Part A
AD5252BRUZ1
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4418 PCS
- Package
- TSSOP-14
- Series
- Data Acquisition - Digital Potentiometers
Replacement verdict
Not a drop-in replacement
The AD5252BRUZ1 and AD5251BRU10 are not functionally interchangeable. The AD5252BRUZ1 is a dual-channel 256-position digital potentiometer, while the AD5251BRU10 is a single-channel 1024-position device. They differ in channel count, resolution, nominal resistance, and interface protocol, making direct substitution impractical without significant design changes.
Different channel count
Different resolution
Different nominal resistance
Different interface protocol
Parts at a glance
Part B
AD5251BRU10
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4849 PCS
- Package
- TSSOP-14
- 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 | AD5252BRUZ1 | AD5251BRU10 | Why it matters |
|---|---|---|---|
| Number of Positions | 256 | 64 | Determines the resolution of the digital potentiometer; a 256-position device offers finer adjustment granularity than a 64-position device. |
| Number of Taps | 256 | 64 | The tap count defines the number of discrete resistance settings available, directly affecting wiper resolution and step size. |
| Resistance Value | 1 kΩ | 10 kΩ | The end-to-end resistance sets the impedance range of the potentiometer and must match the circuit's design requirements for proper signal levels. |
| Interface Type | I²C | Up/Down (3-wire) | The control interface determines how the host controller communicates with the device; I²C and up/down interfaces are not directly interchangeable. |
| Memory Type | Non-volatile EEPROM | Volatile | Non-volatile memory retains the wiper setting after power loss, while volatile memory requires re-initialization on each power-up. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Both devices operate over the same supply range, allowing similar power supply design, though other differences prevent direct substitution. |
| Package Type | 14-Lead TSSOP | 14-Lead TSSOP | Package compatibility affects PCB footprint and assembly; identical packages simplify board layout changes. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +85°C | The temperature range determines suitability for harsh environments; a wider range provides more application flexibility. |
| Wiper Resistance | ~50 Ω (typical) | ~200 Ω (typical) | Lower wiper resistance reduces signal attenuation and improves accuracy in voltage divider and rheostat configurations. |
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 | AD5251BRU10 |
|---|---|---|
| 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 | 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 | ±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 AD5251BRU10?
The AD5252BRUZ1 is a dual-channel, 256-position digital potentiometer (8-bit resolution) with a 1 kΩ end-to-end resistance, while the AD5251BRU10 is a dual-channel, 64-position digital potentiometer (6-bit resolution) with a 10 kΩ end-to-end resistance. Both are nonvolatile I²C-compatible devices in 14-lead TSSOP packages, but they differ in resolution, resistance value, and wiper settings.
Are the AD5252BRUZ1 and AD5251BRU10 pin-compatible?
Yes, both devices are offered in a 14-lead TSSOP (RU-14) package and share the same pinout for the I²C interface, address pins, and power supplies. However, the internal wiper resistance and end-to-end resistance differ, so circuit performance must be validated before substitution.
What is the resolution of each device?
The AD5252BRUZ1 provides 256 positions (8-bit resolution) per channel, while the AD5251BRU10 provides 64 positions (6-bit resolution) per channel. This affects the step size and the number of programmable wiper settings available.
What are the end-to-end resistance values of these digital potentiometers?
The AD5252BRUZ1 has a 1 kΩ nominal end-to-end resistance. The AD5251BRU10 has a 10 kΩ nominal end-to-end resistance. These values determine the maximum resistance range and the wiper resistance ratio for each device.
Do both devices support nonvolatile memory storage of wiper settings?
Yes, both the AD5252BRUZ1 and AD5251BRU10 include nonvolatile EEPROM that retains the wiper position after power-down, allowing the devices to power up in the previously stored wiper setting without requiring reprogramming.
What is the I²C interface speed and supply voltage range for these devices?
Both devices support I²C-compatible serial interfaces with standard (100 kHz) and fast (400 kHz) modes. They operate from a single 2.7 V to 5.5 V supply, making them suitable for low-voltage and standard logic-level systems.
Can the AD5252BRUZ1 and AD5251BRU10 be used in rheostat or potentiometer mode?
Yes, both devices can be configured in either potentiometer mode (using all three terminals: A, B, and W) or rheostat mode (using only terminal W and one end terminal). The mode selection depends on the application circuit and desired resistance behavior.
What are the typical applications for these digital potentiometers?
Typical applications include gain and offset adjustment, programmable voltage references, adjustable power supplies, LCD panel calibration, and sensor trimming. The AD5252BRUZ1 with 1 kΩ and 256 positions is suited for finer resolution in low-resistance circuits, while the AD5251BRU10 with 10 kΩ and 64 positions is better for higher resistance ranges where fewer steps are acceptable.