LM385DM-1.2T [MICROSEMI]
Two Terminal Voltage Reference, 1 Output, 1.235V, PDSO8, PLASTIC, SOIC-8;
| 型号： | LM385DM-1.2T |
| 厂家： | 
Microsemi |
| 描述： | Two Terminal Voltage Reference, 1 Output, 1.235V, PDSO8, PLASTIC, SOIC-8 光电二极管 |
| 文件： | 总7页 (文件大小：154K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LIN DOC #: 385
LM385/385B
1.2 & 2.5V MICROPOWER
V
OLTAGE
R
EFERENCE
T H E I N F I N I T E P O W E R O F I N N O V A T I O N
P R O D U C T I O N D A T A S H E E T
DESCRIPTION
KEY FEATURES
■ GUARANTEED 1% INITIAL ACCURACY
The LM385/385B Micropower Voltage
References are two terminal bandgap
reference diodes designed and optimized
for accurate low power operation in
portable and other power sensitive
systems. Operating currents are
guaranteed from as low as 15µA up to
20mA for the LM385/385B-1.2, and 20µA
up to 20mA for the LM385/385B-2.5,
giving designers a great deal of flexibility
in optimizing power consumption, noise
andultimateapplicationperformance. As
an added feature, the references output
impedanceisextraordinarilylowoverthe
entire operating range of quiescent
currents. This enables an extremely wide
dynamic load range with little effect on
the overall reference accuracy.
The LM385 family is available in fixed
(LM385B-1.2)
■ GUARANTEED 2.5% INITIAL ACCURACY
(LM385-1.2)
■ GUARANTEED 1.5% INITIAL ACCURACY
(LM385B-2.5)
■ GUARANTEED 3% INITIAL ACCURACY
(LM385-2.5)
p GUARANTEED 20µA OPERATING CURRENT
p LOW TEMPERATURE COEFFICIENT
1.2V and 2.5V reference values. Process
and circuit design optimization provide
for high accuracy with initial tolerance
values of 1% for the LM385B-1.2, 2% for
the LM385-1.2, 1.5% for the LM385B-2.5,
and
3%
for
the
LM385-2.5.
Complementing their initial accuracy, the
bandgap reference is temperature
compensated to deliver 20ppm
performance over the 0° to 70°C
operating temperature range.
The LM385 family from Linfinity is a
pin-for-pin replacement for the LM385/
385B family of voltage references.
p OPERATING CURRENT OF 20µA TO 20mA
p VERY LOW DYNAMIC IMPEDANCE . . . 1Ω
APPLICATIONS
■ PORTABLE METER REFERENCES
p PORTABLE TEST INSTRUMENTS
p BATTERY OPERATED SYSTEMS
p CURRENT LOOP INSTRUMENTATION
PRODUCT HIGHLIGHT
MICROPOWER REFERENCE FROM
1.2V REFERENCE
9V BATTERY
9V
5V
200k
38k
2.5V
1.2V
LM385-2.5V
LM385-1.2V
PACKAGE ORDER INFORMATION
Reference
Voltage
Initial
Tolerance
Plastic SOIC
8-pin
Plastic TO-92
LP
3-pin
TA (°C)
DM
±±30V
±120V
±750V
±±80V
LM±85DM-1.2
LM±85BDM-1.2
LM±85DM-2.5
LM±85BDM-2.5
LM±85LP-1.2
LM±85BLP-1.2
LM±85LP-2.5
LM±85BLP-2.5
1.2V
3 to 73
2.5V
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. LM385DM-2.5T)
F O R F U R T H E R I N F O R M AT I O N C A L L ( 7 1 4 ) 8 9 8 - 8 1 2 1
Copyright © 1996
Rev. 1.2 7/96
1
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
LM385/385B
1.2 & 2.5V MICROPOWER
V
OLTAGE
R
EFERENCE
P R O D U C T I O N D A T A S H E E T
ABSOLUTE MAXIMUM RATINGS (Note 1)
PACKAGE PIN OUTS
Reverse Breakdown Current .................................................................................... 30mA
Forward Current ........................................................................................................ 10mA
Operating Temperature Range
LM385........................................................................................................... 0°C to 70°C
Storage Temperature Range ...................................................................... -65°C to 150°C
Lead Temperature (soldering, 10 seconds) ............................................................. 300°C
1.
2.
3 .
4.
8.
7.
6.
5.
N/C
N/C
N/C
CATHODE
N/C
CATHODE
N/C
ANODE
DM PACKAGE
(Top View)
Note 1. Values beyond which damage may occur. All voltages are specified with respect to
ground, and all currents are positive into the specified terminal
1. ANODE
THERMAL DATA
2. CATHODE
3. N/C
DM PACKAGE:
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
LP PACKAGE:
165ºC/W
165ºC/W
LP PACKAGE
(Top View)
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
The θJA numbers are guidelines for the thermal performance of the device/pc-board system.
All of the above assume no ambient airflow.
Copyright © 1996
Rev. 1.2 7/96
2
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
LM385/385B
1.2 & 2.5V MICROPOWER
V
OLTAGE
R
EFERENCE
P R O D U C T I O N D A T A S H E E T
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply to TA = 25ºC. Typ number represents TA = 25ºC value.)
LM385/385B-1.2
LM385/385B-1.2
Units
Parameter
Symbol
Test Conditions
Min. Typ.
Max.
Reverse Breakdown Voltage
LM385
VZ
I
I
MIN ≤ IR ≤ IMAX
MIN ≤ IR ≤ IMAX
1.205 1.235 1.260
1.223 1.235 1.247
20
V
V
LM385B
ppm/°C
Average Temperature Coefficient
∆VZ
∆Temp
IMIN
IR = 100µA
8
15
1.5
20
µA
mV
Minimum Operating Current
Reverse Breakdown Voltage Chang
with Current
e
∆VZ
I
MIN ≤ IR ≤ 1mA
mV
∆IR
1mA ≤ IR ≤ 20mA
1
Ω
Reverse Dynamic Impedance
Wide Band Noise (RMS)
Long Term Stability
rz
en
IR = 100µA
IR = 100µA, 10Hz ≤ f ≤ 10kHz
IR = 100µA, TA = 25°C 0.1°C
60
20
µV
ppm/kHr
∆VZ
∆Time
LM385/385B-2.5
Parameter
LM385/385B-2.5
Symbol
Test Conditions
Units
Min. Typ.
Max.
Reverse Breakdown Voltage
LM385
LM385B
VZ
I
I
MIN ≤ IR ≤ IMAX
MIN ≤ IR ≤ IMAX
2.425 2.500 2.575
2.462 2.500 2.538
20
V
V
Average Temperature Coefficient
∆VZ
∆Temp
IMIN
IR = 100µA
ppm/°C
Minimum Operating Current
Reverse Breakdown Voltage Chang
with Current
13
20
2
µA
mV
mV
e
∆VZ
IMIN ≤ IR ≤ 1mA
20
∆IR
1mA ≤ IR ≤ 20mA
1
120
20
Ω
Reverse Dynamic Impedance
Wide Band Noise (RMS)
Long Term Stability
rz
IR = 100µA, f = 20Hz
µV
en
∆VZ
∆Time
IR = 100µA, 10Hz ≤ f ≤ 10kHz
IR = 100µA, TA = 25°C 0.1°C
ppm/kHr
GRAPH / CURVE INDEX
Characteristic Curves
LM385/385B-1.2
Characteristic Curves
LM385/385B-2.5
FIGURE #
FIGURE #
1. RESPONSE TIME
8. RESPONSE TIME
2. REVERSE CHARACTERISTICS
3. FORWARD CHARACTERISTICS
4. TEMPERATURE DRIFT
9. REVERSE CHARACTERISTICS
10. FORWARD CHARACTERISTICS
11. TEMPERATURE DRIFT
5. REVERSE VOLTAGE CHANGE
6. REVERSE DYNAMIC IMPEDANCE
7. NOISE VOLTAGE
12. REVERSE DYNAMIC IMPEDANCE
13. NOISE VOLTAGE
Copyright © 1996
Rev. 1.2 7/96
3
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
LM385/385B
1.2 & 2.5V MICROPOWER
V
OLTAGE
R
EFERENCE
P R O D U C T I O N D A T A S H E E T
CHARACTERISTIC CURVES — LM385/385B-1.2V
FIGURE 1. — RESPONSE TIME
FIGURE 2. — REVERSE CHARACTERISTICS
100
1.5V
1.0V
0.5V
0
TA = 0 to 70°C
10
36k
VIN
VOUT
1
5V
0
0.1
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0
50
100
500
550
Time - (µs)
Reverse Voltage - (V)
FIGURE 3. — FORWARD CHARACTERISTICS
FIGURE 4. — TEMPERATURE DRIFT
1.2
1.242
IR = 100µA
1.24
TA = 25°C
1.238
1.236
1.234
1.232
1.23
0.8
0.4
1.228
1.226
0
0.01
0.1
1
10
100
0
10
20
30
40
50
60
70
Forward Current - (mA)
Temperature - (°C)
Copyright © 1996
Rev. 1.2 7/96
4
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
LM385/385B
1.2 & 2.5V MICROPOWER
V
OLTAGE
R
EFERENCE
P R O D U C T I O N D A T A S H E E T
CHARACTERISTIC CURVES — LM385/385B-1.2V
FIGURE 5. — REVERSE VOLTAGE CHANGE
FIGURE 6. — REVERSE DYNAMIC IMPEDANCE
16
14
12
10
8
1000
100
10
TA = 25°C
IR = 100µA
TA = 0 to 70°C
6
4
2
1
0
-2
-4
0.01
0.1
0.1
1
10
100
10
100
1k
10k
100k
Reverse Current - (mA)
(f) Frequency - (Hz)
FIGURE 7. — NOISE VOLTAGE
800
700
600
500
400
300
200
IR = 100µA
TA = 25°C
100
10
100
1k
10k
100k
(f) Frequency - (Hz)
Copyright © 1996
Rev. 1.2 7/96
5
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
LM385/385B
1.2 & 2.5V MICROPOWER
V
OLTAGE
R
EFERENCE
P R O D U C T I O N D A T A S H E E T
CHARACTERISTIC CURVES — LM385/385B-2.5V
FIGURE 8. — RESPONSE TIME
FIGURE 9. — REVERSE CHARACTERISTICS
100
10
1
TA = 25°C
4.0V
TA = 25°C
2.0V
0
24K
VIN
VOUT
5
0
0.1
0
1.0
2.0
3.0
4.0
5.0
Time - (100µs/Div.)
Reverse Voltage - (V)
FIGURE 10. — FORWARD CHARACTERISTICS
FIGURE 11. — TEMPERATURE DRIFT
1.0
2.52
2.515
2.51
TA = 25°C
0.8
2.505
2.5
0.6
0.4
0.2
0
2.495
2.49
2.485
2.48
-40
20
0
20
40
60
80
100
0.001
0.01
0.1
1
10
100
Temperature - (°C)
Forward Current - (mA)
Copyright © 1996
Rev. 1.2 7/96
6
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
LM385/385B
1.2 & 2.5V MICROPOWER
V
OLTAGE
R
EFERENCE
P R O D U C T I O N D A T A S H E E T
CHARACTERISTIC CURVES — LM385/385B-2.5V
FIGURE 12. — REVERSE DYNAMIC IMPEDANCE
FIGURE 13. — NOISE VOLTAGE
100
TA = 25°C
IR = 100µA
1800
1500
10
1200
900
1
600
IR = 100µA
TA = 25°C
300
0.1
10
100
1k
10k
100k
10
100
1k
10k
100k
(f) Frequency - (Hz)
(f) Frequency - (Hz)
Copyright © 1996
Rev. 1.2 7/96
7
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