AD8309ARUZ Analog Devices Inc, AD8309ARUZ Datasheet
AD8309ARUZ
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AD8309ARUZ Summary of contents
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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 0.4 dB RSSI Linearity up to 200 MHz Programmable ...
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AD8309–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 50 500 MHz Bandwidth Input Resistance From INHI to INLO Input Capacitance ...
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ABSOLUTE MAXIMUM RATINGS* Supply Voltage 7 Input ...
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AD8309–Typical Performance Characteristics 100 10 1 +25 C 0.1 +85 C 0.01 0.001 0.0001 0.00001 0.5 0.7 0.9 1.1 1.3 1.5 1.7 ENABLE VOLTAGE – V Figure 1. Supply Current vs. Enable Voltage @ T = –40 C, +25 C ...
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– + –100 –80 –60 –40 –20 INPUT LEVEL – dBm Re 50 Figure 7. RSSI Output vs. Input Level, 100 ...
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AD8309 100 1 FREQUENCY – MHz Figure 13. RSSI Slope vs. Frequency Using Termination of 52.3 in Series with 4.7 nH 2ns PER HORIZONTAL DIVISION LIMITER OUTPUTS 100mV ...
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THEORY OF OPERATION The AD8309 is an advanced IF signal processing IC, intended for use in high performance receivers, combining two key func- tions. First, it provides a large voltage gain combined with pro- gressive compression, through which an IF ...
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AD8309 As a consequence of this high gain, even very small amounts of thermal noise at the input of a log amp will cause a finite output for zero input, resulting in the response line curving away from the ideal ...
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Figure 22. Below this input, the cascade of gain cells is acting as a simple linear amplifier, while for higher values enters into a series of segments which lie on a logarith- IN mic ...
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... Intercept Calibration Monolithic log amps from Analog Devices incorporate accurate means to position the intercept voltage V wave power for a demodulating log amp, when driven at a spe- cific impedance level). Using the scheme shown in Figure 24, the value of the intercept level departs considerably from that predicted by the simple theory ...
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The total dynamic range of the AD8309, defined as the ratio of the maximum permissible input to the noise floor, is thus 100 dB. Good accuracy is provided over a substantial part of this range. Input Matching Monolithic log amps ...
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AD8309 A fully-programmable output interface is provided for the hard- limited signal, permitting the user to establish the optimal output current from its differential current-mode output. Its magnitude is determined by the resistor R placed between LMDR (Pin LIM 9) ...
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Because of the very high gain bandwidth product of this ampli- fier considerable care must be exercised in using the limiter outputs. The minimum necessary bias current and voltage swings should be used. These outputs are best utilized in a ...
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AD8309 load current, which may be large, the value of R2 should take this into account. The four pins labeled PADL tie down directly to the metallic lead frame, and are thus connected to the back of the chip. The ...
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Second, the component count is low: two capacitors and an inexpensive chip inductor are needed. Third, the net- work also serves as a balun. Analysis of this network shows that ...
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AD8309 Slope and Intercept Adjustment The AD8309 provides limited opportunities for adjustment of its basic scaling parameters, which are controlled to within tight limits through robust design. In applications involving the ob- servation of measured signal levels on a DVM ...
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AD8309 SUPPLY DROPPED INPUT 0.1 F Figure 37. Buffered RSSI Output with Slope and Intercept Adjustments Table II. Slope Intercept mV/dB dBV –102 3.92 8.87 O ...
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AD8309 Modulated Limiter Output The limiter output stage of the AD8309 also provides an analog multiplication capability: the amplitude of the output square wave can be controlled by the current withdrawn from LMDR (Pin 9). An analog control input of ...
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Component Function SW1 Device Enable. When in position A, the ENBL pin is connected to +V AD8309 is in normal operating mode. In position B, the ENBL pin is connected to an SMA connector labeled Ext Enable. An applied signal ...
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AD8309 Figure 43. Signal Layer Silkscreen OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 16-Lead TSSOP (RU-16) 0.201 (5.10) 0.193 (4.90 PIN 1 0.006 (0.15) 0.0433 0.002 (0.05) (1.10) MAX 8° 0.0256 0.0118 (0.30) 0° SEATING ...