* 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
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
COEFFICEINT
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
1790fa
2
U
U
W
W W
U
U
W
(Note 1)
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
1.250V
2.048V
2.500V
3.000V
3.300V
4.096V
5.000V
S6
PART MARKING*
LTXT
LTXU
LTPZ
LTQA
LTXW
LTQB
LTQC
LT1790
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
q
denotes specifications that 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
–0.10
q
q
q
q
q
q
q
q
q
q
q
TYP
1.250
1.250
1.250
1.250
1.250
1.250
MAX
1.25062
0.05
1.25125
0.10
1.25150
0.120
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
60
75
125
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
µA
µA
µA
µs
µV
P-P
µV
RMS
ppm/√kHr
ppm
ppm
1.24850
–0.120
1.24781
–0.175
1.24656
–0.275
1.24484
–0.4125
5
12
50
100
Line Regulation
Load Regulation (Note 6)
I
OUT
Source = 5mA, V
IN
= 2.8V
q
I
OUT
Sink = 1mA, V
IN
= 3.2V
q
120
Minimum Operating Voltage (Note 7)
V
IN
,
∆V
OUT
= 0.1%
I
OUT
= 0mA
I
OUT
Source = 5mA
I
OUT
Sink = 1mA
q
q
q
1.95
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)
No Load
q
35
100
250
10
14
50
q
q
V
OUT
= – 1.25V,
±0.1%
C
LOAD
= 1µF
0.1Hz
≤
f
≤
10Hz
10Hz
≤
f
≤
1kHz
∆T
= 0°C to 70°C
∆T
= – 40°C to 85°C
40
100
1790fa
3
LT1790
2.048V 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
2.8V
≤
V
IN
≤
18V
The
q
denotes specifications that apply over the specified
temperature range, otherwise specifications are at T
A
= 25°C. C
L
= 1µF and V
IN
= 2.8V, unless otherwise noted.
MIN
2.04697
–0.05
2.04595
–0.10
q
q
q
q
q
q
q
q
q
q
q
TYP
2.048
2.048
2.048
2.048
2.048
2.048
MAX
2.04902
0.05
2.05005
0.10
2.05046
0.120
2.05158
0.175
2.05363
0.275
2.05645
0.4125
10
25
170
220
200
280
260
450
100
500
750
450
60
75
125
UNITS
V
%
V
%
V
%
V
%
V
%
V
%
ppm/°C
ppm/°C
ppm/V
ppm/V
ppm/mA
ppm/mA
ppm/mA
ppm/mA
mV
mV
mV
mV
µA
µA
µA
µs
µV
P-P
µV
RMS
ppm/√kHr
ppm
ppm
2.04554
–0.120
2.04442
–0.175
2.04237
–0.275
2.03955
–0.4125
5
12
50
120
Line Regulation
Load Regulation (Note 6)
I
OUT
Source = 5mA
q
I
OUT
Sink = 3mA
q
130
Dropout Voltage (Note 7)
V
IN
– V
OUT
,
∆V
OUT
= 0.1%
I
OUT
= 0mA
I
OUT
Source = 5mA
I
OUT
Sink = 3mA
q
q
q
50
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)
No Load
q
35
100
350
22
41
50
q
q
V
OUT
= – 2.048V, 0.1%
C
LOAD
= 1µF
0.1Hz
≤
f
≤
10Hz
10Hz
≤
f
≤
1kHz
∆T
= 0°C to 70°C
∆T
= – 40°C to 85°C
40
100
1790fa
4
LT1790
2.5V 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
3V
≤
V
IN
≤
18V
The
q
denotes specifications that apply over the specified
temperature range, otherwise specifications are at T
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