Part A
AD9516-4BCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1951 PCS
- Package
- LFCSP-64
- Series
- Horário - Geradores de relógios, PLLs, Sintetizadores de Frequências
Replacement verdict
Not a drop-in replacement
The AD9516-4BCPZ and AD9511BCPZ are not functionally interchangeable: they differ in output architecture, channel count, package footprint, and input frequency range, so substituting one for the other requires a full board-level redesign and timing re-validation rather than a direct swap.
Different output type
Different channel count
Different footprint
Different input frequency range
Parts at a glance
Part B
AD9511BCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6646 PCS
- Series
- Horário-Horário - Clock Buffers, Drivers
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD9516-4BCPZ | AD9511BCPZ | Why it matters |
|---|---|---|---|
| Number of Outputs | 14 outputs (LVPECL, LVDS, CMOS configurable) | 5 outputs (LVPECL/LVDS/CMOS) | Output count determines how many clock destinations can be driven; a board needing more clock fan-out cannot substitute a lower-output device. |
| On-Chip VCO | Yes, integrated VCO (2.4 GHz to 2.95 GHz) | No, external VCO/VCXO required | An integrated VCO simplifies the clock generation design and reduces external component count; a device without one requires an external oscillator. |
| Maximum Output Frequency | 1.6 GHz (LVPECL) | 1.2 GHz (LVPECL) | The maximum output frequency limits the highest clock rate the device can deliver to downstream converters or logic. |
| Input Frequency Range | Up to 250 MHz (reference input) | Up to 1.6 GHz (differential input) | The input range determines which reference or clock sources can be accepted directly without additional conditioning. |
| Package | 64-lead LFCSP (9 mm x 9 mm) | 48-lead LFCSP (7 mm x 7 mm) | Package footprint and pin count affect PCB layout and are not drop-in compatible between the two devices. |
| Supply Voltage | 3.3 V (core and outputs) | 3.3 V | Supply voltage compatibility ensures the device can share the same power rail as surrounding circuitry. |
| On-Chip Dividers | Multiple programmable dividers (R, A, B, and per-output dividers) | Programmable dividers (R, A, B, and output dividers) | Divider flexibility determines the range of output frequencies that can be synthesized from a given input reference. |
| Delay Adjustment | Programmable delay on outputs | Programmable delay on outputs | Output delay adjustment allows skew matching between clock paths, critical for multi-converter synchronization. |
| Jitter (Additive) | Low additive jitter (approx. 0.2 ps RMS typical) | Low additive jitter (approx. 0.3 ps RMS typical) | Additive jitter directly impacts signal integrity and achievable SNR in high-speed data converters. |
| Control Interface | SPI (3-wire/4-wire) | SPI (3-wire/4-wire) | A compatible serial control interface allows reuse of existing firmware and microcontroller drivers. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9516-4BCPZ | AD9511BCPZ |
|---|---|---|
| Part Status | Active | Active |
| Type | Clock Generator, Fanout Distribution | Fanout Buffer (Distribution), Divider |
| Number of Circuits | 1 | 1 |
| Ratio - Input: Output | 1:14 | 2:5 |
| Differential - Input: Output | Yes/Yes | Yes/Yes |
| Input | Clock | Clock |
| Output | CMOS, LVDS, LVPECL | CMOS, LVDS, LVPECL |
| Frequency - Max | 2.95GHz | 1.2 GHz |
| Voltage - Supply | 3.135V ~ 3.465V | 3.135V ~ 3.465V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | - | AD9511 |
| PLL | Yes | - |
| Divider / Multiplier | Yes/No | - |
Frequently asked questions
What are the primary functional differences between the AD9516-4BCPZ and the AD9511BCPZ?
The AD9516-4BCPZ is a 14-output clock generator with an integrated VCO (2.5 GHz to 2.95 GHz), while the AD9511BCPZ is a 5-output clock distribution IC with a divide-by-2 prescaler and no integrated VCO. The AD9516-4BCPZ integrates the VCO and PLL, whereas the AD9511BCPZ requires an external VCO or clock source.
Are the AD9516-4BCPZ and AD9511BCPZ pin-compatible or package-compatible?
No. The AD9516-4BCPZ is supplied in a 64-lead LFCSP (9 mm × 9 mm) package, while the AD9511BCPZ is supplied in a 48-lead LFCSP (7 mm × 7 mm) package. The pin counts, pin functions, and PCB land patterns differ, so they are not drop-in replacements.
How do the output configurations of the AD9516-4BCPZ and AD9511BCPZ compare?
The AD9516-4BCPZ provides up to 14 outputs: six LVPECL outputs, four LVDS outputs, and four CMOS outputs (configurable in pairs). The AD9511BCPZ provides five outputs: four LVPECL outputs and one adjustable CMOS output. Output count and logic levels differ significantly between the two devices.
Do both devices include an on-chip PLL and VCO?
The AD9516-4BCPZ includes an on-chip integer-N PLL and an integrated VCO tunable from 2.5 GHz to 2.95 GHz. The AD9511BCPZ includes a PLL with a divide-by-2 prescaler but does not include an integrated VCO; it requires an external VCO or clock input.
What are the input frequency and reference requirements for each device?
The AD9516-4BCPZ accepts a reference input for its PLL and can also accept an external clock; its integrated VCO operates from 2.5 GHz to 2.95 GHz. The AD9511BCPZ accepts an external VCO or clock input and includes a divide-by-2 prescaler, with its PLL reference input specified in the datasheet. Designers must verify input frequency ranges against the respective datasheets for their target configuration.
Can the AD9511BCPZ be used as a direct substitute for the AD9516-4BCPZ in an existing design?
No. The devices differ in package size and pin count (64-lead vs 48-lead LFCSP), output count and types (14 outputs vs 5 outputs), and VCO integration (integrated vs external). A direct substitution is not possible without redesigning the PCB, clock tree, and PLL/VCO circuitry.
Which device is better suited for applications requiring many clock outputs?
The AD9516-4BCPZ is better suited for high-output-count applications because it provides up to 14 outputs (LVPECL, LVDS, and CMOS). The AD9511BCPZ provides only five outputs (four LVPECL and one CMOS), making it more appropriate for lower-output-count distribution designs.
Do both devices support LVPECL and LVDS output logic levels?
The AD9516-4BCPZ supports LVPECL, LVDS, and CMOS outputs. The AD9511BCPZ supports LVPECL outputs and one adjustable CMOS output, but does not provide LVDS outputs. Therefore, LVDS output capability is exclusive to the AD9516-4BCPZ in this comparison.