Part A
AD5241BRZ1M
ADI公司
- Lifecycle
- Active
- Stock
- 6341 件
- Package
- SOIC-14
- Series
- 資料獲取-數位電位器
Replacement verdict
Not a drop-in replacement
The AD5241BRZ1M and AD5242BR100 are not drop-in replacements for each other. Although both are single-channel digital potentiometers from the same family, they differ in end-to-end resistance, interface protocol, package type, and supply voltage range, requiring circuit redesign and firmware adaptation before substitution.
Different end-to-end resistance
Different interface protocol
Different package type
Different supply voltage range
Parts at a glance
Part B
AD5242BR100
ADI公司
- Lifecycle
- Active
- Stock
- 3089 件
- Package
- SOIC-16
- Series
- 資料獲取-數位電位器
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 | AD5242BR100 | Why it matters |
|---|---|---|---|
| Number of Channels | 1 | 2 | Determines how many independent resistance settings can be controlled; a dual-channel part can replace two single-channel devices. |
| End-to-End Resistance | 1 MΩ | 100 kΩ | Sets the nominal resistance range of the digital potentiometer, directly affecting the achievable voltage division and current levels in the application. |
| Interface Type | I²C | I²C | Defines the digital communication protocol required to program the device; matching interfaces simplifies drop-in replacement. |
| Resolution (Number of Positions) | 256 | 256 | Determines the number of discrete wiper settings and thus the adjustment granularity of the resistance. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Specifies the operating voltage window; compatible ranges allow use in the same system power rail. |
| Package / Mounting Type | 14-Lead SOIC (Surface Mount) | 14-Lead SOIC (Surface Mount) | Physical footprint and mounting style must match the PCB layout for a direct board-level substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Ensures the device functions reliably within the environmental conditions of the target application. |
| Wiper Resistance | 60 Ω (typical) | 60 Ω (typical) | Adds a fixed series resistance in the signal path, affecting accuracy in low-resistance settings. |
| Nonvolatile Memory | No | No | Indicates whether the wiper setting is retained after power loss; volatile devices require reinitialization on every power-up. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5241BRZ1M | AD5242BR100 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Taper | Linear | Linear |
| Configuration | Potentiometer | Potentiometer |
| Number of Circuits | 1 | 2 |
| 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 are the key differences between the AD5241BRZ1M and AD5242BR100?
The AD5241BRZ1M is a single-channel 8-bit digital potentiometer with a 1 MΩ end-to-end resistance, while the AD5242BR100 is a dual-channel 8-bit digital potentiometer with a 100 kΩ end-to-end resistance. Both are I²C-compatible devices from Analog Devices, but they differ in channel count, resistance value, and package pinout.
Are the AD5241BRZ1M and AD5242BR100 pin-compatible?
No. The AD5241BRZ1M is a single-channel device in an 8-lead SOIC package, while the AD5242BR100 is a dual-channel device in a 16-lead SOIC package. They have different pin counts and pin functions, so they are not drop-in replacements for each other.
What is the end-to-end resistance of each device?
The AD5241BRZ1M has a nominal end-to-end resistance of 1 MΩ. The AD5242BR100 has a nominal end-to-end resistance of 100 kΩ. These values are specified in the respective Analog Devices datasheets.
How many potentiometer channels does each device provide?
The AD5241BRZ1M provides one single-channel digitally controlled potentiometer. The AD5242BR100 provides two independent digitally controlled potentiometer channels in a single package.
What digital interface do the AD5241BRZ1M and AD5242BR100 use?
Both devices use a 2-wire I²C-compatible serial interface for programming the wiper position. This is specified in the Analog Devices datasheets for both parts.
What are the typical applications for each device?
The AD5241BRZ1M is typically used where a single high-resistance digital potentiometer is needed, such as in trim and calibration circuits. The AD5242BR100 is used where two independent low-resistance digital potentiometers are required, such as in dual-channel gain and offset adjustment or stereo audio level control.
What is the wiper resistance and resolution of these devices?
Both the AD5241BRZ1M and AD5242BR100 are 8-bit digital potentiometers, providing 256 wiper positions. The wiper resistance is typically specified in the Analog Devices datasheets and varies with the end-to-end resistance value and supply voltage.
Can the AD5241BRZ1M be used as a direct substitute for the AD5242BR100 in an existing design?
No. Because the AD5241BRZ1M is a single-channel 1 MΩ device in an 8-lead package and the AD5242BR100 is a dual-channel 100 kΩ device in a 16-lead package, they are not electrically or mechanically interchangeable. A redesign would be required to substitute one for the other.