Datasheet

LT1228
22
1228fd
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2012
LT 0612 REV D • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATIONS
RF AGC Amplifier (Leveling Loop)
+
–
A3
LT1006
LT1228 • TA20
+
–
CFA
100
Ω
10k
RF INPUT
0.6V
RMS
to 1.3V
RMS
25MHz
300
Ω
–15V
15V
+
–
g
m
470
Ω
10
Ω
0.01µF
10k
0.01µF
15V
–15V
4pF
10k
100k
AMPLITUDE
ADJUST
10k
4.7k
–15V
LT1004
1.2V
10k
OUTPUT
2V
P–P
1N4148’s
COUPLE THERMALLY
3
2
7
5
1
8
4
Inverting Amplifier with DC Output Less Than 5mV Amplitude Modulator
LT1228 • TA21
–
+
+
100µF
–
+
R5
V
–
g
m
3
2
V
+
7
5
4
1
8
6
V
O
CFA
R
F
1k
R
G
1k
V
S
= ±5V, R5 = 3.6k
V
S
= ±15V, R5 = 13.6k
V
OUT
MUST BE LESS THAN
200mV
P–P
FOR LOW OUTPUT OFFSET
BW = 30Hz TO 20MHz
V
IN
INCLUDES DC
LT1228 • TA22
–
+
1k
–
+
10k
–5V
g
m
3
5V
7
5
4
1
8
6
V
OUT
0dBm(230mV) AT
MODULATION = 0V
CFA
R
F
750Ω
R
G
750Ω
+
+
4.7µF
MODULATION
INPUT ≤ 8V
P–P
4.7µF
CARRIER
INPUT
30mV
2
PART NUMBER DESCRIPTION COMMENTS
LT1227 140MHz Current Feedback Amplifier 1100V/µs Slew Rate, 0.01% Differential Gain, 0.03% Differential Phase
LT1251/LT1256 40MHz Video Fader Accurate Linear Gain Control: ±1% Typ, ±3% Max
LT1399 400MHz Current Feedback Amplifier 800V/µs Slew Rate, 80mA Output Current