Part A
ADN2850BCPZ250
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7397 PCS
- Package
- LFCSP-16
- Series
- Acquisição de dados - Potenciômetros Digitais
Replacement verdict
Not a drop-in replacement
The ADN2850BCPZ250 and ADN2813ACPZ-RL7 are fundamentally different devices: a dual-channel digital potentiometer versus a clock and data recovery IC. They serve unrelated functions, use different signal interfaces, and cannot be substituted for one another in any design.
Different device function
Different signal interface
Different package and pinout
Different supply requirements
Parts at a glance
Part B
ADN2813ACPZ-RL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3418 PCS
- Package
- WFQFN-32
- Series
- Horário - Específico do Programa
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADN2850BCPZ250 | ADN2813ACPZ-RL7 | Why it matters |
|---|---|---|---|
| Function / Device Type | Nonvolatile digital potentiometer (dual-channel, 250 kΩ) | Continuous-rate clock and data recovery (CDR) IC | These are fundamentally different device classes, so they are not functionally substitutable in any design. |
| Package / Mounting | 32-lead LFCSP (surface mount) | 32-lead LFCSP (surface mount) | Package footprint and assembly compatibility affect PCB layout and rework, even though both use the same package style. |
| Supply Voltage | 2.7 V to 5.5 V (single supply) | 3.3 V nominal (3.0 V to 3.6 V) | Operating voltage range determines power-rail compatibility and whether the part can share an existing supply. |
| Primary Interface | SPI-compatible serial interface | I2C-compatible control interface | The host controller must support the matching serial protocol for configuration and control. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Industrial temperature range suitability is required for reliable operation in harsh environments. |
| Data Rate / Signal Handling | Not applicable (analog resistance setting device) | Continuous rate up to 12.5 Gbps (SONET/SDH, 10 GbE, Fibre Channel) | High-speed serial data handling is the core function of the CDR and is absent in the potentiometer. |
| Number of Channels | 2 (dual potentiometer) | 1 (single CDR channel) | Channel count affects how many independent signal paths can be handled per device. |
| End-to-End Resistance | 250 kΩ | Not applicable | Resistance value defines the potentiometer's adjustment range and is irrelevant to a CDR device. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADN2850BCPZ250 | ADN2813ACPZ-RL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| PLL | - | Yes |
| Main Purpose | - | SONET/SDH |
| Input | - | CML |
| Output | - | LVDS |
| Number of Circuits | - | 1 |
| Ratio - Input: Output | - | 1:2 |
| Differential - Input: Output | - | Yes/Yes |
| Frequency - Max | - | 1.25GHz |
| Voltage - Supply | - | 3V ~ 3.6V |
| Operating Temperature | - | -40°C ~ 85°C |
| Mounting Type | - | Surface Mount |
Frequently asked questions
What are the primary functions of the ADN2850BCPZ250 and ADN2813ACPZ-RL7?
The ADN2850BCPZ250 is a dual-channel, 250 kΩ, nonvolatile digital potentiometer with an SPI-compatible interface. The ADN2813ACPZ-RL7 is a continuous-rate clock and data recovery (CDR) IC with an integrated limiting amplifier, designed for fiber-optic receiver applications.
Can the ADN2850BCPZ250 and ADN2813ACPZ-RL7 be used interchangeably in a design?
No. The two devices serve entirely different functions: the ADN2850BCPZ250 is a digitally controlled variable resistor, while the ADN2813ACPZ-RL7 is a clock and data recovery signal-conditioning IC. They are not pin-compatible or functionally interchangeable.
What are the package and pin-count differences between the two parts?
The ADN2850BCPZ250 is supplied in a 16-lead LFCSP package. The ADN2813ACPZ-RL7 is supplied in a 32-lead LFCSP package. The differing pin counts and pin functions preclude any direct PCB footprint substitution.
What supply voltage ranges do the ADN2850BCPZ250 and ADN2813ACPZ-RL7 require?
The ADN2850BCPZ250 operates from a single 2.7 V to 5.5 V supply. The ADN2813ACPZ-RL7 operates from a 3.3 V supply (3.0 V to 3.6 V). Designs must account for these different supply requirements if both devices are used on the same board.
What are the key performance specifications of the ADN2850BCPZ250?
The ADN2850BCPZ250 provides a 250 kΩ end-to-end resistance with 1024-position resolution per channel, nonvolatile EEPROM memory for wiper position retention, and an SPI-compatible serial interface. It is specified for operation over the −40 °C to +85 °C industrial temperature range.
What data rates does the ADN2813ACPZ-RL7 support?
The ADN2813ACPZ-RL7 is a continuous-rate CDR that operates from 12.3 Mb/s to 2.7 Gb/s, covering SONET/SDH, Fibre Channel, and Gigabit Ethernet data rates without requiring a rate-select pin or external reference clock configuration.
Are both devices qualified for industrial temperature operation?
Yes. Both the ADN2850BCPZ250 and the ADN2813ACPZ-RL7 are specified for the −40 °C to +85 °C industrial temperature range, as stated in their respective manufacturer datasheets.
Which device should be selected for optical receiver signal conditioning versus analog bias or gain trimming?
For optical receiver signal conditioning, clock and data recovery, and limiting amplifier functions, the ADN2813ACPZ-RL7 is the appropriate choice. For analog bias adjustment, gain trimming, or programmable resistance applications, the ADN2850BCPZ250 digital potentiometer is the correct selection.