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參數(shù)資料
| 型號(hào)： | AD8310ARMZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 5/24頁(yè) |
| 文件大小： | 0K |
| 描述： | IC AMP LOGARITHMIC 8MSOP |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 類(lèi)型： | 對(duì)數(shù)放大器 |
| 應(yīng)用： | 接收器信號(hào)強(qiáng)度指示（RSSI） |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-MSOP |
| 包裝： | 帶卷 (TR) |
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AD8310
Rev. F | 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.
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