TS372
Low power dual CMOS voltage comparator
Features
■
■
■
■
■
■
■
■
■
■
Wide single supply range or dual supplies 3 V
to 16 V or ±1.5 V to ±8 V
Very low supply current: 0.1 mA/comparator
independent of supply voltage
Extremely low input bias current: 1 pA typ
Extremely low input offset currents: 1 pA typ
Low input offset voltage
Input common-mode voltage range includes
GND
Low output saturation voltage 150 mV typical
Output compatible with TTL, MOS and CMOS
High input impedance: 10
12
Ω
typical
Fast response time: 200 ns typ for TTL level
input step
D
SO8
(plastic micropackage)
N
DIP8
(plastic package)
Applications
■
■
■
Battery powered electronics
General-purpose portable device
General-purpose low voltage application
Pin connections (top view)
Description
These devices consist of two independent
precision voltage comparators, designed to
operate with single or dual supplies.
These differential comparators use the
STMicroelectronics silicon lin MOS process giving
them an excellent consumption-speed ratio.
These devices are ideally suited for low
consumption applications.
April 2011
Doc ID 4068 Rev 2
1/10
www.st.com
10
Application schematic
TS372
1
Figure 1.
Application schematic
Schematic diagram (1/2 TS372)
2/10
Doc ID 4068 Rev 2
TS372
Absolute maximum ratings and operating conditions
2
Absolute maximum ratings and operating conditions
Table 1.
Symbol
V
CC
+
V
id
V
i
V
o
I
o
I
F
Supply voltage
(1) (2)
Differential input voltage
(3)
Input voltage
(4)
Output voltage
Output current
Forward current in ESD protection diodes on input
(5)
Duration of output circuit to GND
(6)
p
d
T
stg
T
j
Power dissipation
(7)
DIP8
SO8
Storage temperature range
Junction temperature
Absolute maximum ratings
Parameter
Value
18
±18
18
18
20
50
Infinite
1250
710
-65 to +150
+150
mW
°C
°C
Unit
V
V
V
V
mA
mA
1. Maximum power supply voltage when the comparator is not switching.
2. All voltage values, except differential voltage, are with respect to network ground terminal.
3. Differential voltages are the non-inverting input terminal with respect to the inverting input terminal.
4. The magnitude of the input and the output voltages must never exceed the magnitude of the positive
supply voltage.
5. Guaranteed by design.
6. Short-circuit from outputs to Vcc+ can cause excessive heating and eventual destruction.
7. Pd is calculated with T
amb
= +25°C, T
j
= +150°C and R
thja
= 100°C/W for DIP8 package = 175°C/W for
SO-8 package.
Table 2.
Symbol
V
CC
+
Operating conditions
Parameter
Supply voltage
Input common-mode voltage range
(1)
T
amb
= 25°C
T
min
≤
T
amb
≤
T
max
TS372C
TS372I/TS372M
Operating free-air temperature range
TS372C
TS372I
TS372M
Value
3 to 16
V
CC+
-2
V
CC+
-2.25
V
CC+
-2.5
Unit
V
Vicm
V
T
oper
0 to +70
-40 to +125
-55 to +125
°C
1. And input voltages < = 12 V.
Doc ID 4068 Rev 2
3/10
Electrical characteristics
TS372
3
Electrical characteristics
Table 3.
Symbol
Electrical characteristics at V
CC
+ = 5 V, V
CC
- = 0 V, Tamb = 25°C
(unless otherwise specified)
Parameter
Input offset voltage (V
ic
= V
icm min
)
(1)
T
amb
= 25°C
T
min
≤
T
amb
≤
T
max
Input offset current
(2)
T
amb
= 25°C
T
min
≤
T
amb
≤
T
max
TS372C
TS372I/TS372M
Input offset current
(2)
T
amb
= 25°C
T
min
≤
T
amb
≤
T
max
TS372C
TS372I/TS372M
High level output current (V
id
= 1 V)
T
amb
= 25°C V
OH
= 5 V
T
min
≤
T
amb
≤
T
max
V
OH
= 15 V
Low level output voltage (V
id
= -1, I
OL
= 4 mA)
T
amb
= 25°C
T
min
≤
T
amb
≤
T
max
Low level output current (V
id
= -1, V
OL
= 1.5 V)
Supply current (each comparator)
(V
id
= 1 V, no load)
6
Min.
Typ.
Max.
Unit
V
io
2
10
12
mV
I
io
1
100
200
1
150
300
0.1
1
100
45
150
375
400
700
pA
pA
I
ib
I
OH
nA
µA
mV
mA
µA
V
OL
I
OL
I
CC
1. The specified offset voltage is the maximum value required to drive the output down to 400 mV or up to 4 V
with R
L
= 100 kΩ to V
cc
+
2. Maximum values including unavoidable inaccuracies of the industrial test.
Table 4.
Symbol
Switching characteristics (V
CC
+ = 5 V, Tamb = 25°C)
Parameter
Response time
(R
L
= 5.1 kΩ connected to 5 V, C
L
= 15 pF
(1)
100mV input step with 5mV overdrive
TTL level input step
Min.
Typ.
Max.
Unit
t
re
600
200
ns
1. The specified response time is the internal between the input signal and the instant when the output signal
crosses 1.4 V.
Note:
If one of the two channels is not used, it must be configured with a differential
input voltage greater than 100 mV to avoid switching.
4/10
Doc ID 4068 Rev 2
TS372
Package information
4
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.
Doc ID 4068 Rev 2
5/10
PCB设计
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