Datasheet

ADR121/ADR125/ADR127
Rev. B | Page 3 of 20
SPECIFICATIONS
ADR121 ELECTRICAL CHARACTERISTICS
T
A
= 25°C, V
IN
= 2.8 V to 18 V, I
OUT
= 0 mA, unless otherwise noted.
Table 1.
Parameter Symbol Conditions/Comments Min Typ Max Unit
OUTPUT VOLTAGE V
OUT
B Grade 2.497 2.5 2.503 V
A Grade 2.494 2.5 2.506 V
INITIAL ACCURACY ERROR V
OERR
B Grade −0.12 +0.12 %
A Grade −0.24 +0.24 %
TEMPERATURE COEFFICIENT TCV
OUT
−40°C < T
A
< +125°C
B Grade 3 9 ppm/°C
A Grade 15 25 ppm/°C
DROPOUT (V
OUT
− V
IN
) V
DO
I
OUT
= 0 mA 300 mV
LOAD REGULATION
−40°C < T
A
< +125°C; V
IN
= 5.0 V,
0 mA < I
OUT
< 5 mA
80 300 ppm/mA
−40°C < T
A
< +125°C; V
IN
= 5.0 V,
−2 mA < I
OUT
< 0 mA
50 300 ppm/mA
LINE REGULATION 2.8 V to 18 V, I
OUT
= 0 mA −50 +3 +50 ppm/V
PSRR f = 60 Hz −90 dB
QUIESCENT CURRENT I
Q
−40°C < T
A
< +125°C, no load
V
IN
= 18 V 95 125 μA
V
IN
= 2.8 V 80 95 μA
SHORT-CIRCUIT CURRENT TO GROUND V
IN
= 2.8 V 18 mA
V
IN
= 18 V 40 mA
VOLTAGE NOISE f = 10 kHz 500 nV/√Hz
f = 0.1 Hz to 10 Hz 18 μV p-p
TURN-ON SETTLING TIME To 0.1%, C
L
= 0.2 μF 100 μs
LONG-TERM STABILITY 1000 hours @ 25°C 150 ppm/1000 hrs
OUTPUT VOLTAGE HYSTERESIS See the Terminology section 300 ppm