EEWORLDEEWORLDEEWORLD

Part Number

Search

AD8306ACHIPS

Description
5 mhz-400 mhz 100 dB high precision limiting-logarithmic amplifier
File Size398KB,16 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Compare View All

AD8306ACHIPS Overview

5 mhz-400 mhz 100 dB high precision limiting-logarithmic amplifier

a
5 MHz–400 MHz 100 dB High Precision
Limiting-Logarithmic Amplifier
AD8306
FUNCTIONAL BLOCK DIAGRAM
SIX STAGES TOTAL GAIN 72dB
INHI
12dB
INLO
LADR ATTEN
4 DET
BIAS
CTRL
I–V
TEN DETECTORS SPACED 12dB
12dB
12dB
LIM
LMLO
LMDR
TYP GAIN 18dB
LMHI
FEATURES
Complete, Fully Calibrated Log-Limiting IF Amplifier
100 dB Dynamic Range: –91 dBV to +9 dBV
Stable RSSI Scaling Over Temperature and Supplies:
20 mV/dB Slope, –95 dBm Intercept
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
Overall Gain 90 dB, Bandwidth 400 MHz
Constant Phase (Typical 56 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
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
DET
DET
DET
VLOG
FLTR
ENBL
GAIN
BIAS
BAND-GAP
REFERENCE
SLOPE
BIAS
INTERCEPT
TEMP COMP
The AD8306 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 400 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 typi-
cally 2 mA, providing a limiter gain of 90 dB when using 200
loads. A CMOS-compatible control interface can enable the
AD8306 within about 500 ns and disable it to a standby current
of under 1
µA.
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
AD8306 can be raised by using an input matching network.
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.
The overall dynamic range for this combination extends from
–91 dBV (–78 dBm at the 50
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.
Through laser trimming, 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 indepen-
dent of temperature and supply. The logarithmic law conform-
ance is typically within
±
0.4 dB over the central 80 dB of this
range at any frequency between 10 MHz and 200 MHz, and is
degraded only slightly at 400 MHz.
The RSSI response time is nominally 73 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
and
this interface remains stable with any value of capacitance on
the output.
The AD8306 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 narrow body SO package. The AD8306 is
also available for the full military temperature range of –55°C to
+125°C, in a 16-lead side-brazed ceramic DIP.
REV. A
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
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1999

AD8306ACHIPS Related Products

AD8306ACHIPS AD8306 AD8306-EVAL
Description 5 mhz-400 mhz 100 dB high precision limiting-logarithmic amplifier 5 mhz-400 mhz 100 dB high precision limiting-logarithmic amplifier 5 mhz-400 mhz 100 dB high precision limiting-logarithmic amplifier
About the storage of XDATA type variables
Hello everyone, the variables are defined as follows: char xdata ziku[] = {...} _at_ 0x0020; unsigned xdata int shuzu[] = {...}; unsigned xdata long ack; I would like to ask: Will the two xdata type v...
hy777 MCU
2812 How to connect sci to pc, please help! !
//########################################################################### // // FILE:Example_281xSci_FFDLB.c // // TITLE: DSP281x Device SCI FIFO Digital Loop Back Test.// // ASSUMPTIONS: // //Thi...
ygwilliam Microcontroller MCU
EEWORLD University ----TI EV/HEV 48V and Motor Drive Solutions
TI EV/HEV 48V and Motor Drive Solutions : https://training.eeworld.com.cn/course/5128...
hi5 Talking
Is it necessary to learn TI's M4?
It seems that all the books sold in bookstores are about STM32. Is anyone using TI M4? Is it difficult to find a job after learning this?...
minjiang Microcontroller MCU
【MXCHIP Open1081】+UART communication
Serial communication, example UART. After loading the example, you need to change the compilation path of KEIL to your own installation path of KEIL: 180675 Mine is on the D drive, change it to D:\Pro...
billjing RF/Wirelessly
What are TI's classic power chips?
I am a humble man, just getting started with power supplies, and would like to know what classic power chips TI has....
hangsky Analogue and Mixed Signal

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 2420  1901  1115  2676  2877  49  39  23  54  58 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号