参数资料
型号: MF6CWM-50
厂商: NATIONAL SEMICONDUCTOR CORP
元件分类: 运动控制电子
英文描述: 6th Order Switched Capacitor Butterworth Lowpass
中文描述: SWITCHED CAPACITOR FILTER, BUTTERWORTH, LOWPASS, PDSO14
封装: SO-14
文件页数: 9/20页
文件大小: 861K
代理商: MF6CWM-50
Pin Descriptions
(Pin Numbers) (Continued)
Pin
AGND (5)
Description
The analog ground pin. This pin sets
the DC bias level for the filter section
and the non-inverting input of
Op-Amp
#
1 and must be tied to the
system ground for split supply
operation or to mid-supply for single
supply operation (see section 1.2).
When tied to mid-supply this pin
should be well bypassed.
V
O1
is the output and INV1 is the
inverting input of Op-Amp
#
1. The
non-inverting input of this Op-Amp is
internally connected to the AGND
pin.
V
O2
is the output, INV2 is the
inverting input, and NINV2 is the
non-inverting input of Op-Amp
#
2.
The positive and negative supply
pins. The total power supply range is
5V to 14V. Decoupling these pins
with 0.1 μF capacitors is highly
recommended.
A CMOS Schmitt-trigger input to be
used with an external CMOS logic
level clock. Also used for
self-clocking Schmitt-trigger oscillator
(see section 1.1).
A TTL logic level clock input when in
split supply operation (
±
2.5V to
±
7V) and L. Sh tied to system
ground. This pin becomes a low
impedance output when L. Sh is tied
to V
. Also used in conjunction with
the CLK IN pin for a self clocking
Schmitt-trigger oscillator (see section
1.1).
Level shift pin, selects the logic
threshold levels for the desired
clock. When tied to V
it enables an
internal tri-state
buffer stage
between the Schmitt trigger and the
internal clock level shift stage thus
enabling the CLK IN Schmitt-trigger
input and making the CLK R pin a
low impedance output.
When the voltage level at this input
exceeds [25%(V
+
V
) + V
] the
internal tri-state buffer is disabled
allowing the CLK R pin to become
the clock input for the internal clock
level shift stage. The CLK R
threshold level is now 2V above the
voltage applied to the L. Sh pin.
Driving the CLK R pin with TTL logic
levels can be accomplished through
the use of split supplies and by tying
the L. Sh pin to system ground.
V
O1
(4),
INV1 (13)
V
O2
(2),
INV2 (14),
NINV2 (1)
V
+
(6), V
(10)
CLK IN (9)
CLK R (11)
L. Sh (12)
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