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TS507
Output
1
SOT23-5
SO-8
High precision rail-to-rail operational amplifier
Pin connections (top view)
Datasheet
-
production data
Applications
• Battery-powered applications
• Portable devices
• Signal conditioning
• Medical instrumentation
Description
The TS507 is a high performance rail-to-rail input/output amplifier with very low offset voltage.
This amplifier uses a new trimming technique that yields ultra low offset voltages without any need for external zeroing.
The circuit offers very stable electrical characteristics over the entire supply voltage range, and is particularly intended for automotive and industrial applications.
The TS507 is housed in the space-saving 5-pin
SOT23 package, making it well suited for batterypowered systems. This micropackage simplifies the PC board design because of its ability to be placed in small spaces (external dimensions are
2.8 mm x 2.9 mm).
Features
• Ultra low offset voltage: 25 µV typ, 100 µV max
• Rail-to-rail input/output voltage swing
• Operates from 2.7 V to 5.5 V
• High speed: 1.9 MHz
• 45° phase margin with 100 pF
• Low consumption: 0.8 mA at 2.7 V
• Very large signal voltage gain: 131 dB
• High-power supply rejection ratio: 105 dB
• Very high ESD protection 5kV (HBM)
• Latchup immunity
• Available in SOT23-5 micropackage
• Automotive qualification
March 2013
This is information on a product in full production.
DocID10958 Rev 6 1/20
www.st.com
20
Contents
Contents
TS507
Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3
Out-of-the-loop compensation technique . . . . . . . . . . . . . . . . . . . . . . . . . 15
In-the-loop-compensation technique . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
SOT23-5 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2/20 DocID10958 Rev 6
TS507
1
Absolute maximum ratings and operating conditions
Absolute maximum ratings and operating conditions
Symbol
V
CC
V id
V in
T stg
R thja
R thjc
T j
ESD
Table 1. Absolute maximum ratings (AMR)
Parameter Value
Supply voltage
(1)
Differential input voltage
(2)
Input voltage
(3)
Storage temperature
Thermal resistance junction to ambient
(4)(5)
SOT23-5
SO-8
Thermal resistance junction to case
SOT23-5
SO-8
Maximum junction temperature
HBM: human body model
(6)
MM: machine model
(7)
CDM: charged device model
(8)
Latchup immunity
6
±2.5
V
DD
-0.3 to V
CC
+0.3
-65 to +150
250
125
81
40
150
5
300
2 class A
Unit
V
°C
°C/W
1. Value with respect to V
DD
pin.
2. Differential voltages are the non-inverting input terminal with respect to the inverting input terminal.
3. V
CC
-V in
and V in
must not exceed 6 V.
4. Short-circuits can cause excessive heating and destructive dissipation.
5. R thja/c
are typical values.
6. Human body model: A 100 pF capacitor is charged to the specified voltage, then discharged through a
1.5 k while the other pins are floating.
7. Machine model: A 200 pF capacitor is charged to the specified voltage, then discharged directly between two pins of the device with no external series resistor (internal resistor < 5
Ω). This is done for all couples of connected pin combinations while the other pins are floating.
8. Charged device model: all pins and the package are charged together to the specified voltage and then discharged directly to the ground through only one pin. This is done for all pins.
°C kV
V kV
Symbol
V
CC
V icm
V id
T oper
Table 2. Operating conditions
Parameter
Supply voltage
(1)
Common mode input voltage range
Differential input voltage
(2)
Operating free air temperature range
TS507C
TS507I
Value
2.7 to 5.5
V
DD
to V
CC
±2.5
0 to +85
-40 to +125
1. Value with respect to V
DD
pin.
2. Differential voltages are the non-inverting input terminal with respect to the inverting input terminal.
Unit
V
°C
DocID10958 Rev 6 3/20
Electrical characteristics TS507
Table 3. Electrical characteristics at V
CC
= +5 V, V
R
L
connected to V
CC
DD
= 0 V, V icm
= V
/2 (unless otherwise specified)
Symbol Parameter Conditions Min.
/2, T
amb
= 25 °C,
Typ.
Max.
Unit
DC performance
V io
I ib
I io
CMRR
PSRR
A vd
V
OL
Input offset voltage
(2)
ΔV io
/
Δt
V io
drift vs. temperature
Input bias current
Input offset current
Common mode rejection ratio
20 log (
ΔV icm
/
ΔV io
)
Power supply rejection ratio
20 log (
ΔV
CC
/
ΔV io
)
Large signal voltage gain
V
CC
-V
OH
High level output voltage drop
Low level output voltage
V icm
= 0 to 3.8 V, T=25 °C
TS507C full temperature range
TS507I full temperature range
V icm
= 0 V to 5 V, T=25 °C
TS507C full temperature range
TS507I full temperature range
T min
< T op
< T max
T = 25 °C
TS507C full temperature range
TS507I full temperature range
T = 25 °C
TS507C full temperature range
TS507I full temperature range
V icm from 0 V to 3.8 V, T=25 °C
TS507C full temperature range
TS507I full temperature range
V icm from 0 V to 5 V
V
CC
from 2.7 V to 5.5 V,
V icm
=V cc
/2, T=25 °C
TS507C full temperature range
TS507I full temperature range
R
L
= 10 k Ω, V out
= 0.5 V to 4.5 V
Full temperature range
R
L
= 600 Ω, T=25°C
TS507C full temperature range
TS507I full temperature range
R
L
= 10 k
Ω, T=25 °C
Full temperature range
R
L
= 600
Ω, T=25 °C
TS507C full temperature range
TS507I full temperature range
R
L
= 10 k
Ω, T=25 °C
Full temperature range
91
90
89
99
98
94
94
91
25
1
8
2
115
96
105
131
67
4
64
4
95
110
120
15
15
90
110
125
15
15
70
75
110
25
35
50
100
250
400
450
550
750
µV
µV/°C nA dB mV
4/20 DocID10958 Rev 6
TS507 Electrical characteristics
Table 3. Electrical characteristics at V
CC
R
L
connected to V
CC
= +5 V, V
DD
= 0 V, V
/2 (unless otherwise specified)
Symbol Parameter Conditions
= V
Min.
CC
/2, T
amb
= 25 °C,
(continued)
Typ.
Max.
Unit
104
I out
I
CC
I sink
I source
Supply current (per operator)
V out
= V
CC,
V id
=-1 V, T=25 °C
TS507C full temperature range
TS507I full temperature range
V out
= V
DD
, V id
=1 V, T=25 °C
TS507C full temperature range
TS507I full temperature range
No load, V out
=V
CC
/2,
V icm
=0 to 5 V, T=25 °C
Full temperature range
Dynamic performance
GBP Gain bandwidth product
R
L
= 2 k
Ω, C f = 100 kHz
L
= 100 pF,
φ m
G m
Phase margin
Gain margin
R
L
= 2 k
Ω, C
L
=100 pF
SR Slew rate
R
L
V
= 2 k
Ω, C out
= 1.25 V to 3.75 V
10% to 90%
L
=100 pF,
, e
N i
N
THD+e
N
Equivalent input noise voltage f = 1 kHz
Equivalent input noise current f = 10 kHz
THD + noise f=1 kHz, G=1, R
L
V icm
=2 V, V out
=2 k
Ω
=3.5 V pp
,
1. All parameter limits at temperatures different from 25 ° C are guaranteed by correlation.
2. Measurements made at 4 V icm
values: V icm
=0 V, V icm
=3.8 V, V icm
=4.2 V, V icm
=5 V.
90
77
70
74
60
53
128
0.85
1.9
45
10
0.6
12
1.2
0.0003
1.15
1.25
mA
MHz
Degrees dB
V/µs nV/ √ Hz pA/
√ Hz
%
DocID10958 Rev 6 5/20
Electrical characteristics TS507
Table 4. Electrical characteristics at V
R
L
connected to V
CC
CC
= +3.3 V, V
DD
= 0 V, V icm
= V
/2 (unless otherwise specified)
Symbol Parameter Conditions Min.
/2, T amb
= 25 °C,
Typ.
Max.
Unit
DC performance
V io
Input offset voltage
(2)
V icm
= 0 to 2.1 V, T=25 °C
TS507C full temperature range
TS507I full temperature range
V icm
= 0 V to 3.3 V, T=25 °C
TS507C full temperature range
TS507I full temperature range
ΔV
I
I ib io io
V io
drift vs. temperature
Input bias current
Input offset current
T min
< T op
< T max
T = 25 °C
TS507C full temperature range
TS507I full temperature range
T = 25 °C
TS507C full temperature range
TS507I full temperature range
CMRR
Common mode rejection ratio
20 log (
ΔV icm
/
ΔV io
)
Large signal voltage gain
V icm
from 0 V to 2.1 V
V
CC
-V
OH
V
I
A
I vd
OL out
CC
I
I
High level output voltage drop
Low level output voltage sink source
Supply current (per operator)
R
L
= 10 k
Ω, V out
= 0.5 V to 2.8 V
R
L
= 600 Ω, T=25 °C
TS507C full temperature range
TS507I full temperature range
R
L
= 10 k
Ω, T=25 °C
Full temperature range
R
L
= 600
Ω, T=25 °C
TS507C full temperature range
TS507I full temperature range
R
L
= 10 k
Ω, T=25 °C
Full temperature range
V out
= V
CC,
V id
=-1 V, T=25 °C
TS507C full temperature range
TS507I full temperature range
V out
= V
DD
, V id
=1 V, T=25 °C
TS507C full temperature range
TS507I full temperature range
No load, V out
=V
CC
/2,
V icm
=0 to 3.3 V, T=25 °C
Full temperature range
37
32
29
33
26
22
25
1
6
2
115
127
59
4
57
4
48
56
0.81
85
100
110
15
15
80
100
115
15
15
70
75
145
25
40
45
100
250
400
450
550
750
1.1
1.2
µV
µV/°C nA dB mV mA
6/20 DocID10958 Rev 6
TS507 Electrical characteristics
Table 4. Electrical characteristics at V
CC
R
L
connected to V
CC
= +3.3 V, V
DD
= 0 V, V
/2 (unless otherwise specified)
Symbol Parameter Conditions
= V
(continued)
Min.
CC
/2, T amb
= 25 °C,
Typ.
Max.
Unit
Dynamic performance
GBP Gain bandwidth product
R
L
= 2 k Ω, C f = 100 kHz
L
= 100 pF,
φ m
G m
Phase margin
Gain margin
R
L
= 2 k Ω, C
L
=100 pF
SR Slew rate
R
L
V
= 2 k Ω, C out
10 % to 90 %
L
=100 pF,
= 0.5 V to 2.8 V
, e
N
THD+e
N
Equivalent input noise voltage f = 1 kHz
THD + noise f=1 KHz, G=1, R
V icm
=1.15 V, V out
L
=2 k Ω
=1.8 V
, pp
1. All parameter limits at temperatures different from 25 ° C are guaranteed by correlation.
2. Measurements done at 4 V icm
values: V icm
=0 V, V icm
=2.1 V, V icm
=2.5 V, V icm
=3.3 V.
1.9
45
10
0.6
12
0.0004
MHz
Degrees dB
V/µs nV/
√ Hz
%
DocID10958 Rev 6 7/20
Electrical characteristics TS507
Table 5. Electrical characteristics at V
CC
= +2.7 V V
R
L
connected to V
CC
DD
= 0 V, V icm
= V
/2 (unless otherwise specified)
Symbol Parameter Conditions Min.
/2, T amb
= 25 °C,
Typ.
Max.
Unit
DC performance
V io
Input offset voltage
(2)
V icm
= 0 to 1.9 V, T=25 °C
TS507C full temperature range
TS507I full temperature range
V icm
= 0 V to 2.7 V, T=25 °C
TS507C full temperature range
TS507I full temperature range
ΔV
I
I ib io io
V io
drift vs. temperature
Input bias current
Input offset current
T min
< T op
< T max
T = 25 °C
TS507C full temperature range
TS507I full temperature range
T = 25 °C
TS507C full temperature range
TS507I full temperature range
CMRR
Common mode rejection ratio
20 log (
ΔV icm
/
ΔV io
)
Large signal voltage gain
V icm
from 0 V to 1.5 V
V
CC
-V
OH
V
I
A
I vd
OL out
CC
I
I
High level output voltage drop
Low level output voltage sink source
Supply current (per operator)
R
L
= 10 k
Ω, V out
= 0.5 V to 2.2 V
R
L
= 600 Ω, T=25 °C
TS507C full temperature range
TS507I full temperature range
R
L
= 10 k
Ω, T=25 °C
Full temperature range
R
L
= 600
Ω, T=25 °C
TS507C full temperature range
TS507I full temperature range
R
L
= 10 k
Ω, T=25 °C
Full temperature range
V out
= V
CC,
V id
=-1 V, T=25 °C
TS507C full temperature range
TS507I full temperature range
V out
= V
DD
, V id
=1 V, T=25 °C
TS507C full temperature range
TS507I full temperature range
No load, V out
=V
CC
/2,
V icm
=0 to 2.7 V, T=25 °C
Full temperature range
22
19
17
20
15
13
25
1
8
2
115
126
57
4
57
4
30
35
0.79
85
100
105
15
15
80
100
115
15
15
70
75
160
25
45
45
100
250
400
450
550
750
1.1
1.2
µV
µV/°C nA dB mV mA
8/20 DocID10958 Rev 6
TS507 Electrical characteristics
Table 5. Electrical characteristics at V
CC
R
L
connected to V
CC
= +2.7 V V
DD
= 0 V, V
/2 (unless otherwise specified)
Symbol Parameter Conditions
= V
(continued)
Min.
CC
/2, T amb
= 25 °C,
Typ.
Max.
Unit
Dynamic performance
GBP Gain bandwidth product
R
L
= 2 k Ω, C f = 100 kHz
L
= 100 pF,
φ m
G m
Phase margin
Gain margin
R
L
= 2 k Ω, C
L
=100 pF
SR Slew rate
R
L
V
= 2 k Ω, C out
10 % to 90 %
L
=100 pF,
= 0.5 V to 2.2 V, e
N
THD+e
N
Equivalent input noise voltage f = 1 kHz
THD + noise f=1 KHz, G=1, R
V icm
=0.85 V, V out
L
=2 k Ω
=1.2 V
, pp
1. All parameter limits at temperatures different from 25 ° C are guaranteed by correlation.
2. Measurements done at 4 V icm
values: V icm
=0 V, V icm
=1.5 V, V icm
=1.9 V, V icm
=2.7 V.
1.9
45
11
0.6
12
0.0005
MHz
Degrees dB
V/µs nV/
√ Hz
%
DocID10958 Rev 6 9/20
Electrical characteristics TS507
Figure 1. Input offset voltage distribution for
V icm
≤ V
CC
-1.2 V at T=25 °C
30
25
Vio distribution at T=25°C for 0V<=Vicm<=Vcc-1.2V
20
15
10
5
0
-120 -100 -80 -60 -40 -20 0 20 40
Input offset voltage (µV)
60 80 100 120
Figure 2. Input offset voltage distribution vs. temperature for V icm
≤ V
CC
-1.2 V
400
350
300
250
200
150
100
50
0
-50
0V<=Vicm<=Vcc-1.2V
-100
-150
-200
-250
-300
-350
-400
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130
Temperature (°C)
Figure 3. Input offset voltage distribution vs. temperature for V icm
≥ V
CC
-0.8 V
-100
-200
-300
-400
300
200
100
0
700
600
500
400
-500
-600
-700
Vcc-0.8V<=Vicm<=Vcc
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130
Temperature (°C)
Figure 4. Input offset voltage distribution for
V icm
≤ V
CC
-1.2 V at T=25 °C after HTB
45
40
Vio distribution at T=25°C for 0V<=Vicm<=Vcc-1.2V
after HTB (1000 hours at 125°C)
35
30
25
20
15
10
5
0
-100 -80 -60 -40 -20 0 20 40
Input offset voltage (µV)
60 80 100
Figure 5. Input offset voltage distribution for
V icm
≤ V
CC
-1.2 V at T=25 °C after THB
Figure 6. Input offset voltage vs. input common mode voltage at T=25 °C
35
30
25
10
5
20
15
Vio distribution at T=25°C for 0V<=Vicm<=Vcc-1.2V
after THB (1000 hours at 85°C, humidity 85%)
0
-120 -100 -80 -60 -40 -20 0 20 40
Input offset voltage (µV)
60 80 100 120
00
Vcc=3.3V
Vcc=2.7V
Vcc=5.5V
Vcc=5V
-1.5
Vicm-Vcc (V)
10/20 DocID10958 Rev 6
TS507
Figure 7. Supply current vs. input common mode voltage in closed loop configuration at V
CC
=5 V
Electrical characteristics
Figure 8. Supply current vs. supply voltage at V icm
=V
CC
/2
T=125°C
0.8
0.7
T=-40°C
T=25°C
T=125°C
0.3
0.2
Vcc=5V
Closed loop
00 11 22 33
Input common mode voltage (V)
44 55
0.8
0.7
0.3
0.2
00
T=25°C
T=-40°C
11
Vicm=Vcc/2
22 33
Supply voltage (V)
44 55
Figure 9. Supply current vs. input common mode voltage in follower configuration at V
CC
=2.7 V
T=125°C
0.8
0.7
T=25°C
T=-40°C
0.3
0.2
0.0
0.0
Follower configuration
Vcc=2.7V
Input Common Mode Voltage (V)
Figure 10. Supply current vs. input common mode voltage in follower configuration
0.8
0.7
0.3
0.2
00
at V
CC
=5 V
T=125°C
T=25°C
T=-40°C
Follower configuration
Vcc=5V
11 22 33
Input Common Mode Voltage (V)
44 55
Figure 11. Output current vs. supply voltage at V icm
=V
CC
/2
150
125
Source
Vid = 1V
T=-40°C
T=125°C
T=25°C
75
50
25
00
-25
-50
-75
-125
-150
Sink
Vid = -1V
T=125°C
T=25°C
T=-40°C
Vicm=Vcc/2
Supply voltage (V)
Figure 12. Output current vs. output voltage at V
CC
=2.7 V
35
30
25
T=-40°C
15
10
5
00
-5
-10
-15
T=25°C
T=125°C
Vcc=2.7V
T=125°C
-25
-30
-35
-40
0.0
Sink
Vid=-1V
T=-40°C
Output Voltage (V)
Source
Vid=1V
T=25°C
DocID10958 Rev 6 11/20
Electrical characteristics TS507
Figure 13. Output current vs. output voltage at V
CC
=5 V
150
125
T=25°C
Source
Vid=1V
T=-40°C
00
-25
-50
-75
75
50
25
T=125°C
-125
-150
0.0
Sink
Vid=-1V
Vcc=5V
T=-40°C
Output Voltage (V)
T=125°C
T=25°C
Figure 14. Positive and negative slew rate vs. supply voltage
-1.0
2.0
2.5
Positive slew rate
Vin : from 0.5V to Vcc-0.5V
SR : calculated from 10% to 90%
T=-40°C T=25°C
T=-40°C
T=25°C
Negative slew rate
3.5
4.0
4.5
Supply Voltage (V)
T=125°C
T=125°C
5.5
6.0
Figure 15. Voltage gain and phase vs. frequency at V
CC
=5 V and V icm
=2.5 V at T=25 °C
Figure 16. Voltage gain and phase vs. frequency at V
CC
=5 V and V icm
=2.5 V at T=-40 °C
10
00
-10
50
30
-30
-50
10
4
Gain
Vcc=5V, Vicm=2.5V, G= -100
Rl=2kOhms, Vrl=Vcc/2
Tamb=25°C
10
5
10
6
Frequency (Hz)
Phase
Cl=100pF
Cl=230pF
180
150
120
90
60
30
0
-30
-60
-90
-120
-150
-180
10
7
10
00
-10
50
30
Gain
-30
-50
10
4
Vcc=5V, Vicm=2.5V, G= -100
Rl=2kOhms, Cl=100pF, Vrl=Vcc/2
Tamb=-40°C
10
5
10
6
Frequency (Hz)
Phase
10
7
180
150
120
90
60
30
0
-30
-60
-90
-120
-150
-180
Figure 17. Voltage gain and phase vs. frequency at V
CC
=5 V and V icm
=2.5 V at T=125 °C
Figure 18. Closed loop gain in voltage follower configuration for different capacitive load at T=25 °C
50 180
30
10
00
TS507 :
V cc
= 5 V
V icm
= 2,5 V
T = 25 °C
R
L
= 10 k Ω
-10
10
00
-10
-30
-50
10
4
Gain
Vcc=5V, Vicm=2.5V, G= -100
Rl=2kOhms, Cl=100pF, Vrl=Vcc/2
Tamb=125°C
10
5
10
6
Frequency (Hz)
Phase
0
10
7
-180
-30
-40
10k
Gain without C
L
Gain with C
L
=300 pF
Gain with C
L
=550 pF
100k
Frequency (Hz)
1M 10M
12/20 DocID10958 Rev 6
TS507 Electrical characteristics
Figure 19. Gain margin according to the output load, at V
CC
=5 V and T=25 °C
1E-6
1E-7
1E-8
UNSTABLE
V
V
T cc
= 5 V icm
= 2,5 V amb
= 25 °C
1E-9
1E-10
1E-11
30 dB
1E-12
1 10
0 dB
10 dB
20 dB
STABLE
100 1k 10k
Load Resistor (
Ω
)
100k 1M 10M
Figure 20. Phase margin according to the output load, at V
CC
=5 V and T=25 °C
1E-6
1E-7
0 °
1E-8
10 °
1E-9
1E-10
1E-11
1E-12
1
UNSTABLE
20 °
30 °
40 °
10
STABLE
50 °
100 1k 10k
Load Resistor (
Ω
)
100k
V cc
= 5 V
V icm
= 2,5 V
T amb
= 25 °C
1M 10M
Figure 21. Gain margin vs. output current, at V
CC
=5 V and T=25 °C
17.5
Recommended area
100 pF
12.5
7.5
2.5
-2.5
-4
550 pF
-3
300 pF
-1 00 1
Output Current (mA)
22
V
V
R cc
= 5 V icm
= 2,5 V
T amb
L
= 25 °C
= 2 k
Ω
3 44
10
00
-10
Figure 23. Phase and gain margins vs capacitive load at = 25 °C
30
-30
-40
10p
75
V cc
= 5 V
V icm
= 2,5 V
T amb
R
L
= 25 °C
= 2 k
Ω
50
25
0
100p
Gain Margin
-25
-50
Phase Margin
-75
1n
Load Capacitor (F)
-100
10n
Figure 22. Phase margin vs. output current, at V
CC
=5 V and T=25 °C
70
Recom m ended area
50
100 pF
300 pF
30
550 pF
10
00
-10
-3 -1 00 1
Output Current (mA)
V
V
T
R cc
= 5 V icm
= 2,5 V amb
= 25 °C
L
= 2 k
Ω
22 3 44
Figure 24. Distortion + noise vs. output voltage
0.1000
0.0100
0.0010
0.0001
0.01
Vcc=5V f=1kHz
Rl=2kOhms
Gain=1
BW =22kHz
Vicm=(Vcc-1V)/2
Vcc=3.3V
Vcc=2.7V
0.1
Output Voltage (Vpp)
1
DocID10958 Rev 6 13/20
Electrical characteristics
Figure 25. Distortion + noise vs. frequency
0.01
Vout=Vcc-1.5Vpp
Rl=2kOhms
Gain=1
BW =80kHz
Vicm=(Vcc-1V)/2
Vcc=2.7V
1E-3
Vcc=3.3V
Vcc=5V
1E-4
10 100 1000
Frequency (Hz)
10000
TS507
1000
Figure 26. Noise vs. frequency
100
10
1
1
Vcc=5V, Vicm=2.5V, Tamb=25°C
10 100
Frequency (Hz)
1000 10000
14/20 DocID10958 Rev 6
TS507 Application note
The application note AN2653, based on the TS507, describes three compensation techniques for solving stability issues when driving large capacitive loads. Two of these techniques are briefly explained below. For more details, refer to the AN2653 on:
www.st.com
.
The first technique, named out-of-the-loop compensation, uses an isolation resistor, R
OL
, added
in series between the output of the amplifier and its load (see
isolates the op-amp feedback network from the capacitive load. This compensation method is effective, but the drawback is a limitation on the accuracy of V resistive load value.
out
depending on the
Figure 27. Out-of-the-loop compensation schematics
To help implement the compensation, the abacus given in
the R
OL
value to be chosen for a given C
L
and phase/gain margins. These abacus are plotted for voltage follower configuration with a load resistor of 10 k
Ω at 25 °C.
Figure 28. Gain margin abacus: serial resistor to be added in a voltage follower configuration at 25 °C
Figure 29. Phase margin abacus: serial resistor to be added in a voltage follower configuration at 25 °C
100
100
10
1
0.1
0.01
10p 100p
STABLE
UNSTABLE
1n 10n 100n
Load Capacitor (F)
V cc
= 5 V
V icm
= 2,5 V
T = 25 °C
R
L
= 10 k
Ω
1µ 10µ
10
1
0.1
0.01
10p 100p
STABLE
30 °
20 °
10 °
0 °
UNSTABLE
1n 10n 100n
Load Capacitor (F)
V
V cc
= 5 V icm
= 2,5 V
T = 25 °C
R
L
= 10 k
Ω
1µ 10µ
DocID10958 Rev 6 15/20
Application note TS507
3.2 In-the-loop-compensation technique
The second technique is called in-the-loop-compensation technique, because the additional components (a resistor and a capacitor) used to improve the stability are inserted in the feedback loop (see
Figure 30. In-the-loop compensation schematics
This compensation method allows (by a good choice of compensation components) the original pole caused by the capacitive load to be compensated. Stability is thus improved.
The main drawback of this circuit is the reduction of the output swing, because the isolation resistor is in the signal path.
shows the best compensation components for different ranges of load capacitors
(with R
L
= 10 k Ω) in voltage follower configuration.
Table 6. Best compensation components for different load capacitor ranges in voltage follower configuration for TS507 (with R
L
= 10 k
Ω)
Load capacitor range
R
IL
(k
Ω)
C
IL
(pF)
Minimum gain margin (dB)
(1)
Minimum phase
10 pF to 100 pF
100 pF to 1 nF
1
1
250
250
1 nF to 10 nF 1
1. Parameter guaranteed by design at 25 °C.
630
17
16
11
55
42
27
16/20 DocID10958 Rev 6
TS507 Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK
® specifications, grade definitions and product status are available at:
www.st.com
.
ECOPACK
®
is an ST trademark.
Figure 31. SOT23-5 package mechanical drawing
Ref.
D
E b
C
A
A1
A2
E1 e e1
L
Min.
0.90
0.00
0.90
0.35
0.09
2.80
2.60
1.50
Table 7. SOT23-5 package mechanical data
Dimensions
Millimeters Mils
Typ.
Max.
1.45
0.15
1.30
0.50
0.20
3.00
3.00
1.75
Min.
35.4
0.00
35.4
13.7
3.5
110.2
102.3
59.0
Typ.
0.95
1.9
37.4
74.8
0.35
0.55
13.7
Max.
57.1
5.9
51.2
19.7
7.8
118.1
118.1
68.8
21.6
DocID10958 Rev 6 17/20
Package information
Figure 32. SO-8 package mechanical drawing
TS507
18/20
Ref.
c
D
E
E1
A
A1
A2 b
L k e h ccc
Min.
0.10
1.25
0.28
0.17
4.80
5.80
3.80
0.25
0.40
1°
Table 8. SO-8 package mechanical data
Dimensions
Millimeters
Typ.
Min.
Max.
1.75
0.25
4.90
6.00
3.90
1.27
0.48
0.23
5.00
6.20
4.00
0.004
0.049
0.011
0.007
0.189
0.228
0.150
0.50
1.27
8°
0.10
0.010
0.016
1°
Inches
Typ.
0.193
0.236
0.154
0.050
DocID10958 Rev 6
Max.
0.069
0.010
0.019
0.010
0.197
0.244
0.157
0.020
0.050
8°
0.004
TS507 Ordering information
Order code
Table 9. Order codes
Temperature range Package Packing Marking
TS507ID
TS507IDT
TS507ILT
TS507IYLT
(2)
-40°C to 125 °C
-40°C to 125 °C
SO-8
SOT23-5
(1)
SOT23-5
(automotive grade)
Tube or tape and reel
Tape and reel
TS507I
K131
K137
TS507CD
TS507CDT
TS507CLT
0°C to 85 °C
SO-8
Tube or tape and reel
Tape and reel
TS507C
SOT23-5
K136
1. All information related to the SOT23-5 package is subject to change without notice.
2. Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 & Q 002 or equivalent are qualified.
Date
01-Oct-2004
02-May-2006
15-Dec-2006
03-May-2007
08-Apr-2008
21-Mar-2013
Figure 33. Document revision history
Revision Changes
3
4
1
2
5
6
Preliminary data release for product in development.
Update preliminary data release for product in development.
First public release.
Automotive grade products added.
Electrical characteristics curves for Bode and AC stability added and updated.
Application note section added.
: added automotive qualification
Updated
DocID10958 Rev 6 19/20
TS507
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20/20 DocID10958 Rev 6
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