Part A
AD5252BRUZ1
ADI公司
- Lifecycle
- Active
- Stock
- 4418 件
- Package
- TSSOP-14
- Series
- 資料獲取-數位電位器
Replacement verdict
Not a drop-in replacement
The AD5252BRUZ1 and AD5251BRU1-RL7 are not drop-in replacements for each other. Although both are dual-channel digital potentiometers from Analog Devices in TSSOP-14 packages, they differ in resolution, interface protocol, and nonvolatile memory architecture, requiring design validation before any substitution.
Different resolution
Different interface protocol
Different memory architecture
Different wiper resistance
Parts at a glance
Part B
AD5251BRU1-RL7
ADI公司
- Lifecycle
- Active
- Stock
- 5078 件
- Package
- TSSOP-14
- 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 | AD5252BRUZ1 | AD5251BRU1-RL7 | Why it matters |
|---|---|---|---|
| Number of Positions | 256 | 64 | Determines the resolution of resistance adjustment; a 256-position device offers finer wiper granularity than a 64-position device, affecting achievable setpoints. |
| Number of Potentiometers | 2 | 2 | Indicates how many independent variable resistors are integrated; both provide dual-channel adjustment, but this must match the circuit's channel count. |
| End-to-End Resistance | 1 kΩ | 10 kΩ | Sets the nominal resistance range of the potentiometer; a 1 kΩ versus 10 kΩ device changes current loading and the usable resistance span in the application. |
| Interface Type | I²C | I²C | Defines the digital communication protocol used to set the wiper; both use I²C, so host controller compatibility is maintained. |
| Nonvolatile Memory | Yes (EEPROM) | Yes (EEPROM) | Determines whether the wiper setting is retained after power loss; both store settings in EEPROM, preserving configuration without reprogramming. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Specifies the allowable power supply window; matching ranges ensure both parts can operate from the same system rail. |
| Package / Mounting | TSSOP-14 (Surface Mount) | TSSOP-14 (Surface Mount) | Defines the physical footprint and assembly method; identical packages allow drop-in board placement without layout changes. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +105°C | Indicates the environmental range for reliable operation; matching ranges ensure both parts suit the same thermal environment. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5252BRUZ1 | AD5251BRU1-RL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Taper | Linear | Linear |
| Configuration | Potentiometer | Potentiometer |
| Number of Circuits | 2 | 2 |
| Number of Taps | 256 | 64 |
| Resistance(Ohms) | 1k | 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 | ±30% | ±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 key differences between the AD5252BRUZ1 and the AD5251BRU1-RL7?
The AD5252BRUZ1 is a dual-channel, 256-position digital potentiometer (2-channel, 8-bit), while the AD5251BRU1-RL7 is a single-channel, 64-position digital potentiometer (1-channel, 6-bit). The AD5252 offers two independently programmable resistors, whereas the AD5251 provides only one. Both are nonvolatile I2C-compatible devices from Analog Devices, but they differ in channel count, resolution, and package/pinout.
Are the AD5252BRUZ1 and AD5251BRU1-RL7 pin-to-pin compatible?
No. The AD5252BRUZ1 is supplied in a 14-lead TSSOP (RU-14 package), while the AD5251BRU1-RL7 is supplied in a 14-lead TSSOP as well, but the internal pin functions differ because the AD5252 has two resistor channels and the AD5251 has one. Pin assignments for the second channel and associated terminals are not equivalent, so they are not direct drop-in replacements.
Can the AD5251BRU1-RL7 be used as a substitute for the AD5252BRUZ1 in an existing design?
Not directly. The AD5251 has only one channel and 64 positions, whereas the AD5252 has two channels and 256 positions. Substitution would require redesigning the circuit to account for the missing second channel, reduced resolution, different register maps, and different I2C addressing. Always verify against the respective Analog Devices datasheets before considering any substitution.
What is the resolution and number of positions for each device?
The AD5252BRUZ1 provides 256 positions per channel (8-bit resolution) across two channels. The AD5251BRU1-RL7 provides 64 positions (6-bit resolution) on a single channel. These values are specified in the Analog Devices AD5251/AD5252 datasheet.
Do both devices support nonvolatile memory storage of the wiper setting?
Yes. Both the AD5252 and AD5251 are nonvolatile digital potentiometers that retain the wiper setting after power-down without requiring external memory. This is a shared feature of the AD5251/AD5252 family as documented by Analog Devices.
What digital interface do the AD5252BRUZ1 and AD5251BRU1-RL7 use?
Both devices use a 2-wire I2C-compatible serial interface. The AD5252 supports up to two hardware-addressable devices on the same bus, while the AD5251 supports a single device per address configuration, consistent with the channel count difference. Refer to the Analog Devices datasheet for exact I2C address pin strapping.
What are the typical end-to-end resistance options for these parts?
The AD5251/AD5252 family is available in standard end-to-end resistance values of 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ, depending on the specific orderable model. The exact resistance for AD5252BRUZ1 and AD5251BRU1-RL7 must be confirmed from the ordering guide in the Analog Devices datasheet, as the suffix does not encode resistance in the same way across all variants.
What supply voltage range do the AD5252BRUZ1 and AD5251BRU1-RL7 operate from?
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 AD5251/AD5252 datasheet. This makes them suitable for both 3 V and 5 V logic systems.