参数资料
| 型号： | AD8307ARZ-RL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 5/24页 |
| 文件大小： | 0K |
| 描述： | IC AMP LOGARITHMIC 8-SOIC |
| 标准包装： | 1 |
| 类型： | 对数放大器 |
| 应用： | 接收器信号强度指示（RSSI） |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 标准包装 |
| 其它名称： | AD8307ARZ-RL7DKR |
AD8307
Rev. D | Page 13 of 24
In the AD8307, this is achieved by an on-chip filter, providing
sufficient suppression of HF feedback to allow operation above
1 MHz. To extend the range below this frequency, an external
capacitor can be added. This permits the high-pass corner to be
lowered to audio frequencies using a capacitor of modest value.
Note that this capacitor has no effect on the minimum signal
frequency for input levels above the offset voltage; this extends
down to dc (for a signal applied directly to the input pins). The
offset voltage varies from part to part; some exhibit essentially
stable offsets of under 100 μV without the benefit of an offset
adjustment.
EXTENSION OF RANGE
The theoretical dynamic range for the basic log amp shown in
86 dB. The actual lower end of the dynamic range is largely
determined by the thermal noise floor, measured at the input of
the chain of amplifiers. The upper end of the range is extended
upward by the addition of top-end detectors. The input signal is
applied to a tapped attenuator, and progressively smaller signals
are applied to three passive rectifying gm cells whose outputs are
summed with those of the main detectors. With care in design,
the extension to the dynamic range can be seamless over the full
frequency range. For the AD8307, it amounts to a further 27 dB.
Therefore, the total dynamic range is theoretically 113 dB.
The specified range of 90 dB (74 dBm to +16 dBm) is for high
accuracy and calibrated operation, and includes the low end
degradation due to thermal noise and the top end reduction due
to voltage limitations. The additional stages are not redundant, but
are needed to maintain accurate logarithmic conformance over
the central region of the dynamic range, and in extending the
usable range considerably beyond the specified range. In
applications where log conformance is less demanding, the
AD8307 can provide over 95 dB of range.
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相关代理商/技术参数 |
参数描述 |
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| AD8307-EB | 制造商:Analog Devices 功能描述:AD8307 EVALUATION BOARD - Bulk |
| AD8309 | 制造商:AD 制造商全称:Analog Devices 功能描述:5 MHz.500 MHz 100 dB Demodulating Logarithmic Amplifier with Limiter Output |
| AD8309ARU | 功能描述:IC LOGARITHM AMP 100DB 16-TSSOP RoHS:否 类别:集成电路 (IC) >> 线性 - 放大器 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:60 系列:- 类型:可变增益放大器 应用:CATV 安装类型:表面贴装 封装/外壳:20-WQFN 裸露焊盘 供应商设备封装:20-TQFN-EP（5x5） 包装:托盘 |
| AD8309ARU-REEL | 制造商:Analog Devices 功能描述: |
| AD8309ARU-REEL7 | 功能描述:IC LOG AMP DEMODULATING 16-TSSOP RoHS:否 类别:集成电路 (IC) >> 线性 - 放大器 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:60 系列:- 类型:可变增益放大器 应用:CATV 安装类型:表面贴装 封装/外壳:20-WQFN 裸露焊盘 供应商设备封装:20-TQFN-EP（5x5） 包装:托盘 |
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