The V+ and V
參數(shù)資料
型號(hào)： LTC1068IG#TRPBF
廠商： Linear Technology
文件頁(yè)數(shù)： 2/30頁(yè)
文件大?。?/td> 0K
描述： IC FILTR BUILDNG BLK QUAD 28SSOP
標(biāo)準(zhǔn)包裝： 2,000
濾波器類(lèi)型： 通用開(kāi)關(guān)電容器
頻率 - 截止或中心： 50kHz
濾波器數(shù)： 4
濾波器階數(shù)： 8th
電源電壓： 3.14 V ~ 11 V，±3.14 V ~ 5.5 V
安裝類(lèi)型： 表面貼裝
封裝/外殼： 28-SSOP（0.209"，5.30mm 寬）
供應(yīng)商設(shè)備封裝： 28-SSOP
包裝： 帶卷 (TR)
LTC1068 Series
10
1068fc
PIN FUNCTIONS
Power Supply Pins
The V+ and V– pins should each be bypassed with a
0.1F capacitor to an adequate analog ground. The filter’s
power supplies should be isolated from other digital or
high voltage analog supplies. A low noise linear supply
is recommended. Using a switching power supply will
lower the signal-to-noise ratio of the filter. Figures 1 and 2
show typical connections for dual and single supply
operation.
Analog Ground Pin
Thefilter’sperformancedependsonthequalityoftheanalog
signal ground. For either dual or single supply operation,
ananaloggroundplanesurroundingthepackageisrecom-
mended. The analog ground plane should be connected
to any digital ground at a single point. For single supply
operation,AGNDshouldbebypassedtotheanalogground
plane with at least a 0.47F capacitor (Figure 2).
Two internal resistors bias the analog ground pin. For the
LTC1068, LTC1068-200 and LTC1068-25, the voltage at
the analog ground pin (AGND) for single supply is 0.5
× V+
and for the LTC1068-50 it is 0.435
× V+.
Clock Input Pin
Any TTL or CMOS clock source with a square-wave output
and50%dutycycle(±10%)isanadequateclocksourcefor
the device. The power supply for the clock source should
not be the filter’s power supply. The analog ground for the
filter should be connected to clock’s ground at a single
point only. Table 2 shows the clock’s low and high level
threshold values for dual or single supply operation.
Table 2. Clock Source High and Low Threshold Levels
POWER SUPPLY
HIGH LEVEL
LOW LEVEL
Dual Supply = ±5V
≥ 1.53V
≤ 0.53V
Single Supply = 5V
≥ 1.53V
≤ 0.53V
Single Supply = 3.3V
≥ 1.20V
≤ 0.53V
A pulsed generator can be used as a clock source provided
the high level ON time is at least 25% of the pulse period.
Sine waves are not recommended for clock input frequen-
cies less than 100kHz, since excessively slow clock rise
or fall times generate internal clock jitter (maximum clock
rise or fall time ≤ 1s). The clock signal should be routed
from the right side of the IC package and perpendicular to
it to avoid coupling to any input or output analog signal
Figure 1. Dual Supply Ground Plane Connections
Figure 2. Single Supply Ground Plane Connections
0.1F
V–
1068 F01
200
DIGITAL GROUND
V+
LTC1068
CLOCK
SOURCE
0.1F
ANALOG
GROUND
PLANE
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
STAR
SYSTEM
GROUND
1068 F02
200
DIGITAL GROUND
FOR MODE 3, THE S NODE
SHOULD BE TIED TO PIN 7 (AGND)
V+
LTC1068
RA
RB
CLOCK
SOURCE
0.1F
VAGND
0.47F
(1F FOR
STOPBAND
FREQUENCIES
≤1kHz)
ANALOG
GROUND
PLANE
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
STAR
SYSTEM
GROUND
DEVICE
LTC1068
LTC1068-200
LTC1068-25
LTC1068-50
RA
10k
11.3k
RB
10k
8.6k
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參數(shù)描述
LTC1068IN 功能描述:IC FILTR BUILDNG BLK QUAD 24-DIP RoHS:否 類(lèi)別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1,000 系列:- 濾波器類(lèi)型:連續(xù)時(shí)間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數(shù):4 濾波器階數(shù):8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類(lèi)型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR)
LTC1068IN#PBF 功能描述:IC FILTR BUILDNG BLK QUAD 24-DIP RoHS:是 類(lèi)別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1,000 系列:- 濾波器類(lèi)型:連續(xù)時(shí)間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數(shù):4 濾波器階數(shù):8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類(lèi)型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR)
LTC1068IN-PBF 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Clock-Tunable, Quad Second Order, Filter Building Blocks
LTC1069-1 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Low Power, 8th Order Progressive Elliptic, Lowpass Filter
LTC1069-1C 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Low Power, 8th Order Progressive Elliptic, Lowpass Filter
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