LOW POWER, BANDGAP
VOLTAGE REFERENCES
LM285/285B-1.2V
LM285/285B-2.5V
LM385/385B-1.2V
LM385/385B-2.5V
ABSOLUTE MAXIMUM RATINGS*
Lead Temperature (Soldering, 10 sec)
TO-92 Package .............................................. +300°C
Surface Mount Package ................................. +300°C
Power Dissipation
Limited by Forward/Reverse Current
*Functional operation above the absolute maximum stress ratings is not
implied.
Forward Current .................................................... +10mA
Reverse Current.................................................... +30mA
Storage Temperature Range ................ – 65°C to +150°C
Operating Temperature Range
TO-92 Package ................................ – 40°C to +85°C
Surface Mount Package ................... – 40°C to +85°C
ELECTRICAL CHARACTERISTICS: TA = +25°C, unless otherwise specified.
LM285 / LM285B–1.2
LM385 / LM385B–1.2
Symbol Parameter
Test Conditions
Min
Typ Max
Min
Typ Max
Unit
V(BR)R
Reverse Breakdown Voltage
I
R ≤ 20mA
V
LM285B-1.2/LM385B-1.2
TA = Tlow to Thigh (Note 1)
LM285-1.2V/LM385-1.2V
TA = Tlow to Thigh (Note 1)
1.223
1.200
1.205
1.192
1.235 1.247
1.223
1.210
1.205
1.192
1.235 1.247
—
1.270
—
1.260
1.235 1.260
1.235 1.260
—
1.273
—
1.273
IRMIN
Minimum Operating Current
TA = +25°C
TA = Tlow to Thigh (Note 1)
µA
—
—
8.0
—
15
20
—
—
8.0
—
15
20
∆V(BR)R
Reverse Breakdown Voltage
Change with Current
mV
IRmin = IR = 1.0mA, TA = +25°C
TA = Tlow to Thigh (Note 1)
1.0mA = IR = 20mA, TA = +25°C
TA = Tlow to Thigh (Note 1)
—
—
—
—
—
—
—
—
1.0
1.5
10
—
—
—
—
—
—
—
—
1.0
1.5
20
20
25
Z
Reverse Dynamic Impedance
IR = 100µA
—
—
—
0.6
30
20
—
100
—
—
—
—
0.6
30
20
—
100
—
Ω
∆V(BR)/∆T Average Temperature Coefficient 10µA ≤ IR ≤ 20mA
ppm/°C
ppm/kHR
S
Long Term Stability
IR = 100µA,
TA = +25°C ±0.1°C
LM285 / LM285B–2.5
LM385 / LM385B–2.5
Symbol Parameter
Test Conditions
Min
Typ Max
Min
Typ Max
Unit
V(BR)R
Reverse Breakdown Voltage
IR = 20mA
V
LM285B-2.5/LM385B-2.5
TA = Tlow to Thigh (Note 1)
LM285-2.5V/LM385-2.5V
TA = Tlow to Thigh (Note 1)
2.462
2.415
2.425
2.400
2.5
—
2.5
—
2.538
2.585
2.575
2.600
2.462
2.436
2.425
2.400
2.5
—
2.5
—
2.538
2.564
2.575
2.600
IRMIN
Minimum Operating Current
TA = +25°C
TA = Tlow to Thigh (Note 1)
µA
—
—
13
—
20
30
—
—
13
—
20
30
∆V(BR)R
Reverse Breakdown Voltage
Change with Current
mV
IRmin = IR = 1.0mA, TA = +25°C
TA = Tlow to Thigh (Note 1)
1.0mA = IR = 20mA, TA = +25°C
TA = Tlow to Thigh (Note 1)
—
—
—
—
—
—
—
—
1.0
1.5
10
—
—
—
—
—
—
—
—
2.0
2.5
20
20
25
Z
Reverse Dynamic Impedance
IR = 100µA
—
—
—
0.6
30
20
—
100
—
—
—
—
0.6
30
20
—
100
—
Ω
∆V(BR)/∆T Average Temperature Coefficient 20µA ≤ IR ≤ 20mA
ppm/°C
ppm/kHR
S
Long Term Stability
IR = 100µA,
TA = +25°C ±0.1°C
Note: 1. Tlow = – 40°C for LM285-1.2, LM285-2.5, LM285B-1.2, LM285B-2.5
0°C for LM385-1.2, LM385B-1.2, LM385-2.5, LM385B-2.5
Thigh = +85°C for LM285-1.2, LM285-2.5, LM285B-1.2, LM285B-2.5
+70°C for LM385-1.2, LM385B-1.2, LM385-2.5, LM385B-2.5
3-10
TELCOM SEMICONDUCTOR, INC.
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