LTC1562CG#PBF Linear Technology, LTC1562CG#PBF Datasheet - Page 6

• Manufacturer Part Number: LTC1562CG#PBF
• Description: IC FILTER UNIV RC QUAD LN 20SSOP
• Manufacturer: Linear Technology

Specifications of LTC1562CG#PBF

• Filter Type: Universal, Continuous-Time
• Frequency - Cutoff Or Center: 150kHz
• Number Of Filters: 4
• Max-order: 8th
• Voltage - Supply: 4.75 V ~ 10.5 V, ±4.75 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIN
BLOCK DIAGRA
LTC1562
INV A, INV B, INV C, INV D: Each of the INV pins is a virtual-
ground summing point for the corresponding 2nd order
section. For each section, external components Z
R
described further in the Applications Information. Note
that the INV pins are sensitive internal nodes of the filter
and will readily receive any unintended signals that are
capacitively coupled into them. Capacitance to the INV
nodes will also affect the frequency response of the filter
sections. For these reasons, printed circuit connections to
the INV pins must be kept as short as possible, less than
one inch (2.5cm) total and surrounded by a ground plane.
V1 A, V1 B, V1 C, V1 D: Output Pins. Provide a bandpass,
highpass or other response depending on external cir-
cuitry (see Applications Information section). Each V1 pin
also connects to the R
6
Q
U
SHDN
connect to the INV pin as shown in Figure 3 and
V
V
+
–
FUNCTIONS
U
V
V
+
–
SHUTDOWN
SWITCH
SHUTDOWN
SWITCH
R
R
U
Q
resistor of the corresponding 2nd
W
AGND
Overall Block Diagram Showing Four 3-Terminal 2nd Order Sections
D
A
INV
INV
–
–
+
+
IN
C
C
, R2,
V1
V1
order filter section (see Figure 3 and Applications Informa-
tion). Each output is designed to drive a nominal net load
of 5k and 30pF, which includes the loading due to the
external R
outputs are loaded as lightly as possible. Some earlier
literature refers to these outputs as “BP” rather than V1.
V2 A, V2 B, V2 C, V2 D: Output Pins. Provide a lowpass,
bandpass or other response depending on external cir-
cuitry (see Applications Information section). Each V2 pin
also connects to the R2 resistor of the corresponding 2nd
order filter section (see Figure 3 and Applications Informa-
tion). Each output is designed to drive a nominal net load
of 5k and 30pF, which includes the loading due to the
external R2. Distortion performance improves when the
outputs are loaded as lightly as possible. Some earlier
literature refers to these outputs as “LP” rather than V2.
2ND ORDER SECTIONS
Q
V2
V2
. Distortion performance improves when the
B
C
INV
INV
–
–
+
+
C
C
V1
V1
V2
V2
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