National Semiconductor LMF90 Technical data
查询LMF90供应商
LMF90
4th-Order Elliptic Notch Filter
General Description
The LMF90 is a fourth-order elliptic notch (band-reject) filter
based on switched-capacitor techniques. No external components are needed to define the response function. The
depth of the notch is set using a two-level logic input, and
the width is programmed using a three-level logic input. Two
different notch depths and three different ratios of notch
width to center frequency may be programmed by connecting these pins to V
logic pin sets the ratio of clock frequency to notch frequency.
An internal crystal oscillator is provided. Used in conjunction
with a low-cost color TV crystal and the internal clock frequency divider, a notch filter can be built with center frequency at 50 Hz, 60 Hz, 100 Hz, 120 Hz, 150 Hz, or 180 Hz
for rejection of power line interference. Several LMF90s can
be operated from a single crystal. An additional input is provided for an externally-generated clock signal.
Features
Y
Center frequency set by external clock or on-board
clock oscillator
a
, ground, or Vb. Another three-level
December 1994
Y
No external components needed to set response characteristics
Y
Notch width, attenuation, and clock-to-center-frequency
ratio independently programmable
Y
14 pin 0.3×wide package
Key Specifications
Y
f0Range 0.1 Hz to 30 kHz
Y
f0accuracy over full temperature range (max) 1.5%
Y
Supply voltage range
Y
Passband Ripple (typ) 0.25 dB
Y
Attenuation at f0(typ) 39 dB or 48 dB (selectable)
Y
f
CLK:f0
Y
Notch Bandwidth (typ) 0.127 f0, 0.26 f0, or 0.55 f
Y
Output offset voltage (max) 120 mV
g
2V tog7.5V or 4V to 15V
100:1, 50:1, or 33.3:1
Applications
Y
Automatic test equipment
Y
Communications
Y
Power line interference rejection
LMF90 4th-Order Elliptic Notch Filter
0
Typical Connection
60 Hz Notch Filter
Connection
Diagram
Dual-In-Line and Small
Outline Packages
TL/H/10354– 2
Top View
Order Number LMF90CCN,
LMF90CIWM,
LMF90CCWM, LMF90CIJ,
LMF90CCJ, LMF90CIN,
LMF90CMJ or
TL/H/10354– 1
LMF90CMJ/883
See NS Package Number
J14A, M14B or N14A
C
1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.
TL/H/10354
Units
1.5% (Max)
g
1.5% 50.25
g
1% 50.25
g
50.25
1.5% (Max)
g
1.5% 100.5
g
1% 100.5
g
100.5
0.2 dB (Max)
g
0.2 0
g
0.2
g
0
0.2 dB (Max)
g
0.2 0
g
0.2
g
0
0.2 dB (Max)
g
0.2 0
g
0.2
g
0
1.5% (Max)
Limit Limit
Tested Design (Limit)
Typ
C
C
C
C
§
§
§
§
150
a
Cto
§
65
b
T
s
T
s
MAX
A
MIN
C
C
C
§
§
§
85
70
125
a
a
a
s
s
s
A
A
A
T
T
T
s
s
C
C
§
§
40
b
5V unless otherwise specified. Boldface limits apply for
s
C
§
eb
55
b
b
5V and V
LMF90CCJ, LMF90CCN, LMF90CIJ, LMF90CIWM,
ea
a
(Note 7)
Limit Limit
LMF90CCWM LMF90CIN, LMF90CMJ
Tested Design
Typ
(Note 7)
(Note 8) (Note 9) (Note 8) (Note 9)
g
1.5% 33.5
g
1% 33.5
g
33.5
16V Storage Temperature Range
a
0.3V to
b
)
b
V
b
a
V
e
S
LMF90CCJ 0
LMF90CCN, LMF90CCWM,
LMF90CIJ, LMF90CIWM, LMF90CIN
Operating Ratings (Notes2&3)
Temperature Range T
0.3V Junction Temperature 150
a
a
0.3V to V
b
b
LMF90CMJ, LMF90CMJ/883
Supply Voltage Range 4.0V to 15.0V
C.
§
25
e
J
T
e
A
Pins 4 and 5 4.0 4.0 4.0 MHz (Max)
a
b
,
V
e
,R
V
e
D
e
167 kHz
e
CLK
GND,
e
R
e
D
e
W
250 kHz
e
CLK
f
; all other limits T
MAX
,
a
V
e
,R
,
b
b
V
V
e
e
D
e
GND, R
e
,D
500 kHz
a
V
e
e
CLK
W
f
167 kHz
e
CLK
f
GND,
e
R
e
D
e
W
250 kHz
e
CLK
f
,
b
V
e
GND, R
e
,D
500 kHz
a
V
e
e
CLK
W
f
to T
Center Frequency 0.1 0.1 Hz (Min)
Range 30 30 30 kHz (Max)
Clock Frequency Pin 6 10 10 Hz (Min)
Range Pin 6 1.5 1.5 1.5 MHz (Max)
Clock-to-Center- W
O1
/f
CLK
f
Frequency Ratio f
O2
/f
CLK
f
MIN
T
Pin 9 1800V
Absolute Maximum Ratings (Notes1&3)
If Military/Aerospace specified devices are required, Soldering Information (Note 4)
please contact the National Semiconductor Sales N Package (Soldering, 10 sec.) 260
Office/Distributors for availability and specifications. J Package (Soldering, 10 sec.) 300
Supply Voltage (V
Package Input Current (Note 10) 20 mA
Input Current at any Pin (Note 10) 5 mA
Voltage at any Input or Output V
Power Dissipation (Note 5) 500 mW
All Other Pins 2000V
ESD Susceptability (Note 6)
e
A
AC Electrical Characteristics The following specifications apply for V
T
Symbol Parameter Conditions
O
CLK
f
f
/f
f
O3
CLK
Passband Gain DC and 20 kHz, W
ON
H
2
Units
5V unless otherwise specified. Boldface limits apply for
eb
b
5V and V
ea
a
C. (Continued)
§
25
e
J
T
e
A
Limit Limit
Tested Design (Limit)
Typ
LMF90CCWM LMF90CIN, LMF90CMJ
Limit Limit
Tested Design
LMF90CCJ, LMF90CCN, LMF90CIJ, LMF90CIWM,
Typ
0.025 (Max)
g
0.025 0.265
g
0.025 0.265
g
0.265
GND,
e
R
e
D
e
250 kHz
e
CLK
f
,
b
V
e
GND, R
e
,D
a
V
e
W
0.05 (Max)
g
0.05 0.550
g
0.05 0.550
g
0.550
a
b
500 kHz
e
CLK
f
e
e
e
,
V
,R
V
D
30 dB (Max)
b
39
b
30
b
30
b
39
b
167 kHz
e
CLK
36.5 dB (Max)
b
48
b
36.5
b
36.5
b
48
b
GND,
e
R
e
D
e
W
250 kHz
e
CLK
f
b
a
,
V
e
GND, R
e
,D
V
e
W
36.5 dB (Max)
b
48
b
36.5
b
36.5
b
48
b
500 kHz
e
CLK
f
a
b
,
V
e
,R
V
e
GND, D
e
30 dB (Max)
b
36
b
30
b
30
b
36
b
167 kHz
e
CLK
a
b
a
,
V
e
,R
V
e
,D
V
e
W
30 dB (Max)
b
36
b
30
b
30
b
36
b
167 kHz
e
CLK
f
a
b
,
V
e
GND, R
e
,D
V
e
W
30 dB (Max)
b
42
b
30
b
30
b
42
b
167 kHz
e
CLK
f
a
e
e
e
35 dB (Max)
b
48
b
35
b
35
b
48
b
,
V
GND, R
D
W
167 kHz
e
CLK
f
35 dB (Max)
b
48
b
35
b
35
b
48
b
,
a
V
e
GND,R
e
,D
a
V
e
e
W
167 kHz
CLK
f
0.0175 (Max)
g
(Note 7)
0.0175 0.1275
g
0.0175 0.1275
g
(Note 8) (Note 9) (Note 8) (Note 9)
0.1275
(Note 7)
,
a
V
e
,R
b
V
e
167 kHz
D
e
e
CLK
; all other limits T
MAX
to T
MIN
T
e
A
AC Electrical Characteristics The following specifications apply for V
T
Symbol Parameter Conditions
Frequency W
Width to Center f
PBW Ratio of Passband W
Gain at W
f
@
A
O1
Min1
Center Frequency f
O2
O3
f
f
@
@
Min2
Min3
A
A
O1
Tests at f
Additional Center W
Frequency Gain f
3
Units
Tested Design (Limit)
Typ
Limit Limit
(Note 7)
30 dB (Max)
b
36
b
30
b
30 dB (Max)
b
36
b
30
b
30 dB (Max)
b
36
b
30
b
30 dB (Max)
b
42
b
30
b
35 dB (Max)
b
48
b
35
b
30 dB (Max)
b
36
b
30
b
30 dB (Max)
b
36
b
30
b
30 dB (Max)
b
36
b
30
b
30 dB (Max)
b
42
b
30
b
35 dB (Max)
b
48
b
35
b
30 dB (Max)
b
41
b
30
b
30 dB (Max)
b
41
b
30
b
35 dB (Max)
b
40
b
35
b
35 dB (Max)
b
40
b
35
b
35 dB (Max)
b
41
b
35
b
35 dB (Max)
b
41
b
35
b
5V unless otherwise specified. Boldface limits apply for
eb
b
5V and V
ea
a
C. (Continued)
§
25
e
J
T
e
A
; all other limits T
MAX
to T
MIN
T
e
A
AC Electrical Characteristics The following specifications apply for V
T
Limit Limit
Tested Design
LMF90CCWM LMF90CIN, LMF90CMJ
LMF90CCJ, LMF90CCN, LMF90CIJ, LMF90CIWM,
Typ
Symbol Parameter Conditions
30
30
30
30
35
30
30
30
30
35
30
30
35
35
35
CLK
O2
3
3b
35
b
b
b
40
41
41
0.25 0.9 0.9 0.25 0.9 dB (Max)
0.25 0.9 0.9 0.25 0.9 dB (Max)
167 kHz 0.25 0 0 0.25 0 dB (Min)
e
CLK
f
0.25 0 0 0.25 0 dB (Min)
O1
1.094 f
e
6
f
b
b
b
O1
0.914 f
e
5
b
V
,f
e
a
V
e
GND, R
,R
e
b
V
,D
500 kHz
e
a
V
D
e
e
e
CLK
W
f
O2
O3
O3
1.008 f
0.982 f
1.018 f
e
e
e
4
3
4
Gain at f
Gain at f
Gain at f
Passband Ripple W
4b
3c
4c
A
max1
A
A
A
b
b
b
b
b
b
b
b
b
b
b
b
(Note 8) (Note 9) (Note 8) (Note 9)
36
36
36
42
48
36
36
36
42
b
b
b
b
b
b
b
(Note 7)
GND,
250 kHz
e
Frequency Gain f
CLK
GND,
e
e
,R
,R
b
b
V
V
e
e
,D
250 kHz
a
GND, D
V
e
e
e
CLK
W
W
f
O2
Tests at f
250 kHz
e
CLK
f
GND,
e
R
e
,D
b
V
e
W
250 kHz
e
CLK
f
GND,
e
R
e
,D
a
V
e
W
250 kHz
e
CLK
f
,
b
V
e
R
e
500 kHz
D
e
e
CLK
Additional Center W
Frequency Gain f
GND,
e
,R
b
V
e
,D
b
V
e
Additional Center W
b
,
,
b
b
V
V
e
e
,R
,R
b
b
V
V
e
e
,D
500 kHz
500 kHz
a
GND, D
V
e
e
e
e
CLK
W
CLK
W
f
f
O3
Tests at f
48
b
b
,
b
V
,
e
b
V
e
GND, R
e
GND, R
,D
500 kHz
e
b
500 kHz
V
D
e
e
e
e
CLK
W
CLK
W
f
f
b
41
41
40
b
b
b
250 kHz
e
,
a
V
e
GND, f
,R
e
b
V
R
e
167 kHz
e
D
D
e
e
e
CLK
W
f
W
O1
O1
0.995 f
1.005 f
0.992 f
e
e
e
3
4
Gain at f
Gain at f
Gain at f
3a
4a
A
A
A
4
5V unless otherwise specified. Boldface limits apply for
eb
b
5V and V
ea
a
Units
Limit Limit
Tested Design (Limit)
Typ
Limit Limit
Tested Design
LMF90CCWM LMF90CIN, LMF90CMJ
LMF90CCJ, LMF90CCN, LMF90CIJ, LMF90CIWM,
Typ
(Note 7)
(Note 8) (Note 9) (Note 8) (Note 9)
1 1 MHz
33V/ms
0.25 0.9 0.9 0.26 0.9 dB (Max)
0.25 0.9 0.9 0.25 0.9 dB (Max)
0.25 0 0 0.25 0 dB (Min)
0.25 0.9 0.9 0.25 0.9 dB (Max)
0.25 0.9 0.9 0.25 0.9 dB (Max)
(Note 7)
O2
O2
O3
0.25 0 0 0.25 0 dB (Min)
O3
250 250 m Vrms
200 200 pF
C. (Continued)
§
25
e
J
T
e
A
; all other limits T
MAX
to T
MIN
T
e
A
AC Electrical Characteristics The following specifications apply for V
T
Symbol Parameter Conditions
0.830 f
e
5
GND, f
e
R
e
D
e
Passband Ripple W
Max2
A
250 kHz 0.25 0 0 0.25 0 dB (Min)
e
CLK
f
1.205 f
0.700 f
b
a
e
5
f
V
e
GND, R
e
,D
V
e
Passband Ripple W
Max3
A
500 kHz 0.25 0 0 0.25 0 dB (Min)
e
CLK
f
e
1.428 f
6
f
167 kHz 670 670 mVrms
e
250 kHz 370 370 mVrms
b
e
CLK
,f
CLK
a
V
e
GND, f
,R
e
b
V
R
e
e
a
D
D
e
e
W
W
Output Noise 20 kHz Bandwidth
n
E
,
V
e
GND, R
e
,D
V
e
W
500 kHz
e
CLK
f
Clock Feedthrough 50 50 mVp–p
Gain Bandwidth
GBW Output Buffer
Slew Rate
SR Output Buffer
Maximum Capacitive
Load
L
C
e
6
f
5
Units
5V unless otherwise specified. Boldface Limits Apply for
eb
b
5V and V
ea
a
LMF90CCJ, LMF90CCN, LMF90CIJ, LMF90CIWM,
C.
§
25
e
J
T
e
A
Limit Limit
Tested Design (Limit)
Typ
(Note 7)
Limit Limit
Tested Design
LMF90CCWM LMF90CIN, LMF90CMJ
Typ
(Note 7)
4.0 V (Min)
a
4.0
a
4.0
a
10 mA (Max)
g
10
g
10
g
a
V
e
4.0 V (Max)
b
4.0
b
4.0
b
GND
e
4.0 V(Min)
a
4.0
a
4.0
a
b
b
a
a
a
a
or
V
e
10V, XLS
e
V
b
0.8 V (Max)
0.8
0.8
2.5V
ea
0V, XLS
e
b
5V, V
ea
a
2.0 V (Min)
a
2.0
a
2.0
a
a
4mA
e
l
OUT
I
l
,
V
e
4.0 V (Max)
b
4.0
b
4.0
b
4.0 V (Min)
a
4.0
a
4.0
a
1.0 V (Max)
4.0 V (Max)
170 mV (Max)
g
80
g
170
g
170
g
80
g
,
b
V
e
GND, R
e
,D
a
V
e
W
500 kHz
e
CLK
f
4.0 V (Min)
g
4.7
b
4.2,
a
4.0
g
4.0
g
4.7
b
4.2,
a
5kX
e
L
120 mV (Max)
140 mV (Max)
g
g
50
60
g
g
120
140
g
g
120
140
g
GND 2.35 5.0 5.0 2.35 5.0 mA (Max)
e
IN2
V
e
IN1
500 kHz, V
e
CLK
a
b
50
g
167 kHz
e
,f
V
e
,R
V
e
D
e
CLK
g
60
g
250 kHz
e
CLK
GND, f
e
R
e
D
e
W
(Note 8) (Note 9) (Note 8) (Note 9)
b
4.0
b
4.0
b
a
1.0
a
1.0
a
1.0 V (Min)
b
1.0
b
1.0
b
; all other limits T
MAX
to T
MIN
T
e
A
DC Electrical Characteristics The following specifications apply for V
T
Symbol Parameter Conditions
Power Supply Current f
Output Offset Voltage W
OS
S
I
V
Output Voltage Swing R
OUT
V
Logical ‘‘Low’’ Pins 1, 2, 3, 7, and 10
I1
V
Logical ‘‘GND’’ Pins 1, 2, 3, 7, and 10
Input Voltage
I2
V
Logical ‘‘High’’ Pins 1, 2, 3, and 7
Input Voltage
I3
V
Input Current Pins 1, 2, 3, 7, and 10
Input Voltage
IN
I
Logical ‘‘0’’ Input Pin 5, XLS
IL
V
Voltage, Pins 5 and 6 or Pin 6, XLS
Logical ‘‘1’’ Input
IH
V
Voltage, Pins 5 and 6
Logical ‘‘0’’ Input V
Logical ‘‘1’’ Input
Voltage, Pin 6
Logical ‘‘0’’ Output XLS
Voltage, Pin 6
Voltage, Pin 6 V
IL
IH
V
V
Logical ‘‘1’’ Output
Voltage, Pin 6
OL
OH
V
V
6
DC Electrical Characteristics (Continued)
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.
Note 2: Operating Ratings indicate conditions for which the device is intended to be functional. These ratings do not guarantee specific performance limits,
however. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions
listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions.
Note 3: All voltages are measured with respect to GND unless otherwise specified.
Note 4: See AN450 ‘‘Surface Mounting Methods and Their Effect on Product Reliability’’ or the section titled ‘‘Surface Mount’’ found in any current Linear Data
Book for other methods of soldering surface mount devices.
Note 5: The maximum power dissipation must be derated at elevated temperatures and is dictated by T
allowable power dissipation at any temperature is P
device, T
CWIM and 59
e
150§C, and the typical thermal resistance (HJA) when board mounted is 61§C/W for the LMF90CCN and CIN, 134§C/W for the LMF90CCWM and
JMAX
C/W for the LMF90CCJ, CIJ and CMJ.
§
e
b
(T
D
TA)/HJAor the number given in the Absolute Maximum Ratings, whichever is lower. For this
JMAX
Note 6: Human body model, 100 pF discharged through a 1.5 kX resistor.
Note 7: Typicals are at T
Note 8: Tested Limits are guaranteed and 100% tested.
e
25§C and represent the most likely parametric norm.
J
Note 9: Design Limits are guaranteed, but not 100% tested.
Note 10: When the input voltage (V
maximum package input current rating limits the number of pins that can safely exceed the power supplies with an input current of 5 mA to four.
) at any pin exceeds the power supplies (V
IN
k
IN
Vbor V
l
IN
, HJAand the ambient temperature, TA. The maximum
JMAX
Va), the current at that pin should be limited to 5 mA. The 20 mA
7
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