OUT ...................................................................50mA
OUT Short-Circuit Duration (V
+
≤ 5.5V) ..... Continuous
Power Dissipation ............................................ 500mW
Operating Temperature Range
LTC1540C ............................................... 0°C to 70°C
LTC1540I .............................................–40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
(DD Package) ..................................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec)................... 300°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
GND
V
–
IN
+
IN
–
1
2
3
4
9
V
–
8 OUT
7 V
+
6 REF
5 HYST
GND 1
V
–
2
IN
+
3
IN
–
4
8
7
6
5
OUT
V
+
REF
HYST
TOP VIEW
GND
V
–
IN
+
IN
–
1
2
3
4
8
7
6
5
OUT
V
+
REF
HYST
DD PACKAGE
8-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 160°C/W (NOTE 2) UNDERSIDE METAL
CONNECTED TO V
–
(PCB CONNECTION OPTIONAL)
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 175°C/W
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 250°C/W
ORDER INFORMATION
LEAD FREE FINISH
LTC1540CDD#PBF
LTC1540IDD#PBF
LTC1540CS8#PBF
LTC1540IS8#PBF
LTC1540CMS8#PBF
LTC1540IMS8#PBF
TAPE AND REEL
LTC1540CDD#TRPBF
LTC1540IDD#TRPBF
LTC1540CS8#TRPBF
LTC1540IS8#TRPBF
LTC1540CMS8#TRPBF
LTC1540IMS8#TRPBF
http://www.linear.com/product/LTC1540#orderinfo
*PART MARKING
LAAS
LAAS
1540
1540I
LTCE
LTADV
PACKAGE DESCRIPTION
8-Lead (3mm × 3mm) Plastic DFN
8-Lead (3mm × 3mm) Plastic DFN
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic MSOP
8-Lead Plastic MSOP
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
1540fb
2
For more information
www.linear.com/LTC1540
LTC1540
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 5V, V
–
= GND = 0V unless otherwise noted.
SYMBOL PARAMETER
Power Supply
V
+
I
CC
Supply Voltage Range
Supply Current
IN
–
– IN
+
= 80mV, HYST = REF C-Grade
,
–
– IN
+
= 80mV, HYST = REF I-Grade
IN
,
V
CM
= 2.5V
LTC1540CMS8/IMS8
I
IN
V
CM
CMRR
PSRR
V
HYST
t
PD
V
OH
V
OL
Reference
V
REF
∆V
REF
Reference Voltage
No Load
(SO-8)/(DFN) Commercial
MS8 Commercial
(SO-8)/(MS8)/(DFN) Industrial
l
l
l
l
l
l
l
l
l
l
l
l
l
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
2.0
TYP
MAX
11.0
UNITS
V
µA
µA
mV
mV
mV
nA
nA
V
mV/V
mV/V
V
µs
µs
V
0.3
0.68
0.71
±12
±15
±16
Comparator
V
OS
Comparator Input Offset Voltage
Input Leakage Current (IN
+
, IN
–
)
Input Leakage Current (HYST)
Comparator Input Common Mode Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Hysteresis Input Voltage Range
Propagation Delay
Output High Voltage
Output Low Voltage
C
OUT
= 100pF
I
O
= – 13mA
I
O
= 1.8mA
Overdrive = 10mV
Overdrive = 100mV
l
l
V
IN+
= V
IN–
= 2.5V
±0.01
±0.02
V
–
0.1
0.1
±1.0
±1.0
V
+
– 1.3V
1
1
REF
V
–
to V
+
– 1.3V
V
+
= 2V to 11V
l
REF – 50mV
60
50
V
+
– 0.4V
GND + 0.4V
1.158
1.156
1.152
1.182
1.182
1.182
0.5
0.5
1.206
1.208
1.212
2.5
1.5
5
V
V
V
V
mV
mV
mV
Load Regulation
0 ≤ I
SOURCE
≤ 100µA
0 ≤ I
SINK
≤ 10µA
1540fb
For more information
www.linear.com/LTC1540
3
LTC1540
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 3V, V
–
= GND = 0V unless otherwise noted.
SYMBOL PARAMETER
Power Supply
V
+
I
CC
Supply Voltage Range
Supply Current
IN
–
– IN
+
= 80mV, HYST = REF C-Grade
,
–
– IN
+
= 80mV, HYST = REF I-Grade
IN
,
V
CM
= 2.5V
LTC1540CMS8/IMS8
I
IN
V
CM
CMRR
PSRR
V
HYST
t
PD
V
OH
V
OL
Reference
V
REF
∆V
REF
Reference Voltage
No Load
(SO-8)/(DFN) Commercial
MS8 Commercial
(SO-8)/(MS8)/(DFN) Industrial
l
l
l
l
l
l
l
l
l
l
l
l
l
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
2
TYP
MAX
11
UNITS
V
µA
µA
mV
mV
mV
nA
nA
V
mV/V
mV/V
V
µs
µs
V
0.28
0.61
0.64
±12
±15
±16
Comparator
V
OS
Comparator Input Offset Voltage
Input Leakage Current (IN
+
, IN
–
)
Input Leakage Current (HYST)
Comparator Input Common Mode
Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Hysteresis Input Voltage Range
Propagation Delay
Output High Voltage
Output Low Voltage
C
OUT
= 100pF
I
O
= –8mA
I
O
= 0.8mA
Overdrive = 10mV
Overdrive = 100mV
l
l
V
IN+
= V
IN–
= 1.5V
±0.01
±0.02
V
–
0.1
0.1
±1
±1
V
+
– 1.3V
1
1
REF
V
–
to V
+
– 1.3V
V
+
= 2V to 11V
l
REF – 50mV
70
60
V
+
– 0.4V
GND + 0.4V
1.158
1.156
1.152
1.182
1.182
1.182
0.75
0.5
1.206
1.208
1.212
3.5
1.5
5
V
V
V
V
mV
mV
mV
Load Regulation
0 ≤ I
SOURCE
≤ 100µA
0 ≤ I
SINK
≤ 10µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
The
θ
JA
specified for the DD package is with minimal PCB heat
spreading metal. Using expanded metal area on all layers of a board
1. Introduction
Electronic scales are gradually replacing traditional measuring tools like springs and balances in everyday life, such as electronic price computing scales and electronic weigh...[详细]
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