800 MHz时,呈线性dB的VGA与AGC检波器 800 MHz, Linear-in-dB VGA with AGC Detector
Product Details
The AD8368 is a variable gain amplifier VGA with analog linear-in-dB gain control that can be used from low frequencies to 800 MHz. Its excellent gain range, conformance, and flatness are attributed to the Analog Devices, Inc. X-AMP® architecture, an innovative technique for implementing high performance variable gain control.
The gain range of −12 dB to +22 dB is scaled accurately to 37.5 dB/V with excellent conformance error. The AD8368 has a 3 dB bandwidth of 800 MHz that is nominally independent of gain setting. At 140 MHz, the OIP3 is 33 dBm at maximum gain. The output noise floor is −143 dBm/Hz, which corresponds to a 9.5 dB noise figure at maximum gain. The single-ended input and output impedances are nominally 50 Ω.
The gain of the AD8368 can be configured to be an increasing or decreasing function of the gain control voltage depending on whether the MODE pin is pulled to the positive supply or to ground, respectively. When MODE is pulled high, the AD8368 operates as a typical VGA with increasing gain.
By connecting MODE to ground and using the on-board rms detector, the AD8368 can be configured as a complete automatic gain control AGC system with RSSI. The output power is accurately leveled to the internal default setpoint of 63 mV rms −11 dBm referenced to 50 Ω, independent of the waveform crest factor. Because the uncommitted detector input is available at DETI, the AGC loop can level the signal at the AD8368 output or at any other point in the signal chain over a maximum input power range of 34 dB. Furthermore, the setpoint level can be raised by dividing down the output signal before applying it to the detector.
The AD8368 operates from a supply voltage of 4.5 V to 5.5 V and consumes 60 mA of current. It can be fully powered down to <3 mA by grounding the ENBL pin. The AD8368 is fabricated using the Analog Devices proprietary SiGe SOI complementary bipolar IC process. It is available in a 24-lead LFCSP and operates over the industrial temperature range of −40°C to +85°C. Application boards are available upon request.
**Applications**
* Complete IF AGC amplifiers
* Gain trimming and leveling
* Cellular base stations
* Point-to-point radio links
* RF instrumentation
Data Sheet, Rev. B, 09/2008
### Features and Benefits
供电电流 60 mA
电路数 1
通道数 1
耗散功率 440 mW
增益频宽积 800 MHz
增益 22.0 dB
工作温度Max 85 ℃
工作温度Min -40 ℃
3dB带宽 800 MHz
耗散功率Max 440 mW
电源电压Max 5V ~ 7V
安装方式 Surface Mount
引脚数 24
封装 LFCSP-24
封装 LFCSP-24
工作温度 -40℃ ~ 85℃
产品生命周期 Active
包装方式 Tray
制造应用 Aerospace and Defense, Milcom
RoHS标准 RoHS Compliant
含铅标准 Contains Lead
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
AD8368ACPZ-WP ADI 亚德诺 | 当前型号 | 当前型号 |
ADL5330ACPZ-REEL7 亚德诺 | 类似代替 | AD8368ACPZ-WP和ADL5330ACPZ-REEL7的区别 |
AD8368ACPZ-REEL7 亚德诺 | 类似代替 | AD8368ACPZ-WP和AD8368ACPZ-REEL7的区别 |
ADL5330ACPZ-R2 亚德诺 | 功能相似 | AD8368ACPZ-WP和ADL5330ACPZ-R2的区别 |