Part A
AD5254BRUZ100
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4724 PCS
- Package
- TSSOP-20
- Series
- Data Acquisition - Digital Potentiometers
Replacement verdict
Compatible functional replacement candidate
The AD5254BRUZ100 and AD5253BRU100 are both quad-channel digital potentiometers from Analog Devices with comparable resolution and interface characteristics, making them strong functional replacement candidates. However, the AD5254BRUZ100 offers 256-position resolution and nonvolatile memory storage, while the AD5253BRU100 provides 64-position resolution with volatile memory only. Designers must verify the required resolution, memory retention behavior, and end-to-end resistance tolerance before substituting one for the other in a given application.
Channel Count
High match
Resolution
Validation required
Memory Type
Validation required
Interface Type
High match
Parts at a glance
Part B
AD5253BRU100
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8814 PCS
- Package
- TSSOP-20
- 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 | AD5254BRUZ100 | AD5253BRU100 | Why it matters |
|---|---|---|---|
| Number of Positions | 256 | 64 | Determines the wiper resolution; a 256-position device offers finer adjustment granularity than a 64-position device. |
| Number of Potentiometers | 4 | 4 | Indicates how many independent resistor channels are available in a single package. |
| End-to-End Resistance | 100 kΩ | 100 kΩ | Sets the nominal resistance range of each potentiometer channel, affecting signal level and current handling. |
| Interface Type | I²C | I²C | Defines the digital communication protocol used to control the device from a host controller. |
| Wiper Resistance | 200 Ω (typical) | 200 Ω (typical) | Adds a fixed series resistance in the signal path, influencing accuracy in low-resistance settings. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Determines compatibility with the system power rail and logic levels. |
| Nonvolatile Memory | Yes (EEPROM) | Yes (EEPROM) | Allows the wiper setting to be retained across power cycles without reprogramming. |
| Package Type | 20-Lead TSSOP | 20-Lead TSSOP | Affects PCB footprint, thermal performance, and assembly compatibility. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Specifies the environmental conditions under which the device is guaranteed to operate reliably. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5254BRUZ100 | AD5253BRU100 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Taper | Linear | Linear |
| Configuration | Potentiometer | Potentiometer |
| Number of Circuits | 4 | 4 |
| Number of Taps | 256 | 64 |
| Resistance(Ohms) | 100k | 100k |
| 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 | ±20% | ±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 AD5254BRUZ100 and AD5253BRU100?
The AD5254BRUZ100 is a quad-channel, 100 kΩ, 256-position digital potentiometer with nonvolatile memory (EEPROM) and an I²C interface, supplied in a 20-lead TSSOP package. The AD5253BRU100 is a quad-channel, 100 kΩ, 64-position digital potentiometer with nonvolatile memory and an I²C interface, supplied in a 20-lead TSSOP package. The primary differences are resolution (256 positions vs. 64 positions) and the resulting wiper resistance and end-to-end resistance tolerance specifications.
Are the AD5254BRUZ100 and AD5253BRU100 pin-compatible?
Both devices are offered in a 20-lead TSSOP package, but pin compatibility cannot be assumed solely from the package type. Designers must verify the pinout and function of each pin against the respective manufacturer datasheets before considering a layout substitution.
Can the AD5254BRUZ100 and AD5253BRU100 be used as direct replacements for each other?
No. Although both are quad-channel, 100 kΩ, I²C-compatible digital potentiometers with nonvolatile memory, they differ in resolution (256 positions for the AD5254BRUZ100 vs. 64 positions for the AD5253BRU100). This affects the number of programmable steps, the wiper resistance at each step, and the achievable adjustment granularity. A direct replacement requires validating these differences against the target design requirements.
What is the end-to-end resistance of the AD5254BRUZ100 and AD5253BRU100?
Both the AD5254BRUZ100 and AD5253BRU100 are specified with a 100 kΩ nominal end-to-end resistance, as indicated by the "100" suffix in their part numbers. Actual resistance tolerance and temperature coefficient should be confirmed from the official manufacturer datasheet for each device.
Do both devices support nonvolatile wiper memory?
Yes. Both the AD5254BRUZ100 and AD5253BRU100 include nonvolatile memory (EEPROM) that retains the wiper setting after power is removed, allowing the devices to power up in a known state without external intervention.
What digital interface do the AD5254BRUZ100 and AD5253BRU100 use?
Both devices use a 2-wire I²C-compatible serial interface for programming the wiper position and accessing the nonvolatile memory. The maximum clock frequency and timing specifications should be verified from the respective manufacturer datasheets.
How does the resolution difference affect circuit performance when comparing the AD5254BRUZ100 and AD5253BRU100?
The AD5254BRUZ100 provides 256 wiper positions, while the AD5253BRU100 provides 64 wiper positions. For a 100 kΩ end-to-end resistance, this results in a nominal step size of approximately 390 Ω for the AD5254BRUZ100 and approximately 1.56 kΩ for the AD5253BRU100. Circuits requiring finer adjustment granularity should account for this difference.
Are the AD5254BRUZ100 and AD5253BRU100 RoHS compliant?
The "Z" suffix in AD5254BRUZ100 indicates a RoHS-compliant package option from Analog Devices. The AD5253BRU100 part number as written does not include the "Z" suffix, so its RoHS status should be confirmed from the manufacturer's ordering guide or the specific product datasheet before assuming compliance.