LT1783CS6 LINER [Linear Technology], LT1783CS6 Datasheet - Page 8

• Manufacturer Part Number: LT1783CS6
• Description: 1.25MHz, Over-The-Top Micropower, Rail-to-Rail Input and Output Op Amp in SOT-23
• Manufacturer: LINER [Linear Technology]

APPLICATIO S I FOR ATIO
LT1783
Supply Voltage
The positive supply pin of the LT1783 should be bypassed
with a small capacitor (typically 0.1 F) within an inch of
the pin. When driving heavy loads, an additional 4.7 F
electrolytic capacitor should be used. When using split
supplies, the same is true for the negative supply pin.
The LT1783 is protected against reverse battery voltages
up to 18V. In the event a reverse battery condition occurs,
the supply current is less than 1nA.
TYPICAL PERFOR A CE CHARACTERISTICS
8
0.001
0.01
0.1
10
1
0
Total Harmonic Distortion + Noise
vs Output Voltage Amplitude
OUTPUT VOLTAGE AMPLITUDE (V
A
R
V
V
A
V
V
V
S
CM
F
V
S
CM
= R
= –1
= 1.5V
= 1
= 3V, 0V
= 0V
= 1.5V
G
Large-Signal Response
V
A
C
S
V
L
= 100k
1
= 5V
= 1
= 15pF
U
A
R
V
V
V
S
CM
F
A
V
V
U
= –1
= R
= 3V, 0V
2
V
S
CM
= 1.5V
W
= 1
= 1.5V
G
= 0V
= 100k
P-P
1783 G23
)
U
W
3
1783 G26
–6
Open-Loop Gain
U
–5
R
R
R
–4
L
L
L
= 2k
= 10k
= 50k
–3
OUTPUT VOLTAGE (V)
–2
–1
Inputs
The LT1783 has two input stages, NPN and PNP (see the
Simplified Schematic), resulting in three distinct operat-
ing regions as shown in the Input Bias Current vs Common
Mode typical performance curve.
For input voltages about 0.8V or more below V
input stage is active and the input bias current is typically
–40nA. When the input common mode voltage is within
0.5V of the positive rail, the NPN stage is operating and the
0
1
2
3
V
S
= 5V
4
1783 G24
5
Small-Signal Response
V
A
C
S
V
L
6
= 5V
= 1
= 15pF
275
250
225
200
175
150
125
100
75
50
25
0
0
Supply Current vs SHDN Pin
Voltage
0.5
SHUTDOWN PIN VOLTAGE (V)
T
1
A
= 125 C
T
A
1783 G27
= 25 C
1.5
T
A
= –55 C
+
V
S
, the PNP
= 5V, 0V
2
1783 G25
2.5