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LM385BH-1.2 [Linear]

Micropower Voltage Reference; 微功耗电压参考
LM385BH-1.2
型号： LM385BH-1.2
厂家： Linear    Linear
描述：

Micropower Voltage Reference
微功耗电压参考

电源电路 参考电压源
文件： 总8页 (文件大小：143K)
中文：  中文翻译
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LM185-1.2/  
LM285-1.2/LM385-1.2  
Micropower Voltage  
Reference  
U
FEATURES  
DESCRIPTIO  
■
10µA to 20mA Operating Range  
TheLM185-1.2isatwoterminalbandgapreferencediode  
that has been designed for applications which require  
precision performance with micropower operation. The  
device provides guaranteed operating specifications at  
currents as low as 10µA. The nominal voltage is 1.235V  
with both 1% and 2% tolerances available. Some addi-  
tional features are: maximum dynamic impedance of 1Ω,  
low noise and excellent stability over time and tempera-  
ture. Advanceddesign, processingandtestingtechniques  
make Linear’s LM185-1.2 a superior choice over previous  
designs. A micropower 5V reference application is shown  
below.ForguaranteedTC,micropowerreferences,seethe  
■
Guaranteed 1% Initial Voltage Tolerance  
■
Guaranteed 1Ω Dynamic Impedance  
Very Low Power Consumption  
■
U
APPLICATIO S  
■
Portable Meter References  
■
Portable Test Instruments  
■
Battery Operated Systems  
Current Loop Instrumentation  
■
LT1034 data sheet.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATIO  
Reverse Voltage Change with Current  
Micropower 5V Reference  
V
IN  
7V TO 15V  
10  
T
A
= 25°C  
+
V
8
6
R
LM334  
5.6k  
–
V
7
3
2
4
+
–
6
5V  
LT1494  
4
2
LM385-1.2  
3.01M  
1%  
150pF  
0
1M  
1%  
–2  
185/285/385 TA01a  
0.01  
0.1  
1
10  
100  
REVERSE CURRENT (mA)  
185/285/385 TA01b  
1
LM185-1.2/  
LM285-1.2/LM385-1.2  
W W U W  
ABSOLUTE AXI U RATI GS  
Operating Temperature Range  
Storage Temperature Range ................. –65°C to 150°C  
Lead Temperature (Soldering, 10 sec).................. 300°C  
Reverse Breakdown Current ................................. 30mA  
Forward Current ................................................... 10mA  
LM185-1.2(OBSOLETE) ............... –55°C to 125°C  
LM285-1.2 ..........................................–40°C to 85°C  
LM385-1.2 .............................................. 0°C to 70°C  
U
W
U
PACKAGE/ORDER I FOR ATIO  
ORDER PART  
BOTTOM VIEW  
ORDER PART  
NUMBER  
BOTTOM VIEW  
NUMBER  
1
2
LM185H-1.2  
LM285H-1.2  
LM385H-1.2  
LM385BH-1.2  
LM285Z-1.2  
LM385Z-1.2  
LM385BZ-1.2  
Z PACKAGE  
H PACKAGE  
3-LEAD PLASTIC TO-92  
2-LEAD TO-46 METAL CAN  
T
JMAX = 150°C,  
TJMAX = 150°C, θJA = 160°C/W  
θJA = 440°C/W, θJC = 80°C/W  
(NOTE 3)  
(NOTE 3)  
OBSOLETE PACKAGE  
Consider the S8 or Z Packages for Alternate Source  
ORDER PART  
NUMBER  
TOP VIEW  
NC  
NC  
NC  
1
8
7
6
5
LM385BS8-1.2  
2
3
4
NC  
LM385S8-1.2  
S8 PART  
MARKING  
NC  
(DO  
NOT USE)  
S8 PACKAGE  
8-LEAD PLASTIC SO  
3851  
3851B  
TJMAX = 150°C, θJA = 190°C/W  
Consult LTC Marketing for parts specified with wider operating temperature ranges.  
2
LM185-1.2/  
LM285-1.2/LM385-1.2  
ELECTRICAL CHARACTERISTICS  
The ● denotes the specifications which apply over the full operating  
temperature range, otherwise specifications are at TA = 25°C. For the LM185-1.2 TMIN = –55°C and TMAX = 125°C. For LM285-1.2  
TMIN = –40°C and TMAX = 85°C.For LM385-1.2 TMIN = 0°C and TMAX = 70°C. For MIL-STD components, please refer to LTC883C data  
sheet for test listing and parameters.  
LM185-1.2/LM285-1.2  
LM385-1.2/LM385B-1.2  
SYMBOL PARAMETER  
CONDITIONS  
TA = 25°C, I ≤ I ≤ 20mA  
MIN R  
MIN  
TYP  
MAX  
MIN  
TYP  
MAX  
UNITS  
V
Reverse Breakdown Voltage  
Z
LM185-1.2  
LM385-1.2  
1.223 1.235  
1.247  
V
V
V
1.205  
1.223  
1.235  
1.235  
1.260  
1.247  
LM385B-1.2 (Note 3)  
≤ I ≤ 20mA (Notes 2, 3)  
∆V  
∆Temp  
Average Temperature Coefficient  
Minimum Operating Current  
I
20  
8
20  
ppm/°C  
Z
MIN  
R
I
T
≤ T ≤ T  
MAX  
●
●
●
●
10  
8
15  
µA  
MIN  
MIN  
A
∆V  
Reverse Breakdown Voltage  
Change with Current  
I
≤ I ≤ 1mA  
R
Z
MIN  
∆I  
T = 25°C  
1
1.5  
1
1.5  
mV  
mV  
R
A
T
MIN  
≤ T ≤ T  
A
MAX  
1mA ≤ I ≤ 20mA  
R
T = 25°C  
10  
20  
10  
25  
mV  
mV  
A
T
MIN  
≤ T ≤ T  
A
MAX  
r
Reverse Dynamic Impedance  
I = 100µA  
R
Z
T =25°C  
0.2  
0.6  
1.5  
0.4  
1.0  
1.5  
Ω
Ω
A
T
MIN  
≤ T ≤ T  
A
MAX  
e
Wideband Noise (RMS)  
Long Term Stability  
I = 100µA, 10Hz ≤ f ≤ 10kHz  
60  
20  
60  
20  
µV  
n
R
∆V  
I = 100µA, TA = 25°C ± 0.1°C  
R
ppm/kHr  
Z
∆Time  
Note 1: Absolute Maximum Ratings are those values beyond which the life  
of a device may be impaired.  
Note 3: For applications requiring low initial tolerance guaranteed over  
temperature consult the LT1004 data sheet.  
Note 2: Selected devices with guaranteed maximum temperature  
coefficient are available upon request.  
3
LM185-1.2/  
LM285-1.2/LM385-1.2  
U W  
TYPICAL PERFOR A CE CHARACTERISTICS  
Foward Characteristics  
Reverse Characteristics  
1.2  
100  
10  
1
T
= 25°C  
A
–55°C TO 125°C  
0.8  
0.4  
0
0.1  
0.01  
0.1  
1
10  
100  
0.8  
REVERSE VOLTAGE (V)  
1.2 1.4  
0
0.2  
0.4 0.6  
1.0  
FORWARD CURRENT (mA)  
185/285/385 G02  
185/285/385 G01  
Reverse Dynamic Impedance  
Temperature Drift  
Reverse Dynamic Impedance  
100  
10k  
1k  
1.245  
1.240  
1.235  
1.230  
–55°C TO 125°C  
T
R
= 25°C  
A
f = 25Hz  
I
= 100µA  
10  
1
100  
10  
1
0.1  
0.1  
0.01  
0.1  
1
10  
100  
10  
100  
1k  
10k  
100k  
1M  
–55 –35 –15  
5
25 45 65 85 105 125  
REVERSE CURRENT (mA)  
FREQUENCY (Hz)  
TEMPERATURE (°C)  
185/285/385 G04  
185/285/385 G05  
185/285/385 G03  
Response Time  
Noise Voltage  
Filtered Output Noise  
2.0  
1.5  
1.0  
0.5  
0
700  
600  
500  
400  
300  
200  
100  
0
70  
60  
50  
40  
30  
20  
10  
0
I
= 100µA  
I
R
= 100µA  
R
RC LOW PASS  
OUTPUT  
100µA  
R
36k  
V
V
IN  
OUT  
C
5
INPUT  
0
–5  
–100  
100  
200  
TIME (µs)  
300  
400  
500  
0
10  
100  
1k  
10k  
100k  
100  
1k  
10k  
100k  
FREQUENCY (Hz)  
CUTOFF FREQUENCY (Hz)  
185/285/385 G06  
185/285/385 G07  
185/285/385 G08  
4
LM185-1.2/  
LM285-1.2/LM385-1.2  
W
W
SCHE ATIC DIAGRA  
+
7.5k  
Q13  
Q4  
Q12  
Q11  
200k  
Q3  
Q7  
20pF  
20pF  
Q1  
50k  
600k  
Q10  
Q2  
Q5  
300k  
Q9  
Q6  
Q8  
Q14  
100k  
500Ω  
60k  
–
185/285/385 SD  
5
LM185-1.2/  
LM285-1.2/LM385-1.2  
U
PACKAGE DESCRIPTIO  
H Package  
2-Lead and 3-Lead TO-46 Metal Can  
(Reference LTC DWG # 05-08-1340)  
0.100  
(2.540)  
TYP  
0.209 – 0.219  
(5.309 – 5.537)  
0.178 – 0.195  
(4.521 – 4.953)  
0.050  
(1.270)  
TYP  
0.050  
(1.270)  
TYP  
0.085 – 0.105  
(2.159 – 2.667)  
PIN 1  
0.500  
(12.700)  
MIN  
FOR 3-LEAD PACKAGE ONLY  
REFERENCE  
PLANE  
45°  
*
0.028 – 0.048  
(0.711 – 1.219)  
0.036 – 0.046  
(0.914 – 1.168)  
0.025  
(0.635)  
MAX  
H02/03(TO-46) 1098  
0.016 – 0.021**  
*LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE  
AND 0.045" BELOW THE REFERENCE PLANE  
0.016 – 0.024  
**FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS  
(0.406 – 0.610)  
(0.406 – 0.533)  
DIA  
OBSOLETE PACKAGE  
Z Package  
3-Lead Plastic TO-92 (Similar to TO-226)  
(Reference LTC DWG # 05-08-1410)  
0.180 ± 0.005  
(4.572 ± 0.127)  
0.060 ± 0.005  
(1.524± 0.127)  
DIA  
0.90  
(2.286)  
NOM  
0.180 ± 0.005  
(4.572 ± 0.127)  
5°  
NOM  
0.500  
(12.70)  
MIN  
0.050  
(1.270)  
MAX  
UNCONTROLLED  
LEAD DIMENSION  
0.016 ± 0.003  
0.015 ± 0.002  
(0.406 ± 0.076)  
(0.381 ± 0.051)  
0.050  
(1.27)  
BSC  
Z3 (TO-92) 0401  
0.098 +016/–0.04  
(2.5 +0.4/–0.1)  
2 PLCS  
0.060 ± 0.010  
(1.524 ± 0.254)  
TO-92 TAPE AND REEL  
REFER TO TAPE AND REEL SECTION OF  
LTC DATA BOOK FOR ADDITIONAL INFORMATION  
0.140 ± 0.010  
(3.556 ± 0.127)  
10° NOM  
6
LM185-1.2/  
LM285-1.2/LM385-1.2  
U
PACKAGE DESCRIPTIO  
S8 Package  
8-Lead Plastic Small Outline (Narrow .150 Inch)  
(Reference LTC DWG # 05-08-1610)  
0.189 – 0.197*  
(4.801 – 5.004)  
7
5
8
6
0.150 – 0.157**  
(3.810 – 3.988)  
0.228 – 0.244  
(5.791 – 6.197)  
SO8 1298  
1
3
4
2
0.010 – 0.020  
(0.254 – 0.508)  
× 45°  
0.053 – 0.069  
(1.346 – 1.752)  
0.004 – 0.010  
(0.101 – 0.254)  
0.008 – 0.010  
(0.203 – 0.254)  
0°– 8° TYP  
0.016 – 0.050  
(0.406 – 1.270)  
0.050  
(1.270)  
BSC  
0.014 – 0.019  
(0.355 – 0.483)  
TYP  
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH  
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE  
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD  
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-  
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.  
7
LM185-1.2/  
LM285-1.2/LM385-1.2  
U
TYPICAL APPLICATIO S  
1.2V Reference from 1.5V Battery  
Micropower Reference for 9V Battery  
9V  
1.5V  
510k  
3k  
1.23V  
1.23V  
LM385-1.2  
LM385-1.2  
185/285/385 TA02  
185/285/385 TA03  
RELATED PARTS  
PART NUMBER  
LT1004-1.2  
LT1034  
DESCRIPTION  
COMMENTS  
Micropower Shunt Reference  
1.2V Micropower Shunt Reference  
0.3% Initial Accuracy  
40ppm/°C Max Temperature Coefficient  
18512fa LT/CP 0901 1.5K REV A • PRINTED IN USA  
LinearTechnology Corporation  
1630 McCarthy Blvd., Milpitas, CA 95035-7417  
8
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com  
LINEAR TECHNOLOGY CORPORATION 1985  

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