LT1227CS8#TRPBF Linear Technology, LT1227CS8#TRPBF Datasheet - Page 10
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LT1227CS8#TRPBF
Manufacturer Part Number
LT1227CS8#TRPBF
Description
IC VIDEO CURRNT FEEDBK AMP 8SOIC
Manufacturer
Linear Technology
Datasheet
1.LT1227CN8PBF.pdf
(12 pages)
Specifications of LT1227CS8#TRPBF
Applications
Current Feedback
Number Of Circuits
1
-3db Bandwidth
140MHz
Slew Rate
1100 V/µs
Current - Supply
10mA
Current - Output / Channel
60mA
Voltage - Supply, Single/dual (±)
4 V ~ 30 V, ±2 V ~ 15 V
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
LT1227
MUX Amplifier
The shutdown function can be effectively used to con-
struct a MUX amplifier. A two-channel version is shown,
but more inputs could be added with suitable logic. By
configuring each amplifier as a unity-gain follower, there
is no loading by the feedback network when the amplifier
is off. The open drains of the 74C906 buffers are used to
interface the 5V logic to the shutdown pin. Feedthrough
from the unselected input to the output is –70dB at
10MHz. The differential voltage between MUX inputs V
and V
device, this voltage should be less than 5V to avoid
turning on the clamp diodes discussed previously. If the
inputs are sinusoidal having a zero DC level, this implies
that the amplitude of each input should be less than
5V
high until the output level exceeds approximately 6V
10MHz, this sets the maximum usable output level. Switch-
ing time between inputs is about 4 s without an external
pullup. Adding a 10k pullup resistor from each shutdown
pin to V
increase the positive supply current in shutdown by 1.5mA.
TYPICAL
10
P-P
SELECT
INPUT
V
. The output impedance of the off amplifier remains
OUT
IN2
+
will reduce the switching time to 2 s but will
appears across the inputs of the shutdown
A
PPLICATI
V
IN1
MUX Output
= 1V
P-P
, V
O
IN2
U
= 0V
S
TA03
P-P
IN1
at
SELECT
INPUT
V
V
V
V
IN1
OUT
IN2
IN
= 1
–40
–50
–60
–70
–80
–90
1
MUX Input Crosstalk vs Frequency
5V
74HC04
MUX Amplifier
FREQUENCY (MHz)
1.5k
1.5k
+
–
+
–
–15V
LT1227
–15V
LT1227
15V
15V
5V
5V
10
74C906
74C906
S/D
S/D
1227 TA04
LT1227 TA05
100
V
OUT