LT1395CS6#TR Linear Technology, LT1395CS6#TR Datasheet - Page 20

• Manufacturer Part Number: LT1395CS6#TR
• Description: IC AMP CURR FEEDBACK SGL SOT23-6
• Manufacturer: Linear Technology

Specifications of LT1395CS6#TR

• Amplifier Type: Current Feedback
• Number Of Circuits: 1
• Slew Rate: 800 V/µs
• -3db Bandwidth: 400MHz
• Current - Input Bias: 10µA
• Voltage - Input Offset: 1000µV
• Current - Supply: 4.6mA
• Current - Output / Channel: 80mA
• Voltage - Supply, Single/dual (±): 4 V ~ 12 V, ±2 V ~ 6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-6
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Output Type: -
• Gain Bandwidth Product: -

LT1395/LT1396/LT1397
TYPICAL APPLICATION
Single Supply RGB Video Amplifi er
The LT1395 can be used with a single supply voltage of
6V or more to drive ground-referenced RGB video. In
Figure 6, two 1N4148 diodes D1 and D2 have been placed
in series with the output of the LT1395 amplifi er A1 but
within the feedback loop formed by resistor R8. These
diodes effectively level-shift A1’s output downward by 2
diodes, allowing the circuit output to swing to ground.
Amplifi er A1 is used in a positive gain confi guration.
The feedback resistor R8 is 255Ω. The gain resistor
is created from the parallel combination of R6 and R7,
giving a Thevenin equivalent 63.5Ω connected to 3.75V.
This gives an AC gain of + 5 from the noninverting input
of amplifi er A1 to the cathode of D2. However, the video
input is also attenuated before arriving at A1’s positive
RELATED PARTS
PART NUMBER
LT1227/LT1229/LT1230
LT1252/LT1253/LT1254
LT1363/LT1364/LT1365
LT1398/LT1399
LT1675
LT6559
20
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
DESCRIPTION
140MHz Single/Dual/Quad Current Feedback Amplifi er
Low Cost Video Amplifi ers
70MHz Single/Dual/Quad Op Amps
Dual/Triple Current Feedback Amplifi ers
Triple 2:1 Buffered Video Multiplexer
Low Cost Triple Current Feedback Amplifi ers
V
IN
Figure 6. Single Supply RGB Video Amplifi er (1 of 4 Channels)
●
www.linear.com
R1
1000Ω
R2
1300Ω
R3
160Ω
R4
75Ω
R5
2.32Ω
5V
R6
84.5Ω
R7
255Ω
+
–
6V TO 12V
LT1395
A1
input. Assuming a 75Ω source impedance for the signal
driving V
positive input is 3V + 0.4V
of 714Ω. The combination of these two inputs gives an
output at the cathode of D2 of 2 • V
DC offset. The 75Ω back termination resistor R9 halves
the signal again such that V
sion of V
It is important to note that the 4.7μF capacitor C1 has
been added to provide enough current to maintain the
voltage drop across diodes D1 and D2 when the circuit
output drops low enough that the diodes might other-
wise turn off. This means that this circuit works fi ne for
continuous video input, but will require that C1 charge
up after a period of inactivity at the input.
V
S
255Ω
COMMENTS
R8
1100V/μs Slew Rate, Single Adds Shutdown Pin
Single, Dual and Quad 100MHz Current Feedback Amplifi ers
1000V/μs Slew Rate, Voltage Feedback
300MHz Bandwidth, 0.1dB Flatness > 150MHz with Shutdown
2.5ns Switching Time, 250MHz Bandwidth
300MHz Bandwidth, Specifi ed at +5V and ±5V, 3mm × 3mm
QFN Package
IN
1N4148
IN
D1
, the Thevenin equivalent signal arriving at A1’s
.
4.7μF
C1
1N4148
1395/6/7 TA03
D2
75Ω
R9
V
OUT
IN
© LINEAR TECHNOLOGY CORPORATION 1999
, with a source impedance
OUT
equals a buffered ver-
LT 0709 REV D • PRINTED IN USA
IN
with no additional
139567fd