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LM385BS8-2.5 [Linear]

Micropower Voltage Reference; 微功耗电压参考
LM385BS8-2.5
型号： LM385BS8-2.5
厂家： Linear    Linear
描述：

Micropower Voltage Reference
微功耗电压参考
文件： 总4页 (文件大小：170K)
中文：  中文翻译
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LM185-2.5/  
LM285-2.5/LM385-2.5  
Micropower Voltage  
Reference  
U
DESCRIPTIO  
EATURE  
S
F
■
■
■
■
20µA to 20mA Operating Range  
Guaranteed 1% Initial Voltage Tolerance  
Guaranteed 1Ω Dynamic Impedance  
Very Low Power Consumption  
The LM185-2.5 is a two-terminal band gap reference  
diode that has been designed for applications which  
require precision performance with micropower opera-  
tion. The device provides guaranteed operation specifica-  
tions at currents as low as 20µA. The nominal voltage is  
2.5V with both 1% and 2% tolerances available. Some  
additional features are: maximum dynamic impedance of  
1Ω, low noise and excellent stability over time and tem-  
perature. The advanced design, processing and testing  
techniques make Linear’s LM185-2.5 a superior choice  
over previous designs. A circuit for cold junction compen-  
sation of a thermocouple is shown below.  
O U  
PPLICATI  
S
A
■
■
■
■
■
Portable Meter References  
Portable Test Instruments  
Battery-Operated Systems  
Panel Meters  
Current Loop Instrumentation  
For applications requiring guaranteed temperature drift,  
see the LT1034 data sheet.  
U
O
TYPICAL APPLICATI  
Thermocouple Cold Junction Compensator  
Reverse Voltage Change  
16  
I
Q
≈ 50µA  
–55°C ≤ T ≤ +125°C  
A
V
IN  
16k  
1M  
12  
8
R
SET  
LM334  
2 MERCURY  
CELLS 2.6V  
100k W.W.  
ZERO  
–
V
2k  
LM385-2.5  
4
950Ω  
450Ω  
10k ADJUST  
FOR 12.17mV  
AT 25°C  
0
ACROSS 450Ω  
+
–
–4  
0.01  
TYPE K  
0.1  
1
10  
100  
METER  
LM185-2.5 TA01  
REVERSE CURRENT (mA)  
LM185-2.5 TA02  
1
LM185-2.5/  
LM285-2.5/LM385-2.5  
W W W  
U
ABSOLUTE AXI U RATI GS  
Reverse Breakdown Current ................................ 30mA  
Forward Current................................................... 10mA  
Operating Temperature Range  
Storage Temperature Range  
LM185-2.5 .................................... –65°C to 150°C  
LM285-2.5 .................................... –65°C to 150°C  
LM385-2.5 .................................... –65°C to 150°C  
Lead Temperature (Soldering, 10 sec.)................ 300°C  
LM185-2.5 ..................................... –55°C to 125°C  
LM285-2.5 ...................................... –40°C to 85°C  
LM385-2.5 ........................................... 0°C to 70°C  
W
U
/O  
PACKAGE RDER I FOR ATIO  
ORDER PART  
ORDER PART  
NUMBER  
ORDER PART  
NUMBER  
TOP VIEW  
NUMBER  
BOTTOM VIEW  
BOTTOM VIEW  
NC  
NC  
1
2
3
4
8
7
6
5
LM285S8-2.5  
LM385S8-2.5  
LM385BS8-2.5  
3
2
1
LM285Z-2.5  
LM385Z-2.5  
LM385BZ-2.5  
(NOTE 2)  
LM185H-2.5  
LM285H-2.5  
LM385H-2.5  
LM385BH-2.5  
(NOTE 2)  
NC  
1
2
NC  
NC  
(DO NOT  
USE)  
PART MARKING  
Z PACKAGE  
H PACKAGE  
2-LEAD TO-46 METAL CAN  
3-LEAD TO-92 PLASTIC  
S8 PACKAGE  
8-LEAD PLASTIC SO  
2852  
3852  
3852B  
LM185-2.5 PO02  
LM185-2.5 PO01  
LM185-2.5 PO03  
ELECTRICAL CHARACTERISTICS (See Note 1)  
LM385-2.5/385B-2.5  
MIN TYP MAX  
LM185-2.5/285-2.5  
SYMBOL PARAMETER  
CONDITIONS  
T = 25°C, 20µA ≤ I ≤ 20mA  
MIN  
TYP  
MAX  
UNITS  
V
Z
Reverse Breakdown Voltage  
A
R
LM185-2.5/285-2.5  
LM385-2.5  
LM385B-2.5 (Note 2)  
2.462  
2.500 2.538  
20  
V
V
V
2.425 2.500 2.575  
2.462 2.500 2.538  
∆V  
∆Temp  
Average Temperature Coefficient  
Minimum Operating Current  
20µA ≤ I ≤ 20mA (Note 2)  
20  
ppm/°C  
Z
R
I
T
≤ T ≤ T  
MAX  
●
●
●
●
8
20  
8
20  
µA  
MIN  
MIN  
A
∆V  
Reverse Breakdown Voltage  
Change With Current  
20µA ≤ I ≤ 1mA  
R
Z
∆I  
T = 25°C  
1.0  
1.5  
2.0  
2.5  
mV  
mV  
R
A
T
≤ T ≤ T  
MIN  
A MAX  
1mA ≤ I ≤ 20mA  
R
T = 25°C  
10  
20  
20  
25  
mV  
mV  
A
T
≤ T ≤ T  
MIN  
A MAX  
r
Z
Reverse Dynamic Impedance  
I = 100µA (Note 3)  
R
T = 25°C  
0.2  
0.6  
1.5  
0.4  
1.0  
1.5  
Ω
Ω
A
T
≤ T ≤ T  
MIN  
A MAX  
e
Wide Band Noise (RMS)  
Long Term Stability  
10Hz ≤ f ≤ 10kHz, I = 100µA  
120  
20  
120  
20  
µV  
n
R
∆V  
T = 25°C ± 0.1°C, I = 100µA  
ppm/kHr  
Z
A
R
∆Time  
The  
range.  
●
denotes specifications which apply over the operating temperature  
Note 2: For very low initial tolerance, consult LT1004 data sheet. The  
LT1004 is a low cost, pin for pin substitution device. For guaranteed  
temperature coefficient consult the LT1034-2.5 data sheet.  
Note 1: All specifications are for T = 25°C unless otherwise noted. For  
A
the LM185-2.5 T  
= –55°C and T  
= 85°C. For LM385-2.5, T  
= 125°C. For LM285-2.5, T  
=
Note 3: Guaranteed but not tested.  
MIN  
MAX  
MIN  
–40°C and T  
= 0°C and T = 70°C.  
MAX  
MIN  
MAX  
2
LM185-2.5/  
LM285-2.5/LM385-2.5  
U W  
TYPICAL PERFOR A CE CHARACTERISTICS  
Reverse Characteristics  
Forward Characteristics  
Temperature Drift  
2.525  
1.6  
1.2  
100  
10  
1
T
= 25°C  
–55°C TO 125°C  
A
2.520  
2.515  
2.510  
2.505  
2.500  
2.495  
2.490  
2.485  
2.480  
0.8  
0.4  
0
0.1  
0
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
0.01  
0.1  
1
10  
100  
85  
105 125  
–55 –35 –15  
5
25 45 65  
REVERSE VOLTAGE (V)  
FORWARD CURRENT (mA)  
TEMPERATURE (°C)  
LM185-2.5 • TPC02  
LM185-2.5 • TPC01  
LM185-2.5 • TPC03  
Reverse Dynamic Impedance  
Reverse Dynamic Impedance  
Noise Voltage  
1000  
100  
10  
1400  
1200  
10k  
1k  
f = 25Hz  
–55°C TO 125°C  
T
I
= 25°C  
= 100µA  
A
R
1000  
800  
600  
400  
200  
0
100  
10  
1
1
0.1  
0.1  
0.01  
0.1  
1
10  
100  
10  
100  
1k  
10k  
100k  
10  
100  
1k  
10k  
100k  
1M  
REVERSE CURRENT (mA)  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
LM185-2.5 • TPC05  
LM185-2.5M • TPC06  
LM185-2.5 • TPC05  
Filtered Output Noise  
Response Time  
120  
100  
80  
60  
40  
20  
0
100mA  
R
4.0  
3.0  
2.0  
1.0  
0
C
OUTPUT  
24k  
V
V
OUT  
IN  
RC LOW PASS  
10k  
5V  
0
INPUT  
100  
100  
1k  
100k  
0
500  
TIME (µS)  
CUTOFF FREQUENCY (Hz)  
LM185-2.5 • TPC07  
LM185-2.5 • TPC08  
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-  
tation that the interconnection of circuits as described herein will not infringe on existing patent rights.  
3
LM185-2.5/  
LM285-2.5/LM385-2.5  
W
W
U
O
SCHE ATIC DIAGRA  
P CA A L AT  
S
TY I L PP IC I  
+
+
V
9V  
7.5k  
Q4  
Q13  
+
3.7V ≤ V ≤ 30V  
200k  
R
Q12  
Q11  
LM334  
220k  
Q3  
Q7  
2.7k  
2.5V  
20pF  
20pF  
2.5V  
LM385-2.5  
50k  
500k  
Q1  
600k  
Q10  
LM385-2.5  
Q2  
Q5  
300k  
Q9  
REFERENCE FROM  
A 9V BATTERY  
OPERATION OVER A  
WIDE SUPPLY RANGE  
Q6  
Q8  
100k  
500Ω  
Q14  
LM185-2.5 TA03  
60k  
500k  
–
LM185-2.5 SD01  
U
PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted.  
H Package, 2-Lead TO-46 Metal Can  
Z package, 3-Lead TO-92 Plastic  
0.060 ± 0.010  
(1.524 ± 0.254)  
0.209 – 0.219  
(5.309 – 5.537)  
0.178 – 0.195  
(4.521 – 4.953)  
0.140 ± 0.010  
(3.556 ± 0.127)  
0.080 – 0.100  
(2.032 – 2.540)  
0.015  
(0.381)  
MAX  
0.500  
(12.700)  
MIN  
10° NOM  
0.060 ± 0.005  
(1.524± 0.127)  
DIA  
0.180 ± 0.005  
(4.572 ± 0.127)  
0.025  
(0.635)  
MAX  
0.90  
(2.286)  
NOM  
0.016 – 0.019  
0.180 ± 0.005  
(0.406 – 0.483)  
(4.572 ± 0.127)  
DIA  
0.100  
(2.540)  
TYP  
0.050  
(1.270)  
TYP  
0.050  
(1.270)  
TYP  
5°  
NOM  
0.050  
(1.270)  
MAX  
UNCONTROLLED  
LEAD DIA  
0.500  
(12.79)  
MIN  
FOR 3-LEAD PACKAGE ONLY  
0.020 ± 0.003  
(0.508 ± 0.076)  
45°  
0.028 – 0.048  
(0.711 – 1.219)  
0.036 – 0.046  
(0.914 – 1.168)  
0.015 ± 0.02  
(0.381 ± 0.051)  
0.016 ± 0.03  
H3(46) 0592  
(0.406 ± 0.076)  
0.050 ± 0.005  
Z3 1191  
(1.270 ± 0.127)  
TJMAX  
θJA  
θJC  
TJMAX  
θJA  
150°C 440°C/W 80°CW  
100°C 160°C/W  
S8 package, 8-Lead Plastic SOIC  
0.189 – 0.197  
(4.801 – 5.004)  
0.010 – 0.020  
(0.254 – 0.508)  
7
5
8
6
× 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)  
0.228 – 0.244  
0.150 – 0.157  
(5.791 – 6.197)  
(3.810 – 3.988)  
0.016 – 0.050  
0.406 – 1.270  
0.050  
(1.270)  
BSC  
0.014 – 0.019  
(0.355 – 0.483)  
0°– 8° TYP  
S8 0392  
TJMAX  
θJA  
1
2
3
4
150°C 220°C/W  
LT/GP 0892 1K REV B  
Linear Technology Corporation  
1630 McCarthy Blvd., Milpitas, CA 95035-7487  
4
●
●
LINEAR TECHNOLOGY CORPORATION 1992  
(408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977  

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