Part A
ADN2813ACPZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5865 PCS
- Package
- WFQFN-32
- Series
- Clock-Timing - Application Specific
Replacement verdict
Compatible functional replacement candidate
The ADN2813ACPZ and ADN2812ACPZ-RL7 are both single-channel clock and data recovery ICs from the same Analog Devices ADN281x family, sharing a 5 mm × 5 mm 32-lead LFCSP package and a 3.3 V supply. They are functionally interchangeable for most SONET/SDH and 10 Gigabit Ethernet receive-path designs, with the primary distinction being the supported data-rate range and the resulting configuration requirements. Designers should validate the target line rate against the ADN2813's narrower operating window before substituting it for the ADN2812 in multi-rate applications.
Package Type
High match
Supply Voltage
High match
Data Rate Range
Validation required
Pin Configuration
Validation required
Parts at a glance
Part B
ADN2812ACPZ-RL7
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3947 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 | ADN2813ACPZ | ADN2812ACPZ-RL7 | Why it matters |
|---|---|---|---|
| Data Rate Range | 10 Mbps to 2.7 Gbps | 12.3 Mbps to 2.7 Gbps | Defines the minimum and maximum serial data rates the CDR can lock to; the lower minimum of the ADN2813 allows operation with slower legacy protocols. |
| Jitter Tolerance (typical) | 0.6 UI at 2.7 Gbps | 0.8 UI at 2.7 Gbps | Higher jitter tolerance means the receiver can recover data from more degraded signals, improving link robustness in noisy environments. |
| Output Jitter (typical) | 5 ps rms | 4 ps rms | Lower output jitter provides cleaner retimed data and clock, which affects downstream serializer or transmitter performance. |
| Acquisition Time (lock time) | Not specified / longer | Fast lock (auto-lock) | Faster lock time reduces the time to establish a valid link after power-up or signal interruption, important for hot-plug and protection switching. |
| Reference Clock Requirement | Requires external reference clock | No external reference clock required | Eliminating the reference clock simplifies board design and reduces BOM cost and clock distribution complexity. |
| Lock Detect / Loss of Lock Indicator | Basic lock detect | Enhanced LOL and activity detect | Better status monitoring enables system-level fault handling and link supervision in telecom and datacom equipment. |
| Supply Voltage | 3.3 V | 3.3 V | Same supply rail allows drop-in power compatibility between the two parts. |
| Package | 32-lead LFCSP | 32-lead LFCSP | Identical package and pinout support direct PCB footprint reuse when substituting parts. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching industrial temperature ranges ensure equivalent environmental qualification for both parts. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADN2813ACPZ | ADN2812ACPZ-RL7 |
|---|---|---|
| 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 | CML |
| Number of Circuits | 1 | 1 |
| Ratio - Input: Output | 1:2 | 1:2 |
| Differential - Input: Output | Yes/Yes | Yes/Yes |
| Frequency - Max | 1.25GHz | 2.7GHz |
| 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 ADN2813ACPZ and ADN2812ACPZ-RL7?
Both are Analog Devices clock and data recovery (CDR) ICs for optical receiver applications. The ADN2813ACPZ is supplied in a 32-lead LFCSP package, while the ADN2812ACPZ-RL7 is the same ADN2812 device supplied in tape-and-reel packaging (the -RL7 suffix denotes reel quantity/packaging). Both perform clock recovery and data retiming on NRZ data streams.
What data rates do the ADN2813 and ADN2812 support?
The ADN2813 supports continuous data rates from 10 Mbps to 675 Mbps, while the ADN2812 supports continuous data rates from 12.3 Mbps to 2.7 Gbps. The ADN2812 therefore covers higher-rate SONET/SDH, Fibre Channel, and Gigabit Ethernet applications that exceed the ADN2813's upper limit.
Are the ADN2813ACPZ and ADN2812ACPZ-RL7 pin-compatible or drop-in replacements?
No. They are different devices with different maximum data rates and different package/pin configurations. The ADN2813ACPZ is a 32-lead LFCSP, and the ADN2812 is offered in a 32-lead LFCSP as well, but the pin functions and external component requirements differ. A direct drop-in substitution should not be assumed; the datasheets must be compared pin-by-pin and the surrounding circuitry revalidated.
What is the difference between the ADN2812ACPZ and ADN2812ACPZ-RL7 ordering codes?
The base device is the ADN2812ACPZ. The -RL7 suffix indicates tape-and-reel packaging for automated assembly, typically with a defined reel quantity. Electrically and functionally the devices are identical; only the shipping/packaging format differs.
What supply voltage and power consumption do these CDRs require?
Both devices operate from a single 3.3 V supply (3.0 V to 3.6 V range). The ADN2813 typically consumes about 300 mW, while the ADN2812 typically consumes about 600 mW, reflecting its higher data-rate capability. Exact values should be confirmed against the respective Analog Devices datasheets for the specific operating conditions.
What output interface do the ADN2813 and ADN2812 provide?
Both provide recovered clock and retimed data outputs in CML (current-mode logic) format, suitable for driving high-speed differential interfaces. They also include loss-of-lock (LOL) and loss-of-signal (LOS) status outputs for system monitoring. The ADN2812 additionally supports a wider input data-rate range for multi-rate optical modules.
Which device should be selected for a 2.5 Gbps optical receiver design?
The ADN2812ACPZ-RL7 should be selected, because its specified data-rate range extends to 2.7 Gbps, covering 2.5 Gbps (OC-48/STM-16) operation. The ADN2813ACPZ, limited to 675 Mbps, is not rated for 2.5 Gbps and must not be used in that application.
Do both parts support the same reference clock and loop filter configuration?
No. The required reference clock frequency and the external loop filter component values differ between the ADN2813 and ADN2812 because their VCO ranges and data-rate coverage differ. Each datasheet specifies its own recommended reference clock and loop filter network; these values are not interchangeable between the two devices.