Part A
AD5243BRMZ100
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5248 PCS
- Package
- MSOP-10
- Series
- Acquisição de dados - Potenciômetros Digitais
Replacement verdict
Compatible functional replacement candidate
The AD5243BRMZ100 and AD5243BRM100-RL7 are functionally equivalent digital potentiometers from the same AD5243 family, sharing identical resistance tolerance, wiper configuration, and I²C interface characteristics. The primary distinction lies in packaging and ordering format, making the AD5243BRMZ100 a viable substitute for the AD5243BRM100-RL7 in most designs, provided the designer accounts for the RoHS-compliant MSL rating and reel packaging differences.
Resistance Value
High match
Package Type
High match
Interface Type
High match
Packaging Format
Validation required
Parts at a glance
Part B
AD5243BRM100-RL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2064 PCS
- Package
- MSOP-10
- Series
- Acquisição de dados - Potenciômetros Digitais
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 | AD5243BRM100-RL7 | Why it matters |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Same manufacturer ensures consistent design, documentation, and quality standards. |
| Resistance Value | 100 kΩ | 100 kΩ | Determines the end-to-end resistance range of the digital potentiometer, directly affecting circuit gain or attenuation. |
| Number of Taps | 256 | 256 | Defines the resolution of resistance adjustment; more taps provide finer wiper positioning. |
| Number of Potentiometers | 2 | 2 | Indicates how many independent variable resistors are integrated in a single package. |
| Interface Type | I²C | I²C | Determines the communication protocol used to control the wiper position from a host controller. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines the compatible system power rails for proper operation. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Ensures the device functions reliably across the intended environmental conditions. |
| Package / Case | 10-TFSOP, 10-MSOP | 10-TFSOP, 10-MSOP | Determines PCB footprint and assembly compatibility for drop-in substitution. |
| Mounting Type | Surface Mount | Surface Mount | Must match the board assembly process for physical compatibility. |
| Packaging / Ordering Format | Tube | Tape & Reel | Affects handling, inventory, and suitability for automated pick-and-place production lines. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5243BRMZ100 | AD5243BRM100-RL7 |
|---|---|---|
| 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 | 100k |
| 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 are the key differences between the AD5243BRMZ100 and the AD5243BRM100-RL7?
The AD5243BRMZ100 is a RoHS-compliant, lead-free version of the AD5243 100 kΩ dual-channel digital potentiometer in a 10-lead MSOP package. The AD5243BRM100-RL7 is the older, non-RoHS (contains lead) version of the same device, supplied in tape-and-reel packaging. Both share identical electrical specifications, including 100 kΩ end-to-end resistance, 256-position resolution, and I²C-compatible interface.
Are the AD5243BRMZ100 and AD5243BRM100-RL7 electrically interchangeable?
Yes. Both parts have the same functional block diagram, pinout, and electrical parameters as specified in the Analog Devices AD5243 datasheet. The primary difference is the package plating and compliance status: the "Z" suffix in AD5243BRMZ100 indicates a lead-free, RoHS-compliant molding compound and lead finish, while the AD5243BRM100-RL7 uses a tin-lead (SnPb) finish. They can be used interchangeably in most designs, provided the assembly process and regulatory requirements allow the respective finish.
What is the end-to-end resistance and resolution of these digital potentiometers?
Both the AD5243BRMZ100 and AD5243BRM100-RL7 have a nominal end-to-end resistance of 100 kΩ and provide 256 positions (8-bit resolution) for each of the two independent channels. These parameters are specified in the Analog Devices AD5243 datasheet and are identical for both orderable part numbers.
Do both parts support the same digital interface and operating voltage range?
Yes. Both devices use a 2-wire I²C-compatible serial interface and operate from a single 2.7 V to 5.5 V supply. The digital inputs are compatible with 3 V and 5 V logic families. These specifications are common to all AD5243 variants and are documented in the manufacturer datasheet.
Which part should be selected for a new RoHS-compliant design?
For new designs requiring RoHS compliance, the AD5243BRMZ100 is the appropriate choice because it is fully lead-free and RoHS-compliant. The AD5243BRM100-RL7 contains lead and is not RoHS-compliant, so it should be avoided in products intended for markets with RoHS or similar environmental regulations. Always verify current compliance status with the manufacturer or authorized distributor before finalizing a bill of materials.
Are the AD5243BRMZ100 and AD5243BRM100-RL7 available in the same package type?
Yes. Both parts are offered in a 10-lead MSOP (Mini Small Outline Package) with identical body dimensions and pin assignments. The package outline and PCB land pattern are the same, so no layout changes are required when switching between them. The "-RL7" suffix on the AD5243BRM100-RL7 indicates tape-and-reel packaging with a 7-inch reel, while the AD5243BRMZ100 is typically supplied in standard tube or tape-and-reel depending on the order quantity.
Can the AD5243BRM100-RL7 be used as a drop-in replacement for the AD5243BRMZ100 in an existing assembly?
Electrically and mechanically, yes, provided the assembly process supports tin-lead (SnPb) soldering. However, substituting a non-RoHS part into a RoHS-compliant assembly may violate regulatory requirements and can contaminate lead-free solder baths. Conversely, replacing the AD5243BRM100-RL7 with the AD5243BRMZ100 in a SnPb process may require revalidation of solder joint reliability. Always confirm process compatibility and compliance obligations before substituting.
What are the operating temperature ranges for these devices?
Both the AD5243BRMZ100 and AD5243BRM100-RL7 are specified for the industrial temperature range of −40°C to +85°C, as stated in the Analog Devices AD5243 datasheet. This range applies to both the electrical performance and the package reliability specifications.