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參數資料
| 型號： | LTC1066-1 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 14-Bit DC Accurate Clock-Tunable, 8th Order Elliptic or Linear Phase Lowpass Filter(14位直流精度，時鐘可調，８階橢圓形或線性相位低通濾波器) |
| 中文描述： | 14位直流精確時鐘可調，8階橢圓型或線性相位低通濾波器（14位直流精度，時鐘可調，8階橢圓形或線性相位低通濾波器） |
| 文件頁數： | 10/16頁 |
| 文件大?。?/td> | 302K |
| 代理商： | LTC1066-1 |
10
LTC1066-1
APPLICATIO
S I
FOR
ATIO
U
and 18, and between pins 10 and 4, to isolate the
precision op amp supply pin from the switched-capaci-
tor network supply (see the Test Circuit).
W
U
U
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
π
R
F
C
F
) is more than the
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 pass-
band gain. Curve D’s 20kHz cutoff is much higher than the
8Hz cutoff frequency of the R
F
C
F
feedback network, so its
passband is free from any additional error due to R
F
C
F
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.
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 = 0.25f
CUTOFF
. Unlike conven-
tional monolithic filters, the LTC1066-1 starts with an
FREQUENCY (Hz)
10
G
100
1k
10k 20k
1066-1 F04
1.00
0.75
0.50
0.25
0
–0.25
–0.50
–0.75
–1.00
T
A
= 25°C
f
CLK
/f
= 50:1
R
F
= 20k,
C
F
= 1
μ
F
CURVE D: f
CUTOFF
= 20kHz = 2500
×
2
π
R
F
C
F
CURVE C: f
CUTOFF
= 5kHz = 625
×
2
π
R
F
C
F
1
1
CURVE B: f
CUTOFF
= 2kHz = 250
×
2
π
R
F
C
F
1
CURVE A: f
CUTOFF
= 1kHz = 125
×
2
π
R
F
C
F
1
A
B
C
D
CLOCK FREQUENCY (MHz)
0
0.5
1.5
2.5
3.5
4.5
F
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
–0.6
–0.7
–0.8
4.0
1066-1 F02
1.0
2.0
3.0
5.0
V
S
= ±2.5V
V
S
= ±5V
V
S
= ±7.5V
LINEAR PHASE
T
A
= 25°C
f
CLK
/f
C
= 100:1
CLOCK FREQUENCY (MHz)
0
0.5
1.5
2.5
3.5
4.5
F
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
–1.2
4.0
1066-1 F03
1.0
2.0
3.0
5.0
V
S
= ±2.5V
V
S
= ±5V
V
S
= ±7.5V
T
A
= 25°C
f
CLK
/f
C
= 50:1
Figure 2. Output Offset Change vs Clock
(Relative to Offset for f
CLK
= 250kHz)
Figure 3. Output Offset Change vs Clock
(Relative to Offset for f
CLK
= 250kHz)
Figure 4. Passband Behavior
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC1066-1_09 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:14-Bit DC Accurate Clock-Tunable, 8th Order Elliptic or Linear Phase Lowpass Filter |
| LTC1066-1CS | 制造商:LINER 制造商全稱:Linear Technology 功能描述:14-Bit DC Accurate Clock-Tunable, 8th Order Elliptic or Linear Phase Lowpass Filter |
| LTC1066-1CSW | 功能描述:IC FILTR 8TH ORDR LOWPASS 18SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 濾波器類型:連續(xù)時間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數:4 濾波器階數:8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) |
| LTC1066-1CSW#PBF | 功能描述:IC FILTR 8TH ORDR LOWPASS 18SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 濾波器類型:連續(xù)時間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數:4 濾波器階數:8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) |
| LTC1066-1CSW#TR | 功能描述:IC FILTER LP 8TH ORDER 18SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 濾波器類型:連續(xù)時間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數:4 濾波器階數:8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) |
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