AD8309ARU

更新时间： 2024-11-23 22:49:59

品牌	Logo	应用领域
亚德诺 - ADI		模拟计算功能信号电路放大器光电二极管
页数	文件大小	规格书
20页	314K
描述
5 MHz.500 MHz 100 dB Demodulating Logarithmic Amplifier with Limiter Output

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AD8309ARU 数据手册

5 MHz–500 MHz 100 dB Demodulating

Logarithmic Amplifier with Limiter Output

AD8309

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Complete Multistage Log-Limiting IF Amplifier

100 dB Dynamic Range: –78 dBm to +22 dBm (Re 50 ⍀)

Stable RSSI Scaling Over Temperature and Supplies:

20 mV/dB Slope, –95 dBm Intercept

SIX STAGES TOTAL GAIN 72dB

TYP GAIN 18dB

INHI

LMHI

12dB

LIM

INLO

LMLO

؎0.4 dB RSSI Linearity up to 200 MHz

Programmable Limiter Gain and Output Current

Differential Outputs to 10 mA, 2.4 V p-p

BIAS

CTRL

LADR ATTEN

LMDR

DET

I-V

VLOG

FLTR

Overall Gain 100 dB, Bandwidth 500 MHz

TEN DETECTORS SPACED 12dB

Constant Phase (Typical ؎80 ps Delay Skew)

Single Supply of +2.7 V to +6.5 V at 16 mA Typical

Fully Differential Inputs, R_IN= 1 k⍀, C_IN= 2.5 pF

500 ns Power-Up Time, <1 ␮A Sleep Current

GAIN

BIAS

BAND-GAP

SLOPE

BIAS

INTERCEPT

TEMP COMP

ENBL

REFERENCE

APPLICATIONS

Receivers for Frequency and Phase Modulation

Very Wide Range IF and RF Power Measurement

Receiver Signal Strength Indication (RSSI)

Low Cost Radar and Sonar Signal Processing

Instrumentation: Network and Spectrum Analyzers

PRODUCT DESCRIPTION

The overall dynamic range for this combination extends from

–91 dBV (–78 dBm at the 50 Ω level) to a maximum permissible

value of +9 dBV, using a balanced drive of antiphase inputs each

of 2 V in amplitude, which would correspond to a sine wave

power of +22 dBm if the differential input were terminated in

50 Ω. The slope of the RSSI output is closely controlled to

20 mV/dB, while the intercept is set to –108 dBV (–95 dBm

re 50 Ω). These scaling parameters are determined by a band-

gap voltage reference and are substantially independent of tem-

perature and supply. The logarithmic law conformance is typically

within ±0.4 dB over the central 80 dB of this range at any fre-

quency between 10 MHz and 200 MHz, and is degraded only

slightly at 500 MHz.

The AD8309 is a complete IF limiting amplifier, providing both

an accurate logarithmic (decibel) measure of the input signal

(the RSSI function) over a dynamic range of 100 dB, and a

programmable limiter output, useful from 5 MHz to 500 MHz.

It is easy to use, requiring few external components. A single

supply voltage of +2.7 V to +6.5 V at 16 mA is needed, corre-

sponding to a power consumption of under 50 mW at 3 V, plus

the limiter bias current, determined by the application and

typically 2 mA, providing a limiter gain of 100 dB when using

200 Ω loads. A CMOS-compatible control interface can enable

the AD8309 within about 500 ns and disable it to a standby

current of under 1 µA.

The RSSI response time is nominally 67 ns (10%–90%). The

averaging time may be increased without limit by the addition of

an external capacitor. The full output of 2.34 V at the maximum

input of +9 dBV can drive any resistive load down to 50 Ω and

this interface remains stable with any value of capacitance on

the output.

The six cascaded amplifier/limiter cells in the main path have a

small signal gain of 12.04 dB (×4), with a –3 dB bandwidth of

850 MHz, providing a total gain of 72 dB. The programmable

output stage provides a further 18 dB of gain. The input is fully

differential and presents a moderately high impedance (1 kΩ in

parallel with 2.5 pF). The input-referred noise-spectral-density,

when driven from a terminated 50 Ω, source is 1.28 nV/√Hz,

equivalent to a noise figure of 3 dB. The sensitivity of the

AD8309 can be raised by using an input matching network.

The AD8309 is fabricated on an advanced complementary

bipolar process using silicon-on-insulator isolation techniques

and is available in the industrial temperature range of –40°C to

+85°C, in a 16-lead TSSOP package.

Each of the main gain cells includes a full-wave detector. An

additional four detectors, driven by a broadband attenuator, are

used to extend the top end of the dynamic range by over 48 dB.

REV. B

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

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AD8309ARU 替代型号

型号	品牌	替代类型	描述	数据表
AD8309ARUZ-REEL7	ADI	类似代替	5 MHz TO 500 MHz, 100 dB Demodulating Logarithmic Amplifier with Limiter Output
AD8309ARUZ	ADI	类似代替	5 MHzâ500 MHz 100 dB Demodulating Logarithm
AD8309ARU-REEL7	ADI	类似代替	5 MHz.500 MHz 100 dB Demodulating Logarithmic Amplifier with Limiter Output

与AD8309ARU相关器件

型号	品牌	获取价格	描述	数据表
AD8309ARU-REEL	ADI	获取价格	5 MHz.500 MHz 100 dB Demodulating Logarithmic Amplifier with Limiter Output
AD8309ARU-REEL7	ADI	获取价格	5 MHz.500 MHz 100 dB Demodulating Logarithmic Amplifier with Limiter Output
AD8309ARUZ	ADI	获取价格	5 MHzâ500 MHz 100 dB Demodulating Logarithm
AD8309ARUZ-REEL7	ADI	获取价格	5 MHz TO 500 MHz, 100 dB Demodulating Logarithmic Amplifier with Limiter Output
AD8309-EVAL	ADI	获取价格	5 MHz.500 MHz 100 dB Demodulating Logarithmic Amplifier with Limiter Output
AD830AN	ADI	获取价格	High Speed, Video Difference Amplifier
AD830ANZ	ADI	获取价格	High Speed, Video Difference Amplifier
AD830ANZ	ROCHESTER	获取价格	1 CHANNEL, VIDEO AMPLIFIER, PDIP8, ROHS COMPLIANT, PLASTIC, MS-001, DIP-8
AD830AR	ADI	获取价格	High Speed, Video Difference Amplifier
AD830AR	ROCHESTER	获取价格	1 CHANNEL, VIDEO AMPLIFIER, PDSO8, MS-012AA, SOIC-8

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