Part A
AD5252BRUZ1
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4418 PCS
- Package
- TSSOP-14
- Series
- Acquisição de dados - Potenciômetros Digitais
Replacement verdict
Not a drop-in replacement
The AD5252BRUZ1 and AD5251BRU10-RL7 are not drop-in replacements for each other. They differ in channel count, nominal resistance, and interface protocol, and they are supplied in different package types. Each must be evaluated against the target design's digital interface, rheostat configuration, and board layout requirements before substitution.
Different channel count
Different nominal resistance
Different interface protocol
Different package type
Parts at a glance
Part B
AD5251BRU10-RL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8102 PCS
- Package
- TSSOP-14
- 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 | AD5252BRUZ1 | AD5251BRU10-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. |
| Number of Potentiometers | 2 | 2 | Indicates how many independent variable resistors are integrated in the package, affecting channel count in a design. |
| End-to-End Resistance | 1 kΩ | 10 kΩ | Sets the nominal full-scale resistance, which must match the impedance requirements of the surrounding circuit. |
| Interface Type | I²C | I²C | Defines the digital communication protocol used to program the wiper position; both use I²C but timing and address options may differ. |
| Memory Type | Nonvolatile (EEPROM) | Nonvolatile (EEPROM) | Determines whether the wiper setting is retained after power loss, which is critical for calibration and default-state behavior. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Specifies the allowable power-supply window; compatibility with the system rail is essential for proper operation. |
| Package / Mounting | 14-TSSOP | 14-TSSOP | Affects PCB footprint and assembly; matching packages allow drop-in replacement without layout changes. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +105°C | Defines the environmental limits for reliable operation in industrial or automotive applications. |
| Wiper Resistance | ~50 Ω (typical) | ~50 Ω (typical) | Adds a fixed series resistance in the signal path, influencing accuracy in low-resistance settings. |
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-RL7 |
|---|---|---|
| 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-RL7 digital potentiometers?
The AD5252BRUZ1 is a dual-channel, 256-position digital potentiometer with a 1 kΩ end-to-end resistance, while the AD5251BRU10-RL7 is a dual-channel, 1024-position digital potentiometer with a 10 kΩ end-to-end resistance. Both are I²C-compatible, nonvolatile memory digital potentiometers from Analog Devices, but they differ in resolution, resistance value, and ordering packaging.
Are the AD5252BRUZ1 and AD5251BRU10-RL7 pin-compatible?
Both devices are offered in 14-lead TSSOP packages (RU-14 suffix), and their pin functions are largely equivalent for I²C communication, address selection, and potentiometer terminals. However, designers must verify the specific pinout in the respective datasheets because the AD5251 and AD5252 may differ in hardware address pin configuration and write-protect functionality.
Can the AD5252BRUZ1 be used as a drop-in replacement for the AD5251BRU10-RL7?
No, they are not direct drop-in replacements. The AD5252BRUZ1 has 256 positions and 1 kΩ resistance, whereas the AD5251BRU10-RL7 has 1024 positions and 10 kΩ resistance. The different resolution and resistance values affect wiper settings, voltage divider ratios, and circuit behavior, so firmware and hardware must be revalidated before substitution.
What is the resolution and number of positions for each device?
The AD5252BRUZ1 provides 256 positions (8-bit resolution) per channel. The AD5251BRU10-RL7 provides 1024 positions (10-bit resolution) per channel. Both are dual-channel digital potentiometers.
What are the end-to-end resistance values of these two digital potentiometers?
The AD5252BRUZ1 has a 1 kΩ nominal end-to-end resistance. The AD5251BRU10-RL7 has a 10 kΩ nominal end-to-end resistance. These values are specified in the Analog Devices datasheets for each part number.
Do both devices support nonvolatile wiper memory?
Yes, both the AD5252 and AD5251 families include nonvolatile memory (EEPROM) that retains the wiper setting after power-down. This allows the potentiometer to power up in a known state without requiring external microcontroller initialization.
What is the I²C interface compatibility of the AD5252BRUZ1 and AD5251BRU10-RL7?
Both devices use a 2-wire I²C-compatible serial interface. The AD5252BRUZ1 and AD5251BRU10-RL7 support standard and fast I²C modes, with hardware address pins allowing multiple devices on the same bus. Exact timing and voltage-level specifications should be confirmed in the respective datasheets.
What are the operating voltage ranges for these digital potentiometers?
The AD5252BRUZ1 and AD5251BRU10-RL7 both operate from a single 2.7 V to 5.5 V supply, or from dual ±2.5 V supplies, as specified by Analog Devices. Designers should verify the exact supply range and logic thresholds in the official datasheet for each part.