Single BiCMOS rail-to-rail micropower comparator
Features
■ Rail-to-rail inputs
■ Open drain output
■ Supply operation from 2.7 to 10 V
■ Typical supply current: 6 µA at 5 V
■ Response time of 0.5 µs at 5 V
■ Low input current
■ ESD protection: 2 kV (HBM), 200 V (MM)
■ Available in tiny SOT23-5 package
TS7221
L
SOT23-5L
Applications
■ Battery-powered systems
■ Notebooks and PDAs
■ PCMCIA cards
■ Cellular and mobile communications
■ Alarms and security systems
■ Replacement of amplifiers used in comparator
configurations for improved performance.
Description
The TS7221 is a micropower comparator
featuring a 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 2.7-, 5- and 10-V operation
over industrial temperature ranges
(-40°C to +85°C).
The TS7221 features an open-drain output stage.
The speed-to-power ratio makes this device ultraversatile for a wide range of applications.
TS7221 open drain output
OUT
Vcc+
IN+
1
2
+
3
5
-
4
Vcc-
IN-
March 2009 Rev 5 1/13
www.st.com
13
Absolute maximum ratings TS7221
1 Absolute maximum ratings
Table 1. Absolute maximum ratings
Symbol Parameter Value Unit
V
CC
V
ID
V
IN
V
OUT
I
IN
I
OUT
R
thja
R
thjc
T
Lead
T
stg
T
J
ESD
1. The magnitude of input voltages must never exceed 0.3 V beyond the supply voltage.
2. Short-circuits can cause excessive heating. These values are typical.
3. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a
1.5 kΩ resistor between two pins of the device. This is done for all couples of connected pin combinations
while the other pins are floating.
4. 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.
Table 2. Operating conditions
Supply voltage 12 V
Differential input voltage (V
Input voltage
(1)
(V
-
) -0.3 to (V
CC
-
) -0.3 to (V
CC
+
) +0.3 V
CC
+
) +0.3 V
CC
Output voltage 12 V
Current at input pins
(1)
± 5 mA
Current at output pin ± 30 mA
(2)
(2)
250
°C/W
°C/W
Thermal resistance junction to ambient
SOT23-5
Thermal resistance junction to case
SOT23-5 81
Lead temperature (soldering 10 seconds) 260 °C
Storage temperature -65 to +150 °C
Junction temperature 150 °C
(4)
(3)
2000
200
Human body model (HBM)
Machine model (MM)
V
Symbol Parameter Value Unit
V
T
V
CC
amb
icm
Supply voltage 2.7 to 10 V
Ambient temperature -40 to +85 °C
Common mode input voltage range (V
2/13
-
) -0.3 to (V
CC
+
) +0.3 V
CC
TS7221 Electrical characteristics
2 Electrical characteristics
Table 3. Electrical characteristics at V
+
=2.7V, T
CC
= 25° C (unless otherwise specified)
amb
Symbol Parameter Min. Typ. Max. Unit
Input offset voltage (full common mode range)
– TS7221A
V
IO
at T
min
≤ T
amb
≤ T
max
– TS7221B
at T
≤ T
amb
amb
amb
≤ T
≤ T
≤ T
(2)
max
max
(2)
max
ΔV
min
Input offset voltage drift with temperature 6 µV/oC
IO
I
IB
I
IO
Input bias current
at T
≤ T
min
Input offset current
≤ T
at T
min
CMRR Common-mode rejection ratio (0 < V
PSRR Power supply rejection ratio (2.7 < V
≤ T
≤ T
amb
amb
(3)
≤ T
≤ T
max
max
sink
= 5 mA
A
VD
V
icm
I
OH
V
OL
Voltage gain
Input common mode voltage range
at T
min
High level output voltage (IN+= 0.5 V, IN-= 0 V and
OUT = 10 V)
Low level output voltage, I
at T
min
1 300
1 150
< 2.7 V) 65 dB
icm
< 10 V) 80 dB
CC
240 dB
-0.3
0.0
0.1 500 nA
0.2 0.35
7
10
15
18
600
300
3
2.7
0.45
Supply current
I
CC
Output low
Output high
6
8
12
14
(1)
mV
pA
pA
V
V
µA
Response time low to high
(V
= 1.35 V, CL=50pF, RL=10kΩ)
T
PLH
ic
Overdrive = 10 mV
Overdrive = 100 mV
1.5
0.6
Response time high to low
= 1.35 V, CL=50pF, RL=10kΩ)
(V
T
PHL
T
F
T
R
1. Limits are 100% production-tested at +25° C. Behavior at temperature range limits is guaranteed through correlation and
by design.
2. Maximum values include unavoidable inaccuracies of industrial testing.
3. Design evaluation.
ic
Overdrive = 10 mV
Overdrive = 100 mV
Fall time
= 50 pF, RL=5kΩ, overdrive = 10 mV
C
L
Rise time
CL = 50 pF, RL=5kΩ, overdrive = 10 mV
1.5
0.5
0.3 µs
0.3 µs
3/13
µs
µs
Electrical characteristics TS7221
Table 4. Electrical characteristics for V
CC
+
= 5 V, T
= 25° C (unless otherwise specified)
amb
Symbol Parameter Min. Typ. Max. Unit
Input offset voltage (full common mode range)
– TS7221A
V
IO
at T
min
≤ T
amb
≤ T
max
– TS7221B
≤ T
≤ T
≤ T
amb
amb
amb
≤ T
≤ T
≤ T
max
(2)
max
max
(2)
ΔV
T
min
Input offset voltage drift with temperature 6 µV/oC
IO
I
IB
I
IO
Input bias current
at T
min
Input offset current
at T
min
CMRR Common-mode rejection ratio (0 < V
PSRR Power supply rejection ratio (2.7 < V
≤ T
min
amb
≤ T
(3)
≤ T
amb
max
≤ T
max
sink
= 5 mA
A
VD
V
icm
I
OH
V
OL
Voltage gain
Input common mode voltage range
at T
min
High level output voltage
(IN+= 0.5 V, IN-= 0 V and OUT = 10 V) 0.1 500
Low level output voltage, I
at T
1 300
1 150
< 5 V) 70 dB
icm
< 10 V) 80 dB
CC
240 dB
-0.3
0.0
0.2 0.40
7
10
15
18
600
300
5.3
5.0
0.55
Supply current
I
CC
Output low
Output high
6
8
12
14
(1)
mV
pA
pA
V
nA
V
µA
Response time low to high
T
PLH
(Vic= 2.5 V, CL =50pF, RL=10kΩ)
Overdrive = 10 mV
Overdrive = 100 mV
2
0.5
Response time high to low
= 2.5 V, CL = 50 pF, RL=10kΩ)
(V
T
PHL
T
F
T
R
1. Limits are 100% production-tested at +25° C. Behavior at temperature range limits is guaranteed through correlation and
by design.
2. Maximum values include unavoidable inaccuracies of industrial testing.
3. Design evaluation.
ic
Overdrive = 10 mV
Overdrive = 100 mV
Fall time
= 50 pF, RL=5kΩ, overdrive = 10 mV
C
L
Rise time
CL = 50 pF, RL=5kΩ, overdrive = 10 mV
2
0.4
0.3 µs
0.3 µs
µs
µs
4/13
TS7221 Electrical characteristics
Table 5. Electrical characteristics for V
+
=10V, T
CC
= 25° C (unless otherwise specified)
amb
Symbol Parameter Min. Typ. Max. Unit
Input offset voltage (full common mode range)
– TS7221A
V
IO
at T
min
≤ T
amb
≤ T
max
– TS7221B
T
≤ T
≤ T
≤ T
amb
amb
amb
≤ T
≤ T
≤ T
max
(2)
max
max
(2)
ΔV
min
Input offset voltage drift with temperature 6 μV/oC
IO
I
IB
I
IO
Input bias current
at T
min
Input offset current
at T
min
CMRR Common-mode rejection ratio (0 < V
PSRR Power supply rejection ratio (2.7 < V
≤ T
≤ T
(3)
240 dB
≤ T
amb
max
= 5 mA
sink
≤ T
amb
max
A
VD
V
ICM
I
OH
V
OL
Voltage gain
Input common mode voltage range
at T
min
High level output voltage
+
= 0.5 V, IN-= 0 V and OUT = 10 V) 0.1 500
(IN
Low level output voltage, I
at T
min
1 300
1 150
< 10 V) 75 dB
icm
< 10 V) 80 dB
CC
-0.3
0.0
0.2 0.40
7
10
15
18
600
300
10.3
10.0
0.55
Supply current
I
CC
Output low
Output high
10
7
14
16
Response time low to high
= 5 V, CL = 50 pF, RL=10kΩ)
(V
T
PLH
ic
Overdrive = 10 mV
Overdrive = 100 mV
3
0.5
Response time high to low
= 5 V, CL = 50 pF, RL=10kΩ)
(V
T
PHL
ic
Overdrive = 10 mV
Overdrive = 100 mV
4
0.4
(1)
mV
pA
pA
V
nA
V
μA
μs
μs
T
T
1. Limits are 100% production-tested at +25° C. Behavior at temperature range limits is guaranteed through correlation and
by design.
2. Maximum values include unavoidable inaccuracies of industrial testing.
3. Design evaluation.
Fall time
F
CL = 50 pF, RL=5kΩ, overdrive = 10 mV
Rise time
R
= 50 pF, RL=5kΩ, overdrive = 10 mV
C
L
0.3 μs
0.3 μs
5/13
Electrical characteristics TS7221
Figure 1. Supply current vs. supply voltage
(output low)
10
T=+85°C
8
6
4
Supply current (µA)
2
0
0246810
T=+25°C
Supply voltage (V)
Output low
No load
T=-40°C
Figure 3. Output sinking current vs. output
voltage at V
1.0
0.8
0.6
T
AMB
0.4
Output voltage (V)
0.2
0.0
T
=+25°C
AMB
0246810
Figure 5. VIO vs. V
V
=5V
CC
4
T = -40°C
2
0
=+2.7V, VCC=+5V
CC
=+85°C
Sink current (mA)
and temperature at
icm
T = +85°C
VCC = + 5V
Output Low
T
=-40°C
AMB
T = +25°C
Figure 2. Supply current vs. supply voltage
(output high)
12
T=+85°C
10
8
6
Supply current (µA)
4
2
0
0246810
Figure 4. V
4
2
0
Input offset voltage (mV)
IO
V
-2
-4
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Figure 6. V
6
4
2
0
T=+25°C
Supply voltage (V)
vs. V
IO
V
CC
IO
V
CC
icm
=2.7V
T = -40°C
V
Common mode voltage (V)
ICM
vs. V
icm
=10V
T=-40°C
Output high
and temperature at
T = +85°C
T = +25°C
and temperature at
T = +25°C
T = +85°C
Input offset voltage (mV)
IO
V
-2
-4
012345
V
Common mode voltage (V)
ICM
6/13
Input offset voltage (mV)
-2
IO
V
-4
-6
0246810
T = -40°C
V
Common mode voltage (V)
ICM
TS7221 Electrical characteristics
Figure 7. T
4
T
=+25°C
AMB
R
=10kΩ & CL=50pF
L
3
2
1
(µs) with 10mV overdrive
PLH
T
0
Figure 9. T
4
T
=+25°C
AMB
=10kΩ & CL=50pF
R
L
3
PLH
vs V
at VCC=10V and
icm
Figure 8. T
10 mV overdrive
0510
Common mode voltage (V)
PLH
vs V
at VCC= 5 V and 10 mV
icm
Figure 10. T
overdrive
PLH
vs V
at VCC= 10 V and
icm
100 mV overdrive
4
T
=+25°C
AMB
=10kΩ & CL=50pF
R
L
3
2
1
(µs) with 100mV overdrive
PLH
T
0
0510
Common mode voltage (V)
PLH
vs V
at VCC=5V and
icm
100 mV overdrive
4
T
=+25°C
AMB
=10kΩ & CL=50pF
R
L
3
2
1
(µs) with 10mV overdrive
PLH
T
0
0.0 2.5 5.0
Figure 11. T
5
4
3
2
(µs) with 10mV overdrive
1
PHL
T
0
Common mode voltage (V)
PHL
vs V
at VCC= 10 V and
icm
Figure 12. T
10 mV overdrive
T
=+25°C
AMB
=10kΩ & CL=50pF
R
L
0510
Common mode voltage (V)
2
1
(µs) with 100mV overdrive
PLH
T
0
0.0 2.5 5.0
Common mode voltage (V)
PHL
vs V
at VCC= 10 V and
icm
100 mV overdrive
5
4
3
2
1
(µs) with 100mV overdrive
PHL
T
0
0510
Common mode voltage (V)
T
=+25°C
AMB
=10kΩ & CL=50pF
R
L
7/13
Electrical characteristics TS7221
Figure 13. T
3
2
1
(µs) with 10mV overdrive
PHL
T
0
0.0 2.5 5.0
PHL
vs V
at VCC=5V and 10 mV
icm
overdrive
Common mode voltage (V)
T
=+25°C
AMB
=10kΩ & CL=50pF
R
L
Figure 14. T
3
2
1
(µs) with 100mV overdrive
PHL
T
0
0.0 2.5 5.0
PHL
vs V
at VCC=5V and
icm
100 mV overdrive
Common mode voltage (V)
T
=+25°C
AMB
=10kΩ & CL=50pF
R
L
8/13
TS7221 Package information
3 Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
9/13
Package information TS7221
3.1 SOT23-5 package information
Figure 15. SOT23-5L package mechanical drawing
Table 6. SOT23-5L package mechanical data
Dimensions
Ref.
Min. Typ. Max. Min. Typ. Max.
A 0.90 1.20 1.45 0.035 0.047 0.057
A1 0.15 0.006
A2 0.90 1.05 1.30 0.035 0.041 0.051
B 0.35 0.40 0.50 0.013 0.015 0.019
C 0.09 0.15 0.20 0.003 0.006 0.008
D 2.80 2.90 3.00 0.110 0.114 0.118
D1 1.90 0.075
e 0.95 0.037
E 2.60 2.80 3.00 0.102 0.110 0.118
F 1.50 1.60 1.75 0.059 0.063 0.069
L 0.10 0.35 0.60 0.004 0.013 0.023
K 0 degrees 10 degrees
Millimeters Inches
10/13
TS7221 Ordering information
4 Ordering information
Table 7. Order codes
Order code Temperature range Package Packing Marking
TS7221AILT
-40°C, +85°C SOT23-5L Tape & reel
TS7221BILT K519
K518
11/13
Revision history TS7221
5 Revision history
Table 8. Document revision history
Date Revision Changes
01-Dec-2002 1 Initial release
Update of datasheet presentation and format.
Change of T
to Pb-free package.
Corrections to V
01-Sep-2005 2
tables.
Addition of Pb-free information in Section 3: Package information on
page 9.
Correction to package mechanical data given in
Figure 15 on page 10.
26-Mar-2007 3
Added automotive grade part numbers in Section 4: Ordering
information on page 11.
05-Jul-2007 4 Corrected automotive grade part numbers in Table 7: Order codes.
Added notes for ESD in Table 1: Absolute maximum ratings.
Added Rthja and Rthjc parameters in Table 1: Absolute maximum
ratings.
27-Mar-2009 5
Removed power dissipation parameter (P
maximum ratings.
Updated package information in Section 3.1.
Removed automotive grade part numbers in Table 7: Order codes.
temperature in Table 1 on page 2, to reflect change
lead
upper rail parameters in Electrical characteristics
icm
) in Table 1: Absolute
D
12/13
TS7221
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