- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄8628 > AD8307ANZ (Analog Devices Inc)IC LOGARITHMIC AMP 8-DIP PDF資料下載
參數(shù)資料
| 型號： | AD8307ANZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 11/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC LOGARITHMIC AMP 8-DIP |
| 標準包裝： | 50 |
| 類型： | 對數(shù)放大器 |
| 應用： | 接收器信號強度指示（RSSI） |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 8-DIP（0.300"，7.62mm） |
| 供應商設(shè)備封裝： | 8-PDIP |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 550 (CN2011-ZH PDF) |
AD8307
Rev. D | Page 19 of 24
SLOPE AND INTERCEPT ADJUSTMENTS
Where higher calibration accuracy is needed, the adjustments
shown in Figure 37 can be used, either singly or in combination.
The log slope is lowered to 20 mV/dB by shunting the nominally
12.5 kΩ on-chip load resistor (see Figure 31) with 50 kΩ, adjusted
by VR1. The calibration range is ±10% (18 mV/dB to 22 mV/dB),
including full allowance for the variability in the value of the
internal load. The adjustment can be made by alternately applying
two input levels, provided by an accurate signal generator, spaced
over the central portion of the log amp’s dynamic range, for
example, 60 dBm and 0 dBm. An AM modulated signal at the
center of the dynamic range can also be used. For a modulation
depth, M, expressed as a fraction, the decibel range between the
peaks and troughs over one cycle of the modulation period is
given by
M
dB
+
=
Δ
1
log
20
10
(7)
For example, using an rms signal level of 40 dBm with a 70%
modulation depth (M = 0.7), the decibel range is 15 dB, as the
signal varies from 47.5 dBm to 32.5 dBm.
The log intercept is adjustable over a ±3 dB range, which is
sufficient to absorb the worst-case intercept error in the AD8307,
plus some system level errors. For greater range, set RS to zero.
VR2 is adjusted while applying an accurately known CW signal
near the lower end of the dynamic range to minimize the effect
of any residual uncertainty in the slope. For example, to position
the intercept to 80 dBm, a test level of 65 dBm can be applied
and VR2 adjusted to produce a dc output of 15 dB above zero at
25 mV/dB, which is 0.3 V.
01
08
2-
0
37
C2 = CC
C1 = CC
20mV/dB
±10%
AD8307
INPUT
–75dBm TO
+16dBm
INP VPS ENB INT
INM COM OFS OUT
NC
NC = NO CONNECT
87
6
5
23
4
1
4.7
VR2
50k
RS
0.1F
VP, 2.7V TO 5.5V
AT ~8mA
±3dB
VR1
50k
32.4k
FOR VP = 3V, RS = 20k
VP = 5V, RS = 51k
Figure 37. Slope and Intercept Adjustments
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| VE-2T2-MW-B1 | CONVERTER MOD DC/DC 15V 100W |
| VE-2WH-IV-F4 | CONVERTER MOD DC/DC 52V 150W |
| 74AHC1G08GV,125 | IC 2-IN AND GATE SC74A-5 |
| SY88347DLEY | IC POST AMP PECL 3.2GBPS 10-MSOP |
| LTC1654IGN#PBF | IC D/A CONV 14BIT R-R DUAL16SSOP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8307AR | 功能描述:IC LOGARITHMIC AMP 92DB 8-SOIC RoHS:否 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:60 系列:- 類型:可變增益放大器 應用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤 供應商設(shè)備封裝:20-TQFN-EP（5x5） 包裝:托盤 |
| AD8307AR-REEL | 功能描述:IC LOGARITHMIC AMP 8-SOIC T/R RoHS:否 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:60 系列:- 類型:可變增益放大器 應用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤 供應商設(shè)備封裝:20-TQFN-EP（5x5） 包裝:托盤 |
| AD8307AR-REEL7 | 功能描述:IC LOGARITHMIC AMP 8-SOIC RoHS:否 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:60 系列:- 類型:可變增益放大器 應用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤 供應商設(shè)備封裝:20-TQFN-EP（5x5） 包裝:托盤 |
| AD8307ARZ | 功能描述:IC LOGARITHMIC AMP 92DB 8-SOIC RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:60 系列:- 類型:可變增益放大器 應用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤 供應商設(shè)備封裝:20-TQFN-EP（5x5） 包裝:托盤 |
| AD8307ARZ | 制造商:Analog Devices 功能描述:Logarithmic Amplifier IC |
發(fā)布緊急采購，3分鐘左右您將得到回復。