lmf60 National Semiconductor Corporation, lmf60 Datasheet - Page 5

• Manufacturer Part Number: lmf60
• Description: High Performance 6th-order Switched Capacitor Butterworth Lowpass Filter
• Manufacturer: National Semiconductor Corporation

Logic Input-Output Characteristics
The following specifications apply for V
Note 1 Absolute Maximum Ratings indicate limits beyond which damage to the device may occur Operating Ratings indicate conditions for which the device is
functional Specified Electrical Characteristics do not apply when operating the device outside its specified conditions
Note 2 All voltages are measured with respect to AGND unless otherwise specified
Note 3 When the input voltage (V
to 5 mA or less The 20 mA package input current limits the number of pins that can exceed the power supply boundaries with 5 mA to four
Note 4 The Maximum power dissipation must be derated at elevated temperatures and is dictated by T
allowable power dissipation is PD
typical junction-to-ambient thermal resistance of the LMF60CCN when board mounted is 67 C W For the LMF60CIJ this number decreases to 62 C W For the
LMF60CIWM i
Note 5 Human body model 100 pF discharged through a 1 5 kX resistor
Note 6 See AN450 ‘‘Surface Mounting Methods and Their Effect on Product Reliability’’ or the section titled ‘‘Surface Mount’’ found in any current Linear Databook
for other methods of soldering surface mount devices
Note 7 The specifications given are for a clock frequency (f
deviate from the specified error band over the temperature range but the filter still maintains its amplitude characteristics See application hints
Note 8 Typicals are at 25 C and represent the most likely parametric norm
Note 9 Guaranteed to National’s Average Outgoing Quality Level (AOQL)
Note 10 The cutoff frequency of the filter is defined as the frequency where the magnitude response is 3 01 dB less than the DC gain of the filter
Note 11 The short circuit source current is measured by forcing the output to its maximum positive swing and then shorting that output to the negative supply The
short circuit sink current is measured by forcing the output being tested to its maximum negative voltage and then shorting that output to the positive supply These
are worst case conditions
Note 12 For
g
Note 13 The filter’s magnitude response is tested at the cutoff frequency f
Note 14 The LMF60 is operated with symmetrical supplies and L Sh is tied to GND
Note 15 For simplicity all the logic levels (except for the TTL input logic levels) have been referenced to V
and
Note 16 The nominal ratio of the clock frequency to the low-pass cutoff frequency is internally set to 50-to-1 (LMF60-50) or 100-to-1 (LMF60-100)
e
SCHMITT TRIGGER
V
V
V
V
V
I
I
SOURCE
SINK
2 5V supplies the dynamic range is referenced to 0 849 V
T
T
T
OH
OL
Symbol
T
a
b
a
g
J
2 5V supplies
b
e
V
T
T
g
MIN
b
JA
5V supplies the dynamic range is referenced to 2 62 V
e
to T
78 C W
MAX
Positive Going Input
Threshold Voltage
Negative Going Input
Threshold Voltage
Hysteresis
Logical ‘‘1’’ Voltage
I
Logical ‘‘0’’ Voltage
I
Output Source
Current Pin 11
Output Sink
Current Pin 11
O
O
e b
e b
all other limits T
IN
e
10 mA Pin 11
10 mA Pin 11
) at any pin exceeds the power supply rails (V
(T
Parameter
J Max
b
T
A
b
) i
A
e
JA
e
0V (Note 15) L Sh
or the number given in the absolute ratings whichever is lower For this device T
T
CLK
rms
J
e
) of 500 kHz at
(1 2V peak) where the wideband noise over a 20 kHz bandwidth is typically 75 mV
25 C
rms
V
V
V
V
V
V
V
V
V
V
CLK R to V
V
V
CLK R to V
V
V
(3 7V peak) where the wideband noise over a 20 kHz bandwidth is typically 100 mV For
Conditions
(Continued)
a
a
a
a
a
a
a
a
a
a
a
a
a
a
C
e
e
e
e
e
e
e a
e a
e a
e a
e a
e a
e a
e a
at f
a
5
e
IN k
5V and 250 kHz at
10V
5V
10V
5V
10V
5V
IN
0V unless otherwise specified Boldface limits apply for T
10V
5V
10V
5V
10V
5V
10V
5V
e
V
b
a
b
2 f
or V
C
and at these two additional frequencies
IN l
(Note 8)
V
Typical
g
a
J Max
) the absolute value of current at that pin should be limited
2 5V Above this frequency the cutoff frequency begins to
b
e
i
JA
0V The logic levels will scale accordingly for
and the ambient temperature T
6 1
8 8
3 0
4 3
1 4
3 8
0 7
1 9
2 3
7 4
1 1
3 6
9 1
4 6
0 9
0 4
4 9
1 6
4 9
1 6
(Note 9)
Limits
6 0
8 9
2 9
4 4
1 3
3 9
0 6
2 0
2 1
7 6
0 9
3 8
9 0
4 5
1 0
0 5
3 7
1 2
3 7
1 2
J Max
http
e
A
125 C and the
www national com
The maximum
rms
mA (Min)
mA (Min)
mA (Min)
mA (Min)
(Limits)
V (Max)
V (Max)
V (Max)
V (Max)
V (Max)
V (Max)
V (Max)
V (Max)
V (Min)
V (Min)
V (Min)
V (Min)
V (Min)
V (Min)
V (Min)
V (Min)
Units
g
5V
A