Data Sheet ADR420/ADR421/ADR423/ADR425
Rev. J | Page 5 of 24
ADR421 ELECTRICAL SPECIFICATIONS
V
IN
= 5.0 V to 15.0 V, T
A
= 25°C, unless otherwise noted.
Table 3.
Parameter Symbol Conditions Min Typ Max Unit
OUTPUT VOLTAGE V
OUT
A Grade 2.497 2.500 2.503 V
B Grade 2.499 2.500 2.501 V
INITIAL ACCURACY
1
V
OUTERR
A Grade −3 +3 mV
−0.12 +0.12 %
B Grade −1 +1 mV
−0.04 +0.04 %
TEMPERATURE COEFFICIENT TCV
OUT
−40°C < T
A
< +125°C
A Grade 2 10 ppm/°C
B Grade
1 3 ppm/°C
SUPPLY VOLTAGE HEADROOM V
IN
− V
OUT
2 V
LINE REGULATION ∆V
OUT
/∆V
IN
V
IN
= 5 V to 18 V,
−40°C < T
A
< +125°C
10 35 ppm/V
LOAD REGULATION ∆V
OUT
/∆I
L
I
L
= 0 mA to 10 mA,
−40°C < T
A
< +125°C
70 ppm/mA
QUIESCENT CURRENT I
IN
No load 390 500 µA
−40°C < T
A
< +125°C
600 µA
VOLTAGE NOISE e
N
p-p 0.1 Hz to 10 Hz 1.75 µV p-p
VOLTAGE NOISE DENSITY e
N
1 kHz 80 nV/√Hz
TURN-ON SETTLING TIME t
R
10 µs
LONG-TERM STABILITY ∆V
OUT
1000 hours 50 ppm
OUTPUT VOLTAGE HYSTERESIS V
OUT_HYS
40 ppm
RIPPLE REJECTION RATIO RRR f
IN
= 1 kHz
−75 dB
SHORT CIRCUIT TO GND I
SC
27 mA
1
Initial accuracy does not include shift due to solder heat effect.
