LT1366/LT1367
LT1368/LT1369
W
U
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
= ±1.5V
S
= 2V
IN P-P
= 10k
R
L
0V
A
= 1
V
0.01
0.001
A
= –1
V
VS = ±15V
UNITY-GAIN
2µs/DIV
VS = ±15V
UNITY-GAIN
100µs/DIV
LT1366 TPC30
LT1366 TPC29
0.01
0.1
1
10
FREQUENCY (kHz)
LT1366 TPC28
U
W U U
APPLICATIONS INFORMATION
Rail-to-Rail Operation
different portions of the input common mode range.
Lateral devices are used in both input stages, eliminating
theneedforclampsacrosstheinputpins.Eachinputstage
is trimmed for offset voltage. A complementary output
configuration (Q23 through Q26) is employed to create an
output stage with rail-to-rail swing. The amplifier is fabri-
The LT1366 family differs from conventional op amps in
the design of both the input and output stages. Figure 1
shows 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
+
V
D7
D6
D4
D5
Q21
Q24
I1
Q10
Q17
Q11
Q23
Q16
Q5
–
–
V
V
–
V
C1
OUT
–
V
+
+
V
V
+
–
C2
V
IN
IN
Q1 Q2
+
+
V
C
C
D1
D2
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
11
Linear [ Linear ]
