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 AD5251BRU1 and AD5252BRUZ1 are both dual-channel digital potentiometers from the same Analog Devices AD525x family, sharing a 14-lead TSSOP footprint and I²C interface. However, they differ in nominal resistance, memory type, and temperature grade, so the AD5252BRUZ1 is a functional replacement candidate only after validating the resistance value, nonvolatile memory requirement, and operating temperature range against the target application.
Resistance Value
Validation required
Memory Type
Validation required
Package Type
High match
Operating Temperature
Validation required
Parts at a glance
Part B
AD5251BRU1
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 9098 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 | AD5251BRU1 | 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 Potentiometers | 2 | 2 | Indicates how many independent variable resistors are integrated in the package, affecting channel count in a design. |
| Interface Type | I2C | Up/Down (3-wire) | Defines the digital control protocol; I2C allows addressable bus control while up/down requires dedicated increment/decrement pins. |
| Resistance Value | 1 kOhm | 10 kOhm | Sets the nominal end-to-end resistance, which must match the impedance requirements of the surrounding circuit. |
| Nonvolatile Memory | Yes (EEPROM) | No | Nonvolatile storage retains the wiper setting across power cycles, eliminating the need to reprogram on startup. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines the operating voltage window; both parts are compatible with common 3 V and 5 V logic systems. |
| Package / Mounting | 14-TSSOP (Surface Mount) | 14-TSSOP (Surface Mount) | Physical footprint and mounting style must match the PCB layout for drop-in compatibility. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +85°C | Determines the environments in which the device can reliably operate; a wider range supports harsher industrial conditions. |
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 | AD5251BRU1 |
|---|---|---|
| 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 the AD5251BRU1?
The AD5252BRUZ1 is a dual-channel, 256-position digital potentiometer (2.5 kΩ, 10 kΩ, 50 kΩ, or 100 kΩ options) with an I²C interface, while the AD5251BRU1 is a dual-channel, 64-position digital potentiometer (10 kΩ, 50 kΩ, or 100 kΩ options) with an I²C interface. The AD5252 offers higher resolution (256 positions vs. 64 positions) and includes a 2.5 kΩ end-to-end resistance option not available on the AD5251. Both are specified for operation from −40°C to +85°C and come in a 14-lead TSSOP package.
Are the AD5252BRUZ1 and AD5251BRU1 pin-compatible?
Yes, both devices are offered in the same 14-lead TSSOP (RU-14) package and share the same pinout for the I²C interface, address pins, and potentiometer terminals. However, the internal register map and wiper resolution differ, so firmware must be adjusted accordingly.
Can the AD5252BRUZ1 directly replace the AD5251BRU1 in an existing design?
Not without validation. Although the packages and pinouts are identical, the AD5252BRUZ1 provides 256 wiper positions versus 64 positions on the AD5251BRU1. The I²C command structure and register addresses are also different. A direct drop-in replacement requires firmware changes and verification that the higher resolution does not adversely affect the circuit.
What is the end-to-end resistance range available for each part?
The AD5252BRUZ1 is available in 2.5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ options. The AD5251BRU1 is available in 10 kΩ, 50 kΩ, and 100 kΩ options. The 2.5 kΩ option is unique to the AD5252 family.
What is the wiper resistance and its typical tolerance for these devices?
Both the AD5252BRUZ1 and AD5251BRU1 have a typical wiper resistance of 50 Ω (at 5 V, 25°C). The end-to-end resistance tolerance is typically ±20% for the 10 kΩ, 50 kΩ, and 100 kΩ versions, and ±30% for the 2.5 kΩ version of the AD5252BRUZ1.
Do both parts support the same I²C interface speed and logic levels?
Yes, both devices support standard-mode (100 kHz) and fast-mode (400 kHz) I²C communication. The logic input levels are compatible with 3 V and 5 V CMOS logic, with VIH = 0.7 × VDD and VIL = 0.3 × VDD.
What are the operating temperature ranges for the AD5252BRUZ1 and AD5251BRU1?
Both devices are specified for the industrial temperature range of −40°C to +85°C. They are not rated for automotive or extended temperature ranges unless explicitly stated in the manufacturer datasheet.
Are there differences in power supply requirements between the two parts?
No, both the AD5252BRUZ1 and AD5251BRU1 operate from a single 2.7 V to 5.5 V supply. The supply current is typically 5 µA in idle mode and higher during I²C communication, with no significant difference between the two devices.