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參數(shù)資料
| 型號(hào)： | LTC1562IG-2#TR |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 12/16頁 |
| 文件大小： | 0K |
| 描述： | IC FILTER UNIV RC QUAD LN 20SSOP |
| 標(biāo)準(zhǔn)包裝： | 1,800 |
| 濾波器類型： | 通用連續(xù)計(jì)時(shí) |
| 頻率 - 截止或中心： | 300kHz |
| 濾波器數(shù)： | 4 |
| 濾波器階數(shù)： | 8th |
| 電源電壓： | 4.75 V ~ 10.5 V，±4.75 V ~ 5.25 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-SSOP（0.209"，5.30mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 20-SSOP |
| 包裝： | 帶卷 (TR) |
5
LTC1562-2
15622fa
PIN FUNCTIONS
UU
U
Shutdown (SHDN): When the SHDN input goes high or is
open-circuited, the LTC1562-2 enters a “zero-power”
shutdown state and only junction leakage currents flow.
The AGND pin and the amplifier outputs (see Figure 3)
assume a high impedance state and the amplifiers effec-
tively disappear from the circuit. (If an input signal is
applied to a complete filter circuit while the LTC1562-2 is
in shutdown, some signal will normally flow to the output
through passive components around the inactive op amps.)
A small pull-up current source at the SHDN input
defaults
the LTC1562-2 to the shutdown state if the SHDN pin is left
floating. Therefore, the user must connect the SHDN pin
to a logic “l(fā)ow” (0V for
±5V supplies, V– for 5V total
supply) for normal operation of the LTC1562-2. (This
convention permits true “zero-power” shutdown since not
even the driving logic must deliver current while the part
is in shutdown.) With a single supply voltage, use V – for
logic “l(fā)ow,” do not connect SHDN to the AGND pin.
should be connected to the ground plane (Figure 1). For
single supply operation, the AGND pin should be bypassed
to the ground plane with at least a 0.1
F capacitor (at least
1
F for best AC performance) (Figure 2).
0.1
F
V–
1562-2 F01
DIGITAL
GROUND PLANE
(IF ANY)
V+
LTC1562-2
0.1
F
ANALOG
GROUND
PLANE
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
SINGLE-POINT
SYSTEM GROUND
Figure 1. Dual Supply Ground Plane Connection
(Including Substrate Pins 4, 7, 14, 17)
1
F
1562-2 F01
DIGITAL
GROUND PLANE
(IF ANY)
V+
LTC1562-2
V+/2
REFERENCE
0.1
F
ANALOG
GROUND
PLANE
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
SINGLE-POINT
SYSTEM GROUND
Figure 2. Single Supply Ground Plane Connection
(Including Substrate Pins 4, 7, 14, 17)
–
+
–
R2
RQ
VIN
INV
*R1 AND C ARE PRECISION
INTERNAL COMPONENTS
V2
V1
1/4 LTC1562-2
1562-2 F03
C
1
sR1C*
ZIN
ZIN TYPE
R
C
RESPONSE
AT V1
BANDPASS
HIGHPASS
RESPONSE
AT V2
LOWPASS
BANDPASS
7958
R2
IN EACH CASE,
Q =
fO = (200kHz)
RQ
R2
()
200kHz
fO
()
Figure 3. Equivalent Circuit of a Single 2nd Order Section
(Inside Dashed Line) Shown in Typical Connection. Form of
ZIN Determines Response Types at the Two Outputs (See Table)
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