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参数资料
| 型号： | LTC1064CSW#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 17/20页 |
| 文件大小： | 0K |
| 描述： | IC FILTR BUILDNG BLK QUAD 24SOIC |
| 标准包装： | 32 |
| 滤波器类型： | 通用开关电容器 |
| 频率 - 截止或中心： | 140kHz |
| 滤波器数： | 4 |
| 滤波器阶数： | 8th |
| 电源电压： | ±2.37 V ~ 8 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC |
| 包装： | 管件 |
| 产品目录页面： | 1324 (CN2011-ZH PDF) |
LTC1064
6
1064fb
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
V–
CLK
50/100
AGND
V+
ANALOG
GROUND
PLANE
NOTE: PINS 5, 8, 20, IF NOT USED, SHOULD BE CONNECTED TO PIN 6
CLOCK INPUT
V+ = 15V, TRIP VOLTAGE = 7V
V+ = 10V, TRIP VOLTAGE = 6.4V
V+ = 5V, TRIP VOLTAGE = 3V
TO DIGITAL
GROUND
V+
LTC1064
0.1
F
5k
1064 F01
5k
1
F
V+/2
+
PIN FUNCTIONS
UU
U
AGND (Pin 6): Analog Ground. When the LTC1064 oper-
ates with dual supplies, Pin 6 should be tied to system
ground. When the LTC1064 operates with a single positive
supply, the analog ground pin should be tied to 1/2 supply
and it should be bypassed with a 1
F solid tantalum in
parallel with a 0.1
F ceramic capacitor, Figure 1. The
positive input of all the internal op amps, as well as the
common reference of all the internal switches, are inter-
nally tied to the analog ground pin. Because of this, a very
“clean” ground is recommended.
50/100 (Pin 17): By tying Pin 17 to V +, all filter sections
operate with a clock-to-center frequency ratio internally
set at 50:1. When Pin 17 is at mid-supplies, sections B and
C operate with (fCLK/fO) = 50:1 and sections A and D
operate at 100:1. When Pin 17 is shorted to the negative
supply pin, all filter sections operate with (fCLK/fO) =
100:1.
V +, V – (Pins 7, 19): Power Supplies. They should be
bypassed with a 0.1
F ceramic capacitor. Low noise,
nonswitching power supplies are recommended. The de-
vice operates with a single 5V supply and with dual
supplies. The absolute maximum operating power supply
voltage is
±8V.
CLK (Pin 18): Clock. For
±5V supplies the logic threshold
level is 1.4V. For
±8V and 0V to 5V supplies the logic
threshold levels are 2.2V and 3V respectively. The logic
threshold levels vary
±100mV over the full military tem-
perature range. The recommended duty cycle of the input
clock is 50%, although for clock frequencies below 500kHz,
the clock “on” time can be as low as 200ns. The maximum
clock frequency for
±5V supplies is 4MHz. For ±7V
supplies and above, the maximum clock frequency is
7MHz.
Figure 1. Single Supply Operation
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