241BRZ100-RL7 uses a 3-wire SPI-compatible serial interface. These interfaces are not interchangeable, so the host controller firmware must match the specific device protocol.
What are the operating voltage and temperature ranges for these devices?
Both the AD5242BRZ10 and AD5241BRZ100-RL7 operate from a single 2.7 V to 5.5 V supply and are specified over the extended industrial temperature range of −40 °C to +85 °C. These parameters are common to both devices in the AD5241/AD5242 family.
How many channels does each device provide?
The AD5242BRZ10 provides two independent digitally controlled potentiometer channels in one package. The AD5241BRZ100-RL7 provides a single digitally controlled potentiometer channel. This difference affects board space, channel count per package, and the number of control words required per adjustment cycle.
What are the typical applications for each device?
The AD5242BRZ10 is typically used where two independent resistance adjustments are needed, such as dual-channel gain and offset trimming, dual-channel sensor calibration, or stereo audio level control. The AD5241BRZ100-RL7 is typically used where a single higher-resistance adjustment is needed, such as single-channel gain setting, LCD panel VCOM adjustment, or programmable voltage reference trimming.