AMS385-2.5BS [ADMOS]
Battery Powered Systems;
| 型号： | AMS385-2.5BS |
| 厂家： | 
ADVANCED MONOLITHIC SYSTEMS |
| 描述： | Battery Powered Systems 电池 |
| 文件： | 总8页 (文件大小：172K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Advanced
Monolithic
Systems
AMS285-2.5/AMS385-2.5
MICROPOWER VOLTAGE REFERENCE DIODE
RoHS compliant
FEATURES
APPLICATIONS
• ±20 mV (±0.8%) max. initial tolerance (A grade)
• Operating Current 20µA to 20mA
• Low Voltage Reference 2.5V
• Max. 0.6Ω Dynamic Impedance (A grade)
• Low Temperature Coefficient
• Battery Powered Systems
• Instrumentation
• A/D, D/A Converters
• Temperature measurement
• Current sources
• 1.2V Device and Adjustable Device also available
AMS285-1.2 and AMS285 series, respectively
AMS385-1.2 and AMS385 series.
• Notebook/Personal Computer
• Monitors/ VCR/ TV
• Pagers
GENERAL DESCRIPTION
The AMS285-2.5/AMS385-2.5 are two-terminal micropower band-gap voltage reference diodes. They feature a very low
dynamic impedance and good temperature coefficient, operating over a 20µA to 20mA current range. On-chip trimming is
used to provide tight voltage tolerance. Since the AMS285-2.5/AMS385-2.5 is a band-gap reference, uses only transistors and
resistors, low noise and good long term stability result. Careful design of the AMS285-2.5/AMS385-2.5 has made the device
exceptionally 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. The extremely low power drain of the
AMS285-2.5/AMS385-2.5 makes these reference diodes useful for micropower circuitry. These voltage references can be used
to make portable meters, regulators or general purpose analog circuitry with battery life approaching shelf life. Further more,
the wide operating current allows it to replace older references with a tight tolerance part.
The AMS285-2.5 is operational in the full industrial temperature range of -40°C to 85°C while AMS385-2.5 is operating over
a 0°C to 70°C temperature range. The AMS285-2.5/AMS385-2.5 are available in TO-92, SO-8 and SOT-89 packages.
ORDERING INFORMATION:
TOL.
PACKAGE TYPE
OPERATING
TO-92
8 LEAD SOIC
AMS285-2.5AS
AMS285-2.5BS
AMS285-2.5CS
AMS385-2.5AS
AMS385-2.5BS
AMS385-2.5CS
SOT-89
AMS285-2.5AL
AMS285-2.5BL
AMS285-2.5CL
AMS385-2.5AL
AMS385-2.5BL
AMS385-2.5CL
TEMPERATURE RANGE
±20mV AMS285-2.5AN
±38mV AMS285-2.5BN
±75mV AMS285-2.5CN
±20mV AMS385-2.5AN
±38mV AMS385-2.5BN
±75mV AMS385-2.5CN
-40 to 85° C
-40 to 85° C
-40 to 85° C
0 to 70° C
0 to 70° C
0 to 70° C
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723
AMS285-2.5/AMS385-2.5
ABSOLUTE MAXIMUM RATINGS
Reverse Current
Forward Current
30mA
10mA
Storage temperature
Soldering information (25 sec)
-55°C to +150°C
265°C
Operating Temperature Range
AMS285-2.5
AMS385-2.5
-40°C to 85°C
0°C to 70°C
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at IR = 100 µA, and TA = +25°C unless otherwise specified.
AMS285A-2.5
AMS285B-2.5
AMS285C-2.5
Parameter
Conditions
Units
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Reverse Breakdown
Voltage (Note 4)
2.480
2.500
2.520
0.60
2.462
2.500
2.538
2.425
2.500
2.575
V
IR - 100 µA
Reverse Dynamic
Impedance (Note 4)
Reverse Breakdown
Voltage Change with
current (Note 4)
0.2
1
1
Ω
IR - 100 µA, f =20Hz
1.0
10
1.0
10
2.0
20
mV
10µA ≤IR ≤1mA
1mA ≤IR ≤20mA
Min. Operating
Current (Note 4)
12
18
20
13
20
30
13
20
30
µA
µA
Wide Band Noise
(Note 5)
IR - 100 µA,
10Hz ≤ f ≤ 10kHz
120
120
120
µV
ppm/°C
ppm
Temperature Coeff.
(Note 6)
25
50
100
150
Long Term Stability
(Note 5)
20
20
20
TA=25°C±.1°C
T = 1000 Hr
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at IR = 100 µA, and TA = +25°C unless otherwise specified.
AMS385A-2.5
AMS385B-2.5
AMS385C-2.5
Parameter
Conditions
Units
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Reverse Breakdown
Voltage (Note 4)
2.480
2.500
2.520
0.60
2.462
2.500
2.538
2.425
2.500
2.575
V
IR - 100 µA
Reverse Dynamic
Impedance (Note 4)
Reverse Breakdown
Voltage Change with
Current (Note 4)
0.2
1
1
Ω
IR - 100 µA, f =20Hz
1.0
10
2.0
20
2.0
20
mV
10µA ≤IR ≤1mA
1mA ≤IR ≤20mA
Min. Operating
Current (Note 4)
12
18
20
13
20
30
13
20
30
µA
µA
Wide Band Noise
(Note 5)
IR - 100 µA,
10Hz ≤ f ≤ 10kHz
120
120
120
µV
ppm/°C
ppm
Temperature Coeff.
(Note 6)
25
50
100
150
Long Term Stability
(Note 5)
20
20
20
TA=25°C±.1°C
T = 1000 Hr
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723
AMS285-2.5/AMS385-2.5
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the
device is intended to be 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.
Note 2: For elevated temperature operation, Tj max is:
AMS285
AMS385
+125°C
+100°C
Thermal Resistance
TO-92
SO-8
SOT-89
170°C/W (0.125” leads)
165°C/W
160°C/W
ϕ
JA (junction to ambient)
Note 3: Parameters identified with boldface type apply at temperature extremes. All other numbers apply at TA = TJ = 25°C.
Note 4: Guaranteed and 100% production tested.
Note 5: Guaranteed but not 100% production tested. These limits are not used to calculate average outgoing quality levels.
Note 6: The average temperature coefficient is defined as the maximum deviation of reference voltage at all measured temperatures between the operating
TMAX and TMIN, divided by TMAX - TMIN. The measured temperatures are 0°C, 25°C, 70°C and 85°C.
PIN CONNECTIONS
TO-92
Plastic Package (N)
8L SOIC
SO Package (S)
SOT-89
(L)
N/C N/C N/C
+
8
7
6
5
3
2
1
3
2
1
-
+
1
2
3
4
-
N/C
N/C N/C N/C
Bottom View
Top View
Top View
TYPICAL APPLICATIONS
Wide Input
Range Reference
Micropower Reference
from 9V Battery
9V
VIN = 3.7V TO 30V
200k
LM334
2.5V
3.3k
AMS385-2.5
OUT
2.5V
AMS385-2.5
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723
AMS285-2.5/AMS385-2.5
TYPICAL APPLICATIONS (Continued)
0°C - 100°C Thermometer
0°C - 100°C Thermometer
1k
150
M
M
0-100µA
0-50µA
R1
8k
R1
4k
IOUT
IOUT
R2
1k
R2
1k
V+
3V
V+
3V
R
R
LM334
V-
LM334
V-
AMS385-2.5
AMS385-2.5
R3
100
R3
50
R4
R4
220
100
Calibration
Calibration
1. Short AMS385-2.5, adjust R3 for IOUT = temp at 1µA/°K
2. Remove short, adjust R2 for correct reading in °C
1. Short AMS385-2.5, adjust R3 for IOUT = temp at 1.8µA/°K
2. Remove short, adjust R2 for correct reading in °F
Micropower* 5V Regulator
Micropower* 10V Reference
IQ
IQ
VIN
≥
5.2V
VIN = 15V
V+
47k
R
500k
2
LM334
2N2905
7
+
-
V-
2.2k
6
LM4250C
10V
3
+
-
8
7
3
VO = 5V
IL 100mA
6
4
1.5M
LM4250C
150pF
≤
22M
2
1N457
1N457
8
4
100k
100k
150pF
+
4.7µF
TANTALUM
500k
AMS385-2.5
10M
2k
AMS385-2.5
*IQ ≅ 20µA standby current
*IQ ≅ 40µA
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723
AMS285-2.5/AMS385-2.5
TYPICAL APPLICATIONS (Continued)
Micropower Thermocouple Cold Junction Compensator
V+
LM334
2k
1%
18k
1M
1%
R
Adjustment Procedure
V-
TC ADJ
500
ZERO ADJ
100k
+
3V
LITHIUM
1. Adjust TC ADJ pot until voltage across R1 equals Kelvin temperature
multiplied by the thermocouple Seebeck coefficient.
AMS385-2.5
2. Adjust ZERO ADJ pot until voltage across R2 equals the thermocouple
Seebeck coefficient multiplied by 273.2.
R2
R1
Thermocouple
Type
Seebeck
Coefficient
(mV/ °C)
R1
(Ω) (Ω) Across R1
@ 25°C (mV)
R2
Voltage
Voltage
Across R2
(mV)
+
-
+
J
52.3
42.8
40.8
6.4
523 1.24k
432 1k
412 953Ω 12.17
63.4 150Ω 1.908
15.60
12.77
14.32
11.78
11.17
1.766
THERMOCOUPLE
METER
-
T
K
S
COLD JUNCTION
ISO THERMAL
WITH LM334
Typical supply current 50µA
Precision 1µA to 1mA Current Sources
AMS385-2.5
30V
AMS385-2.5
C1
150pF
C1
150pF
R1
68k
R1
2
3
-
68k
7
2
3
-
6
7
LM312
6
LM312
4
+
4
+
IOUT*
R2
IOUT*
1.5V TO 27V
R2
-1.5V TO -27V
-30V
*IOUT =2.5V/R2
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723
AMS285-2.5/AMS385-2.5
TYPICAL PERFORMANCE CHARACTERISTICS
Reverse Characteristics
Reverse Characteristics
Forward Characteristics
100
10
16
12
8
1.6
TA =125° C
1.2
TA =-55° C
TA =125° C
TA =25° C
0.8
TA =-55° C
4
0
TA =25° C
1
TA =-55° C
0.4
0
TA =25° C
TA =125° C
0.1
-4
0
0.5
2.0
0.01
0.1
1
10
100
1.0
1.5
3.0
0.01
0.1
1
10
100
2.5
REVERSE VOLTAGE (V)
FORWARD CURRENT (mA)
REVERSE CURRENT (mA)
Reverse Dynamic Impedance
Temperature Drift
Reverse Dynamic Impedance
10k
1k
2.530
1000
100
10
TA =25° C
IR= 100µA
2.520
2.510
2.500
2.490
IR= 100µA
TA =125° C
TA =-55° C
100
10
2.480
1
2.470
2.460
2.450
1
TA =25° C
0.1
0.1
-35 -15
-55
10
5
65 85 105
100
10k
100k
0.01
0.1
1
10
100
25 45
125
1k
1M
FREQUENCY (Hz)
REVERSE CURRENT (mA)
TEMPERATURE (° C)
Noise Voltage
Filtered Output Noise
Response Time
120
100
80
1400
3.0
2.0
SINGLE POLE LOW PASS
IR= 100µA
IR= 100µA
OUTPUT
INPUT
1200
1000
800
100µA
OUTPUT
100k
OUTPUT
1.0
0
60
AMS385-2.5
600
~
~
~
~
40
20
0
400
10
0
INPUT
SHARP CUTOFF
FILTER
200
0
100
1k
10k
100k
10
100
1k
10k
100k
0
200
TIME (
400
s)
600
CUTOFF FREQUENCY (Hz)
FREQUENCY (Hz)
µ
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723
AMS285-2.5/AMS385-2.5
PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.
3 LEAD TO-92 PLASTIC PACKAGE (N)
0.180±0.005
(4.572±0.127)
0.060±0.005
(1.524±0.127)
DIA
0.060±0.010
(1.524±0.254)
0.90
(2.286)
NOM
0.180±0.005
(4.572±0.127)
0.140±0.010
(3.556±0.127)
10°
NOM
5° NOM
0.500
(12.70)
MIN
UNCONTROLLED
LEAD DIMENSIONS
0.050
(1.270)
MAX
0.015±0.002
N (TO-92 ) AMS DRW# 042391
(0.381±0.051)
0.016±0.003
(0.406±0.076)
0.050±0.005
(1.270±0.127)
8 LEAD SOIC PLASTIC PACKAGE (S)
0.189-0.197*
(4.801-5.004)
8
7
6
5
0.228-0.244
(5.791-6.197)
0.150-0.157**
(3.810-3.988)
1
2
3
4
0.010-0.020
(0.254-0.508)
x 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
0.014-0.019
(0.355-0.483)
0.050
(1.270)
TYP
0.016-0.050
(0.406-1.270)
S (SO-8 ) AMS DRW# 042293
*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
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723
AMS285-2.5/AMS385-2.5
PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted (Continued).
SOT-89 PLASTIC PACKAGE (L)
0.173-0.181
(4.40-4.60)
0.055-0.063
(1.40-1.60)
0.014-0.017
(0.35-0.44)
0.064-0.072
(1.62-1.83)
0.155-0.167
(3.94-4.25)
0.084-0.090
(2.13-2.29)
0.090-0.102
(2.29-2.60)
0.035-0.047
(0.89-1.20)
0.059
(1.50)
BSC
0.014-0.019
(0.36-0.48)
0.017-0.022
(0.44-0.56)
L (SOT-89 ) AMS DRW# 042392
0.118
(3.00)
BSC
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723
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