LTC1565-31
PIN FUNCTIONS
V
–
, V
+
(Pins 4, 6):
Power Supply Pins. For a single 5V
supply (Pin 4 grounded), a quality 0.1µF ceramic bypass
capacitor is required from the positive supply pin (Pin 6)
to the negative supply pin (Pin 4). The bypass should be
as close as possible to the IC. For dual supply applications
(Pin 3 is grounded), bypass Pin 6 to Pin 3 and Pin 4 to Pin
3 with a quality 0.1µF ceramic capacitor.
The maximum voltage difference between the ground pin
(Pin 3) and the positive supply pin (Pin 6) should not
exceed 5.5V.
SHDN (Pin 5):
Shutdown. When the Pin 5 voltage is low,
the LTC1565-31 goes into the current saving shutdown
mode. Pin 5 has a 4µA pull-up current. Leaving Pin 5 open
will place the LTC1565-31 in its normal operating mode.
– OUT, + OUT (Pins 7, 8):
Output Pins. Pins 7 and 8 are the
filter differential output. Each pin can drive 1kΩ or 300pF
loads. The common mode voltage at the output pins is the
same as the voltage at Pin 3.
BLOCK DIAGRA
+IN 1
–IN 2
GND 3
5k
SHUTDOWN
SWITCH
V
+
V
–
4µA
SHUTDOWN
V
–
4
W
U
U
U
+
8 +OUT
–
+
R
7th ORDER
LINEAR
PHASE
FILTER
NETWORK
OUTPUT
BUFFER
R
–
+
V
+
SHUTDOWN
SWITCH
–
OUTPUT
BUFFER
7 –OUT
INPUT BUFFERS
WITH COMMON MODE
TRANSLATION CIRCUIT
~1M
5k
6 V
+
~1M
5
SHDN
1565-31 BD
5
LINER [ LINEAR TECHNOLOGY ]
