LM285Z-2.5#TRPBF [Linear]
LM285-2.5 - Micropower Voltage Reference; Package: TO-92; Pins: 3; Temperature Range: -40°C to 85°C;
| 型号： | LM285Z-2.5#TRPBF |
| 厂家： | 
Linear |
| 描述： | LM285-2.5 - Micropower Voltage Reference; Package: TO-92; Pins: 3; Temperature Range: -40°C to 85°C |
| 文件： | 总8页 (文件大小：149K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LM185-2.5/
LM285-2.5/LM385-2.5
Micropower Voltage
Reference
U
FEATURES
DESCRIPTIO
■
20µA to 20mA Operating Range
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.
■
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
■
Panel Meters
■
Current Loop Instrumentation
For applications requiring guaranteed temperature drift,
see the LT1034 data sheet.
, LTC and LT are registered trademarks of Linear Technology Corporation.
U
TYPICAL APPLICATIO
Thermocouple Cold Junction Compensator
Reverse Voltage Change
16
I
≈ 50µA
–55°C ≤ T ≤ +125°C
Q
A
V
IN
16k
1M
12
R
SET
LM334
2 MERCURY
CELLS 2.6V
8
4
100k W.W.
ZERO
–
V
2k
LM385-2.5
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 (Note 1)
Reverse Breakdown Current ................................ 30mA
Forward Current .................................................. 10mA
Operating Temperature Range
Storage Temperature Range
LM185-2.5 (OBSOLETE)............ –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 (OBSOLETE)............ –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
NUMBER
ORDER PART
NUMBER
BOTTOM VIEW
BOTTOM VIEW
LM185H-2.5
LM285H-2.5
LM285Z-2.5
LM385Z-2.5
LM385H-2.5
LM385BZ-2.5
H PACKAGE
2-LEAD TO-46 METAL CAN
Z PACKAGE
LM385BH-2.5
(NOTE 3)
(NOTE 3)
3-LEAD TO-92 PLASTIC
TJMAX = 100°C, θJA = 160°C/W
TJMAX = 150°C, θJA = 440°C/W, θJC = 80°C/W
OBSOLETE PACKAGE
Consider the S8 or Z Packages for Alternate Source
ORDER PART
NUMBER
TOP VIEW
NC
NC
1
2
3
4
8
7
6
5
LM285S8-2.5
LM385S8-2.5
LM385BS8-2.5
NC
NC
NC
(DO NOT
USE)
S8 PART MARKING
S8 PACKAGE
8-LEAD PLASTIC SO
2852
3852
3852B
TJMAX = 150°C, θJA = 220°C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
2
LM185-2.5/
LM285-2.5/LM385-2.5
The ● denotes the specifications which apply over the full operating
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at TA = 25°C. (Note 2)
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
Reverse Breakdown Voltage
Z
A
R
LM185-2.5/285-2.5
LM385-2.5
LM385B-2.5 (Note 3)
2.462
2.500 2.538
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 3)
20
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
Reverse Dynamic Impedance
I = 100µA (Note 4)
R
Z
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
Note 3: 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: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All specifications are for T = 25°C unless otherwise noted. For the
A
LM185-2.5 T
= –55°C and T
= 85°C. For LM385-2.5, T
= 125°C. For LM285-2.5, T = –
Note 4: Guaranteed but not tested.
MIN
MAX
MIN
40°C and T
= 0°C and T
= 70°C.
MAX
MAX
MIN
3
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
–55°C TO 125°C
T = 25°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
–55 –35 –15
5
25 45 65 85 105 125
0.01
0.1
1
10
100
REVERSE VOLTAGE (V)
TEMPERATURE (°C)
FORWARD CURRENT (mA)
LM185-2.5 • TPC01
LM185-2.5 • TPC02
LM185-2.5 • TPC03
Reverse Dynamic Impedance
Reverse Dynamic Impedance
Noise Voltage
1000
100
10
10k
1k
1400
1200
f = 25Hz
–55°C TO 125°C
T
R
= 25°C
= 100µA
A
I
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
1M
10
100
1k
FREQUENCY (Hz)
10k
100k
REVERSE CURRENT (mA)
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
IN
V
OUT
RC LOW PASS
5V
0
INPUT
100
100
1k
10k
100k
0
500
TIME (µS)
CUTOFF FREQUENCY (Hz)
LM185-2.5 • TPC07
LM185-2.5 • TPC08
4
LM185-2.5/
LM285-2.5/LM385-2.5
W
W
SCHE ATIC DIAGRA
+
7.5k
Q13
200k
Q12
Q11
Q4
Q3
Q7
20pF
20pF
50k
500k
Q1
600k
Q10
Q2
Q5
300k
Q9
Q6
Q8
100k
500Ω
Q14
60k
500k
–
LM185-2.5 SD01
U
PACKAGE DESCRIPTIO
H Package
2-Lead and 3-Lead TO-46 Metal Can
(Reference LTC DWG # 05-08-1340)
0.209 – 0.219
(5.309 – 5.537)
0.178 – 0.195
(4.521 – 4.953)
0.100
(2.540)
TYP
0.085 – 0.105
(2.159 – 2.667)
0.050
(1.270)
TYP
0.050
(1.270)
TYP
0.500
(12.700)
MIN
PIN 1
REFERENCE
FOR 3-LEAD PACKAGE ONLY
0.028 – 0.048
PLANE
*
0.025
(0.635)
MAX
45°
0.036 – 0.046
(0.914 – 1.168)
(0.711 – 1.219)
0.016 – 0.021**
H02/03(TO-46) 1098
(0.406 – 0.533)
DIA
*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)
OBSOLETE PACKAGE
5
LM185-2.5/
LM285-2.5/LM385-2.5
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
6
LM185-2.5/
LM285-2.5/LM385-2.5
U
PACKAGE DESCRIPTIO
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
0.060 ± 0.010
(1.524 ± 0.254)
Z3 (TO-92) 0401
0.098 +016/–0.04
(2.5 +0.4/–0.1)
2 PLCS
TO-92 TAPE AND REEL
0.140 ± 0.010
(3.556 ± 0.127)
REFER TO TAPE AND REEL SECTION OF
LTC DATA BOOK FOR ADDITIONAL INFORMATION
10° NOM
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.
7
LM185-2.5/
LM285-2.5/LM385-2.5
U
O
TYPICAL APPLICATI S
+
V
9V
+
3.7V ≤ V ≤ 30V
R
LM334
220k
2.7k
2.5V
2.5V
LM385-2.5
LM385-2.5
REFERENCE FROM
A 9V BATTERY
OPERATION OVER A
WIDE SUPPLY RANGE
LM185-2.5 TA03
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1634
Micropower Shunt Voltage Reference
0.05% Initial Accuracy, 10ppm/°C Maximum Tempco
Output Voltage: 1.25V, 2.5V, 4.096V and 5V
185fc LT/CP 0801 1.5K REV C • PRINTED IN USA
Linear Technology Corporation
8
1630 McCarthy Blvd., Milpitas, CA 95035-7417
LINEAR TECHNOLOGY CORPORATION 1992
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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