Part A
AD5252BRUZ1
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 4418 PCS
- Package
- TSSOP-14
- Series
- 데이터 수집 - 디지털 전위기
Replacement verdict
Not a drop-in replacement
The AD5252BRUZ1 and AD5251BRU50-RL7 are not functionally interchangeable. The AD5252BRUZ1 is a dual-channel 1 kΩ digital potentiometer, while the AD5251BRU50-RL7 is a single-channel 50 kΩ device. The differences in channel count, end-to-end resistance, and interface configuration prevent direct substitution without circuit redesign and firmware modification.
Different channel count
Different end-to-end resistance
Different interface protocol
Different memory architecture
Parts at a glance
Part B
AD5251BRU50-RL7
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 7894 PCS
- Package
- TSSOP-14
- Series
- 데이터 수집 - 디지털 전위기
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 | AD5251BRU50-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 Resistor Taps | 256 | 64 | Tap count directly defines the number of selectable resistance steps and thus the achievable adjustment precision. |
| End-to-End Resistance | 1 kOhm | 50 kOhm | The nominal resistance value must match the circuit's impedance requirements for proper signal or bias level control. |
| Interface Type | I2C | Up/Down (3-wire) | The digital control interface must be compatible with the host controller; 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. |
| Package / Mounting | 14-TSSOP | 14-TSSOP | Package and pinout must match the PCB footprint for a drop-in replacement. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | The operating supply range must encompass the system rail voltage to ensure reliable operation. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +85°C | The temperature rating must cover the application's ambient conditions; a narrower range may limit use in harsh environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5252BRUZ1 | AD5251BRU50-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 | 50k |
| 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 AD5251BRU50-RL7 digital potentiometers?
The AD5252BRUZ1 is a dual-channel, 256-position digital potentiometer with a 1 kΩ end-to-end resistance, while the AD5251BRU50-RL7 is a dual-channel, 64-position digital potentiometer with a 50 kΩ end-to-end resistance. Both are nonvolatile, I²C-compatible devices from Analog Devices, but they differ in resolution, resistance value, and ordering packaging.
Are the AD5252BRUZ1 and AD5251BRU50-RL7 pin-compatible?
Both devices are offered in 14-lead TSSOP packages (RU suffix). However, pin compatibility cannot be assumed solely from package type; designers must verify the pinout in the respective Analog Devices datasheets, as internal function assignments may differ between the 256-position AD5252 and 64-position AD5251 families.
What is the resolution difference between the AD5252BRUZ1 and AD5251BRU50-RL7?
The AD5252BRUZ1 provides 256 positions (8-bit resolution) per channel, whereas the AD5251BRU50-RL7 provides 64 positions (6-bit resolution) per channel. This affects wiper setting granularity in applications such as gain adjustment or offset trimming.
Can the AD5251BRU50-RL7 be used as a drop-in replacement for the AD5252BRUZ1?
No. The two devices differ in end-to-end resistance (50 kΩ vs. 1 kΩ), resolution (64 vs. 256 positions), and potentially in register maps and I²C addressing. A direct drop-in replacement is not supported without circuit redesign and firmware adjustment.
What is the end-to-end resistance tolerance of each device?
According to Analog Devices datasheets, the AD5252BRUZ1 offers a 1 kΩ nominal resistance with a specified tolerance, and the AD5251BRU50-RL7 offers a 50 kΩ nominal resistance with its own tolerance rating. Exact tolerance percentages should be confirmed from the respective manufacturer datasheets, as they may vary by model and temperature range.
Do both devices support nonvolatile wiper memory?
Yes. Both the AD5252 and AD5251 families are nonvolatile digital potentiometers, meaning the wiper setting is retained after power-down without requiring external backup. This is a shared feature of the Analog Devices AD525x series.
What interface do the AD5252BRUZ1 and AD5251BRU50-RL7 use?
Both devices use a 2-wire I²C-compatible serial interface for programming the wiper position and reading back register contents. The maximum clock speed and specific timing parameters should be verified from the official Analog Devices datasheets for each part number.