Part A
ADN2816ACPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5594 PCS
- Package
- LFCSP-32
- Series
- Horário - Específico do Programa
Replacement verdict
Compatible functional replacement candidate
The ADN2816ACPZ and ADN2805ACPZ-500RL7 are both single-channel clock and data recovery ICs from the same Analog Devices ADN28xx family, sharing a 5 mm × 5 mm 32-lead LFCSP footprint and a 3.3 V supply rail. The ADN2816ACPZ supports a wider data rate range and a broader operating temperature range, making it a viable functional substitute for the ADN2805ACPZ-500RL7 in most designs, provided the host system can accommodate the extended rate capability and the specific jitter and output requirements are validated against the target application.
Data Rate Range
High match
Package and Pinout
High match
Supply Voltage
High match
Operating Temperature Range
Validation required
Parts at a glance
Part B
ADN2805ACPZ-500RL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9105 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 | ADN2816ACPZ | ADN2805ACPZ-500RL7 | Why it matters |
|---|---|---|---|
| Data Rate Range | 10 Mbps to 675 Mbps | Up to 1.25 Gbps | The supported data rate determines whether the device can handle the target line rate; the ADN2805 reaches higher speeds than the ADN2816. |
| Output Type | CML | CML | Output logic level must match the downstream receiver interface; both use CML, easing direct substitution at the electrical interface. |
| Supply Voltage | 3.3 V | 3.3 V | Supply voltage compatibility ensures the part can drop into the same power rail without redesign. |
| Package / Pin Count | 32-Lead LFCSP | 32-Lead LFCSP | Matching package and pin count allows a drop-in footprint replacement on an existing PCB. |
| Jitter (RMS) | ~5 ps RMS typical | ~5 ps RMS typical | Low output jitter is critical for maintaining signal integrity and meeting link jitter budgets. |
| Input Sensitivity | ~5 mV p-p typical | ~5 mV p-p typical | Input sensitivity defines the minimum detectable signal, affecting link reach and robustness. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Industrial temperature range ensures reliable operation across harsh environments. |
| Function | Clock and data recovery (CDR) with limiting amplifier | Clock and data recovery (CDR) with limiting amplifier | Both perform the same core CDR function, making them candidates for functional substitution where data rate permits. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADN2816ACPZ | ADN2805ACPZ-500RL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| 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 primary functional differences between the ADN2816ACPZ and ADN2805ACPZ-500RL7?
The ADN2816ACPZ is a continuous-rate clock and data recovery (CDR) IC with an integrated limiting amplifier, supporting data rates from 10 Mbps to 675 Mbps. The ADN2805ACPZ-500RL7 is a fixed-rate CDR IC optimized for 1.25 Gbps (specifically 1.25 Gbps) applications, typically used in Gigabit Ethernet and Fibre Channel systems. The ADN2816 offers rate flexibility, while the ADN2805 is dedicated to a single high-speed rate.
Are the ADN2816ACPZ and ADN2805ACPZ-500RL7 pin-compatible and package-compatible?
Both devices are offered in a 32-lead LFCSP (5 mm × 5 mm) package. However, pin functions and external component requirements differ due to their different architectures (continuous-rate vs. fixed-rate). Designers must consult the respective datasheets for pinout and layout details; they are not drop-in replacements without schematic and layout verification.
What data rate ranges do these two CDR ICs support?
The ADN2816ACPZ supports a continuous data rate range from 10 Mbps to 675 Mbps. The ADN2805ACPZ-500RL7 is a fixed-rate device designed for 1.25 Gbps operation. The ADN2805 does not support lower rates without external configuration, whereas the ADN2816 automatically locks over its entire specified range.
Which device is better suited for multi-rate optical receiver designs?
The ADN2816ACPZ is better suited for multi-rate or variable-rate optical receiver designs because its continuous-rate CDR can lock to any data rate between 10 Mbps and 675 Mbps without external rate-select components. The ADN2805ACPZ-500RL7 is intended for fixed 1.25 Gbps links and is not designed for multi-rate operation.
Do both parts include a limiting amplifier and what are the input sensitivity specifications?
Yes, both the ADN2816ACPZ and ADN2805ACPZ-500RL7 integrate a limiting amplifier ahead of the CDR. The ADN2816 specifies input sensitivity typically around 5 mV p-p (depending on rate), while the ADN2805 specifies sensitivity for 1.25 Gbps operation. Exact sensitivity values and test conditions must be taken from the respective manufacturer datasheets, as they vary with data rate and pattern.
What are the typical power supply and power consumption differences?
Both devices operate from a single 3.3 V supply. The ADN2816ACPZ typically consumes approximately 220 mW (typical) depending on configuration. The ADN2805ACPZ-500RL7 typically consumes approximately 300 mW at 1.25 Gbps. Designers should verify exact current and power figures from the latest Analog Devices datasheets, as these values depend on output loading and mode settings.
Can the ADN2805ACPZ-500RL7 be used at data rates other than 1.25 Gbps?
No. The ADN2805ACPZ-500RL7 is a fixed-rate CDR optimized for 1.25 Gbps and is not specified for operation at other data rates. For variable or lower-rate applications, the ADN2816ACPZ (10 Mbps to 675 Mbps) or other continuous-rate CDR devices should be selected.
What are the typical target applications for each device?
The ADN2816ACPZ is typically used in multi-rate optical transceivers, GPON/EPON receivers, and general-purpose serial data links requiring rate flexibility up to 675 Mbps. The ADN2805ACPZ-500RL7 is typically used in 1.25 Gbps Gigabit Ethernet (1000BASE-X), Fibre Channel, and other fixed 1.25 Gbps serial links.