AD8310ARMZ datasheet(13/24 Pages) AD

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AD8310ARMZ Datasheet(PDF) 13 Page - Analog Devices

Part #	AD8310ARMZ

Description	Fast, Voltage-Out DC-440 MHz, 95 dB Logarithmic Amplifier

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Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

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13 / 24 page

AD8310

Rev. E | Page 13 of 24

For zero-signal conditions, all the detector output currents are

equal. For a finite input of either polarity, their difference is

converted by the output interface to a single-sided unipolar

current, nominally scaled 2 μA/dB (40 μA/decade), at the

output pin BFIN. An on-chip resistor of ~3 kΩ, R1, converts

this current to a voltage of 6 mV/dB. This is then amplified by a

factor of 4 in the output buffer, which can drive a current of up

to 25 mA in a grounded load resistor. The overall rise time of

the AD8310 is less than 15 ns. There is also a delay time of

about 6 ns when the log amp is driven by an RF burst, starting

at zero amplitude.

When driving capacitive loads, it is desirable to add a low value

of load resistor to speed up the return to the baseline; the buffer

is stable for loads of a least 100 pF. The output bandwidth can

be lowered by adding a grounded capacitor at BFIN. The time-

constant of the resulting single-pole filter is formed with the

3 kΩ internal load resistor (with a tolerance of 20%). Therefore,

to set the –3 dB frequency to 20 kHz, use a capacitor of 2.7 nF.

Using 2.7 μF, the filter corner is at 20 Hz.

Manufacturer	Part #	Datasheet	Description
Analog Devices	AD8310ARMZ-REEL1	606Kb / 24P	Fast, Voltage-Out DC-440 MHz, 95 dB Logarithmic Amplifier REV. D
Analog Devices	AD8310ARMZ-REEL71	606Kb / 24P	Fast, Voltage-Out DC-440 MHz, 95 dB Logarithmic Amplifier REV. D

Manufacturer	Part #	Datasheet	Description
Analog Devices	AD8310	606Kb / 24P	Fast, Voltage-Out DC-440 MHz, 95 dB Logarithmic Amplifier REV. D
	AD8310	393Kb / 24P	Fast, Voltage-Out, DC to 440 MHz, 95 dB Logarithmic Amplifier Rev. F
	AD8307	394Kb / 20P	Low Cost DC-500 MHz, 92 dB Logarithmic Amplifier REV. A
	AD8307	508Kb / 24P	Low Cost DC-500 MHz, 92 dB Logarithmic Amplifier REV. C
	AD8307	401Kb / 24P	Low Cost, DC to 500 MHz, 92 dB Logarithmic Amplifier Rev. D
	AD8309ARUZ	315Kb / 20P	5 MHz??00 MHz 100 dB Demodulating Logarithmic Amplifier REV. B
	AD640	240Kb / 16P	DC-Coupled Demodulating 120 MHz Logarithmic Amplifier REV. C
	AD640	278Kb / 16P	DC-Coupled Demodulating 120 MHz Logarithmic Amplifier REV. C
	AD640JPZ	240Kb / 16P	DC-Coupled Demodulating 120 MHz Logarithmic Amplifier REV. C
	AD640	417Kb / 19P	DC-Coupled Demodulating 120 MHz Logarithmic Amplifier

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