LT6600IS8-5#PBF Linear Technology, LT6600IS8-5#PBF Datasheet - Page 10

• Manufacturer Part Number: LT6600IS8-5#PBF
• Description: IC AMP DIFF LP FLTR 5MHZ 8-SOIC
• Manufacturer: Linear Technology

Specifications of LT6600IS8-5#PBF

• Amplifier Type: Differential
• Number Of Circuits: 1
• Output Type: Differential
• Current - Input Bias: 30µA
• Voltage - Input Offset: 8000µV
• Current - Supply: 30mA
• Voltage - Supply, Single/dual (±): 3 V ~ 11 V, ±1.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• No. Of Amplifiers: 1
• Input Offset Voltage: 35mV
• Gain Db Max: 11.5dB
• Bandwidth: 5MHz
• Supply Voltage Range: 3V To 11V
• Supply Current: 30mA
• Amplifier Case Style: SOIC
• No. Of Pins: 8
• Rohs Compliant: Yes
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 8
• Package Type: SOIC N
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output / Channel: -
• -3db Bandwidth: -
• Slew Rate: -
• Gain Bandwidth Product: -
• Lead Free Status / Rohs Status: Compliant

APPLICATIONS INFORMATION
LT6600-5
Example: With the IC removed and the 25Ω resistors
grounded, measure the total integrated noise (e
spectrum analyzer from 10kHz to 5MHz. With the IC in-
serted, the signal source (V
resistors grounded, measure the total integrated noise
out of the fi lter (e
set the frequency to 1MHz and adjust the amplitude until
V
V
compute the input referred integrated noise (e
Table 1 lists the typical input referred integrated noise for
various values of R
Figure 8 is plot of the noise spectral density as a function
of frequency for an LT6600-5 with R
using the fi xture of Figure 7 (the instrument noise has
been subtracted from the results).
Table 1. Noise Performance
The noise at each output is comprised of a differential
component and a common mode component. Using a
transformer or combiner to convert the differential outputs
to single-ended signal rejects the common mode noise and
gives a true measure of the S/N achievable in the system.
10
IN
OUT
PASSBAND
GAIN (V/V)
e
measures 100mV
IN
, and compute the passband gain A = V
=
4
2
1
(e
V
IN
O
)
2
R
R
A
IN
IN
200Ω
402Ω
806Ω
– (e
R
O
IN
IN
). With the signal source connected,
1
7
2
8
S
.
–
+
P-P
LT6600-5
–2.5V
)
2.5V
6
3
2
INTEGRATED NOISE
+
–
. Measure the output amplitude,
INPUT REFERRED
Figure 7
10kHz TO 10MHz
0.1μF
0.1μF
4
5
IN
24μV
38μV
69μV
) disconnected, and the input
RMS
RMS
RMS
25Ω
25Ω
TTWB-1010
COILCRAFT
IN
1:1
= 806Ω and 200Ω
INPUT REFERRED
NOISE dBm/Hz
OUT
SPECTRUM
ANALYZER
INPUT
IN
–149
–145
–140
/V
66005 F07
50Ω
S
) as:
IN
) of the
. Now
Conversely, if each output is measured individually and the
noise power added together, the resulting calculated noise
level will be higher than the true differential noise.
Power Dissipation
The LT6600-5 amplifi ers combine high speed with large-
signal currents in a small package. There is a need to
ensure that the dies’s junction temperature does not
exceed 150°C. The LT6600-5 package has Pin 6 fused
to the lead frame to enhance thermal conduction when
connecting to a ground plane or a large metal trace. Metal
trace and plated through-holes can be used to spread the
heat generated by the device to the backside of the PC
board. For example, on a 3/32" FR-4 board with 2oz cop-
per, a total of 660 square millimeters connected to Pin 6
of the LT6600-5 (330 square millimeters on each side of
the PC board) will result in a thermal resistance, θ
about 85°C/W. Without extra metal trace connected to the
V
be around 105°C/W. Table 2 can be used as a guide when
considering thermal resistance.
Table 2. LT6600-5 SO-8 Package Thermal Resistance
TOPSIDE
–
(mm
1100
pin to provide a heat sink, the thermal resistance will
330
35
35
0
COPPER AREA
2
)
BACKSIDE
45
40
35
30
25
20
15
10
(mm
5
0
1100
0.01
330
35
0
0
2
)
INTEGRATED NOISE, GAIN = 1X
INTEGRATED NOISE, GAIN = 4X
NOISE DENSITY, GAIN = 1X
NOISE DENSITY, GAIN = 4X
0.1
BOARD AREA
FREQUENCY (MHz)
(mm
Figure 8
2500
2500
2500
2500
2500
2
)
10
(JUNCTION-TO-AMBIENT)
THERMAL RESISTANCE
66005 G08
100
100°C/W
105°C/W
65°C/W
85°C/W
95°C/W
90
80
70
60
50
40
30
20
10
0
JA
66005fb
, of