LT1490AC/LT1491AC ......................... – 40°C to 85°C
LT1490AI/LT1491AI ........................... – 40°C to 85°C
LT1490AH/LT1491AH ...................... – 40°C to 125°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
OUT A
–IN A
+IN A
V
–
1
2
3
4
8 V
+
A
B
OUT A
–IN A
+IN A
V
–
1
2
A
3
B
4
7 OUT B
6 –IN B
5 +IN B
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 250°C/ W
N8 PACKAGE
8-LEAD PDIP
T
JMAX
= 150°C,
θ
JA
= 130°C/ W (N8)
T
JMAX
= 150°C,
θ
JA
= 190°C/ W (S8)
ORDER PART
NUMBER
LT1490ACMS8
LT1490AIMS8
LT1490AHMS8
MS8
PART MARKING
LTNG
LTPU
LTRK
ORDER PART
NUMBER
LT1490ACS8
LT1490AIS8
LT1490AHS8
LT1490ACN8
LT1490AIN8
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V
+
4
B
C
A
D
14 OUT D
13 –IN D
12 +IN D
11 V
–
10 +IN C
9
8
–IN C
OUT C
ORDER PART
NUMBER
LT1491ACS
LT1491AIS
LT1491AHS
LT1491ACN
LT1491AIN
+IN B 5
–IN B 6
OUT B 7
N PACKAGE
14-LEAD PDIP
S PACKAGE
14-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 110°C/ W (N)
T
JMAX
= 150°C,
θ
JA
= 150°C/ W (S)
*Temperature grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges.
sn1490, 14901afbs
2
U
U
W
W W
U
W
(Note 1)
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
TOP VIEW
8
7
6
5
V
+
OUT B
–IN B
+IN B
OUT A 1
–IN A 2
+IN A 3
V
–
4
A
TOP VIEW
8
7
B
6
5
V
+
OUT B
–IN B
+IN B
S8 PACKAGE
8-LEAD PLASTIC SO
DD PACKAGE
8-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 160°C/ W (NOTE 2)
UNDERSIDE METAL CONNECTED TO V
–
S8/N8
PART MARKING
1490A
1490AI
1490AH
ORDER PART
NUMBER
LT1490ACDD
LT1490AIDD
DD
PART MARKING*
LAAH
TOP VIEW
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
ORDER PART
NUMBER
LT1491ACDHC
LT1491AIDHC
DHC
PART MARKING*
1491A
DHC16 PACKAGE
16-LEAD (5mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 160°C/ W (NOTE 2)
UNDERSIDE METAL CONNECTED TO V
–
LT1490A/LT1491A
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
110
●
●
ELECTRICAL CHARACTERISTICS
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
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
500
700
800
1000
1200
1400
1200
1400
1600
4
6
0.8
0.8
8
10
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
Input Offset Voltage Drift (Note 9)
I
OS
I
B
Input Offset Current
V
CM
= 44V (Note 6)
Input Bias Current
V
CM
= 44V (Note 6)
V
S
= 0V
Input Bias Current Drift
Input Noise Voltage
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
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
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
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
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
220
250
– 40°C
≤
T
A
≤
85°C
●
LT1490A DD, LT1491A DHC, – 40°C
≤
T
A
≤
85°C
●
●
●
●
●
●
2
2
0.2
1
3
0.3
2
1
50
0.015
6
4
0
84
80
200
133
100
400
250
200
98
98
1500
17
11
4.6
– 40°C
≤
T
A
≤
85°C
0.1Hz to 10Hz
f = 1kHz
f = 1kHz
Differential
Common Mode, V
CM
= 0V to 44V
44
V
dB
dB
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
1500
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
sn1490, 14901afbs
3
LT1490A/LT1491A
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
●
●
●
●
ELECTRICAL CHARACTERISTICS
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
●
●
●
●
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
A
≤
85°C, otherwise specifications are
at T
A
= 25°C. V
S
=
±15V;
V
CM
= 0V, V
OUT
= 0V unless otherwise noted. (Note 4)
LT1490AC/LT1491AC
LT1490AI/LT1491AI
MIN
TYP
MAX
150
●
●
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
UNITS
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV/°C
µV/°C
nA
nA
pA/°C
µV
P-P
nV/√Hz
pA/√Hz
MΩ
MΩ
pF
700
950
1100
1200
1350
1500
1400
1550
1700
6
7
0.8
8
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
Input Offset Voltage Drift (Note 9)
I
OS
I
B
Input Offset Current
Input Bias Current
Input Bias Current Drift
Input Noise Voltage
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
Large-Signal Voltage Gain
V
CM
= – 15V to 29V
V
O
=
±14V,
R
L
= 10k
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
No Load
I
OUT
=
±5mA
I
OUT
=
±10mA
●
●
●
●
●
●
●
●
250
285
– 40°C
≤
T
A
≤
85°C
●
LT1490A DD, LT1491A DHC, – 40°C
≤
T
A
≤
85°C
●
●
●
2
2
0.2
1
5
1
50
0.015
6
17
15000
4.6
– 15
80
100
75
50
±14.9
±14.5
±14.5
98
250
– 40°C
≤
T
A
≤
85°C
0.1Hz to 10Hz
f = 1kHz
f = 1kHz
Differential
Common Mode, V
CM
= – 15V to 14V
●
29
V
dB
V/mV
V/mV
V/mV
V
V
V
sn1490, 14901afbs
V
O
Output Voltage Swing
±14.978
±14.750
±14.670
4
LT1490A/LT1491A
ELECTRICAL CHARACTERISTICS
SYMBOL
I
SC
PARAMETER
Short-Circuit Current (Note 2)
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
=
±15V;
V
CM
= 0V, V
OUT
= 0V unless otherwise noted. (Note 4)
LT1490AC/LT1491AC
LT1490AI/LT1491AI
MIN
TYP
MAX
●
●
●
●
CONDITIONS
Short to GND
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
V
S
=
±1.25V
to
±22V
UNITS
mA
mA
mA
dB
±20
±15
±10
88
±25
PSRR
I
S
GBW
Power Supply Rejection Ratio
Supply Current per Amplifier
Gain Bandwidth Product
98
50
70
85
µA
µA
kHz
kHz
kHz
V/µs
V/µs
V/µs
f = 1kHz
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
A
V
= – 1, R
L
=
∞,
V
O
=
±10V,
Measure at V
O
=
±5V
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
●
●
125
110
100
0.0375
200
SR
Slew Rate
0.07
●
●
0.0330
0.0300
The
●
denotes specifications which apply over the full operating temperature range of – 40°C
白光LED光衰原因之荧光粉性能的衰退 到目前，白光 LED、尤其是小功率白光 LED 的发光性能快速衰退已越来越为人们所认识。其实，盲目地夸大宣传，只能将 LED 行业引向歧途，不正视白光 LED 存在的问题，只能延缓白光 LED 应用的发展。只有正视问题、研究问题、尽早解决问题，白光 LED 才能健康、快速发展。 白光 LED 当前面临的一个主要问题就寿命问题。由于白光 LED 的价格尚很...[详细]
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