Part A
AD5252BRUZ1
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4418 PCS
- Package
- TSSOP-14
- Series
- Acquisition de données - potentiomètres numériques
Replacement verdict
Not a drop-in replacement
The AD5252BRUZ1 and AD5251BRUZ100 are not drop-in replacements for each other. Although both are dual-channel digital potentiometers from the same AD525x family in a TSSOP-14 package, they differ fundamentally in end-to-end resistance (1 kΩ vs 100 kΩ), number of programmable wiper positions (256 vs 64), and interface protocol (I²C vs SPI). These differences in resistance value, resolution, and control interface prevent direct functional substitution without circuit redesign and firmware modification.
Different end-to-end resistance
Different wiper resolution
Different control interface
Different command protocol
Parts at a glance
Part B
AD5251BRUZ100
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 8797 PCS
- Package
- TSSOP-14
- Series
- Acquisition de données - potentiomètres numériques
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 | AD5251BRUZ100 | Why it matters |
|---|---|---|---|
| Number of Positions | 256 | 64 | Determines the resolution of the digital potentiometer; a 256-position device offers finer wiper adjustment than a 64-position device. |
| End-to-End Resistance | 1 kΩ | 100 kΩ | Sets the nominal resistance range of the potentiometer, directly affecting the current and voltage levels in the target circuit. |
| Number of Potentiometers | 2 | 1 | Indicates how many independent variable resistors are integrated in the package, affecting channel count and board space requirements. |
| Interface Type | I²C | Up/Down (3-wire) | Defines the digital control protocol; I²C allows addressable multi-device buses while up/down requires dedicated control lines. |
| Nonvolatile Memory | Yes (EEPROM) | No | Determines whether the wiper setting is retained after power loss, which is critical for applications requiring a known startup state. |
| Wiper Resistance | ~60 Ω (typical) | ~200 Ω (typical) | Affects the minimum achievable resistance and the accuracy of the potentiometer, especially at low resistance settings. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines the compatible power supply rails; matching ranges allow similar system-level integration. |
| Package Type | 14-Lead TSSOP | 14-Lead TSSOP | Determines the PCB footprint and assembly compatibility; identical packages simplify layout substitution. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +105°C | Specifies the environmental conditions under which the device operates reliably, affecting suitability for industrial applications. |
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 | AD5251BRUZ100 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Taper | Linear | Linear |
| Configuration | Potentiometer | Potentiometer |
| Number of Circuits | 2 | 2 |
| Number of Taps | 256 | 64 |
| Resistance(Ohms) | 1k | 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 | ±30% | ±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 AD5252BRUZ1 and AD5251BRUZ100?
The AD5252BRUZ1 is a dual-channel, 8-bit digital potentiometer with a 1 kΩ end-to-end resistance, while the AD5251BRUZ100 is a dual-channel, 8-bit digital potentiometer with a 100 kΩ end-to-end resistance. Both are I2C-compatible, nonvolatile memory digital potentiometers from Analog Devices in a 14-lead TSSOP package.
Are the AD5252BRUZ1 and AD5251BRUZ100 pin-compatible?
Yes, both devices are offered in the same 14-lead TSSOP (RU-14) package and share the same pinout, allowing them to be used in the same PCB footprint. However, the different end-to-end resistance values affect circuit performance and must be validated for the target application.
What is the resolution of the AD5252BRUZ1 and AD5251BRUZ100?
Both the AD5252BRUZ1 and AD5251BRUZ100 are 8-bit digital potentiometers, providing 256 positions (0 to 255) for wiper adjustment.
What is the end-to-end resistance of each device?
The AD5252BRUZ1 has a 1 kΩ nominal end-to-end resistance, while the AD5251BRUZ100 has a 100 kΩ nominal end-to-end resistance. The resistance value is indicated by the suffix after the base part number.
Do both devices have nonvolatile memory for wiper settings?
Yes, both the AD5252BRUZ1 and AD5251BRUZ100 feature nonvolatile EEPROM memory that retains the wiper setting after power is removed, allowing the device to power up in the previously stored wiper position.
What is the supply voltage range for the AD5252BRUZ1 and AD5251BRUZ100?
Both devices operate from a single 2.7 V to 5.5 V supply, or from dual ±2.5 V supplies, making them suitable for a variety of low-voltage and mixed-supply applications.
What digital interface do the AD5252BRUZ1 and AD5251BRUZ100 use?
Both devices use a 2-wire I2C-compatible serial interface, supporting standard and fast modes up to 400 kHz, and include an address pin that allows up to two devices on the same bus.
Can the AD5252BRUZ1 and AD5251BRUZ100 be used interchangeably in a design?
They are not directly interchangeable without circuit redesign because the end-to-end resistance differs by a factor of 100 (1 kΩ vs. 100 kΩ). This affects current, voltage division, and power dissipation, so the replacement must be validated against the specific application requirements.