AD8306AR Analog Devices Inc, AD8306AR Datasheet

no-image

AD8306AR

Manufacturer Part Number
AD8306AR
Description
Logarithmic Amplifier IC
Manufacturer
Analog Devices Inc
Type
Limiting-Logarithmic Amplifierr
Datasheet

Specifications of AD8306AR

No. Of Amplifiers
1
No. Of Pins
16
Peak Reflow Compatible (260 C)
No
Bandwidth
400MHz
Leaded Process Compatible
No
Mounting Type
Surface Mount
Package / Case
16-SOIC
Rohs Status
RoHS non-compliant
Applications
Receiver Signal Strength Indication (RSSI)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD8306AR
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
AD8306ARZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
a
PRODUCT DESCRIPTION
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 A.
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 k in
parallel with 2.5 pF). The input-referred noise-spectral-density,
when driven from a terminated 50 , 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.
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.
REV. A
FEATURES
Complete, Fully Calibrated Log-Limiting IF Amplifier
100 dB Dynamic Range: –91 dBV to +9 dBV
Stable RSSI Scaling Over Temperature and Supplies:
Programmable Limiter Gain and Output Current
Single Supply of +2.7 V to +6.5 V at 16 mA Typical
Fully Differential Inputs, R
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
20 mV/dB Slope, –95 dBm Intercept
Differential Outputs to 10 mA, 2.4 V p-p
Overall Gain 90 dB, Bandwidth 400 MHz
Constant Phase (Typical
0.4 dB RSSI Linearity up to 200 MHz
IN
= 1 k , C
56 ps Delay Skew)
IN
= 2.5 pF
5 MHz–400 MHz 100 dB High Precision
INLO
INHI
The overall dynamic range for this combination extends from
–91 dBV (–78 dBm at the 50
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 .
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 ). 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
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
ENBL
Limiting-Logarithmic Amplifier
LADR ATTEN
4
DET
GAIN
BIAS
FUNCTIONAL BLOCK DIAGRAM
12dB
TEN DETECTORS SPACED 12dB
SIX STAGES TOTAL GAIN 72dB
DET
World Wide Web Site: http://www.analog.com
REFERENCE
BAND-GAP
12dB
DET
level) to a maximum permissible
SLOPE
BIAS
© Analog Devices, Inc., 1999
12dB
AD8306
DET
TYP GAIN 18dB
TEMP COMP
INTERCEPT
LIM
I–V
CTRL
BIAS
and
LMHI
LMLO
LMDR
VLOG
FLTR

Related parts for AD8306AR

AD8306AR Summary of contents

Page 1

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 ...

Page 2

AD8306–SPECIFICATIONS Parameter Conditions INPUT STAGE (Inputs INHI, INLO) 2 Maximum Input Differential Drive, p-p Equivalent Power in 50 Terminated in 52.3 Noise Floor Terminated 50 Equivalent Power in 50 400 MHz Bandwidth Input Resistance From INHI to INLO Input Capacitance ...

Page 3

... Maximum Junction Temperature . . . . . . . . . . . . . . . . +125 C Operating Temperature Range . . . . . . . . . . . . – +85 C Temperature Model Range AD8306AR – +85 C AD8306AR-REEL – +85 C AD8306AR-REEL7 – +85 C AD8306ACHIPS – +85 C 5962-9864601QEA – +125 C AD8306-EVAL CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. ...

Page 4

AD8306 –Typical Performance Characteristics 100 + 0 + 0.01 0.001 0.0001 0.00001 0.5 0.7 0.9 1.1 1.3 1.5 ENABLE VOLTAGE – V Figure 1. Supply Current vs. Enable Voltage @ ...

Page 5

– + –120 –100 –80 –60 –40 (–87dBm) INPUT LEVEL – dBV Figure 7. RSSI Output vs. Input Level, 100 MHz ...

Page 6

AD8306 100 200 FREQUENCY – MHz Figure 13. RSSI Slope vs. Frequency Using Termination of 52.3 0.4 0.375 0.35 0.325 0.3 0.275 0. 100 150 200 250 FREQUENCY – MHz Figure 14. ...

Page 7

PRODUCT OVERVIEW The AD8306 is built on an advanced dielectrically-isolated complementary bipolar process using thin-film resistor technol- ogy for accurate scaling. It follows well-developed foundations proven over a period of some fifteen years, with constant refine- ment. The backbone of ...

Page 8

AD8306 voltage sensitivity. Most interfaces have additional small junc- tion capacitances associated with them, due to active devices or ESD protection; these may be neither accurate nor stable. Component numbering in each of these interface diagrams is local. Enable Interface ...

Page 9

RSSI output voltage for zero input, and to provide temperature compensation, resulting in a stable intercept. For zero signal conditions, all the detector output currents are equal. For a finite input, of ...

Page 10

AD8306 low frequency applications, a simple RC network forming a low- pass filter should be added at the input for the same reason. If the limiter output is not required, Pin 9 (LMDR) should be left open and Pins 12 ...

Page 11

COM2 VLOG 0 VPS1 VPS2 C1 3 PADL PADL 0.01 F AD8306 4 INHI LMHI SIGNAL R T INPUTS 52.3 5 INLO LMLO C2 6 0.01 F PADL PADL 7 COM1 FLTR ENBL 8 LMDR ...

Page 12

AD8306 Table I. Match to 50 (Gain = 13 dB MHz 140 3500 10.7 133 3200 15 95.0 2250 20 71.0 1660 21.4 66.5 1550 25 57.0 1310 30 47.5 1070 ...

Page 13

The AD8031 rail-to-rail op amp, used in both ex- amples, can swing from 4. single +5 V supply. If high output current is required (> 10 mA), the AD8051, which also has ...

Page 14

AD8306 0 SIG 0.01 F INHI R10 52.3 SIG C2 INLO R1 0. EXT ENABLE Component Function SW1 Device Enable. When in Position A, the ENBL pin is connected to +V ...

Page 15

Figure 34. Layout of Signal Layer Figure 35. Layout of Power Layer REV. A Figure 36. Signal Layer Silkscreen Figure 37. Power Layer Silkscreen –15– AD8306 ...

Page 16

AD8306 0.1574 (4.00) 0.1497 (3.80) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 16-Lead Narrow Body SO (SO-16) 0.3937 (10.00) 0.3859 (9.80 0.2440 (6.20) 0.2284 (5.80 PIN 1 0.0688 (1.75) 0.050 (1.27) BSC 0.0532 (1.35) 0.0098 ...

Related keywords