参数资料
| 型号： | AD845KNZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/12页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP JFET 16MHZ PREC 8DIP |
| 标准包装： | 50 |
| 放大器类型： | J-FET |
| 电路数： | 1 |
| 转换速率： | 100 V/µs |
| 增益带宽积： | 16MHz |
| 电流 - 输入偏压： | 500pA |
| 电压 - 输入偏移： | 100µV |
| 电流 - 电源： | 10mA |
| 电流 - 输出 / 通道： | 50mA |
| 电压 - 电源，单路/双路(±)： | ±4.75 V ~ 18 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-PDIP |
| 包装： | 管件 |
| 产品目录页面： | 766 (CN2011-ZH PDF) |
AD845
REV. E
–8–
Figure 5. Settling Time of the 3-Op Amp Instrumentation
Amplifier. Horizontal Scale is 200 ns/Div, Vertical Scale,
Positive Pulse Input is 5 V/Div and Output Settling is
1 mV/Div.
Figure 6. Settling Time of the Three Op Amp Instru-
mentation Amplifier. Horizontal Scale: 200 ns/Div; Vertical
Scale, Negative Pulse Input: 5 V/ Div; Output Settling:
1 mV/Div.
DRIVING THE ANALOG INPUT OF AN A/D CONVERTER
An op amp driving the analog input of an A/D converter, such
as that shown in Figure 7, must be capable of maintaining a
constant output voltage under dynamically changing load condi-
tions. In successive approximation converters, the input current
is compared to a series of switched trial currents. The compari-
son point is diode clamped but may deviate several hundred
millivolts, resulting in high frequency modulation of A/D input
current. The output impedance of a feedback amplifier is made
artificially low by the loop gain. At high frequencies, where the
loop gain is low, the amplifier output impedance can approach
its open-loop value. Most IC amplifiers exhibit a minimum
open-loop output impedance of 25
W due to current limiting
resistors. A few hundred microamps reflected from the change
in converter loading can introduce errors in instantaneous input
voltage. If the A/D conversion speed is not excessive and the
bandwidth of the amplifier is sufficient, the amplifier’s output
will return to the nominal value before the converter makes its
comparison. However, many amplifiers have relatively narrow
bandwidth, yielding slow recovery from output transients. The
AD845 is ideally suited to drive high resolution A/D converters
with 5
ms or longer conversion times since it offers both wide
bandwidth and high open-loop gain.
Figure 7. AD845 As ADC Unity Gain Buffer
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD845SCHIPS | 制造商:AD 制造商全称:Analog Devices 功能描述:Precision, 16 MHz CBFET Op Amp |
| AD845SQ | 功能描述:IC OPAMP JFET 16MHZ PREC 8CDIP RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:Excalibur™ 放大器类型:J-FET 电路数:1 输出类型:- 转换速率:45 V/µs 增益带宽积:10MHz -3db带宽:- 电流 - 输入偏压:20pA 电压 - 输入偏移:490µV 电流 - 电源:1.7mA 电流 - 输出 / 通道:48mA 电压 - 电源，单路/双路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作温度:-40°C ~ 85°C 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-SOIC 包装:带卷 (TR) |
| AD845SQ/883B | 制造商:Analog Devices 功能描述:OP Amp Single GP 制造商:Analog Devices 功能描述:OP AMP SGL GP 18V 8CDIP - Rail/Tube 制造商:Analog Devices Inc. 功能描述:Precision Amplifiers PRECISION 16MHZ H.S. AMP |
| AD846 | 制造商:AD 制造商全称:Analog Devices 功能描述:450 V/us, Precision, Current-Feedback Op Amp |
| AD8465 | 制造商:AD 制造商全称:Analog Devices 功能描述:Rail-to-Rail, Very Fast, 2.5 V to 5.5 V, Single-Supply LVDS Comparator |
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