Part A
AD5252BRUZ1
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4418 個数
- Package
- TSSOP-14
- Series
- データ取得 - デジタルポテンショメータ
Replacement verdict
Compatible functional replacement candidate
The AD5252BRUZ1 and AD5251BRUZ1 are dual-channel and single-channel digital potentiometers respectively from the same Analog Devices AD525x family, sharing identical TSSOP-14 footprint, I²C interface, nonvolatile memory architecture, and 256-position resolution. The AD5252BRUZ1 offers one additional independent channel, making it a viable functional replacement candidate for the AD5251BRUZ1 in most designs where the second channel can be left unconnected or repurposed, provided the system's I²C address configuration and power budget accommodate the difference.
Channel Count
Validation required
Package Type
High match
Interface Type
High match
Resolution
High match
Parts at a glance
Part B
AD5251BRUZ1
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3167 個数
- Package
- TSSOP-14
- Series
- データ取得 - デジタルポテンショメータ
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 | AD5251BRUZ1 | 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, affecting setting accuracy. |
| Number of Resistor Taps | 256 | 64 | Directly tied to the number of wiper positions and thus the achievable resistance resolution in the application. |
| Interface Type | I2C | I2C | Both use I2C, so host communication protocol compatibility is maintained between the two parts. |
| Resistance Value | 1 kOhm | 1 kOhm | End-to-end resistance affects the current handling and voltage divider ratios in the target circuit. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines the compatible power rails; matching ranges allow the parts to be used in the same system supply conditions. |
| Package / Mounting | TSSOP-14 / Surface Mount | TSSOP-14 / Surface Mount | Identical package and mounting allow direct board-level substitution without layout changes. |
| Operating Temperature Range | -40 C to +85 C | -40 C to +85 C | Ensures both devices can operate in the same environmental conditions for industrial and commercial applications. |
| Nonvolatile Memory | Yes (EEPROM) | Yes (EEPROM) | Retains wiper setting after power loss, which is important for applications requiring a known startup state. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5252BRUZ1 | AD5251BRUZ1 |
|---|---|---|
| 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 | 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 AD5251BRUZ1 digital potentiometers?
The AD5252BRUZ1 is a dual-channel, 256-position digital potentiometer, while the AD5251BRUZ1 is a dual-channel, 64-position digital potentiometer. Both are 1 kΩ, nonvolatile, I²C-compatible devices in a 14-lead TSSOP package, but the AD5252 offers four times the wiper resolution of the AD5251.
Are the AD5252BRUZ1 and AD5251BRUZ1 pin-compatible?
Yes. Both devices are specified in the same 14-lead TSSOP (RU-14) package and share the same pinout, including I²C bus pins, address pins, and wiper terminals. This allows a common PCB footprint, but firmware must account for the different wiper position counts.
What is the end-to-end resistance of the AD5252BRUZ1 and AD5251BRUZ1?
Both the AD5252BRUZ1 and AD5251BRUZ1 are offered in a 1 kΩ end-to-end resistance option, as indicated by the "1" suffix in the ordering code. Other resistance options exist in the AD5251/AD5252 families, but the BRUZ1 variants specifically denote the 1 kΩ version.
How many wiper positions does each device provide?
The AD5252BRUZ1 provides 256 positions per channel (8-bit resolution), while the AD5251BRUZ1 provides 64 positions per channel (6-bit resolution). Both have two independent channels.
Do the AD5252BRUZ1 and AD5251BRUZ1 have nonvolatile memory?
Yes. Both devices include nonvolatile EEPROM that stores the wiper setting, allowing the potentiometer to power up in the last programmed position without requiring external intervention.
What digital interface do the AD5252BRUZ1 and AD5251BRUZ1 use?
Both devices use a 2-wire I²C-compatible serial interface. The AD5252 supports standard and fast I²C modes, and the AD5251 uses the same protocol, though the command set and data byte format differ due to the different resolution.
Can the AD5251BRUZ1 be used as a drop-in replacement for the AD5252BRUZ1 in an existing design?
Hardware-wise, the pinout and package are identical, so the AD5251BRUZ1 can be placed on the same footprint. However, firmware must be modified because the AD5251 has only 64 wiper positions versus 256 on the AD5252, and the I²C data format for setting the wiper position differs. A direct drop-in without firmware changes is not recommended.
What are the typical applications for the AD5252BRUZ1 and AD5251BRUZ1?
Both are used for digital volume control, gain adjustment, offset trimming, and programmable voltage references. The AD5252BRUZ1 is preferred where finer resolution is needed, while the AD5251BRUZ1 suits cost-sensitive or lower-resolution applications.