TS7221
Single BiCMOS rail-to-rail micropower comparator
Features
■
■
■
■
■
■
■
■
Rail-to-rail inputs
Open drain output
Supply operation from 2.7V to 10V
Typical supply current: 6µA @ 5V
Response time of 0.5µs at 5V
Low input current
ESD protection: 2kV (HBM), 200V (MM)
Available in tiny SOT23-5 package
TS7221 Open drain output
1
2
+
IN+
3
-
4
IN-
L
SOT23-5L
Applications
■
■
■
■
■
■
Battery-powered systems
Notebooks and PDAs
PCMCIA cards
Cellulars and mobile communication
Alarm and security systems
Replacement of amplifiers used in comparator
configuration for better performance
OUT
Vcc+
5
Vcc-
Description
The TS7221 is a micropower comparator
featuring rail-to-rail input performance in a tiny
SOT23-5 package. This comparator is ideally
suited to space and weight-critical applications. It
is fully specified at 2.7V, 5V and 10V operation
over the industrial temperature range (-40°C to
+85°C).
The TS7221 features an open drain output stage.
The speed-to-power ratio makes this device ultra-
versatile for a wide range of applications.
March 2007
Rev 3
1/11
www.st.com
11
Absolute maximum ratings
TS7221
1
Absolute maximum ratings
Table 1.
Symbol
ESD
Machine model (MM)
V
ID
V
IN
V
OUT
V
CC
I
IN
I
OUT
T
Lead
T
stg
T
J
P
D
Differential input voltage
Input voltage
(1)
Output voltage
Supply voltage
Current at input pins
(1)
Current at output pin
Lead temperature
(soldering 10 seconds, Pb-free package)
Storage temperature
Junction temperature
Power dissipation
(2)
SOT23-5
200
(V
CC-
) -0.3 to (V
CC+
) +0.3
(V
CC-
) -0.3 to (V
CC+
) +0.3
12
12
±5
± 30
260
-65 to +150
150
500
V
V
V
V
mA
mA
°C
°C
°C
mW
Absolute maximum ratings
Parameter
Human body model (HBM)
Value
2000
V
Unit
1. The magnitude of input voltages must never exceed 0.3V beyond the supply voltage.
2. T
J
= 150°C, T
AMB
= 25
o
C with R
TH-JA
= 250
o
C/W for SOT23-5 package.
Table 2.
Symbol
V
CC
T
amb
V
icm
Operating conditions
Parameter
Supply voltage
Ambient temperature
Common mode input voltage range
Value
2.7 to 10
-40 to +85
(V
CC-
) -0.3 to (V
CC+
) +0.3
Unit
V
°C
V
2/11
TS7221
Electrical characteristics
2
Table 3.
Symbol
Electrical characteristics
Electrical characteristics at V
CC+
= 2.7V, T
amb
= 25°C (unless otherwise specified)
(1)
Parameter
Input offset voltage (full common mode range)
– TS7221A
at T
min
≤
T
amb
≤
T
max
– TS7221B
at T
min
≤
T
amb
≤
T
max
Input offset voltage drift with temperature
Input bias current
(2)
at T
min
≤
T
amb
≤
T
max
Input offset current
(2)
at T
min
≤
T
amb
≤
T
max
Common-mode rejection ratio (0 < V
icm
< 2.7V)
Power supply rejection ratio (2.7 < V
CC
< 10V)
Voltage gain
(3)
Input common mode voltage range
at T
min
≤
T
amb
≤
T
max
High level output voltage (IN
+
=0.5V, IN
-
=0V & OUT=10V)
Low level output voltage, I
sink
= 5mA
at T
min
≤
T
amb
≤
T
max
Supply current
Output low
Output high
Response time low to high (V
ic
= 1.35V, C
L
= 50pF, R
L
=10kΩ)
Overdrive = 10mV
Overdrive = 100mV
Response time high to low (V
ic
= 1.35V, C
L
= 50pF, R
L
=10kΩ)
Overdrive = 10mV
Overdrive = 100mV
Fall time
C
L
= 50pF, R
L
=5kΩ, Overdrive = 10mV
Rise time
C
L
= 50pF, R
L
=5kΩ, Overdrive = 10mV
-0.3
0.0
0.1
0.2
6
1
1
65
80
240
3
2.7
500
0.35
0.45
12
14
300
600
150
300
Min.
Typ.
Max.
Unit
V
IO
7
10
15
18
mV
ΔV
IO
I
IB
I
IO
CMRR
PSRR
A
VD
V
icm
I
OH
V
OL
µV/
o
C
pA
pA
dB
dB
dB
V
nA
V
I
CC
6
8
1.5
0.6
µA
T
PLH
µs
T
PHL
1.5
0.5
0.3
0.3
µs
T
F
T
R
µs
µs
1. Limits are 100% production tested at +25°C. Behavior at the temperature range limits is guaranteed through correlation
and by design.
2. Maximum values include unavoidable inaccuracies of industrial testing.
3. Design evaluation.
3/11
Electrical characteristics
Table 4.
Symbol
TS7221
Electrical characteristics for V
CC+
= 5V, T
amb
= 25°C (unless otherwise specified)
(1)
Parameter
Input offset voltage (full common mode range)
– TS7221A
at T
min
≤
T
amb
≤
T
max
– TS7221B
T
min
≤
T
amb
≤
T
max
Input offset voltage drift with temperature
Input bias current
(2)
at T
min
≤
T
amb
≤
T
max
Input offset current
(2)
at T
min
≤
T
amb
≤
T
max
Common-mode rejection ratio (0 < V
icm
< 5V)
Power supply rejection ratio (2.7 < V
CC
< 10V)
Voltage gain
(3)
Input common mode voltage range
at T
min
≤
T
amb
≤
T
max
High level output voltage (IN
+
=0.5V, IN
-
=0V & OUT=10V)
Low level output voltage, I
sink
= 5mA
at 25°C
at T
min
≤
T
amb
≤
T
max
Supply current
Output low
Output high
Response time low to high (V
ic
= 2.5V, C
L
= 50pF, R
L
=10kΩ )
Overdrive = 10mV
Overdrive = 100mV
Response time high to low (V
ic
= 2.5V, C
L
= 50pF, R
L
=10kΩ)
Overdrive = 10mV
Overdrive = 100mV
Fall time
C
L
= 50pF, R
L
=5kΩ, Overdrive = 10mV
Rise time
C
L
= 50pF, R
L
=5kΩ, Overdrive = 10mV
-0.3
0.0
0.1
0.2
6
1
1
70
80
240
5.3
5.0
500
0.40
0.55
12
14
300
600
150
300
Min.
Typ.
Max.
Unit
V
IO
7
10
15
18
mV
ΔV
IO
I
IB
I
IO
CMRR
PSRR
A
VD
V
icm
I
OH
V
OL
µV/
o
C
pA
pA
dB
dB
dB
V
nA
V
I
CC
6
8
2
0.5
2
0.4
0.3
0.3
µA
T
PLH
µs
T
PHL
µs
T
F
T
R
µs
µs
1. Limits are 100% production tested at +25°C. Behavior at the temperature range limits is guaranteed through correlation
and by design.
2. Maximum values include unavoidable inaccuracies of industrial testing.
3. Design evaluation.
4/11
TS7221
Table 5.
Symbol
Electrical characteristics
Electrical characteristics for V
CC+
= 10V, T
amb
= 25°C (unless otherwise specified)
(1)
Parameter
Input offset voltage (full common mode range)
– TS7221A
at T
min
≤
T
amb
≤
T
max
– TS7221B
T
min
≤
T
amb
≤
T
max
Input offset voltage drift with temperature
Input bias current
(2)
at T
min
≤
T
amb
≤
T
max
Input offset current
(2)
at T
min
≤
T
amb
≤
T
max
Common-mode rejection ratio (0 < V
icm
< 10V)
Power supply rejection ratio (2.7 < V
CC
< 10V)
Voltage gain
(3)
Input common mode voltage range
at T
min
≤
T
amb
≤
T
max
High level output voltage (IN
+
=0.5V, IN
-
=0V & OUT=10V)
Low level output voltage, I
sink
= 5mA
at T
min
≤
T
amb
≤
T
max
Supply current
Output low
Output high
Response time low to high (V
ic
= 5V, C
L
= 50pF, R
L
=10kΩ)
Overdrive = 10mV
Overdrive = 100mV
Response time high to low (V
ic
= 5V, C
L
= 50pF, R
L
=10kΩ)
Overdrive = 10mV
Overdrive = 100mV
Fall time
C
L
= 50pF, R
L
=5kΩ Overdrive = 10mV
,
Rise time
,
C
L
= 50pF, R
L
=5kΩ Overdrive = 10mV
-0.3
0.0
0.1
0.2
6
1
1
75
80
240
10.3
10.0
500
0.40
0.55
14
16
300
600
150
300
Min.
Typ.
Max.
Unit
V
IO
7
10
15
18
mV
ΔV
IO
I
IB
I
IO
CMRR
PSRR
A
VD
V
ICM
I
OH
V
OL
μV/
o
C
pA
pA
dB
dB
dB
V
nA
V
I
CC
7
10
3
0.5
4
0.4
0.3
0.3
μA
T
PLH
μs
T
PHL
μs
T
F
T
R
μs
μs
1. Limits are 100% production tested at +25°C. Behavior at the temperature range limits is guaranteed through correlation
and by design.
2. Maximum values include unavoidable inaccuracies of industrial testing.
3. Design evaluation.
5/11
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