LT1491 Linear Technology, LT1491 Datasheet - Page 9

• Manufacturer Part Number: LT1491
• Description: Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps
• Manufacturer: Linear Technology

APPLICATIONS
Gain
The open-loop gain is almost independent of load when
the output is sourcing current. This optimizes perfor-
SI PLIFIED SCHE ATIC
TYPICAL APPLICATIONS
W
ONE AMPLIFIER
+
R1
30k
2 A
Q5
Q1
Q4
f = 1
5V
V
I
AT V
OUTPUT IS 5kHz SLEW LIMITED TRIANGLE WAVE
S
OUT
= 200 A
100k
100k
2RC
S
Square Wave Oscillator
= 5V
– IN
+IN
= 5V, R = 50k, C = 1nF
U
Q6
P-P
C
0.1 F
WITH 5V SUPPLY
R2
R3
1k
1k
+
–
1/2 LT1490
INFORMATION
U
W
D4
59k
50k
R
1490/91 TA02
U
W
D5
Q9
Q7
D1
V
OUT
Q8
Q10
U
D2
Q11
Q2
Q12
mance in single supply applications where the load is
returned to ground. The typical performance photo of
Open-Loop Gain for various loads shows the details.
Q13
V
IN
R4
40k
Capacitive Loads Greater Than 200pF
Optional Output Compensation for
Q14
R5
40k
+
–
1/2 LT1490
Q15
D3
Q3
Q16
LT1490/LT1491
150
Q17
Q18
0.22 F
Q19
Q20
1490/91 TA04
C
L
Q22
Q21
10,000pF
1490/91 SS
OUT
V
V
+
–
9