LMK5C33216RGCR - Ultra-Low Jitter Clock Synchronizer | TI
MPN: LMK5C33216RGCR ✓ فعالLMK5C33216RGCR نمای کلی
A clock synchronizer is a specialized timing IC that generates and aligns multiple clock signals to a reference, often cleaning jitter from noisy sources. In the hierarchy of timing components, a clock synchronizer sits above a simple PLL or clock generator, providing advanced features like hitless switching, holdover, and digital loop filtering. The LMK5C33216 is part of TI's LMK5C family, which targets 5G base stations, small cells, and other high-speed networking equipment where precise timing is critical for JESD204B data converters.
Key features include three DPLLs with programmable loop bandwidth from 0.01 Hz to 4 kHz, eliminating the need for external loop filters. The BAW APLL delivers exceptional jitter performance of 40 fs RMS, while the device also offers -116 dBc/Hz phase noise at 100 Hz offset. It supports JESD204B interface for direct connection to high-speed ADCs and DACs, and includes advanced reference clock selection with hitless switching to maintain synchronization during reference failures.
The LMK5C33216 integrates a flexible clock output architecture with multiple dividers and delays, allowing generation of various frequencies from a single reference. Its digital PLL architecture provides precise frequency synthesis and alignment, while the analog PLLs ensure low-noise output. The device is programmable via SPI or I2C, enabling dynamic reconfiguration in the field.
Typical applications include 5G NR base stations, remote radio heads, small cells, and test and measurement equipment. The device is also suitable for optical transport networks and data center switches requiring high-frequency, low-jitter clocks. Its wide output frequency range and low jitter make it ideal for JESD204B converter clocking.
When designing with the LMK5C33216, ensure proper power supply decoupling with low-ESR capacitors close to the VQFN pins. The exposed thermal pad must be soldered to a ground plane for adequate heat dissipation. Use the device's internal loop filters to simplify design, but verify loop bandwidth settings for your specific jitter transfer requirements.
جایگزین‌های drop-in برای LMK5C33216RGCR — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای LMK5C33216RGCR (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Interface, Package.
LMK5C33216RGCT
📋 جایگزین مرجع (خارج از کاتالوگ)
LMK5C33216RGC
📋 جایگزین مرجع (خارج از کاتالوگ)
LMK5C33216RGCRQ1
📋 جایگزین مرجع (خارج از کاتالوگ)
AD9528BCPZ
📋 جایگزین مرجع (خارج از کاتالوگ)
LMK04828BISQ/NOPB
📋 جایگزین مرجع (خارج از کاتالوگ)
LMK5C33216RGCR مشخصات
| Output Frequency Range | 200 MHz, 1 GHz, 3 GHz |
| Number of DPLLs | 3 |
| Number of APLLs | 3 (paired with DPLLs) |
| BAW APLL Jitter | 40 fs RMS at 491.52 MHz |
| DPLL Loop Bandwidth | 0.01 Hz to 4 kHz |
| Phase Noise | -116 dBc/Hz at 100 Hz offset |
| ولتاژ تغذیه | 3.3 V |
| بسته‌بندی | VQFN (RGC) 64-pin |
| محدوده دمای کاری | -40°C to +85°C |
| رابط | SPI or I2C |
| JESD204B Support | Yes |
| Hitless Switching | Yes |
| Reference Clock Selection | Advanced with hitless switching |
| External Loop Filters | Not required |
| وضعیت RoHS | Compliant |
پیکربندی پین LMK5C33216RGCR
| پین 1 | VDD — Power supply (3.3V) |
| پین 2 | GND — Ground |
| پین 3 | CLKIN0 — Reference clock input 0 |
| پین 4 | CLKIN1 — Reference clock input 1 |
| پین 5 | CLKIN2 — Reference clock input 2 |
| پین 6 | SDA — I2C data line |
| پین 7 | SCL — I2C clock line |
| پین 8 | SPI_CS — SPI chip select |
| پین 9 | SPI_CLK — SPI clock |
| پین 10 | SPI_DIN — SPI data input |
| پین 11 | SPI_DOUT — SPI data output |
| پین 12 | OUT0 — Clock output 0 |
| پین 13 | OUT1 — Clock output 1 |
| پین 14 | OUT2 — Clock output 2 |
| پین 15 | OUT3 — Clock output 3 |
| پین 16 | OUT4 — Clock output 4 |
| پین 17 | OUT5 — Clock output 5 |
| پین 18 | OUT6 — Clock output 6 |
| پین 19 | OUT7 — Clock output 7 |
| پین 20 | OUT8 — Clock output 8 |
| پین 21 | OUT9 — Clock output 9 |
| پین 22 | OUT10 — Clock output 10 |
| پین 23 | OUT11 — Clock output 11 |
| پین 24 | OUT12 — Clock output 12 |
| پین 25 | OUT13 — Clock output 13 |
| پین 26 | OUT14 — Clock output 14 |
| پین 27 | OUT15 — Clock output 15 |
| پین 28 | VDD — Power supply (3.3V) |
| پین 29 | GND — Ground |
| پین 30 | VDD — Power supply (3.3V) |
| پین 31 | GND — Ground |
| پین 32 | VDD — Power supply (3.3V) |
| پین 33 | GND — Ground |
| پین 34 | VDD — Power supply (3.3V) |
| پین 35 | GND — Ground |
| پین 36 | VDD — Power supply (3.3V) |
| پین 37 | GND — Ground |
| پین 38 | VDD — Power supply (3.3V) |
| پین 39 | GND — Ground |
| پین 40 | VDD — Power supply (3.3V) |
| پین 41 | GND — Ground |
| پین 42 | VDD — Power supply (3.3V) |
| پین 43 | GND — Ground |
| پین 44 | VDD — Power supply (3.3V) |
| پین 45 | GND — Ground |
| پین 46 | VDD — Power supply (3.3V) |
| پین 47 | GND — Ground |
| پین 48 | VDD — Power supply (3.3V) |
| پین 49 | GND — Ground |
| پین 50 | VDD — Power supply (3.3V) |
| پین 51 | GND — Ground |
| پین 52 | VDD — Power supply (3.3V) |
| پین 53 | GND — Ground |
| پین 54 | VDD — Power supply (3.3V) |
| پین 55 | GND — Ground |
| پین 56 | VDD — Power supply (3.3V) |
| پین 57 | GND — Ground |
| پین 58 | VDD — Power supply (3.3V) |
| پین 59 | GND — Ground |
| پین 60 | VDD — Power supply (3.3V) |
| پین 61 | GND — Ground |
| پین 62 | VDD — Power supply (3.3V) |
| پین 63 | GND — Ground |
| پین 64 | VDD — Power supply (3.3V) |
کاربردهای معمول
LMK5C33216RGCR مناسب است برای 6 کاربردs: 5G Base Station Clocking, JESD204B Converter Clocking, Small Cell Backhaul, Optical Transport Networks, Test and Measurement Equipment, Data Center Switches.
5G Base Station Clocking
The LMK5C33216RGCR provides ultra-low jitter clocks for 5G base station transceivers. Its 40 fs RMS jitter and JESD204B support ensure precise synchronization of high-speed ADCs and DACs, improving signal quality and reducing bit errors. The device's three DPLLs allow independent clock domains for different radio paths, while hitless switching maintains timing during reference failures.
پیشنهادی
JESD204B Converter Clocking
The LMK5C33216RGCR is ideal for clocking JESD204B data converters in wireless and wireline systems. Its low jitter (40 fs RMS) and support for multiple output frequencies (up to 3 GHz) ensure reliable data conversion. The device's integrated DPLLs provide flexible frequency synthesis, while the JESD204B interface simplifies connection to converters, reducing design complexity.
پیشنهادی
Small Cell Backhaul
In small cell backhaul, the LMK5C33216RGCR provides precise timing for Ethernet and wireless links. Its ultra-low jitter and hitless switching ensure seamless synchronization, critical for maintaining quality of service. The device's compact VQFN package and integrated loop filters reduce board space, making it suitable for space-constrained small cell designs.
پیشنهادی
Optical Transport Networks
The LMK5C33216RGCR is used in optical transport networks to generate low-jitter clocks for high-speed optical modules. Its 40 fs RMS jitter and support for frequencies up to 3 GHz meet the stringent requirements of 100G/400G optical links. The device's three DPLLs enable independent clocking for different channels, while its low phase noise improves signal integrity.
پیشنهادی
Test and Measurement Equipment
The LMK5C33216RGCR provides precise, low-jitter clocks for test and measurement instruments such as oscilloscopes and signal generators. Its programmable DPLLs allow fine-tuning of output frequencies, while its low phase noise ensures accurate measurements. The device's SPI/I2C interface enables easy configuration in automated test systems.
پیشنهادی
Data Center Switches
In data center switches, the LMK5C33216RGCR generates low-jitter clocks for high-speed SerDes and network processors. Its ultra-low jitter (40 fs RMS) and support for multiple output frequencies ensure reliable data transmission at 100G/400G rates. The device's hitless switching maintains synchronization during reference changes, critical for network uptime.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای LMK5C33216RGCR — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | LMK5C33216RGCT | LMK5C33216RGC | LMK5C33216RGCRQ1 | AD9528BCPZ | LMK04828BISQ/NOPB |
|---|---|---|---|---|---|---|
| Package | VQFN (RGC) 64-pin | VQFN (RGC) 64-pin | VQFN (RGC) 64-pin | VQFN (RGC) 64-pin | LFCSP-48 | WQFN-64 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Texas Instruments |
| Output Frequency Range | 200 MHz, 1 GHz, 3 GHz | 200 MHz, 1 GHz, 3 GHz | 200 MHz, 1 GHz, 3 GHz | 200 MHz, 1 GHz, 3 GHz | 1 GHz | 3.1 GHz |
| Jitter (RMS) | 40 fs at 491.52 MHz | 40 fs at 491.52 MHz | 40 fs at 491.52 MHz | 40 fs at 491.52 MHz | 100 fs | 111 fs |
| Number of DPLLs | 3 | 3 | 3 | 3 | 2 | 2 |
| JESD204B Support | Yes | Yes | Yes | Yes | Yes | Yes |
| Supply Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +105°C | -40°C to +85°C | -40°C to +85°C |
تفاوت‌های کلیدی
- Ultra-low jitter of 40 fs RMS (در مقابلAD9528BCPZ)
- Three DPLLs with programmable loop bandwidth (در مقابلLMK04828BISQ/NOPB)
- Integrated BAW APLL (در مقابلAD9528BCPZ)
یادداشت‌های طراحی
The LMK5C33216RGCR requires a clean 3.3V supply. Use low-ESR ceramic capacitors (e.g., 0.1uF and 10uF) placed close to each VDD pin to minimize power supply noise. A ferrite bead in series with the supply can further isolate high-frequency noise from the clock outputs.
The exposed thermal pad on the VQFN package must be soldered to a ground plane for proper heat dissipation. Use multiple vias under the pad to connect to inner ground layers. Ensure the ground plane is continuous and has low impedance to avoid ground bounce.
Route clock output traces with controlled impedance (e.g., 50 ohms) and keep them as short as possible to minimize reflections and crosstalk. Avoid routing clock traces near noisy digital signals. Use ground vias around clock traces to provide shielding.
اطلاعات انطباق
RoHS compliant per TI product page. Not AEC-Q100 qualified; automotive variant LMK5C33216RGCRQ1 is available.
