LT6600CS8-20#TR Linear Technology, LT6600CS8-20#TR Datasheet - Page 7

• Manufacturer Part Number: LT6600CS8-20#TR
• Description: IC AMP DIFF LP FLTR 20MHZ 8-SOIC
• Manufacturer: Linear Technology

Specifications of LT6600CS8-20#TR

• Amplifier Type: Differential
• Number Of Circuits: 1
• Output Type: Differential
• Current - Input Bias: 50µA
• Voltage - Input Offset: 10000µV
• Current - Supply: 46mA
• Voltage - Supply, Single/dual (±): 3 V ~ 11 V, ±1.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output / Channel: -
• -3db Bandwidth: -
• Slew Rate: -
• Gain Bandwidth Product: -

APPLICATIONS INFORMATION
Interfacing to the LT6600-20
The LT6600-20 requires two equal external resistors, R
to set the differential gain to 402Ω/R
fi lter are the voltages V
external components, Figure 1. The difference between
V
age of V
Similarly, the voltages V
Pins 4 and 5 of the LT6600-20 are the fi lter outputs. The
difference between V
output voltage. The average of V
common mode output voltage.
Figure 1 illustrates the LT6600-20 operating with a single
3.3V supply and unity passband gain; the input signal is
DC coupled. The common mode input voltage is 0.5V, and
the differential input voltage is 2V
IN
+
and V
IN
+
IN
and V
–
is the differential input voltage. The aver-
–1
2
1
0
3
2
1
0
3
2
1
0
IN
V
V
V
–
500mV
is the common mode input voltage.
V
V
OUT
IN
IN
+
–
P-P
IN
+
OUT
+
V
(DIFF)
IN
and V
V
and V
V
IN
+
IN
+
+
–
and V
P-P
OUT
IN
OUT
–
t
t
. The common mode
IN
–
presented to these
+
t
OUT
. The inputs to the
is the differential
and V
V
V
V
V
IN
IN
IN
IN
V
–
–
+
IN
–
+
+
appearing at
402Ω
402Ω
0.1μF
0.1μF
OUT
62pF
100Ω
62pF
100Ω
0.01μF
–
402Ω
402Ω
0.01μF
is the
0.01μF
IN
+
–
1
7
2
8
Figure 1
Figure 2
Figure 3
,
1
7
2
8
LT6600-20
2V
–
+
3
3.3V
6
–
LT6600-20
+
3
6
1
7
2
8
5V
output voltage is 1.65V, and the differential output voltage
is 2V
output voltage is determined by the voltage at Pin 2. Since
Pin 2 is shorted to Pin 7, the output common mode is the
mid-supply voltage. In addition, the common mode input
voltage can be equal to the mid-supply voltage of Pin 7
(see the Distortion vs Input Common Mode Level graphs
in the Typical Performance Characteristics section).
Figure 2 shows how to AC couple signals into the
LT6600-20. In this instance, the input is a single-ended
signal. AC coupling allows the processing of single-ended
or differential signals with arbitrary common mode levels.
The 0.1μF coupling capacitor and the 402Ω gain setting
resistor form a high pass fi lter, attenuating signals below
4kHz. Larger values of coupling capacitors will proportion-
ally reduce this highpass 3dB frequency.
+
–
0.1μF
+
–
LT6600-20
+
–
0.1μF
4
5
3
3.3V
4
6
5
P-P
+
–
0.1μF
4
5
for frequencies below 20MHz. The common mode
V
V
OUT
OUT
V
V
OUT
OUT
+
–
+
–
V
V
OUT
OUT
3
2
1
0
+
–
3
2
1
0
V
V
3
2
1
0
V
V
V
V
OUT
V
OUT
OUT
OUT
+
–
V
V
+
–
66002 F01
OUT
OUT
66002 F03
LT6600-20
+
–
66002 F02
t
t
66002fb
7