LM185BYH-1.2-SMD [TI]
LM185-1.2QML Micropower Voltage Reference Diode; LM185-1.2QML微功耗电压基准二极管
| 型号： | LM185BYH-1.2-SMD |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | LM185-1.2QML Micropower Voltage Reference Diode |
| 文件： | 总13页 (文件大小：726K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LM185-1.2QML
LM185-1.2QML Micropower Voltage Reference Diode
Literature Number: SNVS384
October 2005
LM185-1.2QML
Micropower Voltage Reference Diode
The extremely low power drain of the LM185-1.2 makes it
useful for micropower circuitry. This voltage reference can be
used to make portable meters, regulators or general purpose
analog circuitry with battery life approaching shelf life.
General Description
The LM185-1.2 is a micropower 2-terminal band-gap voltage
regulator diodes. Operating over a 10µA to 20mA current
range, it features exceptionally low dynamic impedance and
good temperature stability. On-chip trimming is used to pro-
vide tight voltage tolerance. Since the LM185-1.2 band-gap
reference uses only transistors and resistors, low noise and
good long term stability result.
Further, the wide operating current allows it to replace older
references with a tighter tolerance part.
Features
n Operating current of 10µA to 20mA
n 1Ω maximum dynamic impedance (typical)
n Low temperature coefficient
n Low voltage reference - 1.235V
Careful design of the LM185-1.2 has made the device ex-
ceptionally tolerant of capacitive loading, making it easy to
use in almost any reference application. The wide dynamic
operating range allows its use with widely varying supplies
with excellent regulation.
Ordering Information
NS Part Number
LM185E-1.2/883
LM185H-1.2-SMD
LM185H-1.2-QV
JAN Part Number
5962–87594012A
5962–8759401XA
5962–8759401VXA
5962–8759401YA
5962–8759405XA
5962–8759401VYA
NS Package Number
Package Description
20LD LCC
E20A
H02A
2 LD T0–46
H02A
2 LD T0–46
LM185WG-1.2/883
LM185BYH-1.2-SMD
LM185WG-1.2-QV
WG10A
H02A
10LD Ceramic SOIC
2 LD T0–46
WG10A
10LD Ceramic SOIC
Connection Diagrams
TO-46
Hermetic Leadless Chip Carrier (E)
Metal Can Package (H)
20156106
Bottom View
20156135
See NS Package Number E20A
See NS Package Number H02A
© 2005 National Semiconductor Corporation
DS201561
www.national.com
Connection Diagrams (Continued)
Ceramic SOIC (WG)
20156134
See NS Package Number WG10A
Schematic Diagram
20156107
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2
Absolute Maximum Ratings (Note 1)
Reverse Current
30mA
10mA
Forward Current
Operating Temperature Range
Maximum Junction Temperature (TJmax) (Note 2)
Storage Temperature
Lead Temperature (Soldering 10 Seconds)
Ceramic SOIC
−55˚C ≤ TA ≤ +125˚C
+150˚C
−55˚C ≤ TA ≤ +150˚C
260˚C
300˚C
300˚C
TO-46 package
20LD LCC package
Thermal Resistance
θJA
Metal Can (Still Air)
Metal Can (500LF / Min Air Flow)
20LD LCC (Still Air)
20LD LCC (500LF / Min Air Flow)
Ceramic SOIC (Still Air)
Ceramic SOIC (500LF / Min Air Flow)
θJC
300˚C/W
139˚C/W
100˚C/W
73˚C/W
194˚C/W
128˚C/W
Metal Can
57˚C/W
25˚C/W
23˚C/W
20LD LCC
Ceramic SOIC
Package Weight (Typical)
Metal Can
TBD
TBD
20LD LCC
Ceramic SOIC
210mg
4KV
ESD Tolerance (Note 3)
Quality Conformance Inspection
Mil-Std-883, Method 5005 - Group A
Subgroup
Description
Static tests at
Temp ˚C
25
1
2
Static tests at
125
-55
25
3
Static tests at
4
Dynamic tests at
Dynamic tests at
Dynamic tests at
Functional tests at
Functional tests at
Functional tests at
Switching tests at
Switching tests at
Switching tests at
Settling time at
Settling time at
Settling time at
5
125
-55
25
6
7
8A
8B
9
125
-55
25
10
11
12
13
14
125
-55
25
125
-55
3
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LM185–1.2 Electrical Characteristics
DC Parameters
Sub-
groups
Symbol
VRef
Parameter
Conditions
Notes
Min Max
Units
Reverse Breakdown Voltage
IR = 10µA
IR = 20µA
IR = 1mA
1.223 1.247
1.205 1.26
1.223 1.247
1.205 1.26
1.223 1.247
1.205 1.26
V
V
1
2, 3
1
V
V
2, 3
1
IR = 20mA
V
V
2, 3
1
∆VRef / ∆IR Reverse Breakdown Voltage
10µA ≤ IR ≤ 1mA
20µA ≤ IR ≤ 1mA
1mA ≤ IR ≤ 20mA
-1.0
-1.5
1.0
1.5
mV
mV
mV
mV
V
Change with Current
2, 3
1
-10.0 10.0
-20.0 20.0
2, 3
1
VF
Forward Bias Voltage
IF = 2mA
-1.0
-0.4
DC Drift Parameters
Delta calculations performed on QMLV devices at group B , subgroup 5, unless otherwise specified on the IPI.
Sub-
groups
Symbol
VR
Parameter
Conditions
Notes
Min Max
Units
Reverse Breakdown Voltage
IR = 10µA
IR = 20mA
-0.01 0.01
-0.01 0.01
V
V
1
1
LM185BY–1.2 Electrical Characteristics
DC Parameters
Sub-
groups
1
Symbol
VRef
Parameter
Conditions
Notes
Min Max
Units
Reverse Breakdown Voltage
IR = 10µA
IR = 20µA
IR = 1mA
1.223 1.247
1.205 1.26
1.223 1.247
1.205 1.26
1.223 1.247
1.205 1.26
V
V
2, 3
1
V
V
2, 3
1
IR = 20mA
V
V
2, 3
1
∆VRef / ∆IR Reverse Breakdown Voltage
10µA ≤ IR ≤ 1mA
20µA ≤ IR ≤ 1mA
1mA ≤ IR ≤ 20mA
-1.0
-1.5
1.0
1.5
mV
mV
mV
mV
V
Change with Current
2, 3
1
-10.0 10.0
-20.0 20.0
2, 3
1
VF
TC
Forward Bias Voltage
IF = 2mA
-1.0
-0.4
50
Temperature Coefficient
(Note 4)
PPM/˚C
2, 3
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed
specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test
conditions.
Note 2: The maximum power dissipation must be derated at elevated temperatures and is dictated by T
(maximum junction temperature), θ (package junction
JA
Jmax
to ambient thermal resistance), and T (ambient temperature). The maximum allowable power dissipation at any temperature is P
= (T
- T )/θ or the
A
Dmax
Jmax A JA
number given in the Absolute Maximum Ratings, whichever is lower.
Note 3: Human body model, 1.5KΩ in series with 100pF.
Note 4: The average temperature coefficient is defined as the maximum deviation of reference voltage, at all measured temperatures between the operating T
Min
& T , divided by (T
Max
− T ). The measured temperatures (T
Min
) are −55˚C, 25˚C, & 125˚C or ∆V
Measured
/ (T
− T
Min
)
Max
Ref
Max
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4
Typical Performance Characteristics
Reverse Characteristics
Reverse Characteristics
20156113
20156114
Temperature Drift of 3
Representative Units
Forward Characteristics
20156116
20156115
Reverse Dynamic Impedance
Reverse Dynamic Impedance
20156118
20156117
5
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Typical Performance Characteristics (Continued)
Noise Voltage
Filtered Output Noise
20156120
20156119
Response Time
20156121
Typical Applications
Reference from
1.5V Battery
Wide Input
Range Reference
20156123
20156108
Micropower Reference
from 9V Battery
20156122
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6
Typical Applications (Continued)
Precision 1µA to 1mA Current Sources
Micropower* 5V Regulator
20156126
20156124
*I . 30µA
Q
Micropower* 10V Reference
20156127
20156125
*I .20µA standby current
Q
7
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Typical Applications (Continued)
METER THERMOMETERS
Centigrade Thermometer
0˚C−100˚C Thermometer
20156101
20156128
Calibration
Calibration
1. Adjust R1 so that V1 = temp at 1mV/˚K
2. Adjust V2 to 273.2mV
1. Short LM385-1.2, adjust R3 for I
= temp at 1µA/˚K
OUT
2. Remove short, adjust R2 for correct reading in centigrade
†
I
for 1.3V to 1.6V battery volt-
Q
†
I
at 1.3V.500µA
Q
age = 50µA to 150µA
I
Q
at 1.6V.2.4mA
Micropower Thermocouple Cold Junction
Compensator
Lower Power Thermometer
20156129
*2N3638 or 2N2907 select for inverse H . 5
FE
†
Select for operation at 1.3V
. 600µA to 900µA
‡
I
Q
0˚F−50˚F Thermometer
20156131
Adjustment Procedure
1. Adjust TC ADJ pot until voltage across R1 equals Kelvin temperature
multiplied by the thermocouple Seebeck coefficient.
2. Adjust zero ADJ pot until voltage across R2 equals the thermocouple
Seebeck coefficient multiplied by 273.2.
Thermocouple Seebeck R1 R2 Voltage
Voltage
Across
R2
Type
Coefficient (Ω) (Ω) Across
R1
@
(µV/˚C)
25˚C
(mV)
(mV)
15.60
12.77
12.17
1.908
20156130
J
T
K
S
52.3
42.8
40.8
6.4
5231.24k
432 1k
412953Ω
63.4150Ω
14.32
11.78
11.17
1.766
Calibration
1. Short LM385-1.2, adjust R3 for I
= temp at 1.8µA/˚K
OUT
2. Remove short, adjust R2 for correct reading in ˚F
Typical supply current 50µA
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8
Revision History Section
Released
Revision
Section
Originator
Changes
10/07/05
A
New Release, Corporate format
L. Lytle
2 MDS data sheets converted into one Corp.
data sheet format. MNLM185-1.2-X Rev 2A3
and MNLM185BY-1.2-X Rev 0B0 data
sheets will be archived.
9
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Physical Dimensions inches (millimeters) unless otherwise noted
TO-46 Metal Can Package (H)
NS Package Number H02A
Leadless Chip Carrier Package (E)
NS Package Number E20A
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10
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Ceramic SOIC Package (WG)
NS Package Number WG10A
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相关型号：
LM185BYH-1.2/NOPB
IC 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.235 V, MBCY2, HERMETIC SEALED, METAL CAN, TO-46, 2 PIN, Voltage Reference
NSC
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