Part A
AD5254BRUZ100
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4724 PCS
- Package
- TSSOP-20
- Series
- Data Acquisition - Digital Potentiometers
Replacement verdict
Compatible functional replacement candidate
The AD5254BRUZ100 and AD5254BRU50 are functionally compatible digital potentiometers from the same AD5254 family, sharing identical architecture, interface, channel count, and package type. The primary distinction is end-to-end resistance, which affects the rheostat mode current handling and voltage divider loading characteristics. Designers must verify that the 50 kΩ variant meets the specific resistance requirements of their application before substituting.
End-to-End Resistance
Not compatible
Package Type
High match
Channel Count
High match
Interface Type
High match
Parts at a glance
Part B
AD5254BRU50
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 76 PCS
- Package
- TSSOP-20
- 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 | AD5254BRUZ100 | AD5254BRU50 | Why it matters |
|---|---|---|---|
| End-to-End Resistance | 100 kΩ | 50 kΩ | Determines the nominal resistance range of the digital potentiometer, directly affecting the current and voltage levels in the application circuit. |
| Number of Positions | 256 | 256 | Defines the resolution or number of wiper tap settings available for adjustment. |
| Number of Channels | 4 | 4 | Indicates how many independent potentiometer channels are integrated in a single package. |
| Interface Type | I²C | I²C | Specifies the digital communication protocol used to control the device, affecting host controller compatibility. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines the operating voltage window required for proper device function and logic level compatibility. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Specifies the ambient temperature range over which the device is guaranteed to operate within specifications. |
| Package / Case | 14-TSSOP | 14-TSSOP | Determines the physical footprint and mounting compatibility on the PCB. |
| Nonvolatile Memory | Yes (EEPROM) | Yes (EEPROM) | Indicates whether the wiper setting is retained after power loss, which is critical for applications requiring preset restoration. |
| Wiper Resistance | Typical 100 Ω | Typical 100 Ω | Represents the parasitic resistance of the wiper switch, affecting accuracy and signal integrity in the signal path. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5254BRUZ100 | AD5254BRU50 |
|---|---|---|
| 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) | 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 is the main difference between the AD5254BRUZ100 and the AD5254BRU50?
The primary difference is the end-to-end resistance value of the digital potentiometer. The AD5254BRUZ100 has a nominal resistance of 100 kΩ, while the AD5254BRU50 has a nominal resistance of 50 kΩ. Both are quad-channel, 256-position, I2C-compatible digital potentiometers from Analog Devices in a 20-lead TSSOP package.
Are the AD5254BRUZ100 and AD5254BRU50 pin-compatible?
Yes. Both devices are offered in the same 20-lead TSSOP (RU-20) package and share the same pinout. The only difference is the internal resistor array value, so they are pin-to-pin compatible in designs where the resistance value can be adjusted.
Can the AD5254BRUZ100 and AD5254BRU50 be used interchangeably in an existing design?
Not without validation. Although they are pin-compatible, the 2:1 resistance difference affects divider ratios, current through the potentiometer, power dissipation, and the resulting output voltage or gain in the target circuit. The designer must verify that the new resistance value meets the circuit requirements before substitution.
Do both parts have the same number of positions and interface?
Yes. Both the AD5254BRUZ100 and AD5254BRU50 are 256-position (8-bit) quad-channel digital potentiometers with an I2C-compatible serial interface. They also include nonvolatile EEPROM memory for storing wiper settings, and both operate from a single 2.7 V to 5.5 V supply or dual ±2.5 V supplies.
How does the resistance value affect power dissipation in these devices?
For a given voltage across the potentiometer terminals, the 50 kΩ version (AD5254BRU50) will dissipate approximately twice the power of the 100 kΩ version (AD5254BRUZ100), since power is inversely proportional to resistance (P = V²/R). The designer must ensure the power rating of the selected device and package is not exceeded.
Are the AD5254BRUZ100 and AD5254BRU50 available in the same temperature range?
Yes. Both devices are specified for the industrial temperature range of −40°C to +85°C, consistent with the Analog Devices AD5254 datasheet for the RU-20 package options.
Which part should be selected for a circuit requiring lower current through the potentiometer?
The AD5254BRUZ100 (100 kΩ) should be selected when lower current through the potentiometer is desired, because for the same applied voltage the current is inversely proportional to resistance. The AD5254BRU50 (50 kΩ) will draw approximately twice the current of the 100 kΩ version under identical voltage conditions.