tlc272
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AVD
TA = 25°C
RL = 10 kΩ
VDD = 10 V
Phase Shift
150
°
120
°
90
°
60
°
30
°
0
°
180
°
10 6
10 5
10 4
10 3
10 2
101
1
1 M
100 k
10 k
1 k
100
0.1
10 M
f – Frequency – Hz
10
10 7
LARGE-SIGNAL DIFFERENTIAL VOLTAGE
AMPLIFICATION AND PHASE SHIFT
vs
FREQUENCY
A
VD
–
Large-Signal Differential
ÁÁ
ÁÁ
VD
V
oltage Amplification
Figure 33
Figure 34
45
°
See Figure 3
VI = 10 mV
TA = 25°C
CL = 20 pF
51
°
49
°
47
°
14
12
10
8
6
4
2
16
53
°
VDD – Supply Voltage – V
m
–
Phase Margin
0
PHASE MARGIN
vs
SUPPLY VOLTAGE
mφ
48
°
46
°
52
°
50
°
Figure 35
PHASE MARGIN
vs
FREE-AIR TEMPERATURE
TA – Free-Air Temperature – °C
See Figure 3
VI = 10 mV
CL = 20 pF
VDD = 5 V
48
°
46
°
44
°
42
°
100
75
50
25
0
–25
–50
40
°
125
50
°
–75
m
–
Phase Margin
mφ
† Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
TLC272, TLC272A, TLC272B, TLC272Y, TLC277
LinCMOS
PRECISION DUAL OPERATIONAL AMPLIFIERS
SLOS091E – OCTOBER 1987 – REVISED FEBRUARY 2002
28
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 36
VDD = 5 V
TA = 25°C
VI = 10 mV
See Figure 3
45
°
40
°
35
°
30
°
80
60
40
20
25
°
100
50
°
CL – Capacitive Load – pF
0
PHASE MARGIN
vs
CAPACITIVE LOAD
m
–
Phase Margin
mφ
10
30
50
70
90
Figure 37
VN
–
Equivalent Input Noise V
oltage
–
See Figure 2
RS = 20 Ω
TA = 25°C
VDD = 5 V
100
10
300
200
100
0
1000
400
f – Frequency – Hz
1
EQUIVALENT INPUT NOISE VOLTAGE
vs
FREQUENCY
nV/
Hz
V
n
TLC272, TLC272A, TLC272B, TLC272Y, TLC277
LinCMOS
PRECISION DUAL OPERATIONAL AMPLIFIERS
SLOS091E – OCTOBER 1987 – REVISED FEBRUARY 2002
29
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
APPLICATION INFORMATION
single-supply operation
While the TLC272 and TLC277 perform well using dual power supplies (also called balanced or split supplies),
the design is optimized for single-supply operation. This design includes an input common-mode voltage range
that encompasses ground as well as an output voltage range that pulls down to ground. The supply voltage
range extends down to 3 V (C-suffix types), thus allowing operation with supply levels commonly available for
TTL and HCMOS; however, for maximum dynamic range, 16-V single-supply operation is recommended.
Many single-supply applications require that a voltage be applied to one input to establish a reference level that
is above ground. A resistive voltage divider is usually sufficient to establish this reference level (see Figure 38).
The low input bias current of the TLC272 and TLC277 permits the use of very large resistive values to implement
the voltage divider, thus minimizing power consumption.