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 AD5248BRM100 are both dual-channel 100 kΩ digital potentiometers from Analog Devices in the same 10-lead MSOP package, sharing identical resistance tolerance, nominal temperature coefficient, and I²C-compatible interface characteristics. However, they differ in nonvolatile memory architecture and wiper setting retention behavior, which may affect system initialization and power-cycle response. Designers should validate memory configuration and startup behavior before substituting one for the other in a given application.
Resistance Value
High match
Channel Count
High match
Package Type
High match
Memory Type
Validation required
Parts at a glance
Part B
AD5248BRM100
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8193 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 | AD5248BRM100 | Why it matters |
|---|---|---|---|
| Number of Channels | 2 | 2 | Channel count determines how many independent resistance paths can be controlled in a circuit. |
| End-to-End Resistance | 100 kΩ | 100 kΩ | The nominal resistance sets the range of adjustable resistance available for the application. |
| Resolution | 256 positions (8-bit) | 256 positions (8-bit) | Resolution determines the number of discrete wiper settings and the step size between them. |
| Interface Type | I²C | SPI | The digital interface must match the host controller's available bus, affecting system compatibility. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Supply range must be compatible with the system power rail to ensure proper operation. |
| Package Type | 10-Lead MSOP | 10-Lead MSOP | Package footprint and pinout affect PCB layout and physical interchangeability. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Temperature range determines suitability for industrial or automotive environments. |
| Wiper Resistance | 60 Ω typical | 60 Ω typical | Wiper resistance adds to the set resistance and affects accuracy in low-resistance settings. |
| Nonvolatile Memory | No | No | Nonvolatile memory retains the wiper setting after power loss, affecting startup behavior. |
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 | AD5248BRM100 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Taper | Linear | Linear |
| Configuration | Potentiometer | Rheostat |
| Number of Circuits | 2 | 2 |
| Number of Taps | 256 | 256 |
| Resistance(Ohms) | 100k | 100k |
| Interface | I²C | I²C |
| Memory Type | Volatile | Volatile |
| Voltage - Supply | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Features | - | Selectable Address |
| 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 are the key differences between the AD5243BRMZ100 and AD5248BRM100?
The AD5243BRMZ100 is a dual-channel, 100 kΩ digital potentiometer with an I²C-compatible interface, while the AD5248BRM100 is a dual-channel, 100 kΩ digital potentiometer with an SPI-compatible interface. Both are offered in a 10-lead MSOP package and operate from a 2.7 V to 5.5 V single supply, but they differ in digital interface protocol and related timing and pin functions.
Are the AD5243BRMZ100 and AD5248BRM100 pin-compatible?
No. Although both devices are housed in a 10-lead MSOP package, the AD5243BRMZ100 uses an I²C interface and the AD5248BRM100 uses an SPI interface, so the digital control pins and their functions differ. A direct drop-in replacement is not possible without verifying the pinout and control signals against the respective datasheets.
Can the AD5243BRMZ100 and AD5248BRM100 be used as direct substitutes in an existing design?
Not directly. Because the interface protocols differ (I²C versus SPI), the host controller firmware, PCB routing, and pull-up or pull-down requirements must be redesigned and validated. Substitution is only possible after confirming all electrical, timing, and pinout differences against the manufacturer datasheets.
Do both devices have the same end-to-end resistance and resolution?
Yes. Both the AD5243BRMZ100 and AD5248BRM100 are specified with a 100 kΩ end-to-end resistance and 8-bit resolution (256 positions), providing similar wiper resistance and ratiometric performance when used within their specified operating conditions.
What supply voltage range do the AD5243BRMZ100 and AD5248BRM100 support?
Both devices operate from a single supply of 2.7 V to 5.5 V, making them suitable for low-voltage digital potentiometer applications. The digital interface logic levels are referenced to the supply voltage, so the host controller must be compatible with the selected VDD.
Which device is better for applications requiring multiple digital potentiometers on the same bus?
The AD5243BRMZ100 (I²C) supports addressing multiple devices on a two-wire bus using device address pins, while the AD5248BRM100 (SPI) uses a chip-select line per device. For systems with many devices and limited pins, I²C may reduce pin count; for higher-speed or full-duplex communication, SPI may be preferred. The choice depends on the system bus architecture.
Are the AD5243BRMZ100 and AD5248BRM100 available in the same package and temperature range?
Both are offered in a 10-lead MSOP package and are specified for the industrial temperature range of −40°C to +85°C, according to their respective datasheets. Package and temperature grade are therefore common to both parts, but interface differences remain.