Part A
AD5243BRMZ100
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5248 PCS
- Package
- MSOP-10
- Series
- Data Acquisition - Digital Potentiometers
Replacement verdict
Compatible functional replacement candidate
The AD5243BRMZ100 and AD5243BRM2.5 are both dual-channel digital potentiometers from the AD5243 series, sharing identical I²C interfaces, package types, and supply voltage ranges. However, their end-to-end resistance values differ significantly (100 kΩ vs. 2.5 kΩ), which directly affects current handling, power dissipation, and circuit behavior. While they are functionally compatible in terms of control interface and pinout, the resistance difference makes them non-interchangeable in applications where the specific resistance value is critical to circuit performance. Design validation is strongly recommended before substituting one for the other.
End-to-End Resistance
Not compatible
Package Type
High match
Interface Type
High match
Supply Voltage Range
Validation required
Parts at a glance
Part B
AD5243BRM2.5
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9022 PCS
- Package
- MSOP-10
- 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 | AD5243BRMZ100 | AD5243BRM2.5 | Why it matters |
|---|---|---|---|
| End-to-End Resistance | 100 kΩ | 2.5 kΩ | Determines the nominal resistance range of the digital potentiometer and directly affects the current through and voltage across the wiper circuit. |
| Number of Positions | 256 | 256 | Defines the wiper resolution; identical resolution means both parts offer the same number of adjustable steps. |
| Interface Type | I2C | I2C | Both devices use the same digital control interface, so they are interchangeable from a communication protocol standpoint. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Matching supply ranges ensure both parts can operate in the same system power environment. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical temperature ratings mean both parts are suitable for the same industrial and automotive temperature environments. |
| Package / Mounting Type | 10-Lead MSOP, Surface Mount | 10-Lead MSOP, Surface Mount | Same package and mounting style allow direct PCB footprint compatibility without layout changes. |
| Wiper Resistance (Typical) | 60 Ω | 160 Ω | Wiper resistance adds to the programmed resistance and affects accuracy, especially at low resistance settings; the lower-resistance part has a relatively higher wiper contribution. |
| Nominal Resistance Tolerance | ±30 % | ±30 % | Tolerance indicates how much the actual end-to-end resistance can deviate from the nominal value, impacting absolute resistance accuracy. |
| Typical Application Suitability | Higher-impedance signal trimming, low-power divider networks | Low-resistance trimming, current-setting, and low-voltage divider applications | The resistance value dictates which circuit impedances and current levels each part can practically support, making them non-equivalent in many designs. |
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 | AD5243BRMZ100 | AD5243BRM2.5 |
|---|---|---|
| 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 | 256 |
| Resistance(Ohms) | 100k | 2.5k |
| Interface | I²C | I²C |
| Memory Type | Volatile | Volatile |
| Voltage - Supply | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Tolerance | -20%, +55% | -20%, +55% |
| Temperature Coefficient(Typ) | 35ppm/°C | 35ppm/°C |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
Frequently asked questions
What is the main difference between the AD5243BRMZ100 and the AD5243BRM2.5?
The primary difference is the end-to-end resistance value. The AD5243BRMZ100 has a 100 kΩ nominal resistance, while the AD5243BRM2.5 has a 2.5 kΩ nominal resistance. Both are dual-channel, 256-position digital potentiometers from Analog Devices in a 10-lead MSOP package.
Are the AD5243BRMZ100 and AD5243BRM2.5 pin-compatible?
Yes. Both devices are offered in the same 10-lead MSOP (RM) package and share the same pinout, including the I²C-compatible serial interface, address pins, and dual wiper terminals. This allows them to be used in the same PCB footprint.
Can the AD5243BRMZ100 and AD5243BRM2.5 be used interchangeably in a design?
Not directly. Although they are pin-compatible, the 40:1 difference in end-to-end resistance (100 kΩ vs. 2.5 kΩ) significantly affects wiper resistance, power dissipation, and the RC time constants in the target circuit. The replacement must be validated against the specific application requirements.
What is the resolution and number of positions for both devices?
Both the AD5243BRMZ100 and AD5243BRM2.5 are 256-position digital potentiometers, providing 8-bit resolution for each of their two independent channels.
What is the supply voltage range for the AD5243BRMZ100 and AD5243BRM2.5?
Both devices operate from a single 2.7 V to 5.5 V supply, making them suitable for low-voltage portable and battery-powered applications.
What is the wiper resistance for each part?
The wiper resistance is typically 60 Ω for the AD5243BRMZ100 and typically 60 Ω for the AD5243BRM2.5, as specified in the Analog Devices datasheet. The lower end-to-end resistance of the 2.5 kΩ version makes wiper resistance a larger percentage of the total resistance.
What digital interface do the AD5243BRMZ100 and AD5243BRM2.5 use?
Both devices use a 2-wire I²C-compatible serial interface, supporting standard and fast modes up to 400 kHz. They include two address pins for up to four devices on the same bus.
What are the operating temperature ranges for these digital potentiometers?
Both the AD5243BRMZ100 and AD5243BRM2.5 are specified for the industrial temperature range of −40°C to +125°C, as stated in the Analog Devices datasheet.