Part A
AD5254BRUZ10
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5455 PCS
- Package
- TSSOP-20
- Series
- Acquisition de données - potentiomètres numériques
Replacement verdict
Compatible functional replacement candidate
The AD5254BRU1 is a functionally compatible alternative to the AD5254BRUZ10, sharing the same quad-channel 10 kΩ digital potentiometer architecture, I²C interface, and TSSOP-20 footprint. The primary distinction is the package finish: the BRU1 denotes a leaded (Sn/Pb) package, while the BRUZ10 denotes a RoHS-compliant lead-free package. Designers must verify solder process compatibility and regulatory requirements before substituting.
Resistance Value
High match
Channel Count
High match
Interface Type
High match
Package Finish
Validation required
Parts at a glance
Part B
AD5254BRU1
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 2764 PCS
- Package
- TSSOP-20
- 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 | AD5254BRUZ10 | AD5254BRU1 | Why it matters |
|---|---|---|---|
| Resistance Value | 10 kΩ | 1 kΩ | The end-to-end resistance sets the nominal wiper resistance range and directly affects the current and voltage levels in the application circuit, so a different value changes the circuit's behavior. |
| Number of Positions | 256 | 256 | The number of tap positions determines the resolution of the digital potentiometer; matching resolution ensures equivalent adjustment granularity. |
| Number of Channels | 4 | 4 | The channel count defines how many independent potentiometer elements are available, which must match for direct functional replacement. |
| Interface Type | I2C | I2C | The digital interface must be compatible with the host controller for the device to be controlled correctly. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | The operating supply range must match the system power rails to ensure proper operation and logic-level compatibility. |
| Nonvolatile Memory | Yes (EEPROM) | Yes (EEPROM) | Nonvolatile memory retains the wiper setting after power loss, which is important for applications requiring a known startup state. |
| Package / Mounting | TSSOP-20, Surface Mount | TSSOP-20, Surface Mount | Package and mounting type must match for the part to fit the same PCB footprint and assembly process. |
| Wiper Resistance (Typical) | Approximately 100 Ω | Approximately 100 Ω | Wiper resistance contributes to the total resistance in series with the load and can affect accuracy, especially at low resistance settings. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range must cover the application's environmental conditions for reliable operation. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5254BRUZ10 | AD5254BRU1 |
|---|---|---|
| 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 | 256 |
| Resistance(Ohms) | 10k | 1k |
| 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% | ±30% |
| 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 AD5254BRUZ10 and AD5254BRU1?
The AD5254BRUZ10 and AD5254BRU1 are both quad-channel, 256-position digital potentiometers (digiPOTs) from Analog Devices. They feature an I2C-compatible serial interface, nonvolatile memory (EEPROM) for wiper settings, and are available in a 20-lead TSSOP package. The primary difference between the two part numbers is the end-to-end resistance value: the AD5254BRUZ10 offers 10 kΩ, while the AD5254BRU1 offers 1 kΩ.
What is the main difference between the AD5254BRUZ10 and AD5254BRU1?
The main difference is the nominal end-to-end resistance. The AD5254BRUZ10 has a 10 kΩ resistance, whereas the AD5254BRU1 has a 1 kΩ resistance. Both parts share the same quad-channel, 256-position architecture, I2C interface, nonvolatile wiper memory, and 20-lead TSSOP package. The "Z" in AD5254BRUZ10 indicates a lead-free/RoHS-compliant package variant, while the AD5254BRU1 may refer to an older or non-Z ordering code; designers should verify the exact ordering suffix and compliance status from the manufacturer datasheet.
Are the AD5254BRUZ10 and AD5254BRU1 pin-compatible?
Yes, both devices are offered in the same 20-lead TSSOP package and share the same pinout, as they belong to the same AD5254 family. Pin functions such as A0, A1, SDA, SCL, VDD, VSS, and the four potentiometer terminals (A, B, W) are identical. Therefore, they are pin-compatible, but the different resistance values must be considered for circuit performance.
Can the AD5254BRUZ10 and AD5254BRU1 be used interchangeably in a design?
They can be used interchangeably only if the circuit performance is acceptable with either 10 kΩ or 1 kΩ end-to-end resistance. Because the resistance affects current, voltage division, and power dissipation, a direct substitution may alter circuit behavior. The designer must verify that the wiper resistance, resolution, and loading effects meet the requirements for both values. The digital interface and control registers are identical, so firmware does not need to change.
What is the resolution and number of positions for these digital potentiometers?
Both the AD5254BRUZ10 and AD5254BRU1 provide 256 positions (8 bits) per channel, allowing the wiper to be set to one of 256 discrete steps between the A and B terminals. This resolution is identical for both resistance variants.
Do the AD5254BRUZ10 and AD5254BRU1 have nonvolatile memory?
Yes, both devices include nonvolatile EEPROM that can store the wiper settings. This allows the potentiometer to power up in a known state without requiring the host controller to rewrite the wiper position after each power cycle. The EEPROM endurance and data retention specifications are the same for both resistance variants.
What is the supply voltage range for the AD5254BRUZ10 and AD5254BRU1?
Both devices operate from a single supply or dual supplies. The specified operating supply voltage range is typically 2.7 V to 5.5 V for single-supply operation, or ±2.5 V to ±2.7 V for dual-supply operation, as documented in the Analog Devices AD5254 datasheet. The digital interface (I2C) operates from the same supply or a separate logic supply, depending on the specific configuration.
What is the temperature range for these digital potentiometers?
The AD5254BRUZ10 and AD5254BRU1 are specified for the industrial temperature range of −40°C to +105°C, as stated in the manufacturer datasheet. This makes them suitable for industrial and automotive applications where wide temperature operation is required.
What are the typical applications for the AD5254BRUZ10 versus the AD5254BRU1?
The AD5254BRUZ10 (10 kΩ) is commonly used in applications requiring moderate resistance, such as adjustable gain/offset trimming, LCD panel calibration, and programmable filters. The AD5254BRU1 (1 kΩ) is better suited for low-resistance applications where higher current handling or lower thermal noise is needed, such as in power supply margining or low-impedance signal conditioning. The choice depends on the required resistance range and circuit impedance levels.