参数资料
| 型号： | AD8132ARMZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 24/33页 |
| 文件大小： | 0K |
| 描述： | IC AMP DIFF LDIST LP 70MA 8MSOP |
| 标准包装： | 50 |
| 放大器类型： | 差分 |
| 电路数： | 1 |
| 输出类型： | 差分 |
| 转换速率： | 1200 V/µs |
| -3db带宽： | 360MHz |
| 电流 - 输入偏压： | 3µA |
| 电压 - 输入偏移： | 1000µV |
| 电流 - 电源： | 12mA |
| 电流 - 输出 / 通道： | 70mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 11 V，±1.35 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 管件 |
| 产品目录页面： | 770 (CN2011-ZH PDF) |
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AD8132
Rev. I | Page 29 of 32
FULL-WAVE RECTIFIER
If there is not enough forward bias (VOUT, cm too low), the lower
sharp cusps of the full-wave rectified output waveform are rounded
off. In addition, as the frequency increases, there tends to be some
rounding of the lower cusps. The forward bias can be increased
to yield sharper cusps at higher frequencies.
The balanced outputs of the AD8132, along with a couple of
Schottky diodes, can create a very high speed, full-wave rectifier.
Such circuits are useful for measuring ac voltages and other
computational tasks.
There is not a reliable, entirely quantifiable, means to measure
the performance of a full-wave rectifier. Because the ideal
waveform has periodic sharp discontinuities, it has (mostly
even) harmonics that have no upper bound on the frequency.
However, for a practical circuit, as the frequency increases, the
higher harmonics become attenuated and the sharp cusps that
are present at low frequencies become significantly rounded.
Figure 82 shows the configuration of such a circuit. Each of the
AD8132 outputs drives the anode of an HP2835 Schottky diode.
These Schottky diodes were chosen for their high speed operation.
At lower frequencies (approximately lower than 10 MHz), a silicon
signal diode, such as a 1N4148, can be used. The cathodes of the
two diodes are connected together, and this output node is
connected to ground by a 100 Ω resistor.
RG1
348
RF1
348
RF2
348
RG2
348
+5V
–5V
RL
100
RT2
24.9
RT1
49.9
VIN
HP2835
VOUT
+5V
CR1
10k
01
03
5-
08
0
When running the circuit at a frequency up to 300 MHz, though it
stays functional, the major harmonic that remains in the output
is the second. This looks like a sine wave at 600 MHz. Figure 83 is
an oscilloscope plot of the output when driven by a 100 MHz,
2.5 V p-p input.
Sometimes a second harmonic generator is useful for creating a
clock to oversample a DAC by a factor of two. If the output of
this circuit is run through a low-pass filter, it can be used as a
second harmonic generator.
Figure 82. Full-Wave Rectifier
100mV
2ns
1V
01
03
5-
0
81
Operate the diodes such that they are slightly forward-biased
when the differential output voltage is zero. For the Schottky
diodes, this is approximately 400 mV. The forward biasing is
conveniently adjusted by CR1, which, in this circuit, raises and
lowers VOUT, cm without creating a differential output voltage.
One advantage of this circuit is that the feedback loop is never
momentarily opened while the diodes reverse their polarity within
the loop. This scheme is sometimes used for full-wave rectifiers
that use conventional op amps. These conventional circuits do
not work well at frequencies above approximately 1 MHz.
Figure 83. Full-Wave Rectifier Response with 100 MHz Input
AUTOMOTIVE PRODUCTS
The AD8132W is qualified per the AEC-Q100 for use in
automotive applications. Custom variants of this product may
be available to meet stringent automotive performance and
quality requirements.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8132ARMZ | 制造商:Analog Devices 功能描述:IC - Differential Amplifier 制造商:Analog Devices 功能描述:IC, DIFF AMP, 350MHZ, 1200V/ uS, MSOP-8 |
| AD8132ARMZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:Low Cost, High Speed Differential Amplifier |
| AD8132ARMZ-REEL | 功能描述:IC AMP DIFF LDIST LP 70MA 8MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:通用 电路数:2 输出类型:满摆幅 转换速率:1.8 V/µs 增益带宽积:6.5MHz -3db带宽:4.5MHz 电流 - 输入偏压:5nA 电压 - 输入偏移:100µV 电流 - 电源:65µA 电流 - 输出 / 通道:35mA 电压 - 电源，单路/双路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| AD8132ARMZ-REEL1 | 制造商:AD 制造商全称:Analog Devices 功能描述:Low Cost, High Speed Differential Amplifier |
| AD8132ARMZ-REEL7 | 功能描述:IC AMP DIFF LDIST LP 70MA 8MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 产品培训模块:Differential Circuit Design Techniques for Communication Applications 标准包装:1 系列:- 放大器类型:RF/IF 差分 电路数:1 输出类型:差分 转换速率:9800 V/µs 增益带宽积:- -3db带宽:2.9GHz 电流 - 输入偏压:3µA 电压 - 输入偏移:- 电流 - 电源:40mA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):3 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-VQFN 裸露焊盘，CSP 供应商设备封装:16-LFCSP-VQ 包装:剪切带 (CT) 产品目录页面:551 (CN2011-ZH PDF) 其它名称:ADL5561ACPZ-R7CT |
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