(Note 2)..................................................–40°C to 125°C
Storage Temperature Range
(Note 3).................................................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
T
JMAX
= 150°C,
θ
JA
= 230°C/W
*DNC: DO NOT CONNECT
ORDER INFORMATION
LEAD FREE FINISH
LT1790ACS6-1.25#PBF
LT1790AIS6-1.25#PBF
LT1790BCS6-1.25#PBF
LT1790BIS6-1.25#PBF
LT1790ACS6-2.048#PBF
LT1790AIS6-2.048#PBF
LT1790BCS6-2.048#PBF
LT1790BIS6-2.048#PBF
LT1790ACS6-2.5#PBF
LT1790AIS6-2.5#PBF
LT1790BCS6-2.5#PBF
LT1790BIS6-2.5#PBF
LT1790ACS6-3#PBF
LT1790AIS6-3#PBF
LT1790BCS6-3#PBF
LT1790BIS6-3#PBF
LT1790ACS6-3.3#PBF
LT1790AIS6-3.3#PBF
LT1790BCS6-3.3#PBF
LT1790BIS6-3.3#PBF
LT1790ACS6-4.096#PBF
LT1790AIS6-4.096#PBF
LT1790BCS6-4.096#PBF
LT1790BIS6-4.096#PBF
LT1790ACS6-5#PBF
LT1790AIS6-5#PBF
LT1790BCS6-5#PBF
LT1790BIS6-5#PBF
TAPE AND REEL
LT1790ACS6-1.25#TRPBF
LT1790AIS6-1.25#TRPBF
LT1790BCS6-1.25#TRPBF
LT1790BIS6-1.25#TRPBF
LT1790ACS6-2.048#TRPBF
LT1790AIS6-2.048#TRPBF
LT1790BCS6-2.048#TRPBF
LT1790BIS6-2.048#TRPBF
LT1790ACS6-2.5#TRPBF
LT1790AIS6-2.5#TRPBF
LT1790BCS6-2.5#TRPBF
LT1790BIS6-2.5#TRPBF
LT1790ACS6-3#TRPBF
LT1790AIS6-3#TRPBF
LT1790BCS6-3#TRPBF
LT1790BIS6-3#TRPBF
LT1790ACS6-3.3#TRPBF
LT1790AIS6-3.3#TRPBF
LT1790BCS6-3.3#TRPBF
LT1790BIS6-3.3#TRPBF
LT1790ACS6-4.096#TRPBF
LT1790AIS6-4.096#TRPBF
LT1790BCS6-4.096#TRPBF
LT1790BIS6-4.096#TRPBF
LT1790ACS6-5#TRPBF
LT1790AIS6-5#TRPBF
LT1790BCS6-5#TRPBF
LT1790BIS6-5#TRPBF
PART MARKING*
LTXT
LTXT
LTXT
LTXT
LTXU
LTXU
LTXU
LTXU
LTPZ
LTPZ
LTPZ
LTPZ
LTQA
LTQA
LTQA
LTQA
LTXW
LTXW
LTXW
LTXW
LTQB
LTQB
LTQB
LTQB
LTQC
LTQC
LTQC
LTQC
PACKAGE DESCRIPTION
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
SPECIFIED 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
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
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
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
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
1790fb
2
LT1790
ORDER INFORMATION
LEAD BASED FINISH
LT1790ACS6-1.25
LT1790AIS6-1.25
LT1790BCS6-1.25
LT1790BIS6-1.25
LT1790ACS6-2.048
LT1790AIS6-2.048
LT1790BCS6-2.048
LT1790BIS6-2.048
LT1790ACS6-2.5
LT1790AIS6-2.5
LT1790BCS6-2.5
LT1790BIS6-2.5
LT1790ACS6-3
LT1790AIS6-3
LT1790BCS6-3
LT1790BIS6-3
LT1790ACS6-3.3
LT1790AIS6-3.3
LT1790BCS6-3.3
LT1790BIS6-3.3
LT1790ACS6-4.096
LT1790AIS6-4.096
LT1790BCS6-4.096
LT1790BIS6-4.096
LT1790ACS6-5
LT1790AIS6-5
LT1790BCS6-5
LT1790BIS6-5
TAPE AND REEL
LT1790ACS6-1.25#TR
LT1790AIS6-1.25#TR
LT1790BCS6-1.25#TR
LT1790BIS6-1.25#TR
LT1790ACS6-2.048#TR
LT1790AIS6-2.048#TR
LT1790BCS6-2.048#TR
LT1790BIS6-2.048#TR
LT1790ACS6-2.5#TR
LT1790AIS6-2.5#TR
LT1790BCS6-2.5#TR
LT1790BIS6-2.5#TR
LT1790ACS6-3#TR
LT1790AIS6-3#TR
LT1790BCS6-3#TR
LT1790BIS6-3#TR
LT1790ACS6-3.3#TR
LT1790AIS6-3.3#TR
LT1790BCS6-3.3#TR
LT1790BIS6-3.3#TR
LT1790ACS6-4.096#TR
LT1790AIS6-4.096#TR
LT1790BCS6-4.096#TR
LT1790BIS6-4.096#TR
LT1790ACS6-5#TR
LT1790AIS6-5#TR
LT1790BCS6-5#TR
LT1790BIS6-5#TR
PART MARKING*
LTXT
LTXT
LTXT
LTXT
LTXU
LTXU
LTXU
LTXU
LTPZ
LTPZ
LTPZ
LTPZ
LTQA
LTQA
LTQA
LTQA
LTXW
LTXW
LTXW
LTXW
LTQB
LTQB
LTQB
LTQB
LTQC
LTQC
LTQC
LTQC
PACKAGE DESCRIPTION
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
SPECIFIED 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
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
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
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
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/
1790fb
3
LT1790
AVAILABLE OPTIONS
TEMPERATURE RANGE
OUTPUT
VOLTAGE
1.250V
2.048V
2.500V
3.000V
3.300V
4.096V
5.000V
INITIAL
ACCURACY
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
TEMPERATURE
COEFFICIENT
10ppm/°C
25ppm/°C
10ppm/°C
25ppm/°C
10ppm/°C
25ppm/°C
10ppm/°C
25ppm/°C
10ppm/°C
25ppm/°C
10ppm/°C
25ppm/°C
10ppm/°C
25ppm/°C
0°C TO 70°C
ORDER PART NUMBER
LT1790ACS6-1.25
LT1790BCS6-1.25
LT1790ACS6-2.048
LT1790BCS6-2.048
LT1790ACS6-2.5
LT1790BCS6-2.5
LT1790ACS6-3
LT1790BCS6-3
LT1790ACS6-3.3
LT1790BCS6-3.3
LT1790ACS6-4.096
LT1790BCS6-4.096
LT1790ACS6-5
LT1790BCS6-5
–40°C TO 85°C
ORDER PART NUMBER
LT1790AIS6-1.25
LT1790BIS6-1.25
LT1790AIS6-2.048
LT1790BIS6-2.048
LT1790AIS6-2.5
LT1790BIS6-2.5
LT1790AIS6-3
LT1790BIS6-3
LT1790AIS6-3.3
LT1790BIS6-3.3
LT1790AIS6-4.096
LT1790BIS6-4.096
LT1790AIS6-5
LT1790BIS6-5
1.25V ELECTRICAL CHARACTERISTICS
PARAMETER
Output Voltage (Notes 3, 4)
CONDITIONS
LT1790A
LT1790B
LT1790AC
LT1790AI
LT1790BC
LT1790BI
Output Voltage Temperature Coefficient (Note 5)
T
MIN
≤ T
A
≤ T
MAX
LT1790A
LT1790B
2.6V ≤ V
IN
≤ 18V
The
l
denotes the specifications which apply over the specified
temperature range, otherwise specifications are at T
A
= 25°C. C
L
= 1μF and V
IN
= 2.6V, unless otherwise noted.
MIN
1.24937
–0.05
1.24875
–0.1
l
l
l
l
l
l
l
l
l
l
l
l
l
TYP
1.25
1.25
1.25
1.25
1.25
1.25
MAX
1.25062
0.05
1.25125
0.1
1.2515
0.12
1.25219
0.175
1.25344
0.275
1.25516
0.4125
10
25
170
220
160
250
180
250
2.15
2.50
2.90
2.95
UNITS
V
%
V
%
V
%
V
%
V
%
V
%
ppm/°C
ppm/°C
ppm/V
ppm/V
ppm/mA
ppm/mA
ppm/mA
ppm/mA
V
V
V
V
1.24850
–0.12
1.24781
–0.175
1.24656
–0.275
1.24484
–0.4125
5
12
50
100
120
Line Regulation
Load Regulation (Note 6)
I
OUT
Source = 5mA, V
IN
= 2.8V
I
OUT
Sink = 1mA, V
IN
= 3.2V
Minimum Operating Voltage (Note 7)
V
IN
, ΔV
OUT
= 0.1%
I
OUT
= 0mA
I
OUT
Source = 5mA
I
OUT
Sink = 1mA
1.95
l
l
l
1790fb
4
LT1790
1.25V ELECTRICAL CHARACTERISTICS
PARAMETER
Supply Current
Minimum Operating Current—
Negative Output (See Figure 7)
Turn-On Time
Output Noise (Note 8)
Long-Term Drift of Output Voltage (Note 9)
Hysteresis (Note 10)
ΔT = 0°C to 70°C
ΔT = –40°C to 85°C
l
l
The
l
denotes the specifications which apply over the specified
temperature range, otherwise specifications are at T
A
= 25°C. C
L
= 1μF and V
IN
= 2.6V, unless otherwise noted.
CONDITIONS
No Load
V
OUT
= – 1.25V, ±0.1%
C
LOAD
= 1μF
0.1Hz ≤ f ≤ 10Hz
10Hz ≤ f ≤ 1kHz
l
MIN
TYP
35
100
250
10
14
50
25
40
MAX
60
75
125
UNITS
μA
μA
μA
μs
μV
P-P
μV
RMS
ppm/√kHr
ppm
ppm
The
l
denotes the specifications which apply over the
specified temperature range, otherwise specifications are at T
我最近在《华尔街日报》看到一篇题为“我们需要能维修自己的电子小玩意儿的权利(We need the right to repair our gadgets)”的文章(参考原文：)，作者对于众多电子产品看来是“有计画的废弃(planned obsolescence)”之现象非常愤怒，认为大众应该要求电子产品可以被维修。 但实际的情况是，举例来说，家家都有的电视机如果故障了，修理费用可能...[详细]
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