Part A
AD5243BRMZ100
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5248 Stückzahl
- Package
- MSOP-10
- Series
- Datenerfassung
Replacement verdict
Compatible functional replacement candidate
The AD5243BRMZ100 and AD5248BRMZ100 are both 100 kΩ dual-channel digital potentiometers from Analog Devices in the same 10-lead MSOP package, sharing identical resistance tolerance, supply voltage range, and I²C interface characteristics. The AD5248BRMZ100 adds nonvolatile memory storage of the wiper setting, which the AD5243BRMZ100 does not provide. This difference in wiper memory behavior is the primary consideration when evaluating functional substitutability between the two devices.
Resistance Value
High match
Package Type
High match
Interface Type
High match
Wiper Memory Type
Validation required
Parts at a glance
Part B
AD5248BRMZ100
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6885 Stückzahl
- Package
- MSOP-10
- Series
- Datenerfassung
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 | AD5248BRMZ100 | Why it matters |
|---|---|---|---|
| Number of Positions | 256 | 256 | Determines the resolution of the digital potentiometer; identical resolution means equivalent wiper step granularity. |
| End-to-End Resistance | 100 kΩ | 100 kΩ | Sets the nominal resistance range of the potentiometer; matching values allow direct substitution in the same circuit. |
| Number of Potentiometers | 1 | 2 | Indicates how many independent variable resistors are integrated; the AD5248 provides two channels, enabling dual-channel designs. |
| Interface Type | I²C | I²C | Defines the digital communication protocol used to control the device; both use I²C, simplifying firmware compatibility. |
| Wiper Resistance | 60 Ω (typical) | 60 Ω (typical) | Affects the minimum achievable resistance and signal attenuation; similar values ensure comparable performance. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Determines compatibility with system power rails; identical ranges allow use in the same voltage domain. |
| Package Type | 10-Lead MSOP | 10-Lead MSOP | Defines the physical footprint and PCB layout; matching packages enable drop-in replacement without board redesign. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Specifies the environmental limits for reliable operation; identical ranges suit the same application environments. |
| Nonvolatile Memory | No | No | Indicates whether the wiper setting is retained after power-off; both lack nonvolatile memory, requiring reinitialization on startup. |
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 | AD5248BRMZ100 |
|---|---|---|
| Part Status | Active | Active |
| 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 AD5248BRMZ100 digital potentiometers?
The AD5243BRMZ100 is a dual-channel, 100 kΩ, 256-position digital potentiometer with an I²C-compatible interface, while the AD5248BRMZ100 is a dual-channel, 100 kΩ, 256-position 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.
Are the AD5243BRMZ100 and AD5248BRMZ100 pin-compatible?
No. Although both devices are housed in a 10-lead MSOP package, their pinouts differ because the AD5243BRMZ100 uses an I²C interface and the AD5248BRMZ100 uses an SPI interface. The digital interface pins (SDA/SCL versus SDI/SDO/CLK/CS) occupy different positions, so they are not drop-in replacements for each other.
Can the AD5243BRMZ100 and AD5248BRMZ100 be used interchangeably in an existing design?
No. Because the digital interface protocols and pin assignments differ, substituting one for the other requires PCB layout changes and firmware modifications. The analog performance specifications (resistance, resolution, temperature coefficient) are similar, but the digital control interface is not compatible.
What is the resolution and number of positions for both the AD5243BRMZ100 and AD5248BRMZ100?
Both devices provide 256 positions (8-bit resolution) per channel. Each has two independent digitally controlled potentiometers, yielding a total of 512 wiper positions across both channels.
What supply voltage range do the AD5243BRMZ100 and AD5248BRMZ100 support?
Both the AD5243BRMZ100 and AD5248BRMZ100 operate from a single supply voltage of 2.7 V to 5.5 V. They are specified for operation over the extended industrial temperature range of −40°C to +125°C.
What is the end-to-end resistance and tolerance of the AD5243BRMZ100 and AD5248BRMZ100?
Both the AD5243BRMZ100 and AD5248BRMZ100 have a nominal end-to-end resistance of 100 kΩ. The resistance tolerance is typically ±20% for the 100 kΩ version, as specified in the manufacturer datasheets.
Which interface protocol does each device use for digital control?
The AD5243BRMZ100 uses a 2-wire I²C-compatible serial interface, supporting standard and fast modes. The AD5248BRMZ100 uses a 3-wire SPI-compatible serial interface with separate SDI, SDO, and CLK lines plus a chip select (CS) input.
Are the AD5243BRMZ100 and AD5248BRMZ100 available in the same package type?
Yes. Both devices are offered in a 10-lead MSOP (RM) package. However, the pinouts are different due to the different digital interface protocols, so the package alone does not guarantee interchangeability.