LTC1164-8CN Linear Technology, LTC1164-8CN Datasheet - Page 6

• Manufacturer Part Number: LTC1164-8CN
• Description: IC FILTR 8TH ORDER LOWPASS 14DIP
• Manufacturer: Linear Technology

Specifications of LTC1164-8CN

• Filter Type: Elliptic Bandpass Switched Capacitor
• Frequency - Cutoff Or Center: 7kHz
• Number Of Filters: 1
• Max-order: 8th
• Voltage - Supply: 4.75 V ~ 16 V, ±2.375 V ~ 8 V
• Mounting Type: Through Hole
• Package / Case: 14-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

PIN
LTC1164-8
AGND (Pins 3, 5): Analog Ground Pins. For dual supply
operation, Pins 3 and 5 (AGND) are connected to an
analog ground plane. For single supply operation, Pins 3
and 5 should be biased at 1/2 of the V
bypassed to the analog ground plane with a 1μF (tanta-
lum or better) capacitor (Figure 2). For optimum gain
linearity and single 5V supply operation, the analog
ground Pins 3 and 5 should be biased at 2V. Under these
conditions the typical output AC swing is 0.5V to 3.5V
(please refer to the THD + Noise vs Input Voltage graph).
The filter performance depends on the quality of the
analog ground. For either a dual or a single supply
operation, an analog ground plane surrounding the pack-
age is necessary. The analog ground plane for the filter
should be connected to any digital ground plane at a
single point.
INVB, INVA, I
Connection Pins. Pin 2 (INVB) is the inverting input on an
op amp. Pin 9 (I
6
TEST CIRCUIT
U
FUNCTIONS
U
OUT
1N4148
, [R (h, l]) (Pins 2, 7, 9, 14): External
OUT
V
S
U
) is the junction of two internal
V
IN
0.1μF
340k
R
IN
1
2
3
4
5
6
7
LTC1164-8
+
supply and be
14
13
12
11
10
9
8
100kHz
f
CLK
0.1μF
resistors. Pin 7 (INVA) is the inverting input of an op amp,
Pin 14 [R (h, l)] is the junction of two internal resistors.
For normal filter operation an external input resistor (R
should be connected to input Pin 2 and the output Pin 9
should be connected to the inverting input of an external
op amp with a feedback resistor (R
should be connected together (Figures 1 and 2). On a
printed circuit board the external connections should be
less than one inch and surrounded by a ground plane.
The input resistor and output op amp with feedback
resistor determine the filter’s gain and dynamic range.
Please refer to the Applications Information section for
more information.
NC (1, 6, 8, 10, 13): NC Pins. Pins 1, 6, 8, 10 and 13 are
not connected to any circuit point on the device and
should be tied to analog ground for dual or single supply
operation.
1N4148
–V
S
2
3
–
+
LT1220
–15V
100pF
15V
61.9k
7
4
6
0.1μF
0.1μF
LTC1164-8 • TC
F
V
). Also Pins 7 and 14
OUT
11648fb
IN
)