Part A
AD5254BRUZ100
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4724 ПКС
- Package
- TSSOP-20
- Series
- Сбор данных - цифровые потенциометры
Replacement verdict
Compatible functional replacement candidate
The AD5253BRU50-RL7 and AD5254BRUZ100 share the same quad-channel digital potentiometer architecture, I²C interface, and TSSOP-20 footprint, making the AD5253BRU50-RL7 a viable functional substitute for the AD5254BRUZ100 in many non-volatile memory-dependent designs. However, the difference in end-to-end resistance (50 kΩ versus 100 kΩ) and the absence of the AD5254's user-accessible EEMEM in the AD5253 require careful validation against the target application's calibration and wiper resistance requirements before committing to a drop-in replacement.
End-to-End Resistance
Validation required
Channel Count
High match
Package Type
High match
Non-Volatile Memory
Validation required
Parts at a glance
Part B
AD5253BRU50-RL7
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2747 ПКС
- Package
- TSSOP-20
- Series
- Сбор данных - цифровые потенциометры
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD5254BRUZ100 | AD5253BRU50-RL7 | Why it matters |
|---|---|---|---|
| Number of Positions | 256 | 64 | Determines the resolution of resistance adjustment; a 256-position device offers finer wiper granularity than a 64-position device. |
| Number of Channels | 4 | 4 | Indicates how many independent potentiometer channels are integrated in one package, affecting board space and channel count per design. |
| End-to-End Resistance | 100 kΩ | 50 kΩ | Sets the nominal resistance range of the digital potentiometer, directly impacting the achievable resistance values in the application circuit. |
| Interface Type | I²C | I²C | Defines the digital communication protocol used to control the device, affecting compatibility with the host controller and bus design. |
| Wiper Resistance | 200 Ω (typical) | 200 Ω (typical) | Represents the parasitic series resistance of the wiper switch, which affects accuracy and minimum achievable resistance in the signal path. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Specifies the allowable power supply range, determining compatibility with 3 V and 5 V logic systems. |
| Nonvolatile Memory | Yes (EEPROM) | Yes (EEPROM) | Indicates whether the wiper setting is retained after power loss, which is critical for applications requiring a known startup state. |
| Package / Mounting | 14-TSSOP (Surface Mount) | 14-TSSOP (Surface Mount) | Defines the physical footprint and assembly method, affecting PCB layout and manufacturing compatibility. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Specifies the environmental conditions under which the device is guaranteed to operate within specification. |
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 | AD5254BRUZ100 | AD5253BRU50-RL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Taper | Linear | Linear |
| Configuration | Potentiometer | Potentiometer |
| Number of Circuits | 4 | 4 |
| Number of Taps | 256 | 64 |
| Resistance(Ohms) | 100k | 50k |
| Interface | I²C | I²C |
| Memory Type | Non-Volatile | Non-Volatile |
| Voltage - Supply | 2.7V ~ 5.5V, ±2.25V ~ 2.75V | 2.7V ~ 5.5V, ±2.25V ~ 2.75V |
| Features | Selectable Address | Selectable Address |
| Tolerance | ±20% | ±20% |
| Temperature Coefficient(Typ) | 650ppm/°C | 650ppm/°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 AD5254BRUZ100 and AD5253BRU50-RL7?
The AD5254BRUZ100 is a quad-channel, 100 kΩ digital potentiometer with 256 positions and nonvolatile memory, while the AD5253BRU50-RL7 is a quad-channel, 50 kΩ digital potentiometer with 64 positions and nonvolatile memory. Both are I2C-compatible and come in 20-lead TSSOP packages, but they differ in resistance value and resolution.
Are the AD5254BRUZ100 and AD5253BRU50-RL7 pin-compatible?
Yes, both devices are offered in a 20-lead TSSOP package and share the same pinout, allowing for potential hardware compatibility. However, firmware and resistance settings must be adjusted to account for the different resolutions and end-to-end resistance values.
What is the resolution of each device?
The AD5254BRUZ100 provides 256 positions (8-bit resolution), while the AD5253BRU50-RL7 provides 64 positions (6-bit resolution). This affects the step size and precision of resistance adjustments.
What are the end-to-end resistance values of these digital potentiometers?
The AD5254BRUZ100 has a nominal end-to-end resistance of 100 kΩ, and the AD5253BRU50-RL7 has a nominal end-to-end resistance of 50 kΩ. Both have a tolerance typically specified as ±20% or better depending on the model.
Do both devices support nonvolatile memory storage of wiper settings?
Yes, both the AD5254BRUZ100 and AD5253BRU50-RL7 include nonvolatile memory (EEPROM) that retains the wiper position after power-off, ensuring the last programmed setting is restored on power-up.
What is the interface protocol for these digital potentiometers?
Both devices use a 2-wire I2C-compatible serial interface, supporting standard and fast modes (up to 400 kHz). This allows easy connection to most microcontrollers and digital signal processors.
Can the AD5253BRU50-RL7 be used as a drop-in replacement for the AD5254BRUZ100?
Not directly. Although they are pin-compatible, the different resistance values (50 kΩ vs. 100 kΩ) and resolutions (64 vs. 256 positions) mean the system firmware and circuit design must be re-evaluated to ensure proper operation and desired performance.
What are the typical applications for these digital potentiometers?
Both devices are used in applications such as adjustable gain/offset trimming, programmable filters, volume control, and sensor calibration. The AD5254BRUZ100 offers finer adjustment for higher-precision needs, while the AD5253BRU50-RL7 suits lower-resolution, cost-sensitive designs.