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| 型号： | LTC1066-1CSW |
| 厂商： | Linear Technology |
| 文件页数： | 3/20页 |
| 文件大小： | 0K |
| 描述： | IC FILTR 8TH ORDR LOWPASS 18SOIC |
| 标准包装： | 40 |
| 滤波器类型： | 贝塞尔，低通开关电容器 |
| 频率 - 截止或中心： | 50kHz |
| 滤波器数： | 1 |
| 滤波器阶数： | 8th |
| 电源电压： | 4.75 V ~ 16 V，±2.375 V ~ 8 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 18-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 18-SOIC |
| 包装： | 管件 |
| 其它名称： | LTC1066-1CS |
LTC1066-1
11
10661fa
APPLICATIONS INFORMATION
WU
U
AC PERFORMANCE
AC (Passband) Gain
The passband gain of the LTC1066-1 is equal to the
passband gain of the internal switched-capacitor lowpass
filter, and it is measured at f = 0.25fCUTOFF. Unlike conven-
tional monolithic filters, the LTC1066-1 starts with an
absolutely perfect 0dB DC gain and phases into an “imper-
fect” AC passband gain, typically
±0.1dB.
The filter’s low passband ripple, typically 0.05dB, is mea-
sured with respect to the AC passband gain.
The LTC1066-1 DC stabilizing loop slightly warps the
filter’s passband performance if the – 3dB frequency of the
feedback passive elements (1/2
πRFCF) is more than the
Figure 4. Passband Behavior
FREQUENCY (Hz)
10
GAIN
(dB)
100
1k
10k 20k
1066-1 F04
1.00
0.75
0.50
0.25
0
–0.25
–0.50
–0.75
–1.00
TA = 25°C
fCLK/fC = 50:1
RF = 20k,
CF = 1F
CURVE D: fCUTOFF = 20kHz = 2500 × 2πR
FCF
1
CURVE C: fCUTOFF = 5kHz = 625 × 2πR
FCF
1
CURVE B: fCUTOFF = 2kHz = 250 ×
2
πRFCF
1
CURVE A: fCUTOFF = 1kHz = 125 × 2πR
FCF
1
A
B
CD
cutoff frequency of the internal switched-capacitor filter
divided by 250. The LTC1066-1 clock tunability directly
relates to the above constraint. Figure 4 illustrates the
passband behavior of the LTC1066-1 and it demonstrates
the clock tunability of the device. A typical LTC1066-1
device was used to trace all four curves of Figure 4. Curve
D, for instance, has nearly zero ripple and 0.04dB passband
gain. Curve D’s 20kHz cutoff is much higher than the 8Hz
cutoff frequency of the RFCF feedback network, so its
passband is free from any additional error due to RFCF
feedback elements. Curve B illustrates the passband error
when the 1MHz clock of curve D is lowered to 100kHz. A
0.1dB error is added to the filter’s original AC gain of
0.04dB.
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| LTC1066-1CSW#PBF | 功能描述:IC FILTR 8TH ORDR LOWPASS 18SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 滤波器 - 有源 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1,000 系列:- 滤波器类型:连续时间，带通低通 频率 - 截止或中心:150kHz 滤波器数:4 滤波器阶数:8th 电源电压:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) |
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