Part A
AD5235BRUZ25
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5427 PCS
- Package
- TSSOP-16
- Series
- Data Acquisition - Digital Potentiometers
Replacement verdict
Compatible functional replacement candidate
The AD5235BRUZ25 and AD5232BRU50 are both dual-channel digital potentiometers from Analog Devices, but they differ in resolution, nominal resistance, and interface speed. The AD5235BRUZ25 offers higher resolution and nonvolatile memory, while the AD5232BRU50 provides a higher resistance value. They are not pin-compatible drop-in replacements, but may serve as functional substitutes in applications where resolution and resistance tolerances permit.
Resolution
Validation required
Nominal Resistance
Not compatible
Channel Count
High match
Package Type
Validation required
Parts at a glance
Part B
AD5232BRU50
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2837 PCS
- Package
- TSSOP-16
- Series
- Data Acquisition - Digital Potentiometers
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 | AD5232BRU50 | 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. |
| End-to-End Resistance | 25 kΩ | 50 kΩ | Sets the nominal resistance range, directly affecting the voltage divider ratio and current handling in the target circuit. |
| Number of Potentiometers | 2 | 2 | Indicates how many independent variable resistors are integrated in a single package, impacting board space and channel count. |
| Interface Type | SPI | I2C | Defines the digital communication protocol required by the host controller, affecting firmware and pin compatibility. |
| Nonvolatile Memory | Yes (EEPROM) | No | Determines whether the wiper setting is retained after power loss, which is critical for applications requiring a known startup state. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Specifies the operating voltage window, ensuring compatibility with the system power rail. |
| Wiper Resistance | 50 Ω (typical) | 60 Ω (typical) | Adds a fixed series resistance at the wiper terminal, affecting accuracy in low-resistance settings. |
| Package / Mounting | 16-TSSOP (Surface Mount) | 16-TSSOP (Surface Mount) | Defines the physical footprint and assembly method, which must match the PCB layout for direct substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Ensures reliable operation across the intended environmental conditions of the application. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5235BRUZ25 | AD5232BRU50 |
|---|---|---|
| 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 | 50k |
| 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 AD5232BRU50?
The AD5235BRUZ25 is a dual-channel, 1024-position digital potentiometer with a 25 kΩ end-to-end resistance, while the AD5232BRU50 is a dual-channel, 256-position digital potentiometer with a 50 kΩ end-to-end resistance. The AD5235 offers four times the resolution and half the resistance value compared to the AD5232.
Are the AD5235BRUZ25 and AD5232BRU50 pin-compatible?
Both devices are offered in a 16-lead TSSOP package (RU-16 suffix), and Analog Devices datasheets indicate they share the same pinout for the dual-channel digital potentiometer function. However, designers should verify the specific pin functions and any differences in external component requirements against the respective datasheets before layout.
What is the resolution of each device?
The AD5235BRUZ25 provides 1024 positions (10-bit resolution) per channel, while the AD5232BRU50 provides 256 positions (8-bit resolution) per channel. This means the AD5235 can achieve finer adjustment steps in applications requiring precise resistance tuning.
What are the end-to-end resistance values and tolerances?
The AD5235BRUZ25 has a nominal end-to-end resistance of 25 kΩ, and the AD5232BRU50 has a nominal end-to-end resistance of 50 kΩ. Both devices typically specify a resistance tolerance of ±30% per the Analog Devices datasheets, which is common for digital potentiometers.
What is the interface type for these digital potentiometers?
Both the AD5235BRUZ25 and AD5232BRU50 use a 3-wire SPI-compatible serial interface for programming the wiper position and reading back data. This allows daisy-chaining of multiple devices and simplifies connection to most microcontrollers.
What are the typical operating voltage ranges for these devices?
The AD5235BRUZ25 operates from a single supply of 2.7 V to 5.5 V, or dual supplies of ±2.5 V. The AD5232BRU50 operates from a single supply of 2.7 V to 5.5 V, or dual supplies of ±2.5 V. Both are suitable for low-voltage portable and industrial applications.
Can the AD5235BRUZ25 and AD5232BRU50 be used in rheostat mode?
Yes, both devices can be configured in rheostat mode (two-terminal variable resistor) or potentiometer mode (three-terminal voltage divider). The wiper position is programmed digitally via the SPI interface, allowing precise resistance setting between terminal A and the wiper, or between terminal B and the wiper.
What are the typical applications for these digital potentiometers?
Typical applications include gain and offset adjustment in signal conditioning circuits, programmable filters, volume control, and sensor calibration. The AD5235BRUZ25 is better suited for applications requiring finer resolution, while the AD5232BRU50 may be adequate for less critical adjustments where 256 positions suffice.