LM285
LM385, B
SEMICONDUCTOR
TECHNICAL DATA
MICROPOWER VOLTAGE
REFERENCE DIODES
ORDERING INFORMATION
Order this document by LM285/D
Z SUFFIX
PLASTIC PACKAGE
CASE 29
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO8)
(Bottom View)
1
3
2
8
7
6
5
Cathode
N.C.
N.C.
N.C.
4
3
2
Anode
N.C.
N.C.
1
N.C.
N.C.
Cathode
Anode
+
LM3851.2
1.235 V
3.3 k
1.5 V
Battery
Standard Application
Device
Operating
Temperature
Range
Tolerance
LM285D1.2
LM285Z1.2
TA = 40
to
+85
C
1.0%
LM285D2.5
LM285Z2.5
LM385BD1.2
LM385BZ1.2
LM385D1.2
LM385Z1.2
LM385BD2.5
LM385BZ2.5
LM385D2.5
LM385Z2.5
Reverse
Break
down
Voltage
1.235 V
1.5%
2.500 V
TA = 0
to
+70
C
1.0%
1.235 V
2.0%
1.235 V
1.5%
2.500 V
3.0%
2.500 V
1
MOTOROLA ANALOG IC DEVICE DATA
Micropower Voltage
Reference Diodes
The LM285/LM385 series are micropower twoterminal bandgap voltage
regulator diodes. Designed to operate over a wide current range of 10
A to
20 mA, these devices feature exceptionally low dynamic impedance, low
noise and stable operation over time and temperature. Tight voltage
tolerances are achieved by onchip trimming. The large dynamic operating
range enables these devices to be used in applications with widely varying
supplies with excellent regulation. Extremely low operating current make
these devices ideal for micropower circuitry like portable instrumentation,
regulators and other analog circuitry where extended battery life is required.
The LM285/LM385 series are packaged in a low cost TO226AA plastic
case and are available in two voltage versions of 1.235 and 2.500 V as
denoted by the device suffix (see Ordering Information table). The LM285 is
specified over a 40
C to +85
C temperature range while the LM385 is rated
from 0
C to +70
C.
The LM385 is also available in a surface mount plastic package in
voltages of 1.235 and 2.500 V.
Operating Current from 10
A to 20 mA
1.0%, 1.5%, 2.0% and 3.0% Initial Tolerance Grades
Low Temperature Coefficient
1.0
Dynamic Impedance
Surface Mount Package Available
Representative Schematic Diagram
Open
for 1.235 V
10 k
Cathode
Anode
100 k
500
600 k
600 k
425 k
74.3 k
8.45 k
600 k
360 k
Open
for 2.5 V
Motorola, Inc. 1996
Rev 2
LM285 LM385, B
2
MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATINGS
(TA = 25
C, unless otherwise noted)
Rating
Symbol
Value
Unit
Reverse Current
IR
30
mA
Forward Current
IF
10
mA
Operating Ambient Temperature Range
TA
C
LM285
LM385
40 to + 85
0 to +70
Operating Junction Temperature
TJ
+ 150
C
Storage Temperature Range
Tstg
65 to + 150
C
ELECTRICAL CHARACTERISTICS
(TA = 25
C, unless otherwise noted)
LM2851.2
LM3851.2/LM385B1.2
Characteristic
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Reverse Breakdown Voltage (IRmin
p
IR
p
20 mA)
V(BR)R
V
LM2851.2/LM385B1.2
1.223
1.235
1.247
1.223
1.235
1.247
TA = Tlow to Thigh (Note 1)
1.200
1.270
1.210
1.260
LM3851.2
1.205
1.235
1.260
TA = Tlow to Thigh (Note 1)
1.192
1.273
Minimum Operating Current
IRmin
A
TA = 25
C
8.0
10
8.0
15
TA = Tlow to Thigh (Note 1)
20
20
Reverse Breakdown Voltage Change with Current
V(BR)R
mV
IRmin
p
IR
p
1.0 mA, TA = +25
C
1.0
1.0
TA = Tlow to Thigh (Note 1)
1.5
1.5
1.0 mA
p
IR
p
20 mA, TA = +25
C
10
20
TA = Tlow to Thigh (Note 1)
20
25
Reverse Dynamic Impedance
Z
0.6
0.6
W
IR = 100
A, TA = +25
C
Average Temperature Coefficient
V(BR)/
T
80
80
ppm/
C
10
A
p
IR
p
20 mA, TA = Tlow to Thigh (Note 1)
Wideband Noise (RMS)
n
60
60
V
IR = 100
A, 10 Hz
p
f
p
10 kHz
Long Term Stability
S
20
20
ppm/
IR = 100
A, TA = +25
C
0.1
C
kHR
LM285 LM385, B
3
MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS
(TA = 25
C, unless otherwise noted)
LM2852.5
LM3852.5/LM385B2.5
Characteristic
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Reverse Breakdown Voltage (IRmin
p
IR
p
20 mA)
V(BR)R
V
LM2852.5/LM385B2.5
2.462
2.5
2.538
2.462
2.5
2.538
TA = Tlow to Thigh (Note 1)
2.415
2.585
2.436
2.564
LM3852.5
2.425
2.5
2.575
TA = Tlow to Thigh (Note 1)
2.400
2.600
Minimum Operating Current
IRmin
A
TA = 25
C
13
20
13
20
TA = Tlow to Thigh (Note 1)
30
30
Reverse Breakdown Voltage Change with Current
V(BR)R
mV
IRmin
p
IR
p
1.0 mA, TA = +25
C
1.0
2.0
TA = Tlow to Thigh (Note 1)
1.5
2.5
1.0 mA
p
IR
p
20 mA, TA = +25
C
10
20
TA = Tlow to Thigh (Note 1)
20
25
Reverse Dynamic Impedance
Z
0.6
0.6
W
IR = 100
A, TA = +25
C
Average Temperature Coefficient
V(BR)/
T
80
80
ppm/
C
20
A
p
IR
p
20 mA, TA = Tlow to Thigh (Note 1)
Wideband Noise (RMS)
n
120
120
V
IR = 100
A, 10 Hz
p
f
p
10 kHz
Long Term Stability
S
20
20
ppm/
IR = 100
A, TA = +25
C
0.1
C
kHR
NOTES: 1. Tlow = 40
C for LM2851.2, LM2852.5
Thigh = +85
C for LM2851.2, LM2852.5
= 0
C for LM3851.2, LM385B1.2, LM3852.5, LM385B2.5
Thigh
= +70
C for LM3851.2, LM385B1.2, LM3852.5, LM385B2.5
LM285 LM385, B
4
MOTOROLA ANALOG IC DEVICE DATA
1.1
t, TIME (ms)
0
1.0
0.9
0.8
0.7
0.6
0.3
0.2
0.1
1.25
1.50
0.75
0.50
0
5.0
0.25
10
0
1.00
OUTPUT
(V)
INPUT
(V)
Input
DUT
Output
100 k
100
875
1.0 K
100 k
10 K
10
0
125
250
375
750
625
500
f, FREQUENCY (Hz)
e
n
, NOISE (nV/
Hz)
125
TA , AMBIENT TEMPERATURE (
C)
1.210
1.220
1.230
1.240
1.250
100
75
50
0
25
25
50
V
(BR)R
, REVERSE VOL
T
AGE (V)
10
0.01
100
1.0
0.1
1.2
1.0
0.8
0.6
0.4
0.2
0
IF , FORWARD CURRENT (mA)
V
F, FOR
W
ARD
VOL
T
AGE
(V)
TYPICAL PERFORMANCE CURVES FOR LM2851.2/3851.2/385B1.2
0.2
0.4
0.6
0.8
1.0
1.2
10
1.4
100
1.0
0.1
0
V(BR), REVERSE VOLTAGE (V)
Figure 1. Reverse Characteristics
, REVERSE CURRENT
(
A
)
I R
Figure 2. Reverse Characteristics
0.1
1.0
10
100
0.01
8.0
6.0
4.0
2.0
0
2.0
10
IR, REVERSE CURRENT (mA)
V
(BR)R
, REVERSE VOL
T
AGE
CHANGE
(mV)
TA = + 85
C
+ 25
C
40
C
TA = + 85
C
+ 25
C
40
C
Figure 3. Forward Characteristics
TA = 40
C
+ 25
C
+ 85
C
Figure 4. Temperature Drift
IR = 100
A
Figure 5. Noise Voltage
Figure 6. Response Time
LM285 LM385, B
5
MOTOROLA ANALOG IC DEVICE DATA
V(BR), REVERSE VOLTAGE (V)
1.1
t, TIME (ms)
0
1.0
0.9
0.8
0.7
0.6
0.3
0.2
0.1
2.50
3.00
1.50
1.00
0
5.0
0.50
10
0
2.00
OUTPUT
(V)
INPUT
(V)
Input
DUT
Output
100 k
100
1.0 K
100 k
10 K
10
0
250
500
750
1500
1250
1000
f, FREQUENCY (Hz)
e
n
, NOISE (nV/
Hz)
125
TA , AMBIENT TEMPERATURE (
C)
2.450
2.470
2.490
2.510
2.520
100
75
50
0
25
25
50
V
(BR)R
, REVERSE VOL
T
AGE (V)
10
0.01
100
1.0
0.1
1.2
1.0
0.8
0.6
0.4
0.2
0
IF , FORWARD CURRENT (mA)
V
F, FOR
W
ARD
VOL
T
AGE
(V)
TYPICAL PERFORMANCE CURVES FOR LM2852.5/3852.5/385B2.5
0.5
1.0
1.5
2.0
2.5
3.0
10
3.5
100
1.0
0.1
0
Figure 7. Reverse Characteristics
, REVERSE CURRENT
(
A
)
I R
Figure 8. Reverse Characteristics
0.1
1.0
10
100
0.01
8.0
6.0
4.0
2.0
0
2.0
10
IR, REVERSE CURRENT (mA)
V
(BR)R
, REVERSE VOL
T
AGE
CHANGE
(mV)
TA = + 85
C
+ 25
C
40
C
TA = + 85
C
+ 25
C
40
C
Figure 9. Forward Characteristics
TA = 40
C
+ 25
C
+ 85
C
Figure 10. Temperature Drift
IR = 100
A
Figure 11. Noise Voltage
Figure 12. Response Time
2.460
2.480
2.500
LM285 LM385, B
6
MOTOROLA ANALOG IC DEVICE DATA
Z SUFFIX
PLASTIC PACKAGE
CASE 2904
ISSUE AD
OUTLINE DIMENSIONS
D SUFFIX
PLASTIC PACKAGE
CASE 75105
(SO8)
ISSUE N
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. CONTOUR OF PACKAGE BEYOND DIMENSION R
IS UNCONTROLLED.
4. DIMENSION F APPLIES BETWEEN P AND L.
DIMENSION D AND J APPLY BETWEEN L AND K
MINIMUM. LEAD DIMENSION IS UNCONTROLLED
IN P AND BEYOND DIMENSION K MINIMUM.
R
A
P
J
L
F
B
K
G
H
SECTION XX
C
V
D
N
N
X X
SEATING
PLANE
DIM
MIN
MAX
MIN
MAX
MILLIMETERS
INCHES
A
0.175
0.205
4.45
5.20
B
0.170
0.210
4.32
5.33
C
0.125
0.165
3.18
4.19
D
0.016
0.022
0.41
0.55
F
0.016
0.019
0.41
0.48
G
0.045
0.055
1.15
1.39
H
0.095
0.105
2.42
2.66
J
0.015
0.020
0.39
0.50
K
0.500
12.70
L
0.250
6.35
N
0.080
0.105
2.04
2.66
P
0.100
2.54
R
0.115
2.93
V
0.135
3.43
1
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
SEATING
PLANE
1
4
5
8
C
K
4X
P
A
0.25 (0.010)
M
T B
S
S
0.25 (0.010)
M
B
M
8X
D
R
M
J
X 45
_
_
F
A
B
T
DIM
MIN
MAX
MIN
MAX
INCHES
MILLIMETERS
A
4.80
5.00
0.189
0.196
B
3.80
4.00
0.150
0.157
C
1.35
1.75
0.054
0.068
D
0.35
0.49
0.014
0.019
F
0.40
1.25
0.016
0.049
G
1.27 BSC
0.050 BSC
J
0.18
0.25
0.007
0.009
K
0.10
0.25
0.004
0.009
M
0
7
0
7
P
5.80
6.20
0.229
0.244
R
0.25
0.50
0.010
0.019
_
_
_
_
G
LM285 LM385, B
7
MOTOROLA ANALOG IC DEVICE DATA
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals"
must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.
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LM285/D
*LM285/D*
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