LT1367 Linear Technology Corporation, LT1367 Datasheet - Page 11

• Manufacturer Part Number: LT1367
• Description: Dual And Quad Precision Rail-to-rail Input And Output Op Amps
• Manufacturer: Linear Technology Corporation

APPLICATIONS
TYPICAL PERFORMANCE CHARACTERISTICS
Rail-to-Rail Operation
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
(The data presented here applies to the LT1366/LT1367/LT1368/LT1369 unless otherwise noted.)
– 300mV
0.001
0.01
0.1
1
IN
IN
V
V
0.01
V
+
+
+
–
–
THD + Noise vs Frequency
Q12
V
V
R
S
IN
L
= 1.5V
= 10k
= 2V
P-P
0.1
FREQUENCY (kHz)
Q6
Q3 Q4
U
A
V
= 1
INFORMATION
V
1
U
–
D1
W
A
LT1366 TPC28
Q5
V
= –1
D3
Q1 Q2
U
10
I1
W
Figure 1. LT1366 Simplified Schematic Diagram
D2
Q7
0V
V
U
+
Large-Signal Response
(LT1366/LT1367)
V
UNITY-GAIN
S
Q10
= 15V
Q8
Q9
Q11
Q13
100 s/DIV
V
different portions of the input common mode range.
Lateral devices 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 with rail-to-rail swing. The amplifier is fabri-
–
C
C
Q14
D7
D4
Q15
LT1366 TPC29
D5
V
+
Q18
Q16
Small-Signal Response
(LT1366/LT1367)
V
UNITY-GAIN
S
= 15V
Q17
Q19
LT1366/LT1367
LT1368/LT1369
Q20
D6
V
V
Q21
Q22
2 s/DIV
+
–
C1
C2
V
V
Q23
Q25
–
+
11
D7
D8
LT1366 FO1
LT1366 TPC30
Q24
Q26
OUT