REF19x Series
ELECTRICAL CHARACTERISTICS—REF191 @
−40°C
≤ T
A
≤+125°C
@ V
S
= 3.3 V, −40°C ≤ T
A
≤ +125°C, unless otherwise noted.
Table 4.
Parameter
TEMPERATURE COEFFICIENT
1, 2
E Grade
F Grade
G Grade
3
LINE REGULATION
4
E Grade
F and G Grades
LOAD REGULATION
4
E Grade
F and G Grades
DROPOUT VOLTAGE
Mnemonic
TCV
O
/°C
Condition
I
OUT
= 0 mA
Min
Typ
2
5
10
10
20
10
20
1.25
1.55
Max
Unit
ppm/°C
ppm/°C
ppm/°C
ppm/V
ppm/V
ppm/mA
ppm/mA
V
V
ΔV
O
/ΔV
IN
3.0 V ≤ V
S
≤ 15 V, I
OUT
= 0 mA
ΔV
O
/ΔV
LOAD
V
S
− V
O
V
S
= 5.0 V, 0 mA ≤ I
OUT
≤ 20 mA
V
S
= 3.3 V, I
LOAD
= 10 mA
V
S
= 3.6 V, I
LOAD
= 20 mA
1
2
For proper operation, a 1 μF capacitor is required between the output pin and the GND pin of the device.
TCV
O
is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCV
O
= (V
MAX
−
V
MIN
)/V
O
(T
MAX
−
T
MIN
)
3
Guaranteed by characterization.
4
Line and load regulation specifications include the effect of self-heating.
ELECTRICAL CHARACTERISTICS—REF192 @ T
A
= 25°C
@ V
S
= 3.3 V, T
A
= 25°C, unless otherwise noted.
Table 5.
Parameter
INITIAL ACCURACY
1
E Grade
F Grade
G Grade
LINE REGULATION
2
E Grade
F and G Grades
LOAD REGULATION
2
E Grade
F and G Grades
DROPOUT VOLTAGE
LONG-TERM STABILITY
3
NOISE VOLTAGE
1
2
Mnemonic
V
O
Condition
I
OUT
= 0 mA
Min
2.498
2.495
2.490
Typ
2.500
Max
2.502
2.505
2.510
4
8
10
15
1.00
1.40
Unit
V
V
V
ppm/V
ppm/V
ppm/mA
ppm/mA
V
V
mV
μV p-p
ΔV
O
/ΔV
IN
3.0 V ≤ V
S
≤ 15 V, I
OUT
= 0 mA
2
4
4
6
ΔV
O
/ΔV
LOAD
V
S
− V
O
DV
O
e
N
V
S
= 5.0 V, 0 mA ≤ I
OUT
≤ 30 mA
V
S
= 3.5 V, I
LOAD
= 10 mA
V
S
= 3.9 V, I
LOAD
= 30 mA
1000 hours @ 125°C
0.1 Hz to 10 Hz
1.2
25
Initial accuracy includes temperature hysteresis effect.
Line and load regulation specifications include the effect of self-heating.
3
Long-term stability specification is noncumulative. The drift in subsequent 1000-hour periods is significantly lower than in the first 1000-hour period.
Rev. I | Page 5 of 28
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