LT1490A LINER [Linear Technology], LT1490A Datasheet - Page 9

• Manufacturer Part Number: LT1490A
• Description: Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp
• Manufacturer: LINER [Linear Technology]

SI PLIFIED SCHE ATIC
APPLICATIO S I FOR ATIO
Gain
The open-loop gain is almost independent of load when
the output is sourcing current. This optimizes performance
TYPICAL APPLICATIO S
W
ONE AMPLIFIER
+
R1
30k
2 A
Q5
Q1
Q4
f = 1
V
I
AT V
OUTPUT IS 5kHz SLEW LIMITED TRIANGLE WAVE
5V
S
OUT
= 200 A
– IN
+IN
100k
100k
2RC
S
Square Wave Oscillator
= 5V
= 5V, R = 50k, C = 1nF
U
Q6
P-P
C
0.1 F
WITH 5V SUPPLY
R2
1k
R3
1k
1/2 LT1490A
–
+
U
W
D4
59k
50k
R
1490A TA02
U
W
D5
Q9
Q7
D1
V
OUT
Q8
Q10
U
D2
Q11
Q2
Q12
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
Optional Output Compensation for
Capacitive Loads Greater Than 200pF
Q14
R5
40k
1/2 LT1490A
+
–
Q15
D3
Q16
Q3
150
Q17
Q18
0.22 F
Q19
Q20
C
LT1490A
1490A TA04
L
Q22
Q21
10,000pF
1490A SS
V
OUT
V
+
–
9