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Hello, Please ask a question about AD9516-2/PCBZ Datasheet
# Example questions:
➢ What are the voltage and current characteristics of the lvpecl clock outputs (out0-out5), and what termination requirements are specified to maintain signal integrity?
➢ What are the typical input frequency ranges for the clk and clk clock inputs, and what are the key considerations when choosing between differential and single-ended input configurations?
➢ What is the relationship between the pll figure of merit (fom) and the pfd frequency, and how does this impact the in-band phase noise performance?
1. General Overview:
️· This is an excerpt from the datasheet for the AD9516-2, a high-performance PLL.
️· The excerpts cover clock inputs, clock outputs, PLL Digital Lock Detect Window, noise characteristics and general parameters.
2. PLL Digital Lock Detect Window:
️· Parameters: Defines the required timing coincidence of edges for digital lock.
️· Ranges: There are Low and High ranges based on the ABP (Active Bandwidth Pulse). ABP can be 1.3ns, 2.9ns, or 6ns.
️· Settings: Controlled by registers 0x17 (bits 1:0) and 0x18 (bit 4).
️· Significance: Crucial for reliable PLL lock, and the period of the PFD frequency must be greater than the unlock-after-lock time.
3. Clock Inputs (CLK, CLK):
️· Input Frequency: 0 - 2.4 GHz
️· Sensitivity (Differential): 2.4 GHz
️· Input Level (Differential): mV p-p
️· Input Common-Mode Voltage (VCM): V
️· Input Common-Mode Range (VCMR): V
️· Input Resistance: kΩ
️· Input Capacitance: pF
️· Notes: Should be DC coupled below 1 MHz. Matching VCM is important.
4. Clock Outputs (LVPECL & LVDS):
️· LVPECL (OUT0-OUT5):
- Maximum Output Frequency: 2950 MHz
- Output Voltage Levels (VOH, VOL, VOD): Defined in terms of Vs.
- Termination: 50Ω to Vs - 2V
️· LVDS (OUT6-OUT9):
- Output Frequency: Up to 800 MHz
- Differential Output Voltage (VOD): Defined in terms of Vs.
- Short-Circuit Current: mA
- Termination: 100Ω
5. Noise Characteristics:
️· In-Band Phase Noise: Specifications for the PLL noise at different PFD frequencies (500 kHz, 1 MHz, 10 MHz, 50 MHz) and a FOM value is also provided.
️· Notes: FOM +10 log(fPFD) gives an approximation of PFD/CP in-band phase noise.
6. Other Important Points (General Notes):
️· "Vs" is used to represent a supply voltage and needs to be defined elsewhere in the datasheet.
️· There's an emphasis on slew rates for optimal jitter performance.
️· Register settings impact many of the parameters.
This summary is based *solely* on the provided text and doesn't include any information from a complete datasheet. Please consult the full datasheet for complete specifications and details.
1. General Overview:
️· This is an excerpt from the datasheet for the AD9516-2, a high-performance PLL.
️· The excerpts cover clock inputs, clock outputs, PLL Digital Lock Detect Window, noise characteristics and general parameters.
2. PLL Digital Lock Detect Window:
️· Parameters: Defines the required timing coincidence of edges for digital lock.
️· Ranges: There are Low and High ranges based on the ABP (Active Bandwidth Pulse). ABP can be 1.3ns, 2.9ns, or 6ns.
️· Settings: Controlled by registers 0x17 (bits 1:0) and 0x18 (bit 4).
️· Significance: Crucial for reliable PLL lock, and the period of the PFD frequency must be greater than the unlock-after-lock time.
3. Clock Inputs (CLK, CLK):
️· Input Frequency: 0 - 2.4 GHz
️· Sensitivity (Differential): 2.4 GHz
️· Input Level (Differential): mV p-p
️· Input Common-Mode Voltage (VCM): V
️· Input Common-Mode Range (VCMR): V
️· Input Resistance: kΩ
️· Input Capacitance: pF
️· Notes: Should be DC coupled below 1 MHz. Matching VCM is important.
4. Clock Outputs (LVPECL & LVDS):
️· LVPECL (OUT0-OUT5):
- Maximum Output Frequency: 2950 MHz
- Output Voltage Levels (VOH, VOL, VOD): Defined in terms of Vs.
- Termination: 50Ω to Vs - 2V
️· LVDS (OUT6-OUT9):
- Output Frequency: Up to 800 MHz
- Differential Output Voltage (VOD): Defined in terms of Vs.
- Short-Circuit Current: mA
- Termination: 100Ω
5. Noise Characteristics:
️· In-Band Phase Noise: Specifications for the PLL noise at different PFD frequencies (500 kHz, 1 MHz, 10 MHz, 50 MHz) and a FOM value is also provided.
️· Notes: FOM +10 log(fPFD) gives an approximation of PFD/CP in-band phase noise.
6. Other Important Points (General Notes):
️· "Vs" is used to represent a supply voltage and needs to be defined elsewhere in the datasheet.
️· There's an emphasis on slew rates for optimal jitter performance.
️· Register settings impact many of the parameters.
This summary is based *solely* on the provided text and doesn't include any information from a complete datasheet. Please consult the full datasheet for complete specifications and details.
| Part No. | AD9516-2/PCBZ |
| Manufacturer | AD |
| Size | 946 Kbytes |
| Pages | 84 pages |
| Description | 14-Output Clock Generator with Integrated 2.2 GHz VCO |
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