參數(shù)資料
型號(hào)： LTC1069-6IS8#TRPBF
廠商： Linear Technology
文件頁(yè)數(shù)： 8/10頁(yè)
文件大?。?/td> 0K
描述： IC FILTR 8TH ORDER LOWPASS 8SOIC
標(biāo)準(zhǔn)包裝： 2,500
濾波器類型： 橢圓，低通開關(guān)電容器
頻率 - 截止或中心： 14kHz/20kHz
濾波器數(shù)： 1
濾波器階數(shù)： 8th
電源電壓： 3 V ~ 10 V
安裝類型： 表面貼裝
封裝/外殼： 8-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 8-SOIC
包裝： 帶卷 (TR)
LTC1069-6
7
10696fa
APPLICATIONS INFORMATION
Temperature Behavior
The power supply current of the LTC1069-6 has a positive
temperature coefcient. The GBW product of its internal
op amps is nearly constant and the speed of the device
does not degrade at high temperatures. Figures 4a, 4b
and 4c show the behavior of the passband of the device
for various supplies and temperatures. The lter has a
passband behavior which is temperature independent.
Clock Feedthrough
The clock feedthrough is dened as the RMS value of the
clock frequency and its harmonics that are present at the
lter’s Output (Pin 8). The clock feedthrough is tested with
the Input (Pin 4) shorted to AGND (Pin 1) and depends on
PC board layout and on the value of the power supplies.
With proper layout techniques the values of the clock
feedthrough are shown in Table 2.
Table 2. Clock Feedthrough
VS
CLOCK FEEDTHROUGH
3.3V
100μVRMS
5V
170μVRMS
10V
350μVRMS
Any parasitic switching transients during the rising and
falling edges of the incoming clock are not part of the
clock feedthrough specications. Switching transients
have frequency contents much higher than the applied
clock; their amplitude strongly depends on scope probing
techniques as well as grounding and power supply
bypassing. The clock feedthrough can be reduced by adding
a single RC lowpass lter at the Output (Pin 8).
FREQUENCY (kHz)
1
GAIN
(dB)
1
2
17
1069-6 F04a
0
–1
–2
5
9
13
319
7
11
15
21
VS = SINGLE 3V
VIN = 0.5VRMS
fCLK = 500kHz
fCUTOFF = 10kHz
85°C
–40°C
Figure 4a
FREQUENCY (kHz)
1
GAIN
(dB)
1
2
17
1069-6 F04a
0
–1
–2
5
9
13
319
7
11
15
21
VS = SINGLE 5V
VIN = 1VRMS
fCLK = 750kHz
fCUTOFF = 15kHz
85°C
–40°C
FREQUENCY (kHz)
1
GAIN
(dB)
1
2
25
1069-6 F04c
0
–1
–2
7
13
19
428
10
16
22
31
VS = ±5V
VIN = 1.5VRMS
fCLK = 1MHz
fCUTOFF = 20kHz
85°C
–40°C
Figure 4b
Figure 4c
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