SGM8708
Micro-Power, RRIO, 1.8V, Dual Push-Pull Output
Comparator with Integrated Voltage Reference
GENERAL DESCRIPTION
The SGM8708 is a low power comparator with a typical
power supply current of 2.2µA. It features an uncommitted
on-chip voltage reference, comparator input common mode
range of 200mV beyond the supply rails, and single-supply
operation from 1.8V to 5.5V. The integrated 1.2V series
voltage reference offers low 42µV/℃ drift, is stable with up
to 10nF capacitive load, and can source up to 2mA (TYP) of
output current.
Designed to operate over a wide range of supply voltages,
from 1.8V to 5.5V, with guaranteed operation at 1.8V and
5.0V, the SGM8708 is ideal for use in a variety of
battery-powered applications. With rail-to-rail input common
mode voltage range, the SGM8708 is well suited for
single-supply operation. Its small packages make this
device ideal for use in handheld electronics and mobile
phone applications.
Featuring a push-pull output stage and having a latch
enable input (
LE
), the SGM8708 allows for operation with
absolute minimum power consumption when driving any
capacitive or resistive load.
SGM8708 is available in Green SOT-23-8 and SOIC-8
packages. It is rated over the -40℃ to +85℃ temperature
range.
V
REF
V
IN+
-V
S
V
OUT
1
8
FEATURES
●
Low Power Consumption:
2.2µA (TYP) at V
S
= 1.8V
●
Wide Supply Voltage Range: 1.8V to 5.5V
●
Push-Pull Output Current Drive:
18mA (TYP) at V
S
= 5V
●
Rail-to-Rail Input
●
V
OUT
and V
OUT
Dual Outputs
●
Latch Function Included
●
Integrated 1.2V Voltage Reference
●
-40℃ to +85℃ Operating Temperature Range
●
Available in Green SOT-23-8 and SOIC-8
Packages
PIN CONFIGURATIONS
(TOP VIEW)
V
OUT
-V
S
V
IN+
V
REF
1
8
V
OUT
+V
S
LE
V
IN-
2
7
+
3
6
4
SOT-23-8
5
V
IN-
LE
+V
S
V
OUT
APPLICATIONS
RC Timers
Window Detectors
IR Receiver
Multivibrators
Alarm and Monitoring Circuits
2
7
+
3
6
4
SOIC-8
5
SG Micro Corp
www.sg-micro.com
REV. A. 1
SGM8708
Micro-Power, RRIO, 1.8V, Dual Push-Pull Output
Comparator with Integrated Voltage Reference
PACKAGE/ORDERING INFORMATION
MODEL
PIN-
PACKAGE
SOT-23-8
SGM8708
SOIC-8
-40℃ to +85℃
SGM8708YS8G/TR
SPECIFIED
TEMPERATURE
RANGE
-40℃ to +85℃
ORDERING
NUMBER
SGM8708YN8G/TR
PACKAGE
MARKING
SH7XX
SGM
8708YS8
XXXXX
PACKAGE
OPTION
Tape and Reel, 3000
Tape and Reel, 2500
NOTE:
XX
= Date Code.
XXXXX
= Date Code and Vendor Code.
MARKING INFORMATION
SH7 X X
Date code - Month ("A" = Jan. "B" = Feb.
…
"L" = Dec.)
Date code - Year ("A" = 2010, "B" = 2011
…)
Chip I.D.
For example: SH7CA (2012, January)
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, +V
S
to -V
S
...…………………………….……..6V
V
IN
Differential..……………………………………….±(+V
S
- (-V
S
))
Voltage at Input/Output Pins………..(-V
S
) - 0.3V to (+V
S
) + 0.3V
Operating Temperature Range............................-40℃ to +85℃
Junction Temperature....................................................... 150℃
Storage Temperature Range..............................-65℃ to +150℃
Lead Temperature (Soldering, 10s) ..................................260℃
ESD Susceptibility
HBM..................................................................................4000V
MM......................................................................................400V
CAUTION
This integrated circuit can be damaged by ESD if you don’t pay
attention to ESD protection. SGMICRO recommends that all
integrated circuits be handled with appropriate precautions.
Failure to observe proper handling and installation procedures
can cause damage. ESD damage can range from subtle
performance degradation to complete device failure. Precision
integrated circuits may be more susceptible to damage because
very small parametric changes could cause the device not to
meet its published specifications.
SGMICRO reserves the right to make any change in circuit
design, specification or other related things if necessary without
notice at any time. Please contact SGMICRO sales office to get
the latest datasheet.
NOTE:
Stresses beyond those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device. These
are stress ratings only, and functional operation of the device at
these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied.
Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
SG Micro Corp
www.sg-micro.com
2
SGM8708
Micro-Power, RRIO, 1.8V, Dual Push-Pull Output
Comparator with Integrated Voltage Reference
ELECTRICAL CHARACTERISTICS: V
S
= 1.8V
(At T
A
= +25℃, +V
S
= 1.8V, -V
S
= 0V, V
LE
= 1.8V, V
CM
= +V
S
/2, unless otherwise noted.)
PARAMETER
Supply Current
Input Offset Voltage
Input Offset Average Drift
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Power Supply Ramp-Up Rate
(1)
SYMBOL
I
S
V
OS
I
O
= 0
V
CM
= 0V
V
CM
= 1.8V
CONDITIONS
MIN
TYP
2.2
0.5
0.5
2
MAX
3.8
3
3
UNITS
µA
mV
µV/℃
dB
dB
V/s
V
CMRR
PSRR
V
CM
= 0V to 1.8V
V
S
= 1.8V to 5.5V, V
CM
= 0V
55
74
5
68
102
Latch Enable Pin High Input Voltage
Latch Enable Pin Low Input Voltage
Latch Enable Pin Bias Current
Large Signal Voltage Gain
V
IH
V
IL
I
IH
, I
IL
A
VO
I
O
= 500μA
V
LE
= 0V or V
LE
= 1.8V, V
CM
= 0V
1.0
0.25
3
100
1.617
1.572
1.412
1.330
84
124
163
173
249
347
1.15
1.0
-3.5
-2.0
-1.4
11.7
5.6
24.2
14.7
168
174
75
50
0.3
2
1.525
1.675
V
nA
dB
Output Swing High
V
OH
V
OUT
,
V
OUT
I
O
= 500μA, -40℃
≤
T
A
≤
+85℃
I
O
= 1mA
I
O
= 1mA, -40℃
≤
T
A
≤
+85℃
I
O
= -500μA
V
Output Swing Low
V
OL
V
OUT
,
V
OUT
I
O
= -500μA, -40℃
≤
T
A
≤
+85℃
I
O
= -1mA
I
O
= -1mA, -40℃
≤
T
A
≤
+85℃
Source
mV
Output Current
I
OUT
V
OUT
,
V
OUT
Source, -40℃
≤
T
A
≤
+85℃
Sink
Sink, -40℃
≤
T
A
≤
+85℃
mA
Propagation Delay (High to Low)
V
OUT
,
V
OUT
V
OUT
,
V
OUT
t
RISE
V
OUT
,
V
OUT
V
OUT
,
V
OUT
Overdrive = 10mV
Overdrive = 100mV
Overdrive = 10mV
Overdrive = 100mV
Overdrive = 10mV, C
L
= 30pF, R
L
= 1MΩ
Overdrive = 100mV, C
L
= 30pF, R
L
= 1MΩ
Overdrive = 10mV, C
L
= 30pF, R
L
= 1MΩ
Overdrive = 100mV, C
L
= 30pF, R
L
= 1MΩ
f = 0.1Hz to 10Hz
μs
Propagation Delay (Low to High)
μs
Rise Time
ns
Fall Time
Noise of V
REF
VOLTAGE REFERENCE
Reference Voltage
Reference Voltage Drift
Reference Output Current (Source)
t
FALL
ns
mV
P-P
V
REF
I
REF
= 0mA
1.182
1.200
42
2
1.218
V
µV/℃
mA
SG Micro Corp
www.sg-micro.com
3
SGM8708
Micro-Power, RRIO, 1.8V, Dual Push-Pull Output
Comparator with Integrated Voltage Reference
ELECTRICAL CHARACTERISTICS: V
S
= 5.0V
(At T
A
= +25℃, +V
S
= 5V, -V
S
= 0V, V
LE
= 5V, V
CM
= +V
S
/2, unless otherwise noted.)
PARAMETER
Supply Current
Input Offset Voltage
Input Offset Average Drift
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Power Supply Ramp-Up Rate
(1)
SYMBOL
I
S
V
OS
I
O
= 0
V
CM
= 0V
V
CM
= 5V
CONDITIONS
MIN
TYP
2.3
0.5
0.5
2
MAX
3.9
3
3
UNITS
µA
mV
µV/℃
dB
dB
V/s
V
CMRR
PSRR
V
CM
= 0V to 5V
V
S
= 1.8V to 5.5V, V
CM
= 0V
63
74
5
76
102
Latch Enable Pin High Input Voltage
Latch Enable Pin Low Input Voltage
Latch Enable Pin Bias Current
Latch Propagation Delay
Large Signal Voltage Gain
V
IH
V
IL
I
IH
, I
IL
t
LPD
A
VO
I
O
= 500μA
V
LE
= 0V or V
LE
= 5V, V
CM
= 0V
V
S
= 3V
2
0.8
60
90
110
4.935
4.926
4.874
4.855
54
72
79
106
140
154
14.0
10.5
-18
-15.5
-12.5
12.7
5.6
38.1
29.5
39
40
33
30
0.32
18
4.904
4.952
V
nA
ns
dB
Output Swing High
V
OH
V
OUT
,
V
OUT
I
O
= 500μA, -40℃
≤
T
A
≤
+85℃
I
O
= 1mA
I
O
= 1mA, -40℃
≤
T
A
≤
+85℃
I
O
= -500μA
V
Output Swing Low
V
OL
V
OUT
,
V
OUT
I
O
= -500μA, -40℃
≤
T
A
≤
+85℃
I
O
= -1mA
I
O
= -1mA, -40℃
≤
T
A
≤
+85℃
Source
mV
Output Current
I
OUT
V
OUT
,
V
OUT
Source, -40℃
≤
T
A
≤
+85℃
Sink
Sink, -40℃
≤
T
A
≤
+85℃
mA
Propagation Delay (High to Low)
V
OUT
,
V
OUT
V
OUT
,
V
OUT
t
RISE
V
OUT
,
V
OUT
V
OUT
,
V
OUT
Overdrive = 10mV
Overdrive = 100mV
Overdrive = 10mV
Overdrive = 100mV
Overdrive = 10mV, C
L
= 30pF, R
L
= 1MΩ
Overdrive = 100mV, C
L
= 30pF, R
L
= 1MΩ
Overdrive = 10mV, C
L
= 30pF, R
L
= 1MΩ
Overdrive = 100mV, C
L
= 30pF, R
L
= 1MΩ
f = 0.1Hz to 10Hz
μs
Propagation Delay (Low to High)
μs
Rise Time
ns
Fall Time
Noise of V
REF
VOLTAGE REFERENCE
Reference Voltage
Reference Voltage Drift
Reference Output Current (Source)
t
FALL
ns
mV
P-P
V
REF
I
REF
= 0mA
1.182
1.200
41
2
1.218
V
µV/℃
mA
NOTE:
1. If the power supply ramp-up rate is lower than 5V/s, the reference voltage output is not guaranteed to start up.
SG Micro Corp
www.sg-micro.com
4
SGM8708
Micro-Power, RRIO, 1.8V, Dual Push-Pull Output
Comparator with Integrated Voltage Reference
TYPICAL PERFORMANCE CHARACTERISTICS
Propagation Delay vs. Input Common Mode Voltage
24
Propagation Delay H-L (µs)
Propagation Delay vs. Input Common Mode Voltage
70
Propagation Delay L-H (µs)
60
50
40
30
20
10
0
V
S
= 5V
V
OD
= 20mV
0
1
2
3
4
5
+85℃
+25℃
-40℃
20
16
12
8
4
0
0
1
2
3
4
5
Input Common Mode Voltage (V)
V
S
= 5V
V
OD
= 20mV
+85℃
-40℃
+25℃
Input Common Mode Voltage (V)
18
Propagation Delay H-L (µs)
15
12
9
6
3
0
1
Propagation Delay vs. Supply Voltage
-40℃
70
Propagation Delay L-H (µs)
60
50
40
30
20
10
Propagation Delay vs. Supply Voltage
V
CM
= V
S
/2
V
OD
= 20mV
-40℃
+25℃
+25℃
+85℃
V
CM
= V
S
/2
V
OD
= 20mV
2
3
4
5
6
+85℃
1
2
3
4
5
6
Supply Voltage (V)
Supply Voltage (V)
Propagation Delay vs. Overdrive
25
Propagation Delay H-L (μs)
20
15
10
5
0
-500
+85℃
+25℃
Propagation Delay L-H (μs)
Propagation Delay vs. Overdrive
80
70
60
50
40
30
20
10
+85℃
0
100
200
300
Overdrive (mV)
400
500
+25℃
-40℃
V
S
= 5V
V
CM
= 0.5V
V
S
= 5V
V
CM
= 0.5V
-40℃
-400
-300
-200
Overdrive (mV)
-100
0
SG Micro Corp
www.sg-micro.com
5
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