Datasheet
Comparators
Input Full Swing, Push-pull Output
Low Supply Current CMOS Comparators
BU5255HFV
BU5255SHFV
General Description
Key Specifications
Operating Supply Voltage:
Single Supply
Split Supply
Supply Current:
Temperature Range:
BU5255HFV
BU5255SHFV
Input Offset Current:
Input Bias Current:
BU5255HFV is input full swing, push-pull output CMOS
comparator. BU5255SHFV have an expanded operating
temperature range. These features low operating supply
voltage of +1.8V to +5.5V(single supply), low supply
current and extremely low input bias current.
Features
Low Operating Supply Voltage
Low Supply Current
Input Full Swing
Push-pull Output
Wide Operating Temperature Range(BU5255SHFV)
Low Input Bias Current
Packages
HVSOF5
+1.8V to +5.5V
±0.9V to ±2.75V
6.5µA(Typ)
-40°C to +85°C
-40°C to +105°C
1pA (Typ)
1pA (Typ)
jW(Typ) x D(Typ) x H(Max)
1.60mm x 1.60mm x 0.60mm
Applications
Limit Comparators
Battery Monitor
Multivibrators
Consumer Electronics
Pin Configuration
BU5255HFV, BU5255SHFV: HVSOF5
INVSS
5
1
2
VDD
Pin No.
Pin Name
1
IN-
2
VSS
+
IN+
3
4
OUT
3
IN+
4
OUT
5
VDD
Package
HVSOF5
BU5255HFV
BU5255SHFV
○Product structure：Silicon monolithic integrated circuit
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Datasheet
BU5255HFV BU5255SHFV
Ordering Information
B
U
5
2
5
5
x
x
x
x
-
Package
HFV : HVSOF5
Part Number
BU5255HFV
BU5255SHFV
x
x
Packaging and Forming Specification
TR: Embossed Tape and Reel
Line-up
Package
Topr
Orderable Part Number
-40°C to +85°C
HVSOF5
Reel of 3000
BU5255HFV-TR
-40°C to +105°C
HVSOF5
Reel of 3000
BU5255SHFV-TR
Absolute Maximum Ratings (TA=25°C)
Parameter
Supply Voltage
BU5255HFV
BU5255SHFV
VDD - VSS
Power Dissipation
Differential Input Voltage
Ratings
Symbol
(Note 3)
Input Common-mode
Voltage Range
Input Current (Note 4)
Unit
+7
V
PD
0.54
(Note 1,2)
W
VID
VDD - VSS
V
VICM
(VSS-0.3) to (VDD+0.3)
V
II
±10
mA
Operating Supply Voltage
Vopr
+1.8 to +5.5
V
Operating Temperature
Topr
Storage Temperature
Tstg
-55 to +125
°C
Maximum
Junction Temperature
TJmax
+125
°C
-40 to +85
-40 to +105
°C
(Note 1) To use at temperature above TA=25C reduce 5.4mW/°C.
(Note 2) Mounted on a FR4 glass epoxy PCB 70mm×70mm×1.6mm (copper foil area less than 3%).
(Note 3) The voltage difference between inverting input and non-inverting input is the differential input voltage.
Then input terminal voltage is set to more than VSS.
(Note 4) An excessive input current will flow when input voltages of more than VDD+0.6V or less than VSS-0.6V are applied.
The input current can be set to less than the rated current by adding a limiting resistor.
Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open
circuit between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case
the IC is operated over the absolute maximum ratings.
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Datasheet
BU5255HFV BU5255SHFV
Electrical Characteristics
○BU5255HFV, BU5255SHFV（Unless otherwise specified VDD=+3V, VSS=0V, TA=25°C）
Limit
Temperature
Parameter
Symbol
Unit
Range
Min
Typ
Max
Conditions
Input Offset Voltage (Note 5)
VIO
25°C
-
1
6
mV
-
Input Offset Current (Note 5)
IIO
25°C
-
1
-
pA
-
Input Bias Current (Note 5)
IB
25°C
-
1
-
pA
-
Supply Current (Note 6)
IDD
Maximum Output Voltage(High)
25°C
-
6.5
15
Full range
-
-
30
VOH
25°C
VDD-0.1
-
Maximum Output Voltage(Low)
VOL
25°C
-
Large Signal Voltage Gain
AV
25°C
VICM
Common-mode Rejection Ratio
μA
RL=∞
-
V
RL=10kΩ
-
VSS+0.1
V
RL=10kΩ
-
90
-
dB
RL=10kΩ
25°C
0
-
3
V
VSS to VDD
CMRR
25°C
-
80
-
dB
-
Power Supply Rejection Ratio
PSRR
25°C
-
80
-
dB
-
Output Source Current (Note 7)
ISOURCE
25°C
1.5
3.5
-
mA
OUT=VDD-0.4V
ISINK
25°C
2.5
5
-
mA
OUT=VSS+0.4V
Output Rise Time
tR
25°C
-
50
-
ns
Output Fall Time
tF
25°C
-
20
-
ns
Propagation Delay L to H
tPLH
25°C
-
1.6
-
µs
Propagation Delay H to L
tPHL
25°C
-
0.5
-
µs
Input Common-mode
Voltage Range
Output Sink Current (Note 7)
CL=15pF, IN-=1.5V
100mV Overdrive
CL=15pF, IN-=1.5V
100mV Overdrive
CL=15pF, IN-=1.5V
100mV Overdrive
CL=15pF, IN-=1.5V
100mV Overdrive
(Note 5) Absolute value
(Note 6) Full range: BU5255HFV: TA=-40°C to +85°C BU5255SHFV: TA=-40°C to +105°C
(Note 7) Under the high temperature environment, consider the power dissipation of IC when selecting the output current.
When the terminal short circuits are continuously output, the output current is reduced to climb to the temperature inside IC.
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Datasheet
BU5255HFV BU5255SHFV
Description of Electrical Characteristics
Described below are descriptions of the relevant electrical terms used in this datasheet. Items and symbols used are also
shown. Note that item name and symbol and their meaning may differ from those on another manufacturer’s document or
general document.
1. Absolute Maximum Ratings
Absolute maximum rating items indicate the condition which must not be exceeded. Application of voltage in excess of absolute
maximum rating or use out of absolute maximum rated temperature environment may cause deterioration of characteristics.
(1) Supply Voltage (VDD/VSS)
Indicates the maximum voltage that can be applied between the VDD terminal and VSS terminal without
deterioration or destruction of characteristics of internal circuit.
(2) Differential Input Voltage (VID)
Indicates the maximum voltage that can be applied between non-inverting and inverting terminals without damaging
the IC.
(3) Input Common-mode Voltage Range (VICM)
Indicates the maximum voltage that can be applied to the non-inverting and inverting terminals without deterioration
or destruction of electrical characteristics. Input common-mode voltage range of the maximum ratings does not assure
normal operation of IC. For normal operation, use the IC within the input common-mode voltage range characteristics.
(4) Power Dissipation (PD)
Indicates the power that can be consumed by the IC when mounted on a specific board at the ambient temperature 25°C
(normal temperature). As for package product, PD is determined by the temperature that can be permitted by the IC in
the package (maximum junction temperature) and the thermal resistance of the package.
2. Electrical Characteristics
(1) Input Offset Voltage (VIO)
Indicates the voltage difference between non-inverting terminal and inverting terminals. It can be translated into the
input voltage difference required for setting the output voltage at 0 V.
(2) Input Offset Current (IIO)
Indicates the difference of input bias current between the non-inverting and inverting terminals.
(3) Input Bias Current (IB)
Indicates the current that flows into or out of the input terminal. It is defined by the average of input bias currents at
the non-inverting and inverting terminals.
(4) Supply Current (IDD)
Indicates the current that flows within the IC under specified no-load conditions.
(5) Maximum Output Voltage(High) / Maximum Output Voltage(Low) (VOH/VOL)
Indicates the voltage range of the output under specified load condition. It is typically divided into maximum output
voltage High and low. Maximum output voltage high indicates the upper limit of output voltage. Maximum output
voltage low indicates the lower limit.
(6) Large Signal Voltage Gain (AV)
Indicates the amplifying rate (gain) of output voltage against the voltage difference between non-inverting terminal
and inverting terminal. It is normally the amplifying rate (gain) with reference to DC voltage.
Av = (Output voltage) / (Differential Input voltage)
(7) Input Common-mode Voltage Range (VICM)
Indicates the input voltage range where IC normally operates.
(8) Common-mode Rejection Ratio (CMRR)
Indicates the ratio of fluctuation of input offset voltage when the input common mode voltage is changed. It is
normally the fluctuation of DC.
CMRR = (Change of Input common-mode voltage)/(Input offset fluctuation)
(9) Power Supply Rejection Ratio (PSRR)
Indicates the ratio of fluctuation of input offset voltage when supply voltage is changed.
It is normally the fluctuation of DC.
PSRR= (Change of power supply voltage)/(Input offset fluctuation)
(10) Output Source Current/ Output Sink Current (ISOURCE / ISINK)
The maximum current that can be output from the IC under specific output conditions. The output source current
indicates the current flowing out from the IC, and the output sink current indicates the current flowing into the IC.
(11) Output Rise Time /Output Fall Time (tR/tF)
Indicates the time required for an output voltage step to change from 90% to 10% of its final value.
(12) Propagation Delay Time L to H /Propagation Delay Time H to L (tPLH/tPHL)
Indicates the time to reach 50% of the output voltage after the step voltage is applied at the input pin.
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Datasheet
BU5255HFV BU5255SHFV
Typical Performance Curves
0.8
0.8
0.6
0.6
Power Dissipation [W]
Power Dissipation [W]
○BU5255HFV, BU5255SHFV
BU5255HFV
0.4
BU5255SHFV
0.4
0.2
0.2
0.0
0
25
0.0
85
50
75
100
Ambient Temperature [°C]
105
0
125
Figure 1.
Power Dissipation vs Ambient Temperature
(Derating Curve)
12
10
10
85°C
Supply Current [μA]
Supply Current [μA]
50
75
100
Ambient Temperature [°C]
125
Figure 2.
Power Dissipation vs Ambient Temperature
(Derating Curve)
12
105°C
25
8
25°C
6
4
8
5.5V
6
3.0V
1.8V
4
-40°C
2
2
0
0
1
2
3
4
Supply Voltage [V]
5
6
-50
-25
0
25
50
75
Ambient Temperature [°C]
100
125
Figure 4.
Supply Current vs Ambient Temperature
Figure 3.
Supply Current vs Supply Voltage
(*)The above characteristics are measurements of typical sample, they are not guaranteed.
BU5255HFV: -40C to +85C BU5255SHFV: -40C to +105C
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BU5255HFV BU5255SHFV
Typical Performance Curves - continued
○BU5255HFV, BU5255SHFV
6
Maximum Output Voltage (High) [V]
Maximum Output Voltage (High) [V]
6
5
4
105°C
85°C
25°C
3
-40°C
2
1
4
3.0V
3
1.8V
2
1
0
0
1
2
3
4
Supply Voltage [V]
5
-50
6
Figure 5.
Maximum Output Voltage (High) vs Supply Voltage
(RL=10kΩ)
-25
0
25
50
75
Ambient Temperature [°C]
100
125
Figure 6.
Maximum Output Voltage (High) vs Ambient Temperature
(RL=10kΩ)
50
50
Maximum Output Voltage (Low) [mV]
Maximum Output Voltage (Low) [mV]
5.5V
5
40
30
20
105°C
25°C
85°C
10
40
30
20
5.5V
10
1.8V
-40°C
0
-50
0
1
2
3
4
Supply Voltage [V]
5
6
-25
3.0V
0
25
50
75
Ambient Temperature [°C]
100
125
Figure 8.
Maximum Output Voltage (Low) vs Ambient Temperature
(RL=10kΩ)
Figure 7.
Maximum Output Voltage (Low) vs Supply Voltage
(RL=10kΩ)
(*)The above characteristics are measurements of typical sample, they are not guaranteed.
BU5255HFV: -40C to +85C BU5255SHFV: -40C to +105C
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BU5255HFV BU5255SHFV
Typical Performance Curves - continued
○BU5255HFV, BU5255SHFV
16
16
14
14
Output Source Current [mA]
Output Source Current [mA]
-40°C
12
12
25°C
10
10
8
85°C
105°C
6
4
8
5.5V
6
3.0V
4
1.8V
2
2
0
0.0
0.5
1.0
1.5
2.0
Output Voltage [V]
2.5
0
-50
3.0
Figure 9.
Output Source Current vs Output Voltage
(VDD=3 V)
-25
0
25
50
75
Ambient Temperature [°C]
100
125
Figure 10.
Output Source Current vs Ambient Temperature
(OUT=VDD-0.4V)
20
20
15
Output Sink Current [mA]
Output Sink Current [mA]
-40°C
25°C
10
85°C
105°C
5
15
10
5.5V
3.0V
5
1.8V
0
0.0
0.5
1.0
1.5
2.0
Output Voltage [V]
2.5
0
-50
3.0
Figure 11.
Output Sink Current vs Output Voltage
(VDD=3V)
-25
0
25
50
75
Ambient Temperature [°C]
100
125
Figure 12.
Output Sink Current vs Ambient Temperature
(OUT=VSS+0.4V)
(*)The above characteristics are measurements of typical sample, they are not guaranteed.
BU5255HFV: -40C to +85C BU5255SHFV: -40C to +105C
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BU5255HFV BU5255SHFV
Typical Performance Curves - continued
○BU5255HFV, BU5255SHFV
7.5
7.5
5.0
5.0
85°C
2.5
Input Offset Voltage [mV]
10.0
Input Offset Voltage [mV]
10.0
105°C
0.0
25°C
-40°C
-2.5
-5.0
2.5
5.5V
0.0
1.8V
3.0V
-2.5
-5.0
-7.5
-7.5
-10.0
-10.0
1
2
3
4
Supply Voltage [V]
5
-50
6
-25
0
25
50
75
Ambient Temperature [°C]
100
125
Figure 14.
Input Offset Voltage vs Ambient Temperature
(VICM=VDD, EK=-VDD/2)
Figure 13.
Input Offset Voltage vs Supply Voltage
(VICM=VDD, EK=-VDD/2)
10.0
160
Large Signal Voltage Gain [dB]
Input Offset Voltage [mV]
7.5
5.0
105°C
2.5
85°C
25°C
0.0
-40°C
-2.5
-5.0
140
85°C
120
105°C
-40°C
100
25°C
80
-7.5
-10.0
60
-1
0
1
2
Input Voltage [V]
3
1
4
Figure 15.
Input Offset Voltage vs Input Voltage
(VDD=3V)
2
3
4
Supply Voltage [V]
5
6
Figure 16.
Large Signal Voltage Gain vs Supply Voltage
(*)The above characteristics are measurements of typical sample, they are not guaranteed.
BU5255HFV: -40C to +85C BU5255SHFV: -40C to +105C
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BU5255HFV BU5255SHFV
Typical Performance Curves - continued
○BU5255HFV, BU5255SHFV
120
Common-mode Rejection Ratio [dB]
Large Signal Voltage Gain [dB]
160
140
1.8V
120
3.0V
100
5.5V
80
100
-40°C
105°C
60
85°C
40
20
0
60
-50
-25
0
25
50
75
Ambient Temperature [°C]
100
125
1
Figure 17.
Large Signal Voltage Gain vs Ambient Temperature
2
3
4
Supply Voltage [V]
5
6
Figure 18.
Common-mode Rejection Ratio vs Supply Voltage
120
140
100
5.5V
Power Supply Rejection Ratio [dB]
Common-mode Rejection Ratio [dB]
25°C
80
3.0V
80
60
1.8V
40
20
120
100
0
-50
-25
0
25
50
75
Ambient Temperature [°C]
100
80
60
40
20
0
-50
125
-25
0
25
50
75
Ambient Temperature [°C]
100
125
Figure 20.
Power Supply Rejection Ratio vs Ambient Temperature
Figure 19.
Common-mode Rejection Ratio vs Ambient Temperature
(*)The above characteristics are measurements of typical sample, they are not guaranteed.
BU5255HFV: -40C to +85C BU5255SHFV: -40C to +105C
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BU5255HFV BU5255SHFV
Typical Performance Curves - continued
○BU5255HFV, BU5255SHFV
2.0
Propagation Delay H to L [µs]
Propagation Delay L to H [µs]
2.0
5.5V
1.5
3.0V
1.0
1.8V
0.5
0.0
-50
-25
0
25
50
75
Ambient Temperature [°C]
100
125
1.5
5.5V
1.0
3.0V
1.8V
0.5
0.0
-50
Figure 21.
Propagation Delay L to H vs Ambient Temperature
(CL=15pF, IN-=1.5V
100mV Overdrive)
-25
0
25
50
75
Ambient Temperature [°C]
100
125
Figure 22.
Propagation Delay H to L vs Ambient Temperature
(CL=15pF, IN-=1.5V
100mV Overdrive)
(*)The above characteristics are measurements of typical sample, they are not guaranteed.
BU5255HFV: -40C to +85C BU5255SHFV: -40C to +105C
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BU5255HFV BU5255SHFV
Application Information
NULL Method Conditions for Test circuit 1
VDD, VSS, EK, VICM Unit:V
Parameter
Input Offset Voltage
VF
SW1
SW2
SW3
VDD
VSS
EK
VICM
Calculation
VF1
ON
ON
OFF
3
0
-0.1
3
1
ON
ON
ON
3
0
0.3
2
ON
ON
OFF
3
0
VF6
ON
ON
OFF
1.8
0
VF7
ON
ON
OFF
5.5
0
VF2
Large Signal Voltage Gain
VF3
VF4
Common-mode Rejection Ratio
(Input Common-mode Voltage Range)
VF5
Power Supply Rejection Ratio
- Calculation 1. Input Offset Voltage (VIO)
VIO =
2. Large Signal Voltage Gain (AV)
Av = 20Log
3. Common-mode Rejection Ratio (CMRR)
CMRR = 20Log
4. Power Supply Rejection Ratio (PSRR)
PSRR = 20Log VDD × (1+ RF/RS)
|VF7 - VF6|
|VF1|
1 + RF/RS
-0.3
-2.7
-0.1
-0.1
0
3
3
0.3
4
[V]
EK × (1+RF/RS)
|VF3 - VF2|
[dB]
VICM × (1+RF/RS)
|VF5 - VF4|
[dB]
[dB]
0.1μF
RF=50kΩ
SW1
RS=50Ω
500kΩ
VDD
15V
EK
RI=1MΩ
0.01μF
Vo
500kΩ
0.015μF 0.015μF
DUT
SW3
RS=50Ω
1000pF
RI=1MΩ
RL
VICM
50kΩ
NULL
SW2
VRL
VSS
V VF
-15V
Figure 23. Test Circuit 1
Application Information - continued
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Switch Conditions for Test Circuit 2
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
Supply Current
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF
Maximum Output Voltage (RL=10kΩ)
OFF
ON
ON
ON
OFF
OFF
ON
OFF
Output Current
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
Response Time
ON
OFF
ON
OFF
ON
OFF
OFF
ON
SW No.
VDD
＋
SW1
SW2
－
SW3
SW4
SW5
RL
CL
SW6
SW7
SW8
VIN
VSS
IN+
INOUT
Figure 24. Test Circuit 2
Input Voltage
Input Voltage
1.6V
1.6V
1.5V
1.5V
100mV Overdrive
Vre
100mV Overdrive
1.4V
1.4V
t
t
Input Wave
Input Wave
Output Voltage (L-H)
Output Voltage (H-L)
tPLH
3V
tF
3V
90%
50%
1.5V
90%
50%
1.5V
10%
10%
0V
0V
tR
Output Wave
tPHL
t
Output Wave
t
Figure 25. Response Time Input and Output Wave
Power Dissipation
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BU5255HFV BU5255SHFV
Power dissipation (total loss) indicates the power that the IC can consume at TA=25°C (normal temperature). As the IC
consumes power, it heats up, causing its temperature to be higher than the ambient temperature. The allowable
temperature that the IC can accept is limited. This depends on the circuit configuration, manufacturing process, and
consumable power.
Power dissipation is determined by the allowable temperature within the IC (maximum junction temperature) and the
thermal resistance of the package used (heat dissipation capability). Maximum junction temperature is typically equal to the
maximum storage temperature. The heat generated through the consumption of power by the IC radiates from the mold
resin or lead frame of the package. Thermal resistance, represented by the symbol θJA°C/W, indicates this heat dissipation
capability. Similarly, the temperature of an IC inside its package can be estimated by thermal resistance.
Figure 26(a) shows the model of the thermal resistance of the package. The equation below shows how to compute for the
Thermal resistance (θJA), given the ambient temperature (TA), maximum junction temperature (TJmax), and power dissipation
(PD).
θJA = (TJmax-TA) / PD
°C/W
The derating curve in Figure 26(b) indicates the power that the IC can consume with reference to ambient temperature.
Power consumption of the IC begins to attenuate at certain temperatures. This gradient is determined by Thermal
resistance (θJA), which depends on the chip size, power consumption, package, ambient temperature, package condition,
wind velocity, etc. This may also vary even when the same of package is used. Thermal reduction curve indicates a
reference value measured at a specified condition. Figure 26(c) and (d) shows the derating curve for BU5255HFV and
BU5255SHFV.
Power Dissipation of LSI [W]
PDmax
Power Dissipation of IC
θJA=(TJmax-TA)/PD C/W
Ambient Temperature TA [ C ]
P2
θJA2
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