REF3212-EP, REF3220-EP, REF3225-EP
REF3230-EP, REF3233-EP, REF3240-EP
SBVS078B –OCTOBER 2006–REVISED AUGUST 2011
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Electrical Characteristics
Boldface limits apply over the listed temperature range.
TA = 25°C, ILOAD = 0 mA, and VIN = 5 V (unless otherwise noted)
PARAMETER
REF3212 (1.25 V)
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Output voltage
Initial accuracy
Output voltage noise
Voltage noise
1.2475
1.25 1.2525
V
%
VOUT
–0.2
0.01
17
0.2
f = 0.1 Hz to 10 Hz
f = 10 Hz to 10 kHz
μVPP
μVRMS
Noise
24
REF3220 (2.048 V)
Output
voltage
2.044
2.048
0.01
2.052
0.2
V
VOUT
Initial
accuracy
–0.2
%
Output
voltage noise
f = 0.1 Hz to 10 Hz
27
39
μVPP
Noise
Voltage noise f = 10 Hz to 10 kHz
μVRMS
REF3225 (2.5 V)
Output voltage
Initial accuracy
2.495
2.5
0.01
33
2.505
0.2
V
%
VOUT
–0.2
Output voltage noise
Voltage noise
f = 0.1 Hz to 10 Hz
f = 10 Hz to 10 kHz
μVPP
μVRMS
Noise
48
REF3230 (3 V)
Output voltage
2.994
3
0.01
39
3.006
0.2
V
%
VOUT
Initial accuracy
–0.2
Output voltage noise
Voltage noise
f = 0.1 Hz to 10 Hz
f = 10 Hz to 10 kHz
μVPP
μVRMS
Noise
57
REF3233 (3.3 V)
Output voltage
3.293
3.3
0.01
43
3.307
0.2
V
%
VOUT
Initial accuracy
–0.2
Output voltage noise
Voltage noise
f = 0.1 Hz to 10 Hz
f = 10 Hz to 10 kHz
μVPP
μVRMS
Noise
63
REF3240 (4.096 V)
Output voltage
4.088
4.096
0.01
53
4.104
0.2
V
%
VOUT
Initial accuracy
–0.2
Output voltage noise
Voltage noise
f = 0.1 Hz to 10 Hz
f = 10 Hz to 10 kHz
μVPP
μVRMS
Noise
78
REF3212/REF3220/REF3225/REF3230/REF3233/REF3240
TA = 25°C
4
10.5
55
7
dVOUT/dT Output voltage temperature drift
ppm/°C
–55°C ≤ TA ≤ 125°C
0 tp 1000 h
VOUT + 0.05(1) ≤ VIN ≤ 5.5 V
0 mA < ILOAD < 10 mA, VIN = VOUT + 250 mV(1)
–10 mA < ILOAD < 0 mA, VIN = VOUT + 100 mV(1)
40
Long-term stability
Line regulation
ppm
–65
–40
–60
15
65 ppm/V
Sourcing
Sinking
3
40
dVOUT
dILOAD
/
Load
μV/mA
60
regulation(2)
20
First cycle
100
Thermal
dT
ppm
hysteresis(3)
Additional
cycles
25
5
VIN
VOUT
–
Dropout voltage(1)
25°C ≤ TA ≤ +125°C
50
mV
(1) The minimum supply voltage for the REF3212 is 1.8 V.
(2) Load regulation is using force and sense lines; see the Load Regulation section for more information.
(3) Thermal hysteresis procedure is explained in more detail in the Applications Information section.
4
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Product Folder Link(s): REF3212-EP, REF3220-EP, REF3225-EP REF3230-EP, REF3233-EP, REF3240-EP