Part A
AD5243BRMZ100
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 AD5248BRM10 are both dual-channel digital potentiometers from Analog Devices with comparable I²C interfaces and similar 10 kΩ nominal resistance, making the AD5248BRM10 a viable functional replacement candidate for the AD5243BRMZ100 in many non-critical designs. However, designers must validate key differences in package footprint, volatile memory behavior, and operating voltage range before committing to a drop-in substitution.
Package Type
Validation required
Resistance Value
High match
Memory Type
Validation required
Supply Voltage Range
Validation required
Parts at a glance
Part B
AD5248BRM10
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2037 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 | AD5248BRM10 | Why it matters |
|---|---|---|---|
| Number of Channels | 2 | 2 | Both are dual-channel digital potentiometers, so channel count matches for direct functional substitution. |
| End-to-End Resistance | 100 kΩ | 10 kΩ | Resistance value directly affects the voltage divider ratio and current in the target circuit, so a mismatch changes circuit behavior. |
| Interface Type | I²C (2-wire) | Up/Down (3-wire) | The control interface must match the host controller; I²C and up/down interfaces are not pin- or protocol-compatible. |
| Number of Positions (Taps) | 256 | 256 | Tap count determines the resolution of resistance adjustment; identical resolution supports equivalent wiper positioning granularity. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Compatible supply ranges allow both devices to operate from the same system rail without level shifting. |
| Package / Mounting | 10-Lead MSOP, Surface Mount | 10-Lead MSOP, Surface Mount | Identical package and footprint enable drop-in board replacement without layout changes. |
| Nonvolatile Memory | No (volatile wiper setting) | No (volatile wiper setting) | Both lose wiper position on power-down, so neither retains settings without external initialization. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ranges ensure both parts are suitable for the same industrial and commercial environments. |
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 | AD5248BRM10 |
|---|---|---|
| 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 | 10k |
| 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 AD5248BRM10?
The AD5243BRMZ100 is a dual-channel, 100 kΩ digital potentiometer with an I²C-compatible interface, while the AD5248BRM10 is a dual-channel, 10 kΩ digital potentiometer with an SPI-compatible interface. The primary differences are end-to-end resistance (100 kΩ vs 10 kΩ) and digital interface type (I²C vs SPI).
Are the AD5243BRMZ100 and AD5248BRM10 pin-compatible?
No. Although both are offered in 10-lead MSOP packages, their pin functions differ due to different digital interfaces (I²C vs SPI) and internal architectures. They are not direct pin-to-pin replacements.
What is the resolution of each digital potentiometer?
Both the AD5243BRMZ100 and AD5248BRM10 provide 256-position resolution (8-bit) for each of their two channels.
What supply voltage ranges do these devices support?
The AD5243BRMZ100 operates from a single 2.7 V to 5.5 V supply. The AD5248BRM10 operates from a single 2.5 V to 5.5 V supply. Both are suitable for low-voltage digital systems.
Can the AD5243BRMZ100 and AD5248BRM10 be used in daisy-chain configurations?
No. The AD5243BRMZ100 uses I²C addressing, which does not support daisy-chaining. The AD5248BRM10 uses SPI, but its SPI interface does not include a serial data output (SDO) pin, so daisy-chaining is not supported.
What are the typical applications for each device?
Both are used for adjustable gain/offset trimming, programmable voltage references, and LCD panel calibration. The AD5243BRMZ100 (100 kΩ, I²C) suits systems with limited microcontroller pins, while the AD5248BRM10 (10 kΩ, SPI) suits higher-speed serial communication and lower resistance load requirements.
Do these digital potentiometers have non-volatile memory?
No. Neither the AD5243BRMZ100 nor the AD5248BRM10 includes non-volatile memory. The wiper position is volatile and resets to midscale on power-up unless reprogrammed by the host controller.
What is the operating temperature range for both devices?
Both the AD5243BRMZ100 and AD5248BRM10 are specified for the industrial temperature range of −40°C to +85°C.