ADF4216BRU - Dual Integer-N PLL Synthesizer 1.2 GHz | Analog Devices
料号： ADF4216BRU ✓ 量产中ADF4216BRU 概述
A PLL frequency synthesizer is a closed-loop timing device in which a voltage-controlled oscillator (VCO) output is phase- and frequency-locked to a stable reference source through a phase frequency detector and charge pump. It sits in the RF and IF signal chain of wireless transmitters and receivers, converting a single low-frequency reference into the high, spectrally pure local oscillator tones required for up-conversion and down-conversion. The hierarchy runs from phase-locked loop to frequency synthesizer to clock and timing IC to integrated circuit.
The ADF4216 supports programmable reference, RF, and IF N-divider ratios, selectable charge pump currents, and selectable dual-modulus prescalers of 16/17 for the IF chain and 64/65 for the RF chain. Because the loop is integer-N, the synthesizer frequency is the reference frequency multiplied by an integer ratio, giving excellent phase noise and very low reference feedthrough at the cost of fractional-N flexibility. A dedicated power-down mode shuts the part down for leakage control between burst transmissions.
Operated from a 3 V to 5.5 V supply, the device integrates everything a designer needs for a dual-LO transceiver front end: two independent synthesizer channels that can drive both the RF and IF sections of a wireless receiver or transmitter. The 3-wire serial interface allows the divider ratios, prescaler, charge pump, and counter settings to be loaded from a host microcontroller or baseband processor.
Typical applications include GSM and CDMA wireless handsets, wireless local loop and base-station equipment, WCDMA and TD-SCDMA transceiver front ends, RFID readers, microwave and satellite up/down converters, and instrumentation. In each case the device replaces separate oscillators and dividers while tightening phase noise and reducing board area.
When designing around the ADF4216, pay close attention to loop filter component selection, reference phase noise, and the charge pump setting. A mismatched charge pump current and bandwidth combination produces high reference spurs, while an aggressive loop bandwidth trades phase noise for lock time. Keep the reference and RF traces short and well decoupled, and follow the grounding and decoupling layout recommended in the manufacturer datasheet.
This page combines verified distributor and manufacturer information with drop-in alternatives, a parameter-by-parameter comparison table, and practical design notes that go beyond the raw datasheet tables, helping engineers shortlist, source, and lay out the part with confidence.
直接替换替代料： ADF4216BRU ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ADF4216BRU （相同外形与封装尺寸） ——差异在于 Package, Power-Down Mode, Serial Interface.
ADF4218BRU
✅ 直接替换联系询价
查看数据手册 →ADF4217BRU
✅ 直接替换📋 参考替代料（不在目录中）
ADF4218LBRU
✅ 直接替换📋 参考替代料（不在目录中）
ADF4216BRUZ-RL
✅ 直接替换📋 参考替代料（不在目录中）
ADF4212LBRUZ-RL
✅ 直接替换📋 参考替代料（不在目录中）
ADF4216BRU 规格参数
| Device Type | Dual RF PLL frequency synthesizer (integer-N) |
| RF Output Frequency Range | 550 MHz to 1.2 GHz |
| Input Reference Frequency Range | 5 MHz to 1.2 GHz |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Nominal Supply Voltage | 3 V to 5.5 V |
| RF Prescaler | 64/65 selectable dual modulus |
| IF Prescaler | 16/17 selectable dual modulus |
| Charge Pump Current | Selectable |
| Serial Interface | 3-wire serial interface |
| Power-Down Mode | Yes |
| Number of Channels | 2 (RF and IF) |
| 封装 | 20-lead TSSOP, 0.173 in x 4.40 mm width |
| 引脚数量 | 20 pins |
| 安装类型 | Surface mount |
| Shipping Package | Tube (tray) |
ADF4216BRU tube (tray) 引脚配置指南
ADF4216BRU（tube (tray) 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： ADF4216BRU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ADF4216BRU 适用于 6 应用s: GSM and CDMA Wireless Handset Transceiver, Wireless Local Loop and Base Station RF Front End, Microwave and Satellite Up/Down Converter LO, RFID and UHF Reader Transceiver, Test and Measurement Instrumentation, Industrial and Automotive Telemetry Links.
GSM and CDMA Wireless Handset Transceiver
The ADF4216BRU fits handset up/down conversion because it delivers two independent integer-N local oscillator channels from a single 3 V to 5.5 V supply, letting one channel drive the RF mixers and the second drive the IF stage. With a 550 MHz to 1.2 GHz RF range, a selectable 64/65 RF prescaler and 16/17 IF prescaler, it covers the transmit and receive LO requirements of GSM and CDMA-class terminals while keeping the 20-lead TSSOP footprint small for handset PCB area budgets. The integer-N architecture gives clean close-in phase noise and low reference feedthrough, which directly improves receiver sensitivity and transmit spur compliance. A dedicated power-down mode lets the synthesizer shut down between bursts, reducing standby current in the phone's duty-cycled RF architecture. Designers pair it with an external VCO and a passive or active loop filter sized against the selectable charge pump current, and the 3-wire serial interface lets the baseband processor retune the LO whenever the handset moves between bands.
推荐
Wireless Local Loop and Base Station RF Front End
Fixed wireless and small base-station transceivers benefit from the ADF4216BRU because a single synthesizer replaces separate oscillators and dividers for both RF and IF local oscillator paths, reducing board area and cost while tightening phase noise. The programmable reference divider and RF/IF N-counters let one reference source feed several channels, and the selectable charge pump currents allow the loop filter to be matched to the loop bandwidth demanded by the transmitter's adjacent-channel requirements. Operating from 2.7 V to 5.5 V allows the part to sit directly behind a 3.3 V or 5 V infrastructure rail without an extra level shifter. In a distributed radio architecture, the low reference feedthrough of the integer-N loop suppresses spurious tones that would otherwise desensitize neighboring cells. The power-down function is useful for sector-sleep modes in low-power base-station designs, while the small TSSOP-20 outline simplifies the repetitive card layout used in sub-6 GHz fixed wireless equipment.
推荐
Microwave and Satellite Up/Down Converter LO
In microwave and satellite up/down converters, the ADF4216BRU generates the local oscillator tone that drives the mixer in the RF or IF section of the converter. Its 550 MHz to 1.2 GHz synthesis range covers the LO bands required by LNB and block down-converter designs that operate with IF frequencies in the 100 MHz to 500 MHz region using the 16/17 IF prescaler. Because the part is a complete integer-N PLL rather than a simple divide-by-N, the reference can be a low-cost crystal oscillator while the loop still delivers the phase noise margin needed for low error rates in QPSK and QAM links. The 20-lead TSSOP package supports dense RF module layouts where an external VCO, loop filter, and decoupling network sit close to the mixer input. Designers choose the ADF4217 or ADF4218 versions when the converter's LO must reach 2.0 GHz or 2.5 GHz for higher-order down-conversion, and they rely on the power-down mode for standby power in portable terminal blocks.
推荐
RFID and UHF Reader Transceiver
UHF RFID readers use the ADF4216BRU to synthesize the local oscillator for the transmitter up-converter and the receiver down-converter, which is critical because RFID backscatter links depend on very low phase noise to keep the read sensitivity high across the 860 MHz to 960 MHz band. The 550 MHz to 1.2 GHz output range covers the UHF ISM bands used in inventory and asset-tracking systems, and the programmable reference divider allows a single 10 MHz or 20 MHz reference to be shared with the reader's digital baseband. Because the loop is integer-N, the reference feedthrough appears as discrete spurs at exact multiples of the reference frequency, so a low-phase-noise TCXO reference directly lowers in-band spur levels. The 3-wire serial interface lets the reader's microcontroller retune the LO for regional band plans and regulatory channel masks, and the power-down mode supports battery-assisted passive reader configurations where duty-cycled operation dominates the power budget. The small TSSOP-20 footprint leaves board area for the PA, LNA, and matching network.
推荐
Test and Measurement Instrumentation
Instrumentation front ends use the ADF4216BRU to derive stable, spectrally pure local oscillator tones for mixers in spectrum analyzers, vector network analyzers, and synthetic receivers. The part's dual-channel architecture lets one synthesizer feed both the RF and IF ports of a wideband mixer, which simplifies calibration loops and reduces the number of reference connections needed on the instrument's backplane. A 3-wire serial interface lets the instrument's embedded controller sweep the LO across a range of frequencies during automated gain and phase calibration, and the power-down mode enables a low-noise measurement state where the synthesizer is not toggling during sensitive acquisitions. The 2.7 V to 5.5 V supply flexibility permits integration with mixed 3.3 V and 5 V analog rails common in wideband instrument architecture, and the small 20-lead TSSOP footprint keeps the LO section compact inside a densely populated rack-mount chassis. Designers pair it with a low-phase-noise reference and a carefully damped loop filter to avoid in-band spurs masking small test signals.
推荐
Industrial and Automotive Telemetry Links
Short-range industrial telemetry and automotive body-comfort links benefit from the ADF4216BRU when a compact, deterministic LO source is needed in a harsh environment. The integer-N loop provides the stable, repeatable output required for OOK, FSK, and GFSK modems used in 2.4 GHz industrial sensor links and 868/915 MHz industrial telemetry bands, all of which fall inside the 550 MHz to 1.2 GHz synthesis range. The 2.7 V minimum supply voltage allows operation directly from regulated 3.3 V automotive or industrial rails, reducing the need for a separate pre-regulator in space-constrained modules. The selectable charge pump current lets the loop filter be tailored for fast lock during link re-establishment while still controlling reference spurs in regulatory-limited bands. The power-down mode supports duty-cycled sensor nodes, and the 20-lead TSSOP package offers a robust surface-mount footprint with wide copper-pour thermal paths that tolerate elevated ambient temperatures common in industrial equipment.
推荐
推荐产品汇总
工程参考数据： ADF4216BRU ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ADF4218BRU | ADF4217BRU | ADF4218LBRU | ADF4216BRUZ-RL | ADF4212LBRUZ-RL |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | TSSOP-20 | TSSOP-20 - same | TSSOP-20 - same | TSSOP-20 - same | TSSOP-20 - same | TSSOP-20 - same |
| Shipping Package | Tube (tray) | Tube (tray) | Tube (tray) | Tape & Reel | Tape & Reel | Tape & Reel |
关键差异点
- Single IC provides both RF and IF local oscillator channels （对比 Discrete oscillator plus divide-by-N approach)
- Higher upper frequency limit than the base part while remaining pin compatible （对比 ADF4216BRU)
- Selectable charge pump current and dual-modulus prescaler for loop flexibility （对比 ADF4212LBRUZ-RL)
- Broad supply range and dedicated power-down for duty-cycled radios （对比 ADF4218BRU family variants)
设计说明
Reference spurs on the ADF4216BRU are dominated by reference feedthrough multiplied directly to the output by the integer N ratio, so reference phase noise and spur level set the in-band spur floor. Use a low-phase-noise TCXO or crystal oscillator with good isolation from the VCO, keep the reference trace short and 50-ohm terminated where possible, and avoid routing the reference and charge pump lines adjacent to the VCO tank on the same layer. Series ferrite or RC filtering at the reference pin, placed close to the IC, is a common technique for attenuating coupled noise before it enters the PFD.
Place the loop filter components immediately adjacent to the charge pump and VCO reference pins, with the loop filter ground return connected directly to the device ground plane rather than through the VCO ground region. Keep the reference divider and prescaler divider routing compact and shielded from the VCO output and the digital serial interface lines. Decouple the supply pins with a close-together ceramic bypass capacitor plus a bulk capacitor, and provide a solid ground pour under the TSSOP-20 footprint to help with both return currents and thermal spread.
The most common mistakes are programming an N-divider ratio that exceeds the prescaler and counter range for the target output frequency, and choosing a charge pump current and loop bandwidth combination that produces either a long lock time or a jittery, spur-ridden loop. Verify the integer N and prescaler settings against the desired LO frequency in the calculator tool provided with the family documentation, and confirm that the PFD frequency stays within the band where the PFD and charge pump remain linear. Also confirm the VCO tuning range actually covers the synthesized output before finalizing the loop filter.
The ADF4216BRU runs from 2.7 V to 5.5 V, and at the low end of that range the charge pump output swing and dynamic range shrink, which can reduce lock margin and degrade close-in phase noise. If your design must work down to 2.7 V, evaluate the charge pump headroom in the loop design rather than assuming 3 V behavior. The power-down mode is intended for standby between transmissions; however, repeatedly entering and leaving power-down can cause the VCO and loop to re-settle, so budget lock time into the burst timing budget of the protocol.
合规信息
The verified distributor and manufacturer pages retrieved on 2026-10-29 did not publish explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements for the ADF4216BRU, so those fields are recorded as unknown rather than assumed. AEC-Q100 is marked not_applicable because the ADF4216BRU is an industrial/consumer clock and timing IC, not an automotive-qualified ordering code. Confirm current compliance declarations with Analog Devices or your authorized distributor before shipping regulated end products.
