AD8310 Analog Devices, AD8310 Datasheet
AD8310
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AD8310 Summary of contents
Page 1
... The logarithmic linearity is typically within 0 100 MHz over the central portion of the range, but is somewhat greater at 440 MHz. There is no minimum frequency limit; the AD8310 may be used down to low audio frequencies. Special filtering features are provided to support this wide range. ...
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... AD8310–SPECIFICATIONS Parameter Conditions INPUT STAGE (Inputs INHI, INLO) 1 Maximum Input Single-Ended, p-p Equivalent Power in 50 Termination Resistor of 52.3 Differential Drive, p-p Noise Floor Terminated 50 Equivalent Power in 50 440 MHz Bandwidth Input Resistance From INHI to INLO Input Capacitance From INHI to INLO DC Bias Voltage Either Input ...
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... 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. Although the AD8310 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...
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... Performance Characteristics AD8310 100 + 0 0.001 0.0001 T = – 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 and + OUT –3dBV 500mV PER –23dBV VERTICAL DIVISION –43dBV –63dBV –83dBV 5V PER ENABLE VERTICAL ...
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... Figure 12. Log Linearity of RSSI Output vs. Input Level, 100 MHz Sine Input at T –5– AD8310 50MHz 10MHz 100MHz –100 –80 –60 –40 –20 0 (–87dBm) (+13dBm) INPUT LEVEL – dBV = 25 C for A ...
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... AD8310 –1 –2 –3 –4 –5 –120 –100 –80 –60 –40 (–87dBm) INPUT LEVEL – dBV Figure 13. Log Linearity of RSSI Output vs. Input Level for Frequencies of 10 MHz, 50 MHz and A 100 MHz –1 –2 300MHz – ...
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... The AD8310 employs six cells in its main signal path each having a small-signal gain of 14 5.2) and a –3 dB band- width of about 900 MHz; the overall gain is about 20,000 (86 dB) ...
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... A when ENBL is taken under worst-case conditions. For voltages below 1 V, the AD8310 will be disabled, and consume a sleep current of under 1 A; tied to the supply voltage above will be fully enabled. The internal bias circuitry is very fast (typically < ...
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... REV. A Occasionally, it may be desirable to use the dc-coupled potential AD8310 of the AD8310, in baseband applications. The main challenge here is to present the signal at the elevated common-mode input TO BIAS level, which may require the use of low-noise, low-offset buffer STAGES amplifi ...
Page 10
... The overall rise-time of the AD8310 is under 15 ns; there is also a delay time of about 6 ns when the log amp is driven burst, starting at zero amplitude. When driving capacitive loads desirable to add a low value of load resistor to speed up the return to the baseline ...
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... C4 change in the RSSI output voltage for change at the input. 0.01 F For the AD8310, slope is nominally 24 mV/dB. Therefore change at the input results in a change at the output of approxi- mately 240 mV. The plot of Log-Conformance shows the range over which the device maintains its constant slope. The dynamic range of the log amp is defi ...
Page 12
... To measure the rms power of a square wave, for example, the mV equivalent of the dB value given in the table (24 mV/dB times 3.01 dB) should be subtracted from the output voltage of the AD8310. Table I. Correction for Signals with Differing Crest Factors Correction Factor (Add to Measured Input ...
Page 13
... A common example of this is the need to “map” the ) O output swing of the AD8310 into the input range of an analog- to com- to-digital converter (ADC) with a rail-to-rail input swing. M Alternatively, a situation might arise, when only a part of the total dynamic range is required— ...
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... OUT Figure 34. Lowering the High-Pass Corner Frequency of the Offset Control Loop APPLICATIONS The AD8310 is highly versatile and easy to use. Being complete the BFIN FILT it needs only a few external components, and most can be immediately accommodated by using the simple connections shown in the preceding section. A few examples of more special- ized applications are provided here ...
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... After trimming, the lower end of the dynamic range is limited by the broadband noise at the output of the AD8138, which is approximately 425 V p-p. A differential low-pass filter may be added between the AD8138 and the AD8310 when the very fast pulse response of the circuit is not required. 2.7 2 ...
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... C1, C2, R2, R3 Input Interface: R3 (52.3 ) combines with the AD8310’ input impedance to give an overall broadband input impedance C1, C2, and the AD8310’s input impedance combine to set a high-pass input corner of 32 kHz. Alternatively, R3, C1, and C2 can be replaced by an inductor and matching capacitors to form an input matching network ...