Part A
AD5235BRUZ25
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5427 Stückzahl
- Package
- TSSOP-16
- Series
- Datenerfassung
Replacement verdict
Not a drop-in replacement
The AD5235BRUZ25 and AD5232BRU10 are not drop-in replacements for each other. Although both are dual-channel digital potentiometers from Analog Devices, they differ in resolution, nominal resistance, interface protocol, and package footprint, requiring circuit and firmware redesign before substitution.
Different resolution
Different end-to-end resistance
Different interface protocol
Different package footprint
Parts at a glance
Part B
AD5232BRU10
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5571 Stückzahl
- Package
- TSSOP-16
- Series
- Datenerfassung
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD5235BRUZ25 | AD5232BRU10 | Why it matters |
|---|---|---|---|
| Number of Positions | 1024 | 256 | Determines the resolution of the digital potentiometer; a higher number of positions allows finer adjustment of resistance. |
| Nominal Resistance | 25 kΩ | 10 kΩ | Sets the end-to-end resistance value, which must match the circuit's impedance requirements for proper operation. |
| Number of Potentiometers | 2 | 2 | Indicates how many independent variable resistors are integrated in a single package, affecting channel count and board space. |
| Interface Type | SPI | I²C | Defines the digital communication protocol required by the host controller, which must be compatible with the system bus. |
| Nonvolatile Memory | Yes (EEPROM) | No | Nonvolatile memory retains the wiper setting after power loss, eliminating the need to reprogram the device on startup. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Specifies the operating voltage range, which must align with the system power rails for reliable operation. |
| Resistance Tolerance | ±30% | ±30% | Indicates the variation in end-to-end resistance, affecting absolute accuracy in applications requiring precise resistance values. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Defines the environmental conditions under which the device is guaranteed to function within specification. |
| Package Type | 16-Lead TSSOP | 16-Lead TSSOP | Determines the physical footprint and mounting style, which must be compatible with the PCB layout. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5235BRUZ25 | AD5232BRU10 |
|---|---|---|
| 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 | 1024 | 256 |
| Resistance(Ohms) | 25k | 10k |
| Interface | SPI | SPI |
| Memory Type | Non-Volatile | Non-Volatile |
| Voltage - Supply | 2.7V ~ 5V, ±2.25V ~ 2.75V | 2.7V ~ 5.5V, ±2.25V ~ 2.75V |
| Features | Cascade Pin | Cascade Pin |
| Tolerance | ±8% | -40%, +20% |
| Temperature Coefficient(Typ) | 35ppm/°C | 600ppm/°C |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD5235BRUZ25 and AD5232BRU10?
The AD5235BRUZ25 is a dual-channel, 1024-position digital potentiometer with a 25 kΩ end-to-end resistance, while the AD5232BRU10 is a dual-channel, 256-position digital potentiometer with a 10 kΩ end-to-end resistance. The AD5235 offers higher resolution and a different resistance value compared to the AD5232.
Are the AD5235BRUZ25 and AD5232BRU10 pin-compatible?
No, they are not pin-compatible. The AD5235BRUZ25 is available in a 16-lead TSSOP package, whereas the AD5232BRU10 is available in a 16-lead TSSOP package as well, but the pin functions and internal register architecture differ, so they cannot be used interchangeably without design changes.
What is the resolution of each digital potentiometer?
The AD5235BRUZ25 provides 1024 positions (10-bit resolution) per channel, while the AD5232BRU10 provides 256 positions (8-bit resolution) per channel.
What are the end-to-end resistance values of these two parts?
The AD5235BRUZ25 has a nominal end-to-end resistance of 25 kΩ, and the AD5232BRU10 has a nominal end-to-end resistance of 10 kΩ.
Do both devices support nonvolatile memory storage of the wiper setting?
Yes, both the AD5235 and AD5232 families include nonvolatile memory (EEPROM) that retains the wiper position after power-down, allowing the setting to be restored on power-up.
What is the typical supply voltage range for the AD5235BRUZ25 and AD5232BRU10?
Both devices operate from a single supply of 2.7 V to 5.5 V, or from dual supplies of ±2.5 V to ±2.7 V, as specified in the manufacturer datasheets.
Can the AD5235BRUZ25 directly replace the AD5232BRU10 in an existing design?
No, a direct replacement is not possible. The differences in resolution (1024 vs. 256 positions), end-to-end resistance (25 kΩ vs. 10 kΩ), and internal register mapping require firmware and hardware validation before substitution.
What communication interface do these digital potentiometers use?
Both the AD5235BRUZ25 and AD5232BRU10 use a 3-wire SPI-compatible serial interface for programming the wiper position and accessing the nonvolatile memory.