TS321
Low Power Single Operational Amplifier
SOT-25
Pin Definition:
1. Input +
2. Ground
3. Input -
4. Output
5. Vcc
General Description
The TS321 brings performance and economy to low power systems. With high unity gain frequency and a guaranteed
0.4V/uS slew rate, the quiescent current is only 430uA/amplifier (5V). The input common mode range includes ground
and therefore the device is able to operate in single supply applications as well as in dual supply applications. It is also
capable of comfortably driving large capacitive loads.
The TS321 is available in the SOT-25 package. Overall the TS321 is a low power, wide supply range performance OP
Amp that can be designed into a wide range of applications at an economical price without sacrificing valuable board
space.
Features
●
●
●
●
●
●
●
Short circuit protected outputs
True differential input stage
Wide supply voltage range +3V to 32V
Low input bias currents
Internally compensated
Common mode range extends to negative supply
Single Version of TS324
Block Diagram
Applications
●
●
●
●
●
Chargers
Power Supplies
Industrial: Controls, Instruments
Desktops
Communications Infrastructure
Ordering Information
Part No.
TS321CX5 RFG
Package
SOT-25
Packing
3,000pcs / 7” Reel
Absolute Maximum Rating
Parameter
Supply Voltage
Input Voltage
Input Current (VIN < -0.3V)
Output Short Circuit Duration
Operating Temperature Range
Storage Temperature Range
o
Mounting Temperature (Soldering @ 260 C)
Thermal Resistance Junction to Ambient
Symbol
Vcc
V
IN
V
I
tsc
T
OPR
T
STG
R
ӨJA
Limit
+32
-0.3 to +32
50
Continuous
-40 ~ +85
-65 ~ +150
10
265
Unit
V
V
mA
C
o
C
S
o
C/W
o
Document Number: DS_P0000227
1
Version: B15
TS321
Low Power Single Operational Amplifier
Electrical Characteristics
Unless otherwise specified, all limits guarantee for at T
A
=25ºC, V+=5V, V-=5V,
Vo=1.4V.
Boldface
limits apply at temperature extremes.
Symbol
V
OS
I
OS
I
B
V
CM
A
V
PSRR
CMRR
V
O
Parameter
Input Offset Voltage
Input Offset Current
Input Bias Current (Note 8)
Input Common-Mode Voltage Range
Large Signal Voltage Gain
Power Supply Rejection Ratio
Common Mode Rejection Ratio
Output Swing
VOH
VOL
Conditions
(Note 1)
Min
--
--
--
--
--
--
0
--
25
15
65
65
26
27
--
--
--
--
--
20
10
10
5
--
12
--
--
Typ
2
--
5
--
45
--
--
--
100
--
100
85
--
28
5
0.43
0.7
0.66
1.5
40
20
20
8
--
100
40
0.4
Max
7
9
50
150
250
500
V+ -1.5
V+ -2
--
--
--
--
--
--
20
1.15
1.2
2.85
3
--
--
--
--
--
--
85
--
Units
mV
nA
nA
V
V/mV
dB
dB
V
mV
mA
V+ = 30V (Note 9)
For CMRR > = 50dB
(V+ = 15V, R
L
=2kΩ
Vo = 1.4V to 11.4V)
R
S
≤
10kΩ, V+
≤
5V to 30V
R
S
≤
10kΩ
V+ = 30V, RL =2kΩ
V+ = 30V, RL = 10kΩ
V+ = 5V, RL = 10kΩ
V+ = 5V
V+ = 30V
V
ID
= +1V, V+ = 15V,
V
O
=2V
V
ID
= −1V
V+ = 15V, V
O
=2V
V
ID
= −1V
V+ = 15V, V
O
= 0.2V
V+ = 15V
V+ = 15V, RL =2kΩ,
V
IN
= 0.5 to 3V
C
L
= 100pF, Unity Gain
V+ = 30V, f = 100kHz,
V
IN
= 10mV, R
L
=2kΩ,
C
L
= 100pF
f = 1kHz, A
V
= 20dB
R
L
=2kΩ, V
O
= 2V
PP
C
L
= 100pF, V+ = 30V
f = 1kHz, R
S
= 100Ω
V+ = 30V
I
S
Supply Current, No Load
I
SOURCE
Output Current Sourcing
mA
mA
µA
mA
V/µs
I
SINK
I
O
SR
Output Current Sinking
Output Short Circuit to Ground
Slew Rate
GBW
Gain Bandwidth Product
--
1
--
MHz
THD
en
Total Harmonic Distortion
Equivalent Input Noise Voltage
--
--
0.015
40
--
--
%
nV
Note:
o
1. V
o
≒1.4V,
R
s
=0Ω with V+ from 5V to 30V; and over the full input common-mode range(0V~V+ -1.5V)at 25 C
+
2. short circuits from the output V can cause excessive heating and eventual destruction. When considering short
circuits to ground the maximum output current is approximately 40mA independent of the magnitude of V
+
values of
supply voltage in excess of +15v,continuous short circuit can exceed the power dissipation ratings and cause
eventual destruction.
Document Number: DS_P0000227
2
Version: B15
TS321
Low Power Single Operational Amplifier
Application Hints
The TS321 OP amp can operate with a single or dual power supply voltage has true-differential inputs, and remain in
he linear mode with an input common-mode voltage of 0 V
DC
. This amplifier operates over a wide range of power
o
supply voltages, with little change in performance characteristics .At 25 C amplifier operation is possible down to a
minimum supply voltage of 3V.
Large differential input voltage can be easily accommodates and, as input differential voltage protection diodes are not
needed, no large input currents result from large differential input voltage. The differential input voltage may be larger
+
than V without damaging the device. Protection should be provided to prevent the input voltage from going negative
o
more than –0.3 V
DC
(at 25 C).
An input clamp diode with a resistor to the IC input terminal can be used.
To reduce the power supply drain, the amplifier has a class A output stage for small signal levels which converts to
class B in a large signal mode. This allows the amplifiers to both source and sink large output currents. Therefore both
NPN and PNP external current boots transistor can be used to extend the power capability of the basic amplifiers. The
output voltage needs to raise approximately 1 diode drop above ground to bias the on-chip vertical PNP transistor for
output current sinking applications.
For AC applications, where the load is capacitively coupled to the output of the amplifier, a resistor should be used,
from the output of the amplifier to ground to increase the class A bias current and to reduce distortion. Capacitive loads
which are applied directly to the output of the amplifier reduce the loop stability margin. Values of 50pF can be
accommodated using the worst-case non-inverting unity gain connection. Large closed loop gains or resistive isolation
should be used if large load capacitance must be driven by the amplifier
The bias network of the TS312 establishes a supply current which is independent of the magnitude of the magnitude of
the power supply voltage over the range of from 3V
DC
to 3V
DC.
Output short circuits either to ground or to the positive power supply should be of short time duration. Units can be
destroyed , not as a result of the short circuit current causing metal fusing, but rather due to the large increase in IC
chip dissipation which cause eventual failure due to excessive junction temperatures. The large value of output source
o
current which is available at 25 C, provides a large output current capability at elevated temperature than a standard IC
op amp.
The circuits presented in the section on typical applications emphasize operation on only a single power supply voltage.
If complementary power supplies are available, all of the standard op amp circuits can be used. In general, introducing
+
a pseudo-ground (a bias voltage reference of V /2) will allow operation above and below this value in single power
supply systems. Many application circuits are shown which take advantage of the wide input common-mode voltage
range which includes ground. In most cases, input biasing is not required and input voltage which range to ground can
easily be accommodated.
Typical Applications
Figure 1. LED Driver
Figure 2. Lamp Driver
Document Number: DS_P0000227
3
Version: B15
TS321
Low Power Single Operational Amplifier
Typical Applications (Continues)
Figure 3. DC Summing Amplifier
Figure 4. Amplitude Modulator Circuit
Figure 5. Fixed Current Sources
Figure 6. Power Amplifier
Figure 7. Non-Inverting DC Gain (0V Input = 0V Output)
Document Number: DS_P0000227
4
Version: B15
TS321
Low Power Single Operational Amplifier
SOT-25 Mechanical Drawing
DIM
A+A1
B
C
D
E
E
H
L
Ө1
S1
SOT-25 DIMENSION
MILLIMETERS
INCHES
MIN
MAX
MIN
MAX.
0.09
1.25
0.0354
0.0492
0.30
0.50
0.0118
0.0197
0.09
0.25
0.0035
0.0098
2.70
3.10
0.1063
0.1220
1.40
1.80
0.0551
0.0709
1.90 BSC
0.0748 BSC
2.40
3.00
0.09449
0.1181
0.35 BSC
0.0138 BSC
0º
10º
0º
10º
0.95 BSC
0.0374 BSC
Marking Diagram
21
= Product Code for TS321CX5
Y
= Year Code
M
= Month Code for Halogen Free Product
O
=Jan
P
=Feb
Q
=Mar
R
=Apr
S
=May
T
=Jun
U
=Jul
V
=Aug
W
=Sep
X
=Oct
Y
=Nov
Z
=Dec
L
= Lot Code (1~9, A~Z)
Document Number: DS_P0000227
5
Version: B15
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