Part A
ADN2850BCPZ250
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7397 PCS
- Package
- LFCSP-16
- Series
- Data Acquisition - Digital Potentiometers
Replacement verdict
Not a drop-in replacement
The ADN2850BCPZ250 and ADN2806ACPZ are fundamentally different device classes and cannot serve as substitutes for one another. The ADN2850BCPZ250 is a dual-channel nonvolatile digital potentiometer, while the ADN2806ACPZ is a clock and data recovery IC. Their functions, interfaces, and electrical characteristics are entirely dissimilar, so no functional replacement is possible in either direction.
Different device function
Different interface type
Different signal path role
Different application domain
Parts at a glance
Part B
ADN2806ACPZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6005 PCS
- Package
- WFQFN-32
- Series
- Clock-Timing - Application Specific
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 | ADN2806ACPZ | Why it matters |
|---|---|---|---|
| Function / Device Type | Nonvolatile digital potentiometer (dual-channel, 250 kΩ) | Clock and data recovery (CDR) IC with limiting amplifier | These are fundamentally different device classes, so they are not functionally substitutable in any design. |
| Primary Application | Programmable resistance / gain and offset adjustment | Signal conditioning and retiming in optical/telecom receivers | The intended use cases do not overlap, confirming they serve unrelated circuit functions. |
| Number of Channels | 2 (dual potentiometer) | 1 (single data channel) | Channel count affects how many independent signal paths can be handled per package. |
| End-to-End Resistance | 250 kΩ | Not applicable (not a resistive device) | Resistance value is a defining parameter for a digital potentiometer but meaningless for a CDR IC. |
| Interface | SPI-compatible serial interface | No digital control interface (analog signal path) | A digital control bus is required to program a potentiometer, whereas the CDR operates autonomously on the signal. |
| Supply Voltage | 2.7 V to 5.5 V (single supply) | 3.3 V nominal (single supply) | Supply compatibility determines whether the part can drop into an existing power rail without redesign. |
| Package | LFCSP (lead-frame chip scale package) | LFCSP (lead-frame chip scale package) | Package footprint and thermal characteristics affect board layout and assembly. |
| Operating Temperature Range | −40 °C to +85 °C (industrial) | −40 °C to +85 °C (industrial) | Both meet industrial temperature requirements, so environmental range is not a differentiator here. |
| Data Rate / Bandwidth | Not applicable (DC resistive device) | Up to 10 Gbps (CDR data rate) | High-speed data handling is the core function of the CDR and irrelevant to a potentiometer. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADN2850BCPZ250 | ADN2806ACPZ |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,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 | - | 622MHz |
| Voltage - Supply | - | 3V ~ 3.6V |
| Operating Temperature | - | -40°C ~ 85°C |
| Mounting Type | - | Surface Mount |
Frequently asked questions
Are the ADN2850BCPZ250 and ADN2806ACPZ functionally interchangeable?
No. The ADN2850BCPZ250 is a dual-channel, 250 kΩ nonvolatile digital potentiometer, while the ADN2806ACPZ is a clock and data recovery (CDR) IC. They serve entirely different functions and are not interchangeable.
What are the primary functions of the ADN2850BCPZ250 and ADN2806ACPZ?
The ADN2850BCPZ250 provides digitally controlled resistance for applications such as gain and offset adjustment, with a 250 kΩ end-to-end resistance and nonvolatile memory. The ADN2806ACPZ performs clock and data recovery for high-speed serial data links.
Do the ADN2850BCPZ250 and ADN2806ACPZ use the same package type?
Both devices are offered in LFCSP packages, but the specific package sizes and pin counts differ. The ADN2850BCPZ250 is a 5 mm × 5 mm, 32-lead LFCSP, while the ADN2806ACPZ is a 5 mm × 5 mm, 32-lead LFCSP as well; however, pin functions and internal circuitry are not compatible, so PCB layouts cannot be shared.
Can the ADN2850BCPZ250 and ADN2806ACPZ operate from the same supply voltage?
The ADN2850BCPZ250 operates from a 2.7 V to 5.5 V single supply (or ±2.5 V dual supply). The ADN2806ACPZ operates from a 3.3 V supply. While both can operate at 3.3 V, the supply requirements and tolerances are defined separately in each datasheet and must be respected individually.
Are the ADN2850BCPZ250 and ADN2806ACPZ both nonvolatile devices?
Only the ADN2850BCPZ250 includes nonvolatile memory (EEPROM) to retain wiper settings through power cycles. The ADN2806ACPZ is a high-speed signal processing IC and does not contain nonvolatile memory for configuration storage.
What are the target applications for each device?
The ADN2850BCPZ250 is intended for precision analog signal conditioning, such as programmable gain amplifiers, offset trimming, and calibration circuits. The ADN2806ACPZ targets high-speed serial communication systems, including optical transceivers and backplane data recovery.
Do the ADN2850BCPZ250 and ADN2806ACPZ share the same operating temperature range?
Both devices are specified for the industrial temperature range of −40°C to +85°C, as stated in their respective datasheets. However, other electrical and timing specifications differ significantly and must be evaluated independently.