Ambient Temperature............................. -40NC to +125NC
Junction Temperature ............................ -40NC to +150NC
Storage Temperature Range...................... -55NC to +125NC
Lead Temperature (soldering, 10s) .........................+300NC
Soldering Temperature (reflow) ...............................+260NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
TSSOP
Junction-to-Ambient Thermal Resistance (q
JA
) ..........37°C/W
Junction-to-Case Thermal Resistance (q
JC
)..................2°C/W
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
RECOMMENDED OPERATING CONDITIONS (Note 2)
PARAMETER
Field Supply Voltage
Field Inputs Voltage
Logic Inputs Voltage
Current-Limit Setting Resistor
Field Input Data Rate
SYMBOL
V
CC24V
V
INn
V
LOGIC
R
REF
f
IN
(Note 4)
(Note 3)
CONDITIONS
MIN
7
-0.3
0
15
200
TYP
MAX
36
36
5.5
UNITS
V
V
V
kI
kHz
Maxim Integrated
2
MAX31910
Industrial, Octal, Digital Input
Translator/Serializer
DC ELECTRICAL CHARACTERISTICS
(V
CC24V
= 7V to 36V, T
J
= -40NC to +150NC, unless otherwise noted.) (Note 2)
PARAMETER
Field-Supply Current
Field-Supply UVLO Off/On
Field-Supply UVLO On/Off
Field Input Threshold High-
to-Low
Field Input Threshold Low-to-
High
Field Input Hysteresis
Input Threshold High-to-Low
(at IC pin)
Input Threshold Low-to-High
(at IC pin)
Input Threshold Hysteresis
(at IC pin)
Field Input Pin Resistance
Field Input Current Limit
SYMBOL
I
CC24V
V
ONUVLO
V
OFFUVLO
V
IN-(INF)
V
IN+(INF)
V
HYS(INF)
V
TH-(INP)
V
TH+(INP)
V
HYS(INP)
R
INP
I
INLIM
R
REF
= 15kI, V
CC24V
= 18V to 30V
(Note 5)
DB1/DB0 = 0/0: no filtering
DB1/DB0 = 0/1
DB1/DB0 = 1/0
DB1/DB0 = 1/1
Max I
LOAD
= 50mA
I
LOAD
= 50mA
I
LOAD
= 1mA to 50mA
I
OL
= 4mA
I
OH
= -4mA
4.0
0.3 x
V
5VOUT
-50
0.5 x
V
5VOUT
-30
135
0.7 x
V
5VOUT
-15
2.2
0.008
0.25
1.0
4.75
(Note 11)
(Note 11)
2.2kI external series resistor
2.2kI external series resistor (Note
11)
2.2kI external series resistor (Note
11)
2
7
6
CONDITIONS
IN1–IN8 = 24V, 5VOUT = open,
RT1–RT8 = GND, all logic inputs open
MIN
TYP
1.4
9
8
7.5
8.5
1
2.5
3.5
1
0.8
2.4
0
0.025
0.75
3
5.0
10
20
0.4
2.6
0.038
1.1
4.5
5.25
20
50
1.0
4
10
MAX
2.2
10
UNITS
mA
V
V
V
V
V
V
V
V
kI
mA
Filter Time Constant
t
FILTER
V
5VOUT
dVREG
LINE
dVREG
LOAD
V
OL
V
OH
V
IH-IL
I
IL
T
ALRM
ms
Linear Regulator Output
Regulator Line Regulation
Regulator Load Regulation
Logic-Low Output Voltage
Logic-High Output Voltage
Logic-Input Trip Point
Logic-Input Leakage Current
Overtemperature Alarm
V
mV
mV
V
V
V
FA
NC
Maxim Integrated
3
MAX31910
Industrial, Octal, Digital Input
Translator/Serializer
AC ELECTRICAL CHARACTERISTICS
(V
CC24V
= 7V to 36V, T
J
= -40NC to +150NC, unless otherwise noted.) (Note 2)
PARAMETER
Field Input Pulse Width
ESD
SYMBOL
t
PW
CONDITIONS
No external capacitors on pins IN1-
IN8
HBM, all pins
HBM, IN1-IN8 with respect to GND
MIN
1
±2
±15
TYP
MAX
UNITS
µs
kV
AC ELECTRICAL CHARACTERISTICS: SPI INTERFACE
(V
CC24V
= 7V to 36V, T
J
= -40NC to +150NC, unless otherwise noted.) (Note 2)
PARAMETER
CLK Pulse Duration
CS
Pulse Duration
SIN to CLK Setup Time
SIN to CLK Hold Time
CS
to CLK Setup Time
CS
to CLK Recovery Time
Clock Pulse Frequency
Propagation Delay, CLK to SOUT
Propagation Delay,
CS
to SOUT
Rise/Fall Time SOUT/FAULT
SYMBOL
t
CLKPW
t
CSPW
t
SU1
t
H1
t
SU2
t
REC
f
CLK
t
P1
t
P2
t
R/F
(Note 6)
(Note 7)
(Note 8)
(Note 8)
(Note 9)
(Note 9)
(Notes 6, 10)
(Note 6)
(Note 7)
(Note 6)
CONDITIONS
MIN
20
20
5
8
8
12
DC
25
20
20
40
TYP
MAX
UNITS
ns
ns
ns
ns
ns
ns
MHz
ns
ns
ns
Note 2:
Limits are 100% production tested at T
A
= +25°C and/or T
A
= +125°C. Limits over the operating temperature range and
relevant supply voltage range are guaranteed by design and characterization. Typical values are not guaranteed.
Note 3:
When using suggested external 2.2kω series resistors, limits of -3V to +36V apply.
Note 4:
f
IN
refers to the maximum pulse frequency (1/f
IN
= shortest pulse width) that can be detected from the field sensors and
switches.
Note 5:
External resistor R
REF
can be adjusted to set any desired current limit between 0.5mA and 6mA.
Note 6:
See
Figure 9.
Note 7:
See
Figure 6.
Note 8:
See
Figure 8.
Note 9:
See
Figure 7.
Note 10:
This is the maximum bit transfer rate through the serializer interface.
Note 11:
When input current switching is enabled (DB0/DB1 = 0), there is no input threshold hysteresis. In this case, the input
threshold for both falling and rising signals is the high-to-low threshold.
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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