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參數(shù)資料
| 型號(hào)： | AD8367 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 500 MHz, Linear-in-dB VGA with AGC Detector |
| 中文描述： | 500兆赫，線性以dB顯卡帶AGC檢測(cè) |
| 文件頁(yè)數(shù)： | 1/16頁(yè) |
| 文件大小： | 607K |
| 代理商： | AD8367 |
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Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
a
AD8367
Tel: 781/329-4700Fax: 781/326-8703
Analog Devices, Inc., 2001500 MHz, Linear-in-dB VGA
with AGC Detector
FUNCTIONAL BLOCK DIAGRAM
GAUSSIAN INTERPOLATOR
AD8367
VPSO
VPSI
HPFL
ICOM
DECL
VOUT
ENBL
OCOM
DETO
GAIN
MODE
INPT
ICOM
ICOM
SQUARE
LAW
DETECTOR
g
m
CELLS
9-STAGE ATTENUATOR BY 5dB
BIAS
FEATURES
Broad Range Analog Variable Gain
–2.5 dB to +42.5 dB
3 dB Cutoff Frequency of 500 MHz
Gain Up and Gain Down Modes
Linear-in-dB, Scaled 20 mV/dB
Resistive Ground Referenced Input
Nominal Z
IN
200
On-Chip Square-Law Detector
Single-Supply Operation: 2.7 V to 5.5 V
APPLICATIONS
Cellular Base Station
Broadband Access
Power Amplifier Control Loops
Complete, Linear IF AGC Amplifiers
High-Speed Data I/O
GENERAL DESCRIPTION
The AD8367 is a high-performance 45 dB variable gain ampli-
fier with linear-in-dB gain control for use from low frequencies
up to several hundred megahertz. The range, flatness, and accu-
racy of the gain response are achieved using Analog Devices
’
X-AMP
architecture, the most recent in a series of powerful
proprietary concepts for variable gain applications, which far
surpasses what can be achieved using competing techniques.
The input is applied to a 200
resistive ladder network, having
nine sections each of 5 dB loss, for a total attenuation of 45 dB.
At maximum gain, the first tap is selected; at progressively lower
gains, the tap moves smoothly and continuously toward higher
attenuation values. The attenuator is followed by a 42.5 dB
fixed gain feedback amplifier
—
essentially an operational ampli-
fier with a gain bandwidth product of 100 GHz
—
and is very
linear, even at high frequencies. The output third order intercept is
+20 dBV at 100 MHz (+27 dBm re 200
), measured at an
output level of 1 V p-p with V
S
= 5 V.
The analog gain-control interface is very simple to use. It is
scaled at 20 mV/dB, and the control voltage, V
GAIN
, runs from
50 mV at
–
2.5 dB to 950 mV at +42.5 dB. In the inverse-gain
mode of operation, selected by a simple pin-strap, the gain
decreases from +42.5 dB at V
GAIN
= 50 mV to
–
2.5 dB at
V
GAIN
= 950 mV. This inverse mode is needed in AGC applications,
which are supported by the integrated square-law detector,
whose set point is chosen to level the output to 354 mV rms,
regardless of the waveshape. A single external capacitor sets up
the loop averaging time.
The AD8367 may be powered on or off by a voltage applied to
the ENBL pin. When this voltage is at a logic LO, the total power
dissipation drops to the milliwatt range. For a logic HI, the chip
powers-up rapidly to its normal quiescent current of 26 mA at
25
°
C. The AD8367 is available in a 14-lead TSSOP package for
the industrial temperature range of
–
40
°
C to +85
°
C.
X-AMP is a registered trademark of Analog Devices, Inc.
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| AD8367ARU | 500 MHz, Linear-in-dB VGA with AGC Detector |
| AD8369 | 45 dB Digitally Controlled VGA LF to 600 MHz |
| AD8369ARU | 45 dB Digitally Controlled VGA LF to 600 MHz |
| AD8369ARU-REEL7 | 45 dB Digitally Controlled VGA LF to 600 MHz |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8367_05 | 制造商:AD 制造商全稱:Analog Devices 功能描述:500 MHz, Linear-in-dB VGA with AGC Detector |
| AD8367ARU | 功能描述:IC AMP VGA 14TSSOP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 標(biāo)準(zhǔn)包裝:2,500 系列:Excalibur™ 放大器類型:J-FET 電路數(shù):1 輸出類型:- 轉(zhuǎn)換速率:45 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:20pA 電壓 - 輸入偏移:490µV 電流 - 電源:1.7mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SOIC 包裝:帶卷 (TR) |
| AD8367ARU-REEL | 制造商:Analog Devices 功能描述: |
| AD8367ARU-REEL7 | 功能描述:IC AMP VGA 14TSSOP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 標(biāo)準(zhǔn)包裝:150 系列:- 放大器類型:音頻 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:5 V/µs 增益帶寬積:12MHz -3db帶寬:- 電流 - 輸入偏壓:100nA 電壓 - 輸入偏移:500µV 電流 - 電源:6mA 電流 - 輸出 / 通道:50mA 電壓 - 電源，單路/雙路(±):4 V ~ 32 V，±2 V ~ 16 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:8-TSSOP 包裝:管件 |
| AD8367ARU-REEL-7 | 制造商:AD 制造商全稱:Analog Devices 功能描述:500 MHz, Linear-in-dB VGA with AGC Detector |
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