Part A
AD5254BRUZ10
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5455 Stückzahl
- Package
- TSSOP-20
- Series
- Datenerfassung
Replacement verdict
Compatible functional replacement candidate
The AD5251BRUZ10 and AD5254BRUZ10 are both dual-channel digital potentiometers from Analog Devices in the same TSSOP-14 package, sharing identical 10 kΩ end-to-end resistance, I²C interface, and 256-position resolution. The AD5254BRUZ10 offers additional nonvolatile memory storage for wiper settings, making it a functionally compatible upgrade candidate for the AD5251BRUZ10 in most designs, provided the system can accommodate the extended feature set and any associated timing or command differences.
Resistance Value
High match
Channel Count
High match
Package Type
High match
Nonvolatile Memory
Validation required
Parts at a glance
Part B
AD5251BRUZ10
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 389 Stückzahl
- Package
- TSSOP-14
- Series
- Datenerfassung
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 | AD5251BRUZ10 | Why it matters |
|---|---|---|---|
| Number of Positions | 256 | 64 | Resolution determines the number of adjustable wiper steps; a 256-position device offers finer adjustment granularity than a 64-position device. |
| Number of Channels | 4 | 2 | Channel count defines how many independent resistance elements can be controlled; this directly affects circuit architecture and board space. |
| End-to-End Resistance | 10 kΩ | 10 kΩ | Nominal resistance must match the target circuit impedance for proper signal level and current handling. |
| Interface Type | I²C | I²C | The digital control interface must be compatible with the host controller's bus to allow communication and wiper setting updates. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Operating voltage range must encompass the system supply to ensure reliable operation and logic-level compatibility. |
| Memory Type | Nonvolatile (EEPROM) | Nonvolatile (EEPROM) | Nonvolatile memory retains the wiper setting across power cycles, eliminating the need for reinitialization after each power-up. |
| Package | 20-Lead TSSOP | 20-Lead TSSOP | Package footprint and pin count must match the PCB layout for physical compatibility and assembly. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +85 °C | The temperature range must cover the application's environmental conditions; a wider range provides greater margin for industrial or automotive use. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5254BRUZ10 | AD5251BRUZ10 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Taper | Linear | Linear |
| Configuration | Potentiometer | Potentiometer |
| Number of Circuits | 4 | 2 |
| Number of Taps | 256 | 64 |
| Resistance(Ohms) | 10k | 10k |
| 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 AD5254BRUZ10 and AD5251BRUZ10 digital potentiometers?
The AD5254BRUZ10 is a quad-channel, 10 kΩ, 256-position digital potentiometer with I²C interface and nonvolatile memory (EEPROM). The AD5251BRUZ10 is a dual-channel, 10 kΩ, 64-position digital potentiometer with I²C interface and nonvolatile memory. The AD5254 offers four channels and 256 positions, while the AD5251 offers two channels and 64 positions.
Are the AD5254BRUZ10 and AD5251BRUZ10 pin-compatible?
No. The AD5254BRUZ10 is supplied in a 20-lead TSSOP (RU-20) package, while the AD5251BRUZ10 is supplied in a 14-lead TSSOP (RU-14) package. The different pin counts and pinouts prevent direct pin-to-pin compatibility.
Can the AD5251BRUZ10 be used as a direct substitute for the AD5254BRUZ10?
No. The AD5251BRUZ10 has only two channels and 64 positions, whereas the AD5254BRUZ10 has four channels and 256 positions. A direct substitution would require redesign to accommodate the reduced channel count, lower resolution, and different package footprint.
Do both the AD5254BRUZ10 and AD5251BRUZ10 have nonvolatile memory?
Yes. Both devices include nonvolatile EEPROM memory that retains the wiper setting after power-down, allowing the potentiometer to power up in the previously stored position.
What is the end-to-end resistance of the AD5254BRUZ10 and AD5251BRUZ10?
Both the AD5254BRUZ10 and AD5251BRUZ10 have a nominal end-to-end resistance of 10 kΩ, as indicated by the "10" suffix in the part number.
What digital interface do the AD5254BRUZ10 and AD5251BRUZ10 use?
Both devices use a 2-wire I²C-compatible serial interface for programming and reading back the wiper settings.
What are the typical applications for the AD5254BRUZ10 versus the AD5251BRUZ10?
The AD5254BRUZ10 is suited for applications requiring four independent programmable resistance channels with finer 256-position resolution, such as multi-channel gain control or offset trimming. The AD5251BRUZ10 is suited for space-constrained designs needing two channels with 64-position resolution, such as dual-channel bias adjustment or volume control.
Do the AD5254BRUZ10 and AD5251BRUZ10 operate over the same supply voltage range?
Yes. Both devices operate from a single 2.7 V to 5.5 V supply, or from dual ±2.5 V supplies, as specified in the Analog Devices datasheets.