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| 型号： | AD712JRZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 9/20页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP BIFET DUAL PREC 8SOIC |
| 标准包装： | 1 |
| 放大器类型： | J-FET |
| 电路数： | 2 |
| 转换速率： | 20 V/µs |
| -3db带宽： | 4MHz |
| 电流 - 输入偏压： | 25pA |
| 电压 - 输入偏移： | 300µV |
| 电流 - 电源： | 5mA |
| 电流 - 输出 / 通道： | 25mA |
| 电压 - 电源，单路/双路(±)： | 9 V ~ 36 V，±4.5 V ~ 20 V |
| 工作温度： | 0°C ~ 70°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-SO |
| 包装： | 标准包装 |
| 其它名称： | AD712JRZ-REEL7DKR |
AD712
Rev. H | Page 17 of 20
FILTERS
ACTIVE FILTER APPLICATIONS
In active filter applications using op amps, the dc accuracy of
the amplifier is critical to optimal filter performance. The
amplifier offset voltage and bias current contribute to output
error. Offset voltage is passed by the filter and can be amplified
to produce excessive output offset. For low frequency applications
requiring large value input resistors, bias currents flowing
through these resistors also generate an offset voltage.
In addition, at higher frequencies, the op amp dynamics must
be carefully considered. Here, slew rate, bandwidth, and open-
loop gain play a major role in op amp selection. The slew rate
must be fast as well as symmetrical to minimize distortion. The
amplifier bandwidth in conjunction with the filter gain dictates
the frequency response of the filter.
The use of a high performance amplifier such as the AD712
minimizes both dc and ac errors in all active filter applications.
SECOND-ORDER LOW-PASS FILTER
Figure 48 depicts the AD712 configured as a second-order,
Butterworth low-pass filter. With the values as shown, the
corner frequency is 20 kHz; however, the wide bandwidth of the
AD712 permits a corner frequency as high as several hundred
kilohertz. Equations for component selection are as follows:
R1 = R2 = A user selected value (10 kΩ to 100 kΩ, typical)
C1 (in farads) = ()
()()1
2
414
.
1
R
f
cutoff
π
()
()()1
2
707
.
0
2
R
f
C
cutoff
π
=
+15V
1/2
AD712
0.1F
–15V
VOUT
VIN
C1
560pF
R2
20k
R1
20k
C2
280pF
+
–
0
08
23-
0
48
Figure 48. Second-Order Low-Pass Filter
An important property of filters is their out-of-band rejection.
The simple 20 kHz low-pass filter shown in Figure 48, can be
used to condition a signal contaminated with clock pulses or
sampling glitches that have considerable energy content at high
frequencies.
The low output impedance and high bandwidth of the AD712
minimize high frequency feedthrough as shown in Figure 49.
The upper trace is that of another low cost BiFET op amp
showing 17 dB more feedthrough at 5 MHz.
REF 20.0 dBm
10dB/DIV
RANGE 15.0dBm
OFFSET .0 Hz
0dB
CENTER 5 000 000.0Hz
RBW 30kHz
SPAN 10 000 000.0Hz
ST .8 SEC
VBW 30kHz
TYPICAL BIFET
AD712
00
82
3-
0
49
Figure 49. High Frequency Feedthrough
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD712KN | 制造商:Analog Devices 功能描述:OP Amp Dual GP 制造商:Rochester Electronics LLC 功能描述:HIGH SPEED DUAL BIFET AMP - Bulk 制造商:Analog Devices 功能描述:IC OP-AMP DUAL BIFET |
| AD712KN/+ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Operational Amplifier |
| AD712KNZ | 功能描述:IC OPAMP BIFET DUAL PREC 8DIP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.6 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:45nA 电压 - 输入偏移:2000µV 电流 - 电源:1.4mA 电流 - 输出 / 通道:40mA 电压 - 电源，单路/双路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) 其它名称:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| AD712KNZ | 制造商:Analog Devices 功能描述:Operational Amplifier (Op-Amp) IC |
| AD712KR | 制造商:Analog Devices 功能描述:OP Amp Dual GP ±18V 8-Pin SOIC N 制造商:Rochester Electronics LLC 功能描述:HIGH SPEED DUAL BIFET AMP - Bulk 制造商:Analog Devices 功能描述:IC OP-AMP BIFET DUAL 制造商:Analog Devices 功能描述:Operational Amplifier, Dual AMP, Bipolar/JFET, 8 Pin, Plastic, SOP |
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