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Электронный компонент: LT1790AIS6-5

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1
LT1790
1790fa
Micropower SOT-23
Low Dropout Reference Family
The LT
1790 is a family of SOT-23 micropower low
dropout series references that combine high accuracy and
low drift with low power dissipation and small package
size. These micropower references use curvature com-
pensation to obtain a low temperature coefficient and
trimmed precision thin-film resistors to achieve high
output accuracy. In addition, each LT1790 is post-pack-
age trimmed to greatly reduce the temperature coefficient
and increase the output accuracy. Output accuracy is
further assured by excellent line and load regulation.
Special care has been taken to minimize thermally induced
hysteresis.
The LT1790s are ideally suited for battery-operated sys-
tems because of their small size, low supply current and
reduced dropout voltage. These references provide supply
current and power dissipation advantages over shunt
references that must idle the entire load current to operate.
Since the LT1790 can also sink current, it can operate as
a micropower negative voltage reference with the same
performance as a positive reference.
s
Handheld Instruments
s
Negative Voltage References
s
Industrial Control Systems
s
Data Acquisition Systems
s
Battery-Operated Equipment
s
High Accuracy:
A Grade--0.05% Max
B Grade--0.1% Max
s
Low Drift:
A Grade--10ppm/
C Max
B Grade--25ppm/
C Max
s
Low Profile (1mm) ThinSOT
TM
Package
s
Low Supply Current: 60
A Max
s
Sinks and Sources Current
s
Low Dropout Voltage
s
Guaranteed Operational 40
C to 125
C
s
Wide Supply Range to 18V
s
Available Output Voltage Options: 1.25V, 2.048V,
2.5V, 3V, 3.3V, 4.096V and 5V
, LTC and LT are registered trademarks of Linear Technology Corporation.
Typical V
OUT
Distribution for LT1790-2.5
Positive Connection for LT1790-2.5
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
0.1
F
2.6V
V
IN
18V
1
F
1, 2
6
V
OUT
= 2.5V
4
LT1790-2.5
1790 TA01
OUTPUT VOLTAGE (V)
2.498
2.499
2.500
2.501
2.502
NUMBER OF UNITS
30
40
50
1790 TA02
20
10
25
35
45
15
5
0
LT1790B LIMITS
LT1790A LIMITS
167 UNITS
ThinSOT is a trademark of Linear Technology Corporation.
2
LT1790
1790fa
Input Voltage .......................................................... 20V
Specified Temperature Range
Commercial ............................................ 0
C to 70
C
Industrial ............................................ 40
C to 85
C
Output Short-Circuit Duration ......................... Indefinite
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
GND 1
GND 2
DNC* 3
6 V
OUT
5 DNC*
4 V
IN
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC SOT-23
T
JMAX
= 150
C,
JA
= 230
C/W
*DNC: DO NOT CONNECT
ABSOLUTE AXI U RATI GS
W
W
W
U
PACKAGE/ORDER I FOR ATIO
U
U
W
Operating Temperature Range
(Note 2) ........................................... 40
C to 125
C
Storage Temperature Range
(Note 3) ........................................... 65
C to 150
C
Lead Temperature (Soldering, 10 sec)................. 300
C
OUTPUT
VOLTAGE
S6
PART MARKING*
* The temperature grades and parametric grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider
operating temperature ranges.
AVAILABLE OPTIO S
U
TEMPERATURE RANGE
OUTPUT
INITIAL
TEMPERATURE
0
C to 70
C
40
C to 85
C
VOLTAGE
ACCURACY
COEFFICEINT
ORDER PART NUMBER
ORDER PART NUMBER
1.250V
0.05%
10ppm/
C
LT1790ACS6-1.25
LT1790AIS6-1.25
0.1%
25ppm/
C
LT1790BCS6-1.25
LT1790BIS6-1.25
2.048V
0.05%
10ppm/
C
LT1790ACS6-2.048
LT1790AIS6-2.048
0.1%
25ppm/
C
LT1790BCS6-2.048
LT1790BIS6-2.048
2.500V
0.05%
10ppm/
C
LT1790ACS6-2.5
LT1790AIS6-2.5
0.1%
25ppm/
C
LT1790BCS6-2.5
LT1790BIS6-2.5
3.000V
0.05%
10ppm/
C
LT1790ACS6-3
LT1790AIS6-3
0.1%
25ppm/
C
LT1790BCS6-3
LT1790BIS6-3
3.300V
0.05%
10ppm/
C
LT1790ACS6-3.3
LT1790AIS6-3.3
0.1%
25ppm/
C
LT1790BCS6-3.3
LT1790BIS6-3.3
4.096V
0.05%
10ppm/
C
LT1790ACS6-4.096
LT1790AIS6-4.096
0.1%
25ppm/
C
LT1790BCS6-4.096
LT1790BIS6-4.096
5.000V
0.05%
10ppm/
C
LT1790ACS6-5
LT1790AIS6-5
0.1%
25ppm/
C
LT1790BCS6-5
LT1790BIS6-5
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
1.250V
2.048V
2.500V
3.000V
3.300V
4.096V
5.000V
LTXT
LTXU
LTPZ
LTQA
LTXW
LTQB
LTQC
(Note 1)
3
LT1790
1790fa
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage (Notes 3, 4)
LT1790A
1.24937
1.250
1.25062
V
0.05
0.05
%
LT1790B
1.24875
1.250
1.25125
V
0.10
0.10
%
LT1790AC
q
1.24850
1.250
1.25150
V
q
0.120
0.120
%
LT1790AI
q
1.24781
1.250
1.25219
V
q
0.175
0.175
%
LT1790BC
q
1.24656
1.250
1.25344
V
q
0.275
0.275
%
LT1790BI
q
1.24484
1.250
1.25516
V
q
0.4125
0.4125
%
Output Voltage Temperature Coefficient (Note 5)
T
MIN
T
A
T
MAX
LT1790A
q
5
10
ppm/
C
LT1790B
q
12
25
ppm/
C
Line Regulation
2.6V
V
IN
18V
50
170
ppm/V
q
220
ppm/V
Load Regulation (Note 6)
I
OUT
Source = 5mA, V
IN
= 2.8V
100
160
ppm/mA
q
250
ppm/mA
I
OUT
Sink = 1mA, V
IN
= 3.2V
120
180
ppm/mA
q
250
ppm/mA
Minimum Operating Voltage (Note 7)
V
IN
,
V
OUT
= 0.1%
I
OUT
= 0mA
1.95
2.15
V
q
2.50
V
I
OUT
Source = 5mA
q
2.90
V
I
OUT
Sink = 1mA
q
2.95
V
Supply Current
No Load
35
60
A
q
75
A
Minimum Operating Current--
V
OUT
= 1.25V,
0.1%
100
125
A
Negative Output (See Figure 7)
Turn-On Time
C
LOAD
= 1
F
250
s
Output Noise (Note 8)
0.1Hz
f
10Hz
10
V
P-P
10Hz
f
1kHz
14
V
RMS
Long-Term Drift of Output Voltage (Note 9)
50
ppm/
kHr
Hysteresis (Note 10)
T = 0
C to 70
C
q
40
ppm
T = 40
C to 85
C
q
100
ppm
The
q
denotes specifications that apply over the specified
temperature range, otherwise specifications are at T
A
= 25
C. C
L
= 1
F and V
IN
= 2.6V, unless otherwise noted.
1.25V ELECTRICAL CHARACTERISTICS
4
LT1790
1790fa
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage (Notes 3, 4)
LT1790A
2.04697
2.048
2.04902
V
0.05
0.05
%
LT1790B
2.04595
2.048
2.05005
V
0.10
0.10
%
LT1790AC
q
2.04554
2.048
2.05046
V
q
0.120
0.120
%
LT1790AI
q
2.04442
2.048
2.05158
V
q
0.175
0.175
%
LT1790BC
q
2.04237
2.048
2.05363
V
q
0.275
0.275
%
LT1790BI
q
2.03955
2.048
2.05645
V
q
0.4125
0.4125
%
Output Voltage Temperature Coefficient (Note 5)
T
MIN
T
A
T
MAX
LT1790A
q
5
10
ppm/
C
LT1790B
q
12
25
ppm/
C
Line Regulation
2.8V
V
IN
18V
50
170
ppm/V
q
220
ppm/V
Load Regulation (Note 6)
I
OUT
Source = 5mA
120
200
ppm/mA
q
280
ppm/mA
I
OUT
Sink = 3mA
130
260
ppm/mA
q
450
ppm/mA
Dropout Voltage (Note 7)
V
IN
V
OUT
,
V
OUT
= 0.1%
I
OUT
= 0mA
50
100
mV
q
500
mV
I
OUT
Source = 5mA
q
750
mV
I
OUT
Sink = 3mA
q
450
mV
Supply Current
No Load
35
60
A
q
75
A
Minimum Operating Current--
V
OUT
= 2.048V, 0.1%
100
125
A
Negative Output (See Figure 7)
Turn-On Time
C
LOAD
= 1
F
350
s
Output Noise (Note 8)
0.1Hz
f
10Hz
22
V
P-P
10Hz
f
1kHz
41
V
RMS
Long-Term Drift of Output Voltage (Note 9)
50
ppm/
kHr
Hysteresis (Note 10)
T = 0
C to 70
C
q
40
ppm
T = 40
C to 85
C
q
100
ppm
The
q
denotes specifications that apply over the specified
temperature range, otherwise specifications are at T
A
= 25
C. C
L
= 1
F and V
IN
= 2.8V, unless otherwise noted.
2.048V ELECTRICAL CHARACTERISTICS
5
LT1790
1790fa
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage (Notes 3, 4)
LT1790A
2.49875
2.5
2.50125
V
0.05
0.05
%
LT1790B
2.4975
2.5
2.5025
V
0.10
0.10
%
LT1790AC
q
2.4970
2.5
2.5030
V
q
0.120
0.120
%
LT1790AI
q
2.49563
2.5
2.50438
V
q
0.175
0.175
%
LT1790BC
q
2.49313
2.5
2.50688
V
q
0.275
0.275
%
LT1790BI
q
2.48969
2.5
2.51031
V
q
0.4125
0.4125
%
Output Voltage Temperature Coefficient (Note 5)
T
MIN
T
A
T
MAX
LT1790A
q
5
10
ppm/
C
LT1790B
q
12
25
ppm/
C
Line Regulation
3V
V
IN
18V
50
170
ppm/V
q
220
ppm/V
Load Regulation (Note 6)
I
OUT
Source = 5mA
80
160
ppm/mA
q
250
ppm/mA
I
OUT
Sink = 3mA
70
110
ppm/mA
q
300
ppm/mA
Dropout Voltage (Note 7)
V
IN
V
OUT
,
V
OUT
= 0.1%
I
OUT
= 0mA
50
100
mV
q
120
mV
I
OUT
Source = 5mA
q
450
mV
I
OUT
Sink = 3mA
q
250
mV
Supply Current
No Load
35
60
A
q
80
A
Minimum Operating Current--
V
OUT
= 2.5V, 0.1%
100
125
A
Negative Output (See Figure 7)
Turn-On Time
C
LOAD
= 1
F
700
s
Output Noise (Note 8)
0.1Hz
f
10Hz
32
V
P-P
10Hz
f
1kHz
48
V
RMS
Long-Term Drift of Output Voltage (Note 9)
50
ppm/
kHr
Hysteresis (Note 10)
T = 0
C to 70
C
q
40
ppm
T = 40
C to 85
C
q
100
ppm
The
q
denotes specifications that apply over the specified
temperature range, otherwise specifications are at T
A
= 25
C. C
L
= 1
F and V
IN
= 3V, unless otherwise noted.
2.5V ELECTRICAL CHARACTERISTICS