Part A
AD5242BRZ10
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3626 PCS
- Package
- SOIC-16
- Series
- Data Acquisition - Digital Potentiometers
Replacement verdict
Not a drop-in replacement
The AD5242BRZ10 and AD5241BR1M are not drop-in replacements for each other. They differ in end-to-end resistance, interface protocol, package type, and internal memory configuration, so a direct substitution is not feasible without circuit and firmware redesign.
Different end-to-end resistance
Different digital interface
Different package type
Different memory configuration
Parts at a glance
Part B
AD5241BR1M
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 731 PCS
- Package
- SOIC-14
- Series
- Data Acquisition - Digital Potentiometers
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 | AD5241BR1M | Why it matters |
|---|---|---|---|
| Number of Positions | 256 | 256 | Determines the resolution of the digital potentiometer; both offer 8-bit adjustment. |
| End-to-End Resistance | 10 kΩ | 1 MΩ | Sets the nominal resistance range, directly affecting the voltage divider ratio and current handling in the target circuit. |
| Number of Potentiometers | 2 | 1 | Indicates how many independent variable resistors are integrated, impacting board space and channel count. |
| Interface Type | I²C | I²C | Defines the digital communication protocol used to program the device; both use a 2-wire I²C bus. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Specifies the allowable power supply window for proper operation in single-supply systems. |
| Resistance Tolerance | ±30% | ±30% | Indicates the variation in absolute end-to-end resistance, which affects calibration accuracy. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Defines the environmental conditions under which the device is guaranteed to meet specifications. |
| Package / Case | 16-Lead SOIC | 14-Lead SOIC | Determines the physical footprint and pinout, affecting PCB layout and drop-in compatibility. |
| Wiper Resistance | 60 Ω (typical) | 60 Ω (typical) | Adds a fixed series resistance at the wiper, influencing the minimum achievable resistance and signal attenuation. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5242BRZ10 | AD5241BR1M |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Taper | Linear | Linear |
| Configuration | Potentiometer | Potentiometer |
| Number of Circuits | 2 | 1 |
| 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 are the key differences between the AD5242BRZ10 and AD5241BR1M?
The AD5242BRZ10 is a dual-channel 10 kΩ digital potentiometer with 256 positions and an I²C-compatible interface, while the AD5241BR1M is a single-channel 1 MΩ 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 AD5241BR1M pin-compatible?
No. The AD5242BRZ10 is supplied in a 16-lead SOIC (R-16) package, and the AD5241BR1M is supplied in a 14-lead SOIC (R-14) package. They have different pin counts and pinouts, so they are not drop-in replacements for each other.
Can the AD5242BRZ10 and AD5241BR1M be used in the same circuit design?
They can be used in the same system only if the design accommodates their different interfaces, channel counts, end-to-end resistance values, and package footprints. The AD5242BRZ10 uses an I²C-compatible 2-wire interface and provides two 10 kΩ channels, while the AD5241BR1M uses a 3-wire SPI-compatible interface and provides one 1 MΩ channel.
What is the end-to-end resistance of each device?
The AD5242BRZ10 has a 10 kΩ nominal end-to-end resistance. The AD5241BR1M has a 1 MΩ nominal end-to-end resistance. These values are specified by the manufacturer and determine the usable resistance range in each application.
How many resistor channels does each device provide?
The AD5242BRZ10 is a dual-channel digital potentiometer, providing two independently programmable resistor channels. The AD5241BR1M is a single-channel digital potentiometer, providing one programmable resistor channel.
What digital interfaces do the AD5242BRZ10 and AD5241BR1M use?
The AD5242BRZ10 uses an I²C-compatible 2-wire serial interface. The AD5241BR1M uses a 3-wire SPI-compatible serial interface. These interfaces are not interchangeable without additional glue logic or protocol conversion.
What are the operating voltage ranges for these digital potentiometers?
Both the AD5242BRZ10 and AD5241BR1M operate from a single 2.7 V to 5.5 V supply, as specified in the Analog Devices datasheets. This allows use in both 3 V and 5 V systems.
How many wiper positions are available on each device?
Both the AD5242BRZ10 and AD5241BR1M provide 256 wiper positions, giving 8-bit resolution for resistance adjustment. The number of positions is the same, but the end-to-end resistance and channel count differ.
Which device is better for a single-channel 1 MΩ application?
The AD5241BR1M is the appropriate choice for a single-channel 1 MΩ application because it is a single-channel digital potentiometer with a 1 MΩ end-to-end resistance. The AD5242BRZ10 provides two 10 kΩ channels and is not a direct substitute for a 1 MΩ single-channel requirement.