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VCA824IDGST

製品説明
仕様・特性

VCA824 VC A8 24 VC A824 www.ti.com....................................................................................................................................... SBOS394C – NOVEMBER 2007 – REVISED DECEMBER 2008 Ultra-Wideband, > 40dB Gain Adjust Range, Linear in V/V VARIABLE GAIN AMPLIFIER FEATURES 1 DESCRIPTION • 710MHz SMALL-SIGNAL BANDWIDTH (G = +2V/V) • 320MHz, 4VPP BANDWIDTH (G = +10V/V) • 0.1dB GAIN FLATNESS to 135MHz • 2500V/µs SLEW RATE • > 40dB GAIN ADJUST RANGE • HIGH GAIN ACCURACY: 20dB ±0.3dB • HIGH OUTPUT CURRENT: ±90mA 23 The VCA824 is a dc-coupled, wideband, linear in V/V, continuously variable, voltage-controlled gain amplifier. It provides a differential input to single-ended conversion with a high-impedance gain control input used to vary the gain down 40dB from the nominal maximum gain set by the gain resistor (RG) and feedback resistor (RF). APPLICATIONS • • • • • DIFFERENTIAL LINE RECEIVERS DIFFERENTIAL EQUALIZERS PULSE AMPLITUDE COMPENSATION VARIABLE ATTENUATORS VOLTAGE-TUNABLE ACTIVE FILTERS VIN1 RF +VIN RG+ RS R1 RL FB RG VOUT VCA824 C1 CL RG- VIN2 -VIN 20W The VCA824 internal architecture consists of two input buffers and an output current feedback amplifier stage integrated with a multiplier core to provide a complete variable gain amplifier (VGA) system that does not require external buffering. The maximum gain is set externally with two resistors, providing flexibility in designs. The maximum gain is intended to be set between +2V/V and +40V/V. Operating from ±5V supplies, the gain control voltage for the VCA824 adjusts the gain linearly in V/V as the control voltage varies from +1V to –1V. For example, set for a maximum gain of +10V/V, the VCA824 provides 10V/V, at +1V input, to 0.1V/V at –1V input of gain control range. The VCA824 offers excellent gain linearity. For a 20dB maximum gain, and a gain-control input voltage varying between 0V and 1V, the gain does not deviate by more than ±0.3dB (maximum at +25°C). RS VCA824 RELATED PRODUCTS DUALS GAIN ADJUST RANGE (dB) Differential Equalizer SINGLES 9 INPUT NOISE (nV/√Hz) SIGNAL BANDWIDTH (MHz) VCA810 — 80 2.4 35 3 — VCA2612 45 1.25 80 0 — VCA2613 45 1 80 — VCA2615 52 0.8 50 — VCA2617 48 4.1 50 VCA820 — 40 8.2 150 -15 VCA821 — 40 6.0 420 -18 VCA822 — 40 8.2 150 VCA824 — 40 6.0 420 Equalized Frequency Response Gain (dB) 6 Initial Frequency Response of the VCA824 with RC Load -3 -6 -9 -12 -21 -24 1M 10M 100M 1G Frequency (Hz) Differential Equalization of an RC Load 1 2 3 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. X2Y is a registered trademark of X2Y Attenuators LLC. All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2007–2008, Texas Instruments Incorporated

ブランド

TI

会社名

Texas Instruments Incorporated

本社国名

U.S.A

事業概要

世界25ヶ国以上に製造・販売拠点を有する国際的な半導体企業であり、デジタル情報家電、ワイヤレス、ブロードバンド市場に欠かせないデジタル信号処理を行うDSPと、それに関連するアナログIC、マイクロコントローラを主力製品としている。

供給状況

 
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