LT1490AC/LT1491AC ...........................–40°C to 85°C
LT1490AI/LT1491AI .............................–40°C to 85°C
LT1490AH/LT1491AH......................... –40°C to 125°C
Specified Temperature Range (Note 4)
LT1490AC/LT1490AI ............................–40°C to 85°C
LT1491AC/LT1491AI.............................–40°C to 85°C
LT1490AH/LT1491AH......................... –40°C to 125°C
Junction Temperature .......................................... 150°C
Junction Temperature (DD/DHC Package) ........... 125°C
Storage Temperature Range ................. –65°C to 150°C
Storage Temperature Range
DD/DHC Package .............................. –65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PIN CONFIGURATION
LT1490A
LT1490A
TOP VIEW
TOP VIEW
OUT A
–IN A
+IN A
V
–
1
2
3
4
8 V
+
A
B
LT1490A
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V
–
4
A
B
8
7
6
5
V
+
OUT B
–IN B
+IN B
OUT A
7 OUT B
6 –IN B
5 +IN B
–IN A
+IN A
V
–
1
2
A
3
B
4
8
7
6
5
V
+
OUT B
–IN B
+IN B
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 250°C/W
N8 PACKAGE
S8 PACKAGE
8-LEAD PDIP
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 130°C/W (N8)
T
JMAX
= 150°C,
θ
JA
= 190°C/W (S8)
LT1491A
DD PACKAGE
8-LEAD (3mm 3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 160°C/W (NOTE 2)
UNDERSIDE METAL CONNECTED TO V
–
TOP VIEW
LT1491A
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V
+
4
+IN B 5
–IN B 6
OUT B 7
B
C
A
D
14 OUT D
13 –IN D
12 +IN D
11 V
–
10 +IN C
9
8
–IN C
OUT C
OUT A
–IN A
+IN A
V+
+IN B
–IN B
OUT B
NC
1
2
3
4
5
6
7
8
B
C
A
D
16 OUT D
15 –IN D
14 +IN D
13 V–
12 +IN C
11 –IN C
10 OUT C
9
NC
N PACKAGE
S PACKAGE
14-LEAD PDIP
14-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 110°C/W (N)
T
JMAX
= 150°C,
θ
JA
= 150°C/W (S)
DHC16 PACKAGE
16-LEAD (5mm 3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 160°C/W (NOTE 2)
UNDERSIDE METAL CONNECTED TO V
–
14901afd
2
LT1490A/LT1491A
ORDER INFORMATION
LEAD FREE FINISH
LT1490ACMS8#PBF
LT1490AIMS8#PBF
LT1490AHMS8#PBF
LT1490ACS8#PBF
LT1490AIS8#PBF
LT1490AHS8#PBF
LT1490ACN8#PBF
LT1490AIN8#PBF
LT1490ACDD#PBF
LT1490AIDD#PBF
LT1491ACS#PBF
LT1491AIS#PBF
LT1491AHS#PBF
LT1491ACN#PBF
LT1491AIN#PBF
LT1491ACDHC#PBF
LT1491AIDHC#PBF
TAPE AND REEL
LT1490ACMS8#TRPBF
LT1490AIMS8#TRPBF
LT1490AHMS8#TRPBF
LT1490ACS8#TRPBF
LT1490AIS8#TRPBF
LT1490AHS8#TRPBF
LT1490ACN8#TRPBF
LT1490AIN8#TRPBF
LT1490ACDD#TRPBF
LT1490AIDD#TRPBF
LT1491ACS#TRPBF
LT1491AIS#TRPBF
LT1491AHS#TRPBF
LT1491ACN#TRPBF
LT1491AIN#TRPBF
LT1491ACDHC#TRPBF
LT1491AIDHC#TRPBF
PART MARKING*
LTNG
LTPU
LTRK
1490A
1490AI
1490AH
LT1490ACN8
LT1490AIN8
LAAH
LAAH
LT1491ACS
LT1491AIS
LT1491AHS
LT1491ACN
LT1491AIN
1491A
1491A
PACKAGE DESCRIPTION
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead PDIP
8-Lead PDIP
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
14-Lead Plastic SO
14-Lead Plastic SO
14-Lead Plastic SO
14-Lead PDIP
14-Lead PDIP
16-Lead (5mm
×
3mm) Plastic DFN
16-Lead (5mm
×
3mm) Plastic DFN
SPECIFIED TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°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
–40°C to 125°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 non-standard 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/
14901afd
3
LT1490A/LT1491A
ELECTRICAL CHARACTERISTICS
The
●
denotes specifications which apply over the full operating
temperature range of – 40°C ≤ T
A
≤ 85°C, otherwise specifications are at T
A
= 25°C. V
S
= 3V, 0V; V
S
= 5V, 0V; V
CM
= V
OUT
= half supply
unless otherwise noted. (Note 4)
LT1490AC/LT1491AC
LT1490AI/LT1491AI
MIN
TYP
MAX
l
l
l
l
l
l
l
l
l
l
l
l
l
SYMBOL
V
OS
PARAMETER
Input Offset Voltage (Note 5)
CONDITIONS
LT1490A N, S Packages
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
LT1490A MS8 Package, LT1491A N, S Packages
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
LT1490A DD, LT1491A DHC
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
UNITS
μV
μV
μV
μV
μV
μV
μV
μV
μV
μV/°C
μV/°C
nA
μA
nA
μA
nA
pA/°C
μV
P-P
nV/√Hz
pA/√Hz
MΩ
MΩ
pF
110
500
700
800
1000
1200
1400
1200
1400
1600
4
6
0.8
0.8
8
10
220
250
Input Offset Voltage Drift (Note 9)
I
OS
I
B
Input Offset Current
–40°C ≤ T
A
≤ 85°C
LT1490A DD, LT1491A DHC, –40°C ≤ T
A
≤ 85°C
V
CM
= 44V (Note 6)
2
2
0.2
1
3
0.3
2
1
50
0.015
6
4
17
11
4.6
Input Bias Current
V
CM
= 44V (Note 6)
V
S
= 0V
Input Bias Current Drift
Input Noise Voltage
–40°C ≤ T
A
≤ 85°C
0.1Hz to 10Hz
f = 1kHz
f = 1kHz
Differential
Common Mode, V
CM
= 0V to 44V
e
n
i
n
R
IN
C
IN
CMRR
A
VOL
Input Noise Voltage Density
Input Noise Current Density
Input Resistance
Input Capacitance
Input Voltage Range
Common Mode Rejection Ratio
(Note 6)
Large-Signal Voltage Gain
l
0
84
80
200
133
100
400
250
200
98
98
1500
44
V
dB
dB
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
V
CM
= 0V to V
CC
– 1V
V
CM
= 0V to 44V
V
S
= 3V, V
O
= 500mV to 2.5V, R
L
= 10k
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
V
S
= 5V, V
O
= 500mV to 4.5V, R
L
= 10k
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
l
l
l
l
l
l
l
l
l
l
l
l
l
l
1500
V
OL
Output Voltage Swing Low
V
S
= 3V, No Load
V
S
= 3V, I
SINK
= 5mA
V
S
= 5V, No Load
V
S
= 5V, I
SINK
= 5mA
V
S
= 5V, I
SINK
= 10mA
3
250
3
250
330
2.95
2.55
4.95
4.30
10
10
15
15
2.978
2.6
4.978
4.6
15
30
25
30
10
450
10
500
500
mV
mV
mV
mV
mV
V
V
V
V
mA
mA
mA
mA
V
OH
Output Voltage Swing High
V
S
= 3V, No Load
V
S
= 3V, I
SOURCE
= 5mA
V
S
= 5V, No Load
V
S
= 5V, I
SOURCE
= 10mA
I
SC
Short-Circuit Current (Note 2)
V
S
= 3V, Short to GND
V
S
= 3V, Short to V
CC
V
S
= 5V, Short to GND
V
S
= 5V, Short to V
CC
14901afd
4
LT1490A/LT1491A
ELECTRICAL CHARACTERISTICS
The
●
denotes specifications which apply over the full operating
temperature range of – 40°C ≤ T
A
≤ 85°C, otherwise specifications are at T
A
= 25°C. V
S
= 3V, 0V; V
S
= 5V, 0V; V
CM
= V
OUT
= half supply
unless otherwise noted. (Note 4)
LT1490AC/LT1491AC
LT1490AI/LT1491AI
MIN
TYP
MAX
l
l
l
l
SYMBOL
PSRR
PARAMETER
Power Supply Rejection Ratio
Minimum Operating Supply Voltage
Reverse Supply Voltage
CONDITIONS
V
S
= 2.5V to 12.5V, V
CM
= V
O
= 1V
I
S
= –100μA per Amplifier
UNITS
dB
V
V
μA
μA
kHz
kHz
kHz
V/μs
V/μs
V/μs
84
18
98
2
27
40
50
55
2.5
I
S
GBW
Supply Current per Amplifier
(Note 7)
Gain Bandwidth Product
(Note 6)
Slew Rate
(Note 8)
f = 1kHz
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
A
V
= –1, R
L
= ∞
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
l
l
l
l
110
100
90
0.035
0.031
0.030
180
SR
0.06
The
●
denotes specifications which apply over the full operating temperature range of – 40°C ≤ T
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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