LT6600IS8-10#TRPBF Linear Technology, LT6600IS8-10#TRPBF Datasheet - Page 10

• Manufacturer Part Number: LT6600IS8-10#TRPBF
• Description: IC AMP DIFF LP FLTR 10MHZ 8-SOIC
• Manufacturer: Linear Technology

Specifications of LT6600IS8-10#TRPBF

• Amplifier Type: Differential
• Number Of Circuits: 1
• Output Type: Differential
• Current - Input Bias: 40µA
• Voltage - Input Offset: 8000µV
• Current - Supply: 36mA
• 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)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output / Channel: -
• -3db Bandwidth: -
• Slew Rate: -
• Gain Bandwidth Product: -

APPLICATIONS INFORMATION
LT6600-10
Differential and Common Mode Voltage Ranges
The differential amplifi ers inside the LT6600-10 contain
circuitry to limit the maximum peak-to-peak differential
voltage through the fi lter. This limiting function prevents
excessive power dissipation in the internal circuitry
and provides output short-circuit protection. The limiting
function begins to take effect at output signal levels above
2V
illustrated in Figure 6; the LTC6600-10 was confi gured with
unity passband gain and the input of the fi lter was driven
with a 1MHz signal. Because this voltage limiting takes
place well before the output stage of the fi lter reaches the
supply rails, the input/output behavior of the IC shown
in Figure 6 is relatively independent of the power supply
voltage.
The two amplifi ers inside the LT6600-10 have independent
control of their output common mode voltage (see the
Block Diagram section). The following guidelines will
optimize the performance of the fi lter for single-supply
operation.
V
higher capacitor. V
source, provided it remains at least 1.5V above V
least 1.5V below V
Figure 5, present the output of the LT6600-10 with a 1600Ω
differential load, or the equivalent of 800Ω to ground at each
output. The impedance seen by the network analyzer input
is still 50Ω, reducing refl ections in the cabling between
the transformer and analyzer input.
10
NETWORK
ANALYZER
MID
SOURCE
P-P
50Ω
must be bypassed to an AC ground with a 0.01μF or
and it becomes noticeable above 3.5V
53.6Ω
COILCRAFT
TTWB-1010
1:1
Figure 5. (S8 Pin Numbers)
MID
+
. An internal resistor divider sets the
388Ω
388Ω
can be driven from a low impedance
1
7
2
8
LT6600-10
+
–
–2.5V
3
6
2.5V
+
–
0.1μF
0.1μF
4
5
402Ω
402Ω
COILCRAFT
TTWB-16A
4:1
P-P
. This is
NETWORK
ANALYZER
–
INPUT
and at
6600 F05
50Ω
V
common mode output voltage is required, connect V
to a voltage source or resistor network. For 3V and 3.3V
supplies the voltage at V
the mid-supply level. For example, voltage (V
on a single 3.3V supply. For power supply voltages higher
than 3.3V the voltage at V
The voltage on V
the voltage on V
more than 2V above the voltage on V
impedance input.
The LT6600-10 was designed to process a variety of input
signals including signals centered around the mid-supply
voltage and signals that swing between ground and a
positive voltage in a single-supply system (Figure 1).
The range of allowable input common mode voltage (the
average of V
the power supply level and gain setting (see the Electrical
Characteristics section).
Common Mode DC Currents
In applications like Figure 1 and Figure 3 where the
LT6600-10 not only provides lowpass fi ltering but also level
shifts the common mode voltage of the input signal, DC
voltage of V
matched, their absolute value can vary by ±20%. This
should be taken into consideration when connecting an
external resistor network to alter the voltage of V
OCM
can be shorted to V
–100
–120
–20
–40
–60
–80
20
0
MID
IN
0
COMPRESSION POINTS
+
1dB PASSBAND GAIN
. While the internal 11k resistors are well
2ND HARMONIC
3RD HARMONIC
MID
and V
OCM
1
. The voltage on V
1MHz INPUT LEVEL (V
3RD HARMONIC
should not be more than 1V below
IN
85°C
2
25°C
OCM
OCM
–
Figure 6
MID
in Figure 1) is determined by
3
85°C
must be less than or equal to
can be set above mid-supply.
for simplicity. If a different
1MHz 85°C
2ND HARMONIC
25°C
4
P-P
1MHz 25°C
)
MID
5
OCM
6600 F06
. V
6
should not be
OCM
OCM
) ≤1.65V
is a high
MID
66001fd
.
OCM