TS321
Low Power Single Operational Amplifier
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Large output voltage swing:
0 to 3.5V min. (@V
CC
= 5V)
Low supply current: 500µA
Low input bias current: 20nA
Low input offset voltage: 2mV max.
Wide power supply range:
Single supply: +3V to +30V
Dual supplies: ±1.5V to ±15V
Stable with high capacitive loads
Pin connections (top view)
D
SO-8
(Plastic Micropackage
L
SOT23-5
(Plastic Package)
Description
N.C.
1
2
3
4
-
+
8
7
6
5
N.C.
+
VCC
Output
N.C.
The TS321 is intended for cost-sensitive
applications where space saving is of great
importance. This bipolar op-amp offers the
benefits of a reduced component size (SOT23-5
package), with specifications that match (or are
better) industry standard devices (like the popular
LM358A, LM324, etc.). The TS321 has an input
common mode range (V
icm
) that includes ground,
and therefore can be employed in single supply
applications.
Inverting input
Non-inverting input
V
-
CC
Output
V
-
CC
Non-inverting input
1
5
+
V
CC
2
3
4
Inverting input
Order Codes
Part Number
TS321ILT
TS321ID/IDT
TS321AILT
TS321AID/AIDT
-40°C, +125°C
TS321IYLT
SOT23-5L (automotive grade level)
TS321AIYLT
TS321IYD/IYDT
SO-8 (automotive grade level)
TS321AIYD/AIYDT
Tube or Tape & Reel
Tape & Reel
K406
Temperature
Range
Package
SOT23-5L
SO8
SOT23-5L
SO8
Packaging
Tape & Reel
Tube or Tape & Reel
Tape & Reel
Tube or Tape & Reel
Marking
K401
321I
K402
321AI
December 2005
Rev. 4
1/12
www.st.com
12
Typical Application Schematics
TS321
1
Figure 1.
Typical Application Schematics
Typical application schematics
V
CC
6mA
4mA
C
C
100mA
Q5
Q6
Inverting
input
Non-inverting
input
Q2
Q1
Q3
Q4
Q11
Q7
R
SC
Output
Q13
Q10
Q12
50mA
GND
Q8
Q9
2/12
TS321
Absolute Maximum Ratings
2
Table 1.
Symbol
V
CC
Vi
V
id
Absolute Maximum Ratings
Key parameters and their absolute maximum ratings
Parameter
Supply Voltage
Input Voltage
Differential Input Voltage
Output Short-circuit Duration - note
(1)
I
in
T
oper
T
stg
R
thja
Input Current - note
(2)
Operating Free Air Temperature Range
Storage Temperature Range
Thermal Resistance Junction to Ambient
(3)
SOT23-5
SO8
Thermal Resistance Junction to Case
SOT23-5
SO8
HBM: Human Body Model
(4)
ESD
MM: Machine Model
(5)
Value
±16 to 32
-0.3 to +32
+32
Infinite
50
-40 to +125
-65 to +150
250
125
81
40
300
200
mA
°C
°C
°C/W
Unit
V
V
V
R
thjc
°C/W
V
V
1. Short-circuits from the output to V
CC
can cause excessive heating if V
CC
> 15V. The maximum output current is
approximately 40mA independent of the magnitude of V
CC
.
2. This input current only exists when the voltage at any of the input leads is driven negative. It is due to the collector-base
junction of the input PNP transistor becoming forward biased and thereby acting as input diodes clamps. In addition to this
diode action, there is also NPN parasitic action on the IC chip. This transistor action can cause the output voltages of the
Op-amps to go to the V
CC
voltage level (or to ground for a large overdrive) for the time duration than an input is driven
negative. This is not destructive and normal output will set up again for input voltage higher than -0.3V.
3. Short-circuits can cause excessive heating. Destructive dissipation can result from simultaneous short-circuit on all
amplifiers. All values are typical.
4. Human body model, 100pF discharged through a 1.5kΩ resistor into pin of device.
5. Machine model ESD, a 200pF cap is charged to the specified voltage, then discharged directly into the IC with no external
series resistor (internal resistor < 5Ω), into pin to pin of device.
3/12
Electrical Characteristics
TS321
3
Table 2.
Symbol
Electrical Characteristics
V
cc+
= +5V, V
cc-
= Ground, V
o
= 1.4V, T
amb
= +25°C (unless otherwise specified)
Parameter
Conditions
T
amb
= +25°C
TS321A
T
min.
≤
T
amb
≤
T
max.
TS321A
T
amb
= +25°C
T
min.
≤
T
amb
≤
T
max.
T
amb
= +25°C
T
min.
≤
T
amb
≤
T
max
V
CC+
= +15V, R
L
= 2kΩ, Vo = 1.4V to 11.4V
T
amb
= +25°C
T
min.
≤
T
amb
≤
T
max.
R
s
≤
10kΩ
V
CC+
= 5 to 30V
T
amb
= +25°C
T
amb
= +25°C, V
CC
= +5V
V
CC
= +30V
T
min.
≤
T
amb
≤
T
max.
, V
CC
= +5V
V
CC
= +30
V
CC
= +30V
T
amb
= +25°C
T
min.
≤
T
amb
≤
T
max.
R
s
≤
10kΩ
T
amb
= +25°C
V
id
= +1V
V
CC
= +15V, V
o
= +2V
V
id
= -1V
V
CC
= +15V, V
o
= +2V
V
CC
= +15V, V
o
= +0.2V
V
CC
= +15V
V
CC
= +30V
T
amb
= +25°C, R
L
= 2kΩ
T
min.
≤
T
amb
≤
T
max.
T
amb
= +25°C, R
L
= 10kΩ
T
min.
≤
T
amb
≤
T
max.
V
CC
= +5V, R
L
= 2kΩ
T
amb
= +25°C
T
min.
≤
T
amb
≤
T
max.
R
L
= 10kΩ
T
amb
= +25°C
T
min.
≤
T
amb
≤
T
max.
26
25.5
27
26.5
3.5
3
5
15
20
mV
0
0
65
20
10
12
85
40
20
50
40
27
28
V
60
50
25
Min.
Typ.
0.5
Max.
4
2
5
3
30
50
150
200
Unit
V
io
Input Offset Voltage
(1)
mV
I
io
I
ib
Input Offset Current
Input Bias Current
(2)
Large Signal Voltage
Gain
Supply Voltage
Rejection Ratio
2
20
nA
nA
A
vd
100
V/mV
SVR
dB
65
110
500
600
600
800
900
900
1000
V
CC
-1.5
V
CC
-2
I
CC
Supply Current, no load
µA
V
icm
Common Mode Input
Voltage Range
(3)
Common Mode
Rejection Ratio
Output Current Source
V
CMR
I
source
dB
mA
I
sink
I
o
Output Sink Current
Short Circuit to Ground
mA
µA
mA
V
OH
High Level Output
Voltage
V
OL
Low Level Output
Voltage
4/12
TS321
Table 2.
Symbol
SR
GBP
φm
THD
en
Electrical Characteristics
V
cc+
= +5V, V
cc-
= Ground, V
o
= 1.4V, T
amb
= +25°C (unless otherwise specified)
Parameter
Slew Rate
Gain Bandwith Product
Phase Margin
Total Harmonic
Distortion
Equivalent Input Noise
Voltage
f = 1kHz, A
V
= 20dB, R
L
= 2kΩ, V
o
= 2Vpp,
C
L
= 100pF, T
amb
= +25°C, V
CC
= 30V
f = 1kHz, R
s
= 100Ω, V
CC
= 30V
Conditions
V
CC
= +15V, V
i
= 0.5 to 3V, R
L
= 2kΩ,
C
L
= 100pF, T
amb
= +25°C, unity gain
V
CC
= 30V, f = 100kHz, T
amb
= +25°C,
V
in
= 10mV, R
L
= 2kΩ, C
L
= 100pF
Min.
Typ.
0.4
0.8
60
0.015
40
Max.
Unit
V/µs
MHz
Degrees
%
nV
-----------
-
Hz
1. Vo = 1.4V, Rs = 0W, 5V < V
CC
+ < 30V, 0 < V
ic
< V
CC
+ - 1.5V
2. The direction of the input current is out of the IC. This current is essentially constant, independent of the state of the output
so no loading change exists on the input lines.
3. The input common-mode voltage of either input signal voltage should not be allowed to go negative by more than 0.3V.
The upper end of the common-mode voltage range is V
CC
+ - 1.5V, but either or both inputs can go to +32V without
damage.
5/12
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