REF19x Series
ELECTRICAL CHARACTERISTICS—REF191 @ −40°C ≤ TA ≤+125°C
@ VS = 3.3 V, −40°C ≤ TA ≤ +125°C, unless otherwise noted.
Table 4.
Parameter
TEMPERATURE COEFFICIENT1, 2
Mnemonic
Condition
Min
Typ
Max Unit
E Grade
F Grade
G Grade3
TCVO/°C
IOUT = 0 mA
2
5
10
ppm/°C
ppm/°C
ppm/°C
LINE REGULATION4
E Grade
ΔVO/ΔVIN
3.0 V ≤ VS ≤ 15 V, IOUT = 0 mA
VS = 5.0 V, 0 mA ≤ IOUT ≤ 20 mA
10
20
ppm/V
ppm/V
F and G Grades
LOAD REGULATION4
E Grade
F and G Grades
DROPOUT VOLTAGE
ΔVO/ΔVLOAD
VS − VO
10
20
ppm/mA
ppm/mA
VS = 3.3 V, ILOAD = 10 mA
VS = 3.6 V, ILOAD = 20 mA
1.25
1.55
V
V
1 For proper operation, a 1 μF capacitor is required between the output pin and the GND pin of the device.
2 TCVO is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCVO = (VMAX − VMIN)/VO(TMAX − TMIN
)
3 Guaranteed by characterization.
4 Line and load regulation specifications include the effect of self-heating.
ELECTRICAL CHARACTERISTICS—REF192 @ TA = 25°C
@ VS = 3.3 V, TA = 25°C, unless otherwise noted.
Table 5.
Parameter
INITIAL ACCURACY1
Mnemonic
Condition
Min
Typ
Max
Unit
E Grade
F Grade
G Grade
VO
IOUT = 0 mA
2.498
2.495
2.490
2.500
2.502
2.505
2.510
V
V
V
LINE REGULATION2
E Grade
ΔVO/ΔVIN
3.0 V ≤ VS ≤ 15 V, IOUT = 0 mA
VS = 5.0 V, 0 mA ≤ IOUT ≤ 30 mA
2
4
4
8
ppm/V
ppm/V
F and G Grades
LOAD REGULATION2
E Grade
F and G Grades
DROPOUT VOLTAGE
ΔVO/ΔVLOAD
VS − VO
4
6
10
15
ppm/mA
ppm/mA
V
VS = 3.5 V, ILOAD = 10 mA
VS = 3.9 V, ILOAD = 30 mA
1000 hours @ 125°C
0.1 Hz to 10 Hz
1.00
1.40
V
LONG-TERM STABILITY3
NOISE VOLTAGE
DVO
eN
1.2
25
mV
μV p-p
1 Initial accuracy includes temperature hysteresis effect.
2 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