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LT1228IS8#TR

Description
IC 1 CHANNEL, VIDEO AMPLIFIER, PDSO8, 0.150 INCH, PLASTIC, SOP-8, Audio/Video Amplifier
CategoryAnalog mixed-signal IC    Consumption circuit   
File Size407KB,20 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric Compare View All

LT1228IS8#TR Overview

IC 1 CHANNEL, VIDEO AMPLIFIER, PDSO8, 0.150 INCH, PLASTIC, SOP-8, Audio/Video Amplifier

LT1228IS8#TR Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeSOIC
package instructionSOP,
Contacts8
Reach Compliance Codenot_compliant
ECCN codeEAR99
Commercial integrated circuit typesVIDEO AMPLIFIER
harmonic distortion0.2%
JESD-30 codeR-PDSO-G8
JESD-609 codee0
length4.9 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals8
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height1.752 mm
Maximum supply voltage (Vsup)15 V
Minimum supply voltage (Vsup)2 V
surface mountYES
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width3.899 mm
LT1228
100MHz Current Feedback
Amplifier with DC Gain Control
FEATURES
DESCRIPTIO
Very Fast Transconductance Amplifier
Bandwidth: 75MHz
g
m
= 10
×
I
SET
Low THD: 0.2% at 30mV
RMS
Input
Wide I
SET
Range: 1µA to 1mA
Very Fast Current Feedback Amplifier
Bandwidth: 100MHz
Slew Rate: 1000V/µs
Output Drive Current: 30mA
Differential Gain: 0.04%
Differential Phase: 0.1°
High Input Impedance: 25MΩ, 6pF
Wide Supply Range:
±2V
to
±15V
Inputs Common Mode to Within 1.5V of Supplies
Outputs Swing Within 0.8V of Supplies
Supply Current: 7mA
Available in 8-Lead PDIP and SOIC Packages
The LT
®
1228 makes it easy to electronically control the
gain of signals from DC to video frequencies. The LT1228
implements gain control with a transconductance ampli-
fier (voltage to current) whose gain is proportional to an
externally controlled current. A resistor is typically used to
convert the output current to a voltage, which is then
amplified with a current feedback amplifier. The LT1228
combines both amplifiers into an 8-pin package, and
operates on any supply voltage from 4V (±2V) to 30V
(±15V). A complete differential input, gain controlled
amplifier can be implemented with the LT1228 and just a
few resistors.
The LT1228 transconductance amplifier has a high imped-
ance differential input and a current source output with wide
output voltage compliance. The transconductance, g
m
, is
set by the current that flows into Pin 5, I
SET
. The small signal
g
m
is equal to ten times the value of I
SET
and this relationship
holds over several decades of set current. The voltage at Pin
5 is two diode drops above the negative supply, Pin 4.
The LT1228 current feedback amplifier has very high input
impedance and therefore it is an excellent buffer for the
output of the transconductance amplifier. The current feed-
back amplifier maintains its wide bandwidth over a wide
range of voltage gains making it easy to interface the
transconductance amplifier output to other circuitry. The
current feedback amplifier is designed to drive low imped-
ance loads, such as cables, with excellent linearity at high
frequencies.
Frequency Response
6
3
0
–3
I
SET
= 1mA
V
S
=
±15V
R
L
= 100Ω
APPLICATIO S
Video DC Restore (Clamp) Circuits
Video Differential Input Amplifiers
Video Keyer/Fader Amplifiers
AGC Amplifiers
Tunable Filters
Oscillators
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
15V
R3A
10k
R2A
10k
Differential Input Variable Gain Amp
4.7µF
+
g
m
2
1
4
5
8
I
SET
4.7µF
R4
1.24k
R6
6.19k
R5
10k
GAIN (dB)
+
V
IN
3
+
7
–6
–9
–12
–15
I
SET
= 300µA
+
CFA
6
R
F
470Ω
HIGH INPUT RESISTANCE
EVEN WHEN POWER IS OFF
–18dB
<
GAIN
<
2dB
V
IN
3V
RMS
LT1228 • TA01
V
OUT
–15V
R3
100Ω
R2
100Ω
–18
–21
–24
100k
R1
270Ω
RG
10Ω
U
I
SET
= 100µA
1M
10M
100M
LT1228 • TA02
U
U
+
FREQUENCY (Hz)
1228fc
1

LT1228IS8#TR Related Products

LT1228IS8#TR LT1228CJ8#PBF LT1228MJ8#PBF
Description IC 1 CHANNEL, VIDEO AMPLIFIER, PDSO8, 0.150 INCH, PLASTIC, SOP-8, Audio/Video Amplifier IC 1 CHANNEL, VIDEO AMPLIFIER, CDIP8, 0.300 INCH, HERMETIC SEALED, LEAD FREE, CERAMIC, DIP-8, Audio/Video Amplifier IC 1 CHANNEL, VIDEO AMPLIFIER, CDIP8, 0.300 INCH, HERMETIC SEALED, LEAD FREE, CERAMIC, DIP-8, Audio/Video Amplifier
Is it Rohs certified? incompatible conform to conform to
Maker Linear ( ADI ) Linear ( ADI ) Linear ( ADI )
Parts packaging code SOIC DIP DIP
package instruction SOP, DIP, 0.300 INCH, HERMETIC SEALED, LEAD FREE, CERAMIC, DIP-8
Contacts 8 8 8
Reach Compliance Code not_compliant unknown unknown
ECCN code EAR99 EAR99 EAR99
Commercial integrated circuit types VIDEO AMPLIFIER VIDEO AMPLIFIER VIDEO AMPLIFIER
harmonic distortion 0.2% 0.2% 0.2%
JESD-30 code R-PDSO-G8 R-CDIP-T8 R-CDIP-T8
Number of channels 1 1 1
Number of functions 1 1 1
Number of terminals 8 8 8
Maximum operating temperature 85 °C 70 °C 125 °C
Minimum operating temperature -40 °C - -55 °C
Package body material PLASTIC/EPOXY CERAMIC, METAL-SEALED COFIRED CERAMIC, METAL-SEALED COFIRED
encapsulated code SOP DIP DIP
Package shape RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE IN-LINE IN-LINE
Peak Reflow Temperature (Celsius) 235 NOT SPECIFIED NOT SPECIFIED
Certification status Not Qualified Not Qualified Not Qualified
Maximum seat height 1.752 mm 5.08 mm 5.08 mm
Maximum supply voltage (Vsup) 15 V 15 V 15 V
Minimum supply voltage (Vsup) 2 V 2 V 2 V
surface mount YES NO NO
Temperature level INDUSTRIAL COMMERCIAL MILITARY
Terminal form GULL WING THROUGH-HOLE THROUGH-HOLE
Terminal pitch 1.27 mm 2.54 mm 2.54 mm
Terminal location DUAL DUAL DUAL
Maximum time at peak reflow temperature 20 NOT SPECIFIED NOT SPECIFIED
width 3.899 mm 7.62 mm 7.62 mm

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