Part A
ADN2816ACPZ
ADI公司
- Lifecycle
- Active
- Stock
- 5594 件
- Package
- LFCSP-32
- Series
- 時鐘定時-特定應用
Replacement verdict
Compatible functional replacement candidate
The ADN2816ACPZ and ADN2805ACPZ-RL7 are both single-channel clock and data recovery ICs from Analog Devices in the same 32-lead LFCSP package, sharing a common footprint and supply architecture. However, they are specified for different SONET/SDH data rates and exhibit differences in jitter performance and output interface configuration, so the ADN2805ACPZ-RL7 can serve as a functional candidate only after the target line rate, jitter budget, and output interface requirements are validated against the application.
Package Type
High match
Data Rate
Validation required
Jitter Performance
Validation required
Output Interface
Validation required
Parts at a glance
Part B
ADN2805ACPZ-RL7
ADI公司
- Lifecycle
- Active
- Stock
- 2973 件
- Package
- WFQFN-32
- Series
- 時鐘定時-特定應用
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADN2816ACPZ | ADN2805ACPZ-RL7 | Why it matters |
|---|---|---|---|
| Data Rate Range | 10 Mbps to 675 Mbps | Up to 1.25 Gbps | Defines the range of serial data rates the clock and data recovery circuit can lock to; a mismatch limits functional substitutability in a given link. |
| Supply Voltage (VCC) | 3.3 V | 3.3 V | Both operate from the same nominal 3.3 V rail, so power-supply compatibility is maintained between the two parts. |
| Package / Pin Count | 32-lead LFCSP (5 mm x 5 mm) | 32-lead LFCSP (5 mm x 5 mm) | Identical package and footprint allow a drop-in board replacement without layout changes. |
| Output Type | CML-compatible differential outputs | CML-compatible differential outputs | Matching output signaling ensures the downstream receiver interface remains compatible. |
| Jitter (RMS) | Typically ~5 ps RMS (dependent on rate) | Typically ~5 ps RMS (dependent on rate) | Output jitter affects bit-error-rate margin; comparable jitter supports equivalent link performance. |
| Input Sensitivity | Differential input sensitivity specified in datasheet | Differential input sensitivity specified in datasheet | Determines the minimum signal amplitude the CDR can reliably recover; similar sensitivity supports interchangeability. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature range means both parts suit the same environmental conditions. |
| Lock Detect / Loss of Signal | Provides LOS and lock detect functions | Provides LOS and lock detect functions | Status/monitoring signals are needed by system controllers; matching these functions preserves system-level behavior. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADN2816ACPZ | ADN2805ACPZ-RL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| PLL | Yes | Yes |
| Main Purpose | SONET/SDH | SONET/SDH |
| Input | CML | CML |
| Output | LVDS | LVDS |
| Number of Circuits | 1 | 1 |
| Ratio - Input: Output | 1:2 | 1:2 |
| Differential - Input: Output | Yes/Yes | Yes/Yes |
| Frequency - Max | 675MHz | 1.25GHz |
| Voltage - Supply | 3V ~ 3.6V | 3V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the ADN2816ACPZ and ADN2805ACPZ-RL7?
The ADN2816ACPZ and ADN2805ACPZ-RL7 are both Analog Devices clock and data recovery (CDR) ICs for optical receiver applications. The ADN2816ACPZ is a continuous-rate CDR with a specified operating range of 10 Mbps to 675 Mbps, while the ADN2805ACPZ-RL7 is a fixed-rate CDR designed for 1.25 Gbps (OC-24/STM-8) applications. Both are supplied in a 32-lead LFCSP package.
What is the key functional difference between the ADN2816ACPZ and ADN2805ACPZ-RL7?
The ADN2816ACPZ is a continuous-rate CDR that locks over a wide input data rate range (10 Mbps to 675 Mbps) without requiring an external reference clock or rate-select configuration. The ADN2805ACPZ-RL7 is a fixed-rate CDR optimized for 1.25 Gbps operation. The choice depends on whether the application requires multi-rate flexibility or a dedicated single-rate link.
Are the ADN2816ACPZ and ADN2805ACPZ-RL7 pin-compatible?
Both devices are offered in the same 32-lead LFCSP package, but pin compatibility cannot be assumed from package alone. The ADN2816ACPZ and ADN2805ACPZ-RL7 have different functions and configurations, so the pin assignments and external component requirements must be verified against the respective Analog Devices datasheets before any board-level substitution is considered.
What data rates does each device support?
The ADN2816ACPZ supports a continuous data rate range from 10 Mbps to 675 Mbps. The ADN2805ACPZ-RL7 is a fixed-rate device targeting 1.25 Gbps. Designs requiring operation across multiple lower-rate protocols should use the ADN2816ACPZ, while 1.25 Gbps links are served by the ADN2805ACPZ-RL7.
Do these CDRs require an external reference clock?
The ADN2816ACPZ is designed to operate without an external reference clock, locking directly to the incoming data across its continuous rate range. The ADN2805ACPZ-RL7 is a fixed-rate CDR intended for 1.25 Gbps operation. Reference clock and configuration requirements for each device should be confirmed in the respective Analog Devices datasheets.
What is the significance of the -RL7 suffix on ADN2805ACPZ-RL7?
The -RL7 suffix indicates the packaging and shipment format: the device is supplied in tape-and-reel form, with 7-inch reels, as defined by Analog Devices ordering conventions. The ADN2816ACPZ is specified with the ACPZ suffix denoting the 32-lead LFCSP package in tray form. Buyers should confirm exact reel quantity and packaging from the Analog Devices ordering guide.
Can the ADN2816ACPZ and ADN2805ACPZ-RL7 be used interchangeably in a design?
No. Although both are Analog Devices CDR ICs in the same 32-lead LFCSP package, they differ in rate capability and configuration: the ADN2816ACPZ is continuous-rate (10 Mbps to 675 Mbps) and the ADN2805ACPZ-RL7 is fixed-rate at 1.25 Gbps. Interchangeability requires full validation of data rate, loop filter, reference clock, and pin function differences against both datasheets.
Which device is better suited for multi-protocol optical modules?
The ADN2816ACPZ is better suited for multi-protocol or multi-rate optical modules because its continuous-rate architecture supports data rates from 10 Mbps to 675 Mbps without rate-specific configuration. The ADN2805ACPZ-RL7, being fixed at 1.25 Gbps, is appropriate only for designs dedicated to that rate.