lt6600cs8-2.5-pbf Linear Technology Corporation, lt6600cs8-2.5-pbf Datasheet - Page 6

• Manufacturer Part Number: lt6600cs8-2.5-pbf
• Description: Very Low Noise, Differential Amplifier And 15mhz Lowpass Filter
• Manufacturer: Linear Technology Corporation

PI FU CTIO S
BLOCK DIAGRA
LT6600-15
IN
to either or both input pins through identical external
resistors, R
differential outputs is 536Ω/R
V
for the 2nd Filter Stage. Its value programs the common
mode voltage of the differential output of the filter. Pin 2 is
a high impedance input, which can be driven from an
external voltage reference, or Pin 2 can be tied to Pin 7 on
the PC board. Pin 2 should be bypassed with a 0.01µF
ceramic capacitor unless it is connected to a ground plane.
V
3.3V or 5V supply (Pin 6 grounded) a quality 0.1µF
ceramic bypass capacitor is required from the positive
supply pin (Pin 3) to the negative supply pin (Pin 6). The
bypass should be as close as possible to the IC. For dual
6
OCM
+
–
U
and V
and IN
(Pin 2): Is the DC Common Mode Reference Voltage
–
U
+
(Pins 3, 6): Power Supply Pins. For a single
IN
(Pins 1, 8): Input Pins. Signals can be applied
. The DC gain from differential inputs to the
U
V
V
IN
IN
+
–
W
R
R
IN
IN
IN
.
1
8
IN
IN
+
–
+
V
–
536Ω
536Ω
OCM
OP AMP
–
+
V
V
MID
OCM
7
2
200Ω
200Ω
V
V
+
–
11k
11k
supply applications, bypass Pin 3 to ground and Pin 6 to
ground with a quality 0.1µF ceramic capacitor.
OUT
the filter differential outputs. Each pin can drive a 100Ω
and/or 50pF load.
V
supply, see block diagram. For single supply operation,
the V
ceramic capacitor to Pin 6. For dual supply operation, Pin
7 can be bypassed or connected to a high quality DC
ground. A ground plane should be used. A poor ground
will increase noise and distortion. Pin 7 sets the output
common mode voltage of the 1st stage of the filter. It has
a 5.5kΩ impedance, and it can be overridden with an
external low impedance voltage source.
MID
+
V
V
3
6
(Pin 7): The V
MID
–
+
and OUT
+ –
V
–
pin should be bypassed with a quality 0.01µF
200Ω
200Ω
OCM
PROPRIETARY
FILTER STAGE
+
LOWPASS
–
(Pins 4, 5): Output Pins. Pins 4 and 5 are
OUT
OUT
MID
4
5
660015 BD
–
+
pin is internally biased at mid-
660015f