Part A
AD5254BRUZ50
ADI公司
- Lifecycle
- Active
- Stock
- 2128 件
- Package
- TSSOP-20
- Series
- 資料獲取-數位電位器
Replacement verdict
Compatible functional replacement candidate
The AD5254BRUZ50 is a viable functional replacement candidate for the AD5254BRUZ100 in most non-critical applications, as both devices share the same quad-channel digital potentiometer architecture, I2C interface, TSSOP-20 package, and 256-position resolution. The primary distinction is the end-to-end resistance of 50 kΩ versus 100 kΩ, which directly affects the rheostat mode current and potentiometer mode output voltage divider ratio. Designers must validate that the reduced resistance value satisfies the target circuit's current handling, power dissipation, and signal scaling requirements before committing to a drop-in substitution.
End-to-End Resistance
Validation required
Interface Type
High match
Package Type
High match
Resolution
High match
Parts at a glance
Part B
AD5254BRUZ100
ADI公司
- Lifecycle
- Active
- Stock
- 4724 件
- Package
- TSSOP-20
- 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 | AD5254BRUZ100 | AD5254BRUZ50 | Why it matters |
|---|---|---|---|
| End-to-End Resistance | 100 kΩ | 50 kΩ | Determines the nominal resistance range of the digital potentiometer and directly affects the current through and voltage across the device in a given circuit. |
| Number of Positions | 256 | 256 | Defines the resolution or number of discrete wiper settings available for adjustment. |
| Number of Channels | 4 | 4 | Indicates how many independent potentiometer channels are integrated in a single package, affecting board space and channel count requirements. |
| Interface Type | I²C | I²C | Specifies the digital communication protocol used to control the device, which must match the host controller's available bus. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines the operating voltage window and ensures compatibility with the system power rails. |
| Resistance Tolerance | ±30% | ±30% | Indicates the part-to-part variation in absolute end-to-end resistance, which impacts accuracy in absolute resistance applications. |
| Operating Temperature Range | −40 °C to +105 °C | −40 °C to +105 °C | Specifies the ambient temperature range over which the device is guaranteed to operate within datasheet limits. |
| Package / Mounting Type | 20-Lead TSSOP, Surface Mount | 20-Lead TSSOP, Surface Mount | Determines the physical footprint and assembly process compatibility on the PCB. |
| Nonvolatile Memory | EEPROM | EEPROM | Indicates whether the wiper setting is retained after power loss, which is critical for applications requiring a known startup state. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5254BRUZ50 | AD5254BRUZ100 |
|---|---|---|
| Part Status | Active | Active |
| Taper | Linear | Linear |
| Configuration | Potentiometer | Potentiometer |
| Number of Circuits | 4 | 4 |
| Number of Taps | 256 | 256 |
| Resistance(Ohms) | 50k | 100k |
| 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 is the primary difference between the AD5254BRUZ100 and the AD5254BRUZ50?
The primary difference is the end-to-end resistance value of the digital potentiometer. The AD5254BRUZ100 offers a 100 kΩ nominal resistance, while the AD5254BRUZ50 offers a 50 kΩ nominal resistance. Both are quad-channel, I2C-compatible, nonvolatile digital potentiometers in a 20-lead TSSOP package.
Are the AD5254BRUZ100 and AD5254BRUZ50 pin-compatible and package-compatible?
Yes. Both devices are specified in the same 20-lead TSSOP (RU-20) package and share an identical pinout. This allows a common PCB footprint, but the resistance value difference must be validated in the target circuit before substitution.
Do the AD5254BRUZ100 and AD5254BRUZ50 have the same number of channels and interface type?
Yes. Both are quad-channel (four independent potentiometers) digital potentiometers with a 2-wire I2C-compatible serial interface. They also feature nonvolatile memory (EEPROM) to store wiper settings at power-up.
What is the resolution and wiper position count for both the AD5254BRUZ100 and AD5254BRUZ50?
Both devices provide 8-bit resolution, offering 256 positions (0 to 255) for each of the four channels. The wiper position is programmed via the I2C interface and can be stored in nonvolatile memory.
Can the AD5254BRUZ50 be used as a direct drop-in replacement for the AD5254BRUZ100?
Not without circuit validation. Although the package and pinout are identical, the 50 kΩ end-to-end resistance changes the current, voltage division, and power dissipation in the application. The designer must verify that the new resistance value meets the circuit requirements for gain, attenuation, or bias setting.
What are the typical operating voltage and temperature ranges for the AD5254BRUZ100 and AD5254BRUZ50?
Both devices operate from a single 2.7 V to 5.5 V supply (or dual ±2.5 V supplies) and are specified over the industrial temperature range of −40°C to +85°C. These parameters are identical for both resistance variants.
Do the AD5254BRUZ100 and AD5254BRUZ50 have the same nonvolatile memory and power-on reset behavior?
Yes. Both include nonvolatile EEPROM to store wiper settings, and on power-up they automatically recall the stored wiper positions. The memory architecture and I2C control registers are identical between the two resistance options.