ADRF5721 - 4-Bit Digital Attenuator 9kHz-40GHz | Analog Devices
部品番号: ADRF5721 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $10 | $1,000.00 |
| 500 | $9 | $4,500.00 |
| 1,000 | $8.1 | $8,100.00 |
ADRF5721 概要
A digital attenuator is a type of RF component that reduces the amplitude of a signal by a controlled amount, typically using switched resistor networks or PIN diodes. It is a key building block in RF front-ends, enabling precise gain control in transceivers, test equipment, and radar systems. The ADRF5721 belongs to the family of RF attenuators, which are essential for signal conditioning and power leveling in communication systems.
Key features of the ADRF5721 include a 30 dB attenuation range with 2 dB steps, 50 Ω characteristic impedance, and RF input power handling of 26 dBm average and 30 dBm peak for all states. The device is pin compatible with the ADRF5731, a fast switching version operating from 100 MHz to 40 GHz, allowing design flexibility. The LGA package is ideal for space-constrained designs, and the wide frequency range covers everything from HF to Ka-band.
The ADRF5721 uses a silicon process that provides high linearity and consistent performance across frequency. The 4-bit control interface allows 16 attenuation states, from 0 dB to 30 dB, with monotonic behavior. The device is designed for 50 Ω systems, ensuring minimal VSWR and predictable insertion loss. The ATTIN port can handle up to 26 dBm average power, making it robust for transmitter and receiver applications.
Typical applications include cellular infrastructure, microwave backhaul, radar systems, electronic warfare, and test and measurement equipment. The wide frequency range and high power handling make it versatile for both commercial and military RF systems. In a 5G base station, the ADRF5721 can be used in the transmit path to adjust output power, or in the receive path to prevent overload.
When designing with the ADRF5721, ensure proper grounding and decoupling on the control pins to avoid digital noise coupling into the RF path. The LGA package requires a well-designed PCB layout with adequate thermal vias for heat dissipation. The device is RoHS compliant and lead-free, meeting modern environmental standards.
ドロップイン代替品: ADRF5721 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ADRF5721 （同一形状・フットプリント） — 相違点: Attenuation Range, Control Interface, Insertion Loss, Package, Pin Compatibility.
クイック比較ツール — 並列比較する代替部品を選択:
ADRF5731BCCZN
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADRF5720BCCZN
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ADRF5740BCCZN
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PE43711A
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
HMC472ALP4E
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ADRF5721 仕様
| Type | Silicon 4-bit digital attenuator |
| Attenuation Range | 30 dB |
| Attenuation Step | 2 dB |
| Frequency Range | 9 kHz to 40 GHz |
| Insertion Loss | 3.4 dB (max) |
| Impedance | 50 Ω |
| RF Input Power (Average) | 26 dBm |
| RF Input Power (Peak) | 30 dBm |
| Control Interface | 4-bit parallel |
| パッケージ | 16-terminal LGA, 2.5 mm × 2.5 mm |
| 動作温度 | -40°C to +105°C |
| RoHS | Compliant |
| Lead-Free | Yes |
| 実装タイプ | Surface Mount |
| Pin Compatibility | Pin compatible with ADRF5731 |
ADRF5721 ピン構成
| ピン 1 | ATTIN — RF input |
| ピン 2 | GND — Ground |
| ピン 3 | D0 — Control bit 0 (LSB) |
| ピン 4 | D1 — Control bit 1 |
| ピン 5 | D2 — Control bit 2 |
| ピン 6 | D3 — Control bit 3 (MSB) |
| ピン 7 | LE — Latch enable |
| ピン 8 | SEROUT — Serial output for daisy chaining |
| ピン 9 | GND — Ground |
| ピン 10 | ATTOUT — RF output |
| ピン 11 | GND — Ground |
| ピン 12 | GND — Ground |
| ピン 13 | GND — Ground |
| ピン 14 | GND — Ground |
| ピン 15 | GND — Ground |
| ピン 16 | GND — Ground |
主な用途
ADRF5721 の用途: 6 件s: 5G Infrastructure, Radar Systems, Test and Measurement, Electronic Warfare, Satellite Communications, Microwave Backhaul.
5G Infrastructure
The ADRF5721 is ideal for 5G base stations and small cells, providing precise gain control in transmit and receive paths. Its wide frequency range up to 40 GHz covers mmWave bands, and its high power handling of 26 dBm average ensures robust performance. The low insertion loss of 3.4 dB helps maintain signal integrity, while the 4-bit interface allows fast attenuation adjustments for dynamic power control.
おすすめ
Radar Systems
In radar systems, the ADRF5721 is used for gain leveling and protection. Its 30 dB attenuation range in 2 dB steps allows precise control of signal levels, while the 50 Ω impedance ensures compatibility with standard RF components. The device operates from 9 kHz to 40 GHz, covering various radar bands, and can handle peak power up to 30 dBm, making it suitable for high-power transmit/receive modules.
おすすめ
Test and Measurement
The ADRF5721 is widely used in test equipment such as signal generators, spectrum analyzers, and network analyzers. Its wide frequency range and precise attenuation steps enable accurate signal level setting. The 4-bit parallel interface simplifies integration with microcontrollers, and the compact LGA package saves board space. The device's high linearity ensures minimal distortion in measurement paths.
おすすめ
Electronic Warfare
In electronic warfare systems, the ADRF5721 provides fast and accurate attenuation for signal conditioning and jamming. Its wide frequency range from 9 kHz to 40 GHz covers multiple bands, and the high power handling of 26 dBm average ensures reliability in harsh environments. The device's small size and low insertion loss are critical for compact, high-performance EW modules.
おすすめ
Satellite Communications
The ADRF5721 is used in satellite communication systems for gain control in both uplink and downlink paths. Its frequency range up to 40 GHz covers Ku, Ka, and V bands, and the 50 Ω impedance matches standard satellite RF components. The device's low insertion loss and high power handling make it suitable for high-throughput satellite systems, while the 4-bit control allows precise power leveling.
おすすめ
Microwave Backhaul
In microwave backhaul systems, the ADRF5721 is used for automatic gain control and power leveling. Its wide frequency range from 9 kHz to 40 GHz covers common backhaul bands, and the 30 dB attenuation range provides sufficient adjustment. The device's high power handling and low insertion loss ensure reliable performance in point-to-point links, while the compact package simplifies integration into outdoor units.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ADRF5721 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ADRF5731BCCZN | ADRF5720BCCZN | ADRF5740BCCZN | PE43711A | HMC472ALP4E |
|---|---|---|---|---|---|---|
| Package | 16-terminal LGA | 16-terminal LGA | 16-terminal LGA | 16-terminal LGA | 16-terminal LGA | 16-terminal LGA |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | pSemi | Analog Devices |
| Frequency Range | 9 kHz to 40 GHz | 100 MHz to 40 GHz | 9 kHz to 40 GHz | 9 kHz to 40 GHz | 9 kHz to 40 GHz | DC to 3.8 GHz |
| Attenuation Range | 30 dB | 30 dB | 31.5 dB | 15.5 dB | 31 dB | 31.5 dB |
| Step Size | 2 dB | 2 dB | 0.5 dB | 0.5 dB | 0.5 dB | 0.5 dB |
| Insertion Loss | 3.4 dB | 3.4 dB | 3.4 dB | 3.4 dB | 2.5 dB | 2.5 dB |
| RF Input Power (Average) | 26 dBm | 26 dBm | 26 dBm | 26 dBm | 30 dBm | 24 dBm |
| Control Interface | 4-bit parallel | 4-bit parallel | 6-bit parallel | 5-bit parallel | SPI | 6-bit parallel |
主な差別化要因
- Wide frequency range from 9 kHz to 40 GHz （vs HMC472ALP4E)
- High power handling of 26 dBm average （vs HMC472ALP4E)
- Pin compatible with ADRF5731 （vs PE43711A)
設計ノート
Ensure proper grounding and thermal management for the LGA package. Use multiple vias under the exposed pad to connect to the ground plane, and follow the recommended PCB layout in the datasheet to minimize parasitic inductance and ensure optimal RF performance.
Keep RF traces as short as possible and use controlled impedance (50 Ω) lines. Place decoupling capacitors close to the control pins to filter digital noise, and avoid routing high-speed digital signals near the RF path to prevent coupling.
Do not exceed the maximum RF input power of 30 dBm peak, as this can damage the device. Also, ensure the control interface is properly latched to avoid unintended attenuation states. Refer to the datasheet for timing requirements of the LE and data pins.
コンプライアンス情報
RoHS compliant per datasheet. Lead-free. No AEC-Q100 qualification indicated.
