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
(SO–8)
(Bottom View)
132
8
7
6
5
Cathode
N.C.
N.C.
N.C.
4
3
2
Anode
N.C.
N.C.
1N.C.
N.C.
Cathode
Anode
–
+
LM385–1.2
1.235 V
3.3 k
1.5 V
Battery
Standard Application
Device
Operating
Temperature
Range Tolerance
LM285D–1.2
LM285Z–1.2 TA = –40° to
+85°C
±1.0%
LM285D–2.5
LM285Z–2.5
LM385BD–1.2
LM385BZ–1.2
LM385D–1.2
LM385Z–1.2
LM385BD–2.5
LM385BZ–2.5
LM385D–2.5
LM385Z–2.5
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
The LM285/LM385 series are micropower two–terminal bandgap voltage
regulator diodes. Designed to operate over a wide current range of 10 µA 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 on–chip 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 TO–226AA 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 µA to 20 mA
•1.0%, 1.5%, 2.0% and 3.0% Initial Tolerance Grades
•Low Temperature Coefficient
•1.0 Ω Dynamic Impedance
•Surface Mount Package Available
Representative Schematic Diagram
Open
for 1.235 V
10 k
Cathode
Anode
100 k500
Ω
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
2MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATINGS (TA = 25°C, unless otherwise noted)
Rating Symbol Value Unit
Reverse Current IR30 mA
Forward Current IF10 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)
LM285–1.2 LM385–1.2/LM385B–1.2
Characteristic Symbol Min Typ Max Min Typ Max Unit
Reverse Breakdown Voltage (IRmin
p
IR
p
20 mA) V(BR)R V
LM285–1.2/LM385B–1.2 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
LM385–1.2 – – – 1.205 1.235 1.260
TA = Tlow to Thigh (Note 1) – – – 1.192 – 1.273
Minimum Operating Current IRmin µA
TA = 25°C – 8.0 10 – 8.0 15
TA = Tlow to Thigh (Note 1) – – 20 – – 20
Reverse Breakdown V oltage 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 µA, TA = +25°C
Average Temperature Coef ficient ∆V(BR)/∆T – 80 – – 80 – ppm/°C
10 µA
p
IR
p
20 mA, TA = Tlow to Thigh (Note 1)
Wideband Noise (RMS) n – 60 – – 60 – µV
IR = 100 µA, 10 Hz
p
f
p
10 kHz
Long Term Stability S – 20 – – 20 – ppm/
IR = 100 µA, TA = +25°C ± 0.1°C kHR
LM285 LM385, B
3
MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise noted)
LM285–2.5 LM385–2.5/LM385B–2.5
Characteristic Symbol Min Typ Max Min Typ Max Unit
Reverse Breakdown Voltage (IRmin
p
IR
p
20 mA) V(BR)R V
LM285–2.5/LM385B–2.5 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
LM385–2.5 – – – 2.425 2.5 2.575
TA = Tlow to Thigh (Note 1) – – – 2.400 – 2.600
Minimum Operating Current IRmin µA
TA = 25°C – 13 20 – 13 20
TA = Tlow to Thigh (Note 1) – – 30 – – 30
Reverse Breakdown V oltage 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 µA, TA = +25°C
Average Temperature Coef ficient ∆V(BR)/∆T – 80 – – 80 – ppm/°C
20 µA
p
IR
p
20 mA, TA = Tlow to Thigh (Note 1)
Wideband Noise (RMS) n – 120 – – 120 – µV
IR = 100 µA, 10 Hz
p
f
p
10 kHz
Long Term Stability S – 20 – – 20 – ppm/
IR = 100 µA, TA = +25°C ± 0.1°C kHR
NOTES: 1.Tlow = – 40°C for LM285–1.2, LM285–2.5 Thigh = +85°C for LM285–1.2, LM285–2.5
= 0°C for LM385–1.2, LM385B–1.2, LM385–2.5, LM385B–2.5 Thigh =+70°C for LM385–1.2, LM385B–1.2, LM385–2.5, LM385B–2.5
LM285 LM385, B
4MOTOROLA ANALOG IC DEVICE DATA
1.1
t, TIME (ms)
0 1.00.90.80.70.60.30.20.1
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 k10 K10
0
125
250
375
750
625
500
f, FREQUENCY (Hz)
en, NOISE (nV/ Hz)
125
TA, AMBIENT TEMPERATURE (
°
C)
1.210
1.220
1.230
1.240
1.250
1007550025–25–50
V(BR)R, REVERSE VOLTAGE (V)
100.01 1001.00.1
1.2
1.0
0.8
0.6
0.4
0.2
0
IF, FORW ARD CURRENT (mA)
VF, FORWARD VOLTAGE (V)
TYPICAL PERFORMANCE CURVES FOR LM285–1.2/385–1.2/385B–1.2
0.2 0.4 0.6 0.8 1.0 1.2
10
1.4
100
1.0
0.1 0V(BR), REVERSE VOLTAGE (V)
Figure 1. Reverse Characteristics
, REVERSE CURRENT ( A)
µ
IR
Figure 2. Reverse Characteristics
0.1 1.0 10 1000.01
8.0
6.0
4.0
2.0
0
–2.0
10
IR, REVERSE CURRENT (mA)
V(BR)R, REVERSE VOLTAGE CHANGE (mV)
∆
TA = +85
°
C
+25
°
C–40
°
C
T
A = +85
°
C
+25
°
C
–40
°
C
Figure 3. Forward Characteristics
TA = –40
°
C
+25
°
C+85
°
C
Figure 4. Temperature Drift
IR = 100
µ
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 1.00.90.80.70.60.30.20.1
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 k10 K10
0
250
500
750
1500
1250
1000
f, FREQUENCY (Hz)
en, NOISE (nV/ Hz)
125
TA, AMBIENT TEMPERATURE (
°
C)
2.450
2.470
2.490
2.510
2.520
1007550025–25–50
V(BR)R, REVERSE VOLTAGE (V)
100.01 1001.00.1
1.2
1.0
0.8
0.6
0.4
0.2
0
IF, FORW ARD CURRENT (mA)
VF, FORWARD VOLTAGE (V)
TYPICAL PERFORMANCE CURVES FOR LM285–2.5/385–2.5/385B–2.5
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)
µ
IR
Figure 8. Reverse Characteristics
0.1 1.0 10 1000.01
8.0
6.0
4.0
2.0
0
–2.0
10
IR, REVERSE CURRENT (mA)
V(BR)R, REVERSE VOLTAGE CHANGE (mV)
∆
TA = +85
°
C
+25
°
C
–40
°
C
T
A = +85
°
C
+25
°
C–40
°
C
Figure 9. Forward Characteristics
TA = –40
°
C
+25
°
C
+85
°
C
Figure 10. Temperature Drift
IR = 100
µ
A
Figure 11. Noise Voltage Figure 12. Response Time
2.460
2.480
2.500
LM285 LM385, B
6MOTOROLA ANALOG IC DEVICE DATA
Z SUFFIX
PLASTIC PACKAGE
CASE 29–04
ISSUE AD
OUTLINE DIMENSIONS
D SUFFIX
PLASTIC PACKAGE
CASE 751–05
(SO–8)
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 X–X
C
V
D
N
N
XX
SEATING
PLANE DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A0.175 0.205 4.45 5.20
B0.170 0.210 4.32 5.33
C0.125 0.165 3.18 4.19
D0.016 0.022 0.41 0.55
F0.016 0.019 0.41 0.48
G0.045 0.055 1.15 1.39
H0.095 0.105 2.42 2.66
J0.015 0.020 0.39 0.50
K0.500 ––– 12.70 –––
L0.250 ––– 6.35 –––
N0.080 0.105 2.04 2.66
P––– 0.100 ––– 2.54
R0.115 ––– 2.93 –––
V0.135 ––– 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
14
58
C
K
4X P
A0.25 (0.010) MTBSS
0.25 (0.010) MBM
8X D
R
MJ
X 45
_
_
F
–A–
–B–
–T–
DIM MIN MAX MIN MAX
INCHESMILLIMETERS
A4.80 5.00 0.189 0.196
B3.80 4.00 0.150 0.157
C1.35 1.75 0.054 0.068
D0.35 0.49 0.014 0.019
F0.40 1.25 0.016 0.049
G1.27 BSC 0.050 BSC
J0.18 0.25 0.007 0.009
K0.10 0.25 0.004 0.009
M0 7 0 7
P5.80 6.20 0.229 0.244
R0.25 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/Af firmative Action Employer .
How to reach us:
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LM285/D
*LM285/D*
◊
