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| 型号： | LTC1061CSW#TR |
| 厂商： | Linear Technology |
| 文件页数： | 13/16页 |
| 文件大小： | 0K |
| 描述： | IC BUILDING BLK TRPL FLTR 20SOIC |
| 标准包装： | 1,000 |
| 滤波器类型： | 通用开关电容器 |
| 频率 - 截止或中心： | 35kHz |
| 滤波器数： | 3 |
| 滤波器阶数： | 6th |
| 电源电压： | 4.74 V ~ 16 V，±2.37 V ~ 8 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC |
| 包装： | 带卷 (TR) |
LTC1061
6
1061fe
Figure 1. The 6th Order LP Butterworth Filter of Figure 5
Operating with a Single 5V Supply
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
R3
VOUT
R1
VIN
0.1
F
1061 F01
LTC1061
+
R2
R1
R3
R2
R4
R1
R3
R2
T2L CLOCK
IN
fCLK < 1MHz
1
F
5V
2.49k
CIN
Clock Feedthrough
This is defined as the amplitude of the clock frequency
appearing at the output pins of the device, Figure 2. Clock
feedthrough is measured with all three sides of the LTC1061
connected as filters. The clock feedthrough mainly de-
pends on the magnitude of the power supplies and it is
independent from the input clock levels, clock frequency
and modes of operation.
The Table 2 illustrates the typical clock feedthrough num-
bers for various power supplies.
50/100/Hold (Pin 7)
By tying Pin 7 to V+, the filter operates with a clock-to-
center frequency internally set at 50:1. When Pin 7 is at
mid-supplies, the filter operates with a 100:1 clock-to-
center frequency ratio. Table 1 shows the allowable varia-
tion of the potential at Pin 7 when the 100:1 mode is
sought.
When Pin 7 is shorted to the negative supply pin, the filter
operation is stopped and the bandpass and lowpass
output act as a sample-and-hold circuit holding the last
sample of the input voltage. The hold step is around 2mV
and the droop rate is 150
V/sec.
Table 1
TOTAL POWER SUPPLY
VOLTAGE RANGE OF PIN 7
(V)
FOR 100:1 OPERATION (V)
5
2.5
± 0.5
10
5
±1
15
7.5
±1.5
Figure 2. Typical Clock Feedthrogh of the LTC1061 Operating
with
±5V Supplies. Top Trace is the Input Clock Swinging 0V to
5V and Bottom Trace is One of the Lowpass Outputs with Zero or
DC Input Signals.
A = 2V/DIV
B = 10mV/DIV
HORIZONTAL = 10
s/DIV
POWER SUPPLY (V)
CLOCK FEEDTHROUGH (VRMS)
±2.5
0.2
±5
0.4
±8
0.8
Table 2
Definition of Filter Functions
Refer to LTC1060 data sheet.
1061 F02
DESCRIPTIO A D
U
PI
U
APPLICATIO
U
HI TS
U
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