OUT .................................................................. 50mA
OUT Short-Circuit Duration (V
+
≤ 5.5V) ........Continuous
Power Dissipation .............................................. 500mW
Operating Temperature Range
Commercial..............................................0°C to 70°C
Industrial ............................................ – 40°C to 85°C
Storage Temperature Range
PDIP, SO ............................................–65°C to 150°C
DFN....................................................–65°C to 150°C
Lead Temperature Range (Soldering, 10 sec)
PDIP, SO ...........................................................300°C
pin conFiguraTion
TOP VIEW
OUT B 1
OUT A 2
V
+
3
IN A
–
4
IN A
+
5
IN B
–
6
IN B
+
7
REF 8
N PACKAGE
16-LEAD PDIP
16 OUT C
15 OUT D
14 GND/HYST
†
13 IN D
+
12 IN D
–
11 IN C
+
10 IN C
–
9
V
–
TOP VIEW
OUT B
OUT A
V
+
IN A
–
IN A
+
IN B
–
IN B
+
REF
1
2
3
4
5
6
7
8
17
16 OUT C
15 OUT D
14 GND/HYST
†
13 IN D
+
12 IN D
–
11 IN C
+
10 IN C
–
9
V
–
S PACKAGE
16-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 90°C/ W (N)
T
JMAX
= 150°C,
θ
JA
= 150°C/ W (S)
†
PIN 14 IS GND FOR THE LTC1443
†
PIN 14 IS HYST FOR THE LTC1444 AND LTC1445
DHD16 PACKAGE
16-LEAD (5mm
×
4mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 41.7°C/ W
EXPOSED PAD (PIN 17) INTERNALLY CONNECTED TO V
–
†
PIN 14 IS GND FOR THE LTC1443
†
PIN 14 IS HYST FOR THE LTC1444 AND LTC1445
144345fe
2
LTC1443/LTC1444/LTC1445
orDer inForMaTion
LEAD FREE FINISH
LTC1443CN#PBF
LTC1443CS#PBF
LTC1443IN#PBF
LTC1443IS#PBF
LTC1444CN#PBF
LTC1444CS#PBF
LTC1444IN#PBF
LTC1444IS#PBF
LTC1445CN#PBF
LTC1445CS#PBF
LTC1445IN#PBF
LTC1445IS#PBF
LTC1443CDHD#PBF
LTC1443IDHD#PBF
LTC1444CDHD#PBF
LTC1444IDHD#PBF
LTC1445CDHD#PBF
LTC1445IDHD#PBF
TAPE AND REEL
LTC1443CN#TRPBF
LTC1443CS#TRPBF
LTC1443IN#TRPBF
LTC1443IS#TRPBF
LTC1444CN#TRPBF
LTC1444CS#TRPBF
LTC1444IN#TRPBF
LTC1444IS#TRPBF
LTC1445CN#TRPBF
LTC1445CS#TRPBF
LTC1445IN#TRPBF
LTC1445IS#TRPBF
LTC1443CDHD#TRPBF
LTC1443IDHD#TRPBF
LTC1444CDHD#TRPBF
LTC1444IDHD#TRPBF
LTC1445CDHD#TRPBF
LTC1445IDHD#TRPBF
PART MARKING*
LTC1443CN
LTC1443CS
LTC1443IN
LTC1443IS
LTC1444CN
LTC1444CS
LTC1444IN
LTC1444IS
LTC1445CN
LTC1445CS
LTC1445IN
LTC1445IS
1443
1443
1444
1444
1445
1445
PACKAGE DESCRIPTION
16-Lead PDIP
16-Lead Plastic SO
16-Lead PDIP
16-Lead Plastic SO
16-Lead PDIP
16-Lead Plastic SO
16-Lead PDIP
16-Lead Plastic SO
16-Lead PDIP
16-Lead Plastic SO
16-Lead PDIP
16-Lead Plastic SO
16-Lead (5mm × 4mm) Plastic DFN
16-Lead (5mm × 4mm) Plastic DFN
16-Lead (5mm × 4mm) Plastic DFN
16-Lead (5mm × 4mm) Plastic DFN
16-Lead (5mm × 4mm) Plastic DFN
16-Lead (5mm × 4mm) Plastic DFN
SPECIFIED
TEMPERATURE RANGE
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
0°C to 70°C
0°C to 70°C
–40°C to 85°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
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.
Consult LTC Marketing for information on nonstandard lead based finish parts.
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/
elecTrical characTerisTics
SYMBOL
Power Supply
V
+
I
CC
Comparator
V
OS
I
IN
V
CM
CMRR
PSRR
Noise
V
HYST
t
PD
PARAMETER
Supply Voltage Range
Supply Current
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.
CONDITIONS
l
MIN
2.0
TYP
MAX
11.0
8.5
UNITS
V
µA
HYST = REF (LTC1444/LTC1445)
V
CM
= 2.5V
V
IN+
= V
IN–
= 2.5V
LTC1444/LTC1445
V
–
to (V
+
– 1.3V)
V
+
= 2V to 11V
100Hz to 100kHz
LTC1444, LTC1445
Overdrive = 10mV, C
OUT
= 100pF
Overdrive = 100mV, C
OUT
= 100pF
l
l
l
l
IN
+
= IN
–
= 80mV
l
5.5
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
Voltage Noise
Hysteresis Input Voltage Range
Propagation Delay
±3.0
±0.01
±0.02
V
–
0.1
0.1
20
±10.0
±1.0
±1.0
V
+
– 1.3V
1.0
1.0
REF
l
REF – 50mV
12
4
mV
nA
nA
V
mV/V
mV/V
µV
RMS
V
µs
µs
144345fe
3
LTC1443/LTC1444/LTC1445
elecTrical characTerisTics
SYMBOL
V
OH
V
OL
Reference
V
REF
PARAMETER
Output High Voltage
Output Low Voltage
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.
CONDITIONS
I
O
= – 15mA; LTC1443/LTC1445
I
O
= 1.8mA; LTC1443
I
O
= 1.8mA; LTC1444/LTC1445
No Load, LTC1443
No Load, LTC1444/
LTC1445
C Temp Range
I Temp Range
C Temp Range
I Temp Range
MIN
l
l
l
TYP
V
+
– 0.4V
UNITS
V
GND + 0.4V
V
V
–
+ 0.4V
V
1.194
1.200
1.233
1.239
V
V
V
V
µA
µA
µA
µV
RMS
MAX
Reference Voltage
l
l
l
l
l
l
I
SOURCE
I
SINK
Noise
Reference Output Source Current
Reference Output Sink Current
Voltage Noise
∆V
REF
≤ 1mV
∆V
REF
≤ 2.5mV
∆V
REF
≤ 5mV
100Hz to 100kHz
1.170
1.164
1.209
1.203
100
10
10
1.182
1.221
200
15
15
100
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
Power Supply
V
+
I
CC
Comparator
V
OS
I
IN
V
CM
CMRR
PSRR
Noise
V
HYST
t
PD
V
OH
V
OL
Reference
V
REF
PARAMETER
Supply Voltage Range
Supply Current
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
Voltage Noise
Hysteresis Input Voltage Range
Propagation Delay
Output High Voltage
Output Low Voltage
CONDITIONS
l
MIN
2.0
TYP
MAX
11.0
8
±10.0
±1.0
±1.0
+
– 1.3V
V
1.0
1.0
UNITS
V
µA
IN
+
= IN
–
= 80mV, HYST = REF
V
CM
= 1.5V
V
IN+
= V
IN–
= 1.5V
LTC1444/LTC1445
V
–
to (V
+
– 1.3V)
V
+
= 2V to 11V
100Hz to 100kHz
LTC1444, LTC1445
Overdrive = 10mV, C
OUT
= 100pF
Overdrive = 100mV, C
OUT
= 100pF
I
O
= – 10mA; LTC1443/LTC1445
I
O
= 0.8mA; LTC1443
I
O
= 0.8mA; LTC1444/LTC1445
No Load, LTC1443
No Load, LTC1444/
LTC1445
C Temp Range
I Temp Range
C Temp Range
I Temp Range
l
5
±3.0
±0.01
±0.02
l
l
l
l
l
l
l
l
mV
nA
nA
–
V
V
0.1
mV/V
0.1
mV/V
100
µV
RMS
REF – 50mV
REF
V
14
µs
5
µs
V
+
– 0.4V
V
GND + 0.4V
V
–
+ 0.4V
V
V
1.170
1.164
1.209
1.203
60
10
10
1.182
1.221
120
15
15
100
1.194
1.200
1.233
1.239
V
V
V
V
µA
µA
µA
µV
RMS
Reference Voltage
l
l
l
l
l
l
I
SOURCE
I
SINK
Noise
Reference Output Source Current
Reference Output Sink Current
Noise Voltage
∆V
REF
≤ 1mV
∆V
REF
≤ 2.5mV
∆V
REF
≤ 5mV
100Hz to 100kHz
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
便携式医疗设备的特殊性决定了它们应该是对用户友好的、必须工作在无菌环境下，并且空间占用小、耗能低。 同时，便携式医疗设备还需要足够的计算能力以便处理医疗数据，能够连接到无线或有线接口以便记录和发送数据。从设计人员的角度考虑，上述需求需要低功耗的单片机（MCU）和数字信号控制器（Digital Signal Controller，DSC）。 正是有了嵌入式处理器，设计人员才有可能设...[详细]
目前医疗监护中无法动态掌握患者信息，一旦患者病情恶化，无法在第一时间实施抢救，对数据信息维护效率低。 文中首先阐述了蓝牙技术及其在医疗监护中应用的可行性，然后设计了系统框架，给出了具体功能，BlueTooth Wireless Communication Technology Application in Medical Monitoring包括数据采集和语音报警，最后对蓝牙信号在传输...[详细]
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