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 ADN2807ACPZ serve fundamentally different functions and cannot be treated as interchangeable. The ADN2850BCPZ250 is a dual-channel digital potentiometer, while the ADN2807ACPZ is a clock and data recovery IC, so their electrical roles, signal interfaces, and application domains do not overlap. Substitution is not feasible without a complete redesign of the surrounding circuit.
Different device function
Different signal interface
Different package and pinout
Different application domain
Parts at a glance
Part B
ADN2807ACPZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4651 PCS
- Package
- WFQFN-48
- 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 | ADN2807ACPZ | 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 clock recovery in optical/backplane receivers | The intended use cases do not overlap, confirming they serve unrelated circuit roles. |
| Number of Channels | 2 (dual potentiometer) | 1 (single data channel) | Channel count determines how many independent signal paths each device can handle. |
| End-to-End Resistance | 250 kΩ | Not applicable (not a resistive device) | Resistance value is a defining parameter for a digital potentiometer and has no meaning for a CDR IC. |
| Data Rate / Bandwidth | Not applicable (DC resistive device) | Up to 2.7 Gbps (OC-48 / SONET-compatible) | Data rate defines the maximum serial link speed the CDR can support; a potentiometer has no such spec. |
| Supply Voltage | 2.7 V to 5.5 V (single supply) | 3.3 V nominal (3.0 V to 3.6 V) | Supply range must match the system rail; mismatches can prevent operation or require level shifting. |
| Communication / Control Interface | SPI (serial interface for wiper setting) | No digital control interface (analog signal path only) | A programmable interface is essential for configuring a digital potentiometer, whereas the CDR is configured by hardware pins. |
| Package | 24-lead LFCSP (CP-24) | 32-lead LFCSP (CP-32) | Package footprint and pin count affect PCB layout and cannot be interchanged without redesign. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Both meet industrial temperature requirements, so thermal environment is not a differentiator here. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADN2850BCPZ250 | ADN2807ACPZ |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Analog Devices Inc. |
| Part Status | Active | Active |
| PLL | - | Yes |
| Main Purpose | - | SONET/SDH, STM |
| Input | - | CML |
| Output | - | CML |
| 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 ADN2807ACPZ functionally interchangeable?
No. The ADN2850BCPZ250 is a dual-channel, 250 kΩ nonvolatile digital potentiometer, while the ADN2807ACPZ is a clock-and-data recovery (CDR) IC for optical/backplane receivers. They serve entirely different functions and are not interchangeable.
What are the primary functions of the ADN2850BCPZ250 and ADN2807ACPZ?
The ADN2850BCPZ250 provides digitally controlled resistance (dual 250 kΩ potentiometers) with nonvolatile memory, typically used for calibration and gain/offset adjustment. The ADN2807ACPZ performs clock and data recovery on serial data streams, typically at OC-3/STM-1 or similar rates, in communication systems.
Do the ADN2850BCPZ250 and ADN2807ACPZ use the same package and pinout?
No. The ADN2850BCPZ250 is offered in a 16-lead LFCSP package, while the ADN2807ACPZ is offered in a 32-lead LFCSP package. Pin counts, pin functions, and PCB land patterns differ, so they are not footprint-compatible.
Can the ADN2850BCPZ250 and ADN2807ACPZ share the same power supply rail in a design?
They have different supply requirements and should not be assumed to share a rail without verification. The ADN2850BCPZ250 operates from a single supply in the 2.7 V to 5.5 V range, whereas the ADN2807ACPZ is a high-speed communications IC with its own specified supply and decoupling requirements per its datasheet.
Which device is suitable for optical receiver clock recovery, ADN2850BCPZ250 or ADN2807ACPZ?
The ADN2807ACPZ is the appropriate choice for clock-and-data recovery in optical/backplane receiver applications. The ADN2850BCPZ250 is a digital potentiometer and does not perform clock or data recovery.
Which device is suitable for nonvolatile digital resistance trimming, ADN2850BCPZ250 or ADN2807ACPZ?
The ADN2850BCPZ250 is the appropriate choice for nonvolatile digital resistance trimming, offering dual 250 kΩ digitally controlled potentiometers with nonvolatile memory. The ADN2807ACPZ does not provide variable resistance functions.
Do the ADN2850BCPZ250 and ADN2807ACPZ support the same digital interface?
No. The ADN2850BCPZ250 uses an SPI-compatible serial interface for programming its resistance settings. The ADN2807ACPZ does not expose an SPI potentiometer interface; its control and status signals are specific to its CDR function as defined in its datasheet.
Are the ADN2850BCPZ250 and ADN2807ACPZ rated for the same operating temperature range?
Both are specified for the industrial temperature range of −40 °C to +85 °C per their respective datasheets. However, this common rating does not imply functional or electrical compatibility between the two devices.