LT1366/LT1367
LT1368/LT1369
Typical perForMance characTerisTics
(The data presented here applies to the LT1366/LT1367/LT1368/LT1369 unless otherwise noted.)
Large-Signal Response
(LT1366/LT1367)
Small-Signal Response
(LT1366/LT1367)
THD + Noise vs Frequency
1
0.1
V
V
=
1.ꢀV
P-P
S
= 2V
IN
= 10k
R
L
0V
A
= 1
V
0.01
0.001
A
= –1
V
LT1366 TPC30
LT1366 TPC29
V
=
1ꢀV
2µs/DIV
V
=
1ꢀV
100µs/DIV
S
S
UNITY GAIN
UNITY GAIN
0.01
0.1
1
10
FREQUENCY (kHz)
LT1366 TPC28
applicaTions inForMaTion
Rail-to-Rail Operation
portionsoftheinputcommonmoderange.Lateraldevices
are used in both input stages, eliminating the need for
clamps across the input pins. Each input stage is trimmed
for offset voltage. A complementary output configuration
(Q23 through Q26) is employed to create an output stage
withrail-to-railswing.TheamplifierisfabricatedonLinear
TheLT1366familydiffersfromconventionalopampsinthe
designofboththeinputandoutputstages. Figure1shows
a simplified schematic of the amplifier. The input stage
consists of two differential amplifiers, a PNP stage Q1/Q2
and an NPN stage Q3/Q4, which are active over different
+
V
D7
D6
D4
D5
Q21
Q24
I
1
Q10
Q17
Q11
Q23
Q16
Q5
–
–
V
V
–
V
C1
OUT
–
V
+
+
V
V
+
–
C2
IN
Q1 Q2
+
+
V
V
C
C
D1
D2
IN
Q3 Q4
Q20
Q7
Q14 Q15
Q25
Q8
Q9
Q26
Q22
Q12
+
V
Q6
D8
– 300mV
Q13
Q18
Q19
D3
D7
–
V
LT1366 FO1
Figure 1. LT1366 Simplified Schematic Diagram
1366fb
ꢀꢀ
Linear [ Linear ]
