The AD8315ARMZ-RL is a complete low cost subsystem for the precisecontrol of RF power amplifiers operating in the frequency range0.1 GHz to 2.5 GHz and over a typical dynamic range of 50 dB.It is intended for use in cellular handsets and other batteryoperatedwireless devices. The log amp technique provides a muchwider measurement range and better accuracy than controllersusing diode detectors. In particular, the temperature stability isexcellent over a specified range of −30°C to +85°C.
Its high sensitivity allows control at low signal levels, thusreducing the amount of power that must be coupled tothe detector.
For convenience, the signal is internally ac-coupled. Thishigh-pass coupling, with a corner at approximately 0.016 GHz,determines the lowest operating frequency. Therefore, thesource can be dc grounded.
The AD8315ARMZ-RL provides a voltage output, VAPC, that has thevoltage range and current drive to directly connect to mosthandset power amplifiers’ gain control pin. VAPC can swingfrom 250 mV above ground to within 200 mV below the supplyvoltage. Load currents of up to 6 mA can be supported.
The setpoint control input is applied to the VSET pin and hasan operating range of 0.25 V to 1.4 V. The associated circuitdetermines the slope and intercept of the linear-in-dBmeasurement system; these are nominally 23 mV/dB and−60 dBm for a 50 Ω termination (−73 dBV) at 0.9 GHz.Further simplifying the application of the AD8315, the inputresistance of the setpoint interface is over 100 MΩ, and the biascurrent is typically 0.5 μA.
The AD8315ARMZ-RL is available in MSOP and LFCSP packages andconsumes 8.5 mA from a 2.7 V to 5.5 V supply. When powereddown, the sleep current is 4 μA.
類型 | 描述 | 全選 |
---|---|---|
頻率 | 100MHz ~ 2.5GHz | |
射頻類型 | DCS,GSM,ISM | |
產品狀態 | 在售 | |
包裝 | 卷帶(TR) | |
供應商器件封裝 | 8-MSOP | |
封裝/外殼 | 8-TSSOP,8-MSOP(0.118",3.00mm 寬) |
Analog Devices Inc.
Analog Devices(納斯達克股票代碼:ADI)是設計、製造和營銷廣泛的高性能模擬、混合信號和數碼訊號處理 (DSP) 集成電路 (IC) 產品組合的全球領導者,這些產品幾乎用於所有類型的 電子設備。 自 1965 年成立以來,他們一直專注於解決與電子設備信號處理相關的工程挑戰。 他們的信號處理產品已被全球超過 100,000 家客户使用,在將温度、壓力、聲音、光、速度和運動等現實世界現象轉換、調節和處理為電信號以用於廣泛應用方面發揮着重要作用 的電子設備。 Maxim Integrated 現在是 Analog Devices 的一部分。 結合起來,它們提供了一套擴展的頂級性能混合信號和電源管理技術,以幫助客户在日益數碼化、無處不在的感知和互聯世界中取得成功。 他們廣泛的工程能力和深度的領域專業知識共同幫助我們的客户解決從直流到 100 GHz、從納瓦到千瓦、從傳感器到雲的最複雜問題。
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