Part A
AD5254BRUZ100
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4724 PCS
- Package
- TSSOP-20
- Series
- Acquisição de dados - Potenciômetros Digitais
Replacement verdict
Compatible functional replacement candidate
The AD5254BRUZ100 and AD5254BRU1 are functionally equivalent digital potentiometers from the same AD5254 family, sharing identical architecture, resolution, interface, and operating characteristics. The AD5254BRUZ100 is the RoHS-compliant version of the AD5254BRU1, making it a suitable direct replacement in most applications where lead-free compliance is required or preferred. Designers should verify solder profile compatibility and any application-specific requirements before substituting.
Resistance Value
High match
Interface Type
High match
Package Type
High match
RoHS Compliance
Validation required
Parts at a glance
Part B
AD5254BRU1
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2764 PCS
- Package
- TSSOP-20
- Series
- Acquisição de dados - Potenciômetros Digitais
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 | AD5254BRU1 | Why it matters |
|---|---|---|---|
| Number of Positions | 256 | 256 | Determines the resolution of the digital potentiometer; identical resolution means equivalent wiper step granularity. |
| Number of Taps | 256 | 256 | Defines the number of discrete resistance settings available, directly affecting adjustment precision. |
| Resistance Value | 100 kOhm | 100 kOhm | The end-to-end resistance must match for the part to be a functional drop-in replacement in the same circuit. |
| Number of Potentiometers | 4 | 4 | Indicates how many independent channels are integrated; matching count ensures the same number of controllable resistances. |
| Interface Type | I2C | I2C | The digital control bus must be compatible with the host controller for the device to be programmed correctly. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Ensures the device operates within the system power rails and remains electrically compatible. |
| Memory Type | Non-Volatile (EEPROM) | Non-Volatile (EEPROM) | Non-volatile storage retains the wiper setting after power loss, which is critical for consistent startup behavior. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Defines the environmental conditions under which the device is guaranteed to function within specification. |
| Package / Case | 20-TSSOP | 20-TSSOP | The physical footprint and pinout must match for board-level interchangeability without layout changes. |
| Mounting Type | Surface Mount | Surface Mount | Assembly method must be compatible with the PCB manufacturing process used for the design. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5254BRUZ100 | 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) | 100k | 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
Are the AD5254BRUZ100 and AD5254BRU1 interchangeable in an existing design?
They are not directly interchangeable without design review. The AD5254BRUZ100 is a 100 kΩ quad-channel digital potentiometer in a 20-lead TSSOP package, while the AD5254BRU1 is a 1 kΩ quad-channel digital potentiometer in the same 20-lead TSSOP package. The end-to-end resistance differs by a factor of 100, so the resistance setting, wiper current, and circuit behavior will differ unless the design is specifically adapted for the 1 kΩ version.
What is the main difference between the AD5254BRUZ100 and AD5254BRU1?
The primary difference is the nominal end-to-end resistance: the AD5254BRUZ100 has a 100 kΩ resistance, and the AD5254BRU1 has a 1 kΩ resistance. Both are quad-channel, 256-position digital potentiometers with I²C-compatible interfaces and nonvolatile memory, but the resistance value determines the applicable signal range, wiper current, and power dissipation in the target circuit.
Do the AD5254BRUZ100 and AD5254BRU1 use the same package and pinout?
Yes. Both devices are offered in a 20-lead TSSOP package and share the same pinout and functional block architecture. This means the package footprint and pin functions are compatible, but the electrical resistance difference still requires circuit-level verification before substitution.
Can the AD5254BRU1 replace the AD5254BRUZ100 in a voltage divider application?
Only if the circuit is redesigned or verified for the lower resistance. In a voltage divider configuration, the output depends on the ratio of the wiper resistance to the end-to-end resistance. The AD5254BRU1 has a much lower end-to-end resistance, so the wiper resistance and load current effects become more significant, potentially causing errors or excessive current that were not present with the 100 kΩ AD5254BRUZ100.
Are the AD5254BRUZ100 and AD5254BRU1 both nonvolatile digital potentiometers?
Yes. Both the AD5254BRUZ100 and AD5254BRU1 are quad-channel, 256-position digital potentiometers with nonvolatile memory, allowing the wiper setting to be retained after power cycling. They also include an I²C-compatible serial interface and can be used in applications such as adjustable gain, offset trimming, and programmable voltage references.
What is the wiper current rating for the AD5254BRUZ100 and AD5254BRU1?
The maximum wiper current is not identical for both resistance versions. The AD5254BRU1, with its lower 1 kΩ end-to-end resistance, has a higher current capability than the AD5254BRUZ100, but the exact limit must be taken from the manufacturer datasheet. In general, lower resistance digital potentiometers can handle higher wiper currents, but the allowable current also depends on power dissipation and the applied voltage across the terminals.
Do the AD5254BRUZ100 and AD5254BRU1 have the same temperature coefficient?
No. The temperature coefficient of the digital potentiometer is typically specified in ppm/°C and can vary between resistance versions. The AD5254BRUZ100 and AD5254BRU1 may have different ratiometric and end-to-end temperature coefficients, so the datasheet for each specific part number should be consulted for the exact values. Do not assume identical temperature behavior when substituting one for the other.
Which part number should be used for a low-power, high-impedance signal trimming application?
The AD5254BRUZ100 is generally more suitable for low-power, high-impedance signal trimming because its 100 kΩ end-to-end resistance draws less current for a given voltage. The AD5254BRU1, with 1 kΩ, is better suited for lower-impedance circuits or applications requiring higher wiper current. The choice depends on the required signal range, allowable loading, and power budget of the specific design.