 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| Advanced Monolithic Systems FEATURES * 20 mV (0.8%) max. initial tolerance (A grade) * Operating Current 20A to 20mA * Low Voltage Reference 2.5V * Max. 0.6 Dynamic Impedance (A grade) * Low Temperature Coefficient * 1.2V Device and Adjustable Device also available AMS285-1.2 and AMS285 series, respectively AMS385-1.2 and AMS385 series. AMS285-2.5/AMS385-2.5 MICROPOWER VOLTAGE REFERENCE DIODE APPLICATIONS * Battery Powered Systems * Instrumentation * A/D, D/A Converters * Temperature measurement * Current sources * 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 20A 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 -40C to 85C while AMS385-2.5 is operating over a 0C to 70C temperature range. The AMS285-2.5/AMS385-2.5 are available in TO-92, SO-8 and SOT-89 packages. ORDERING INFORMATION: TOL. 20mV 38mV 75mV 20mV 38mV 75mV TO-92 AMS285-2.5AN AMS285-2.5BN AMS285-2.5CN AMS385-2.5AN AMS385-2.5BN AMS385-2.5CN PACKAGE TYPE 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 OPERATING TEMPERATURE RANGE -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. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS285-2.5/AMS385-2.5 ABSOLUTE MAXIMUM RATINGS Reverse Current Forward Current Operating Temperature Range AMS285-2.5 AMS385-2.5 30mA 10mA -40C to 85C 0C to 70C Storage temperature Soldering information TO-92 package: 10 sec. SOIC package: Vapor phase (60 sec) Infrared (15 sec.) SOT-89 package: 10 sec. -55C to +150C 260C 215C 220C 265C ELECTRICAL CHARACTERISTICS Electrical Characteristics at IR = 100 A, and TA = +25C unless otherwise specified. Parameter Reverse Breakdown Voltage (Note 4) Reverse Dynamic Impedance (Note 4) Reverse Breakdown Voltage Change with current (Note 4) Min. Operating Current (Note 4) Wide Band Noise (Note 5) Temperature Coeff. (Note 6) Long Term Stability (Note 5) TA=25C.1C T = 1000 Hr IR - 100 A, 10Hz f 10kHz Conditions IR - 100 A IR - 100 A, f =20Hz 10A IR 1mA 1mA IR 20mA Min AMS285A-2.5 Typ Max 2.500 0.2 1.0 10 12 18 20 2.520 0.60 Min 2.462 AMS285B-2.5 Typ Max 2.500 1 1.0 10 13 20 30 2.538 Min AMS285C-2.5 Typ Max 2.500 1 2.0 20 13 20 30 2.575 Units V mV 2.480 2.425 A A V 120 120 120 25 50 100 150 ppm/C 20 20 20 ppm ELECTRICAL CHARACTERISTICS Electrical Characteristics at IR = 100 A, and TA = +25C unless otherwise specified. Parameter Reverse Breakdown Voltage (Note 4) Reverse Dynamic Impedance (Note 4) Reverse Breakdown Voltage Change with Current (Note 4) Min. Operating Current (Note 4) Wide Band Noise (Note 5) Temperature Coeff. (Note 6) Long Term Stability (Note 5) TA=25C.1C T = 1000 Hr IR - 100 A, 10Hz f 10kHz Conditions IR - 100 A IR - 100 A, f =20Hz 10A IR 1mA 1mA IR 20mA Min AMS385A-2.5 Typ Max 2.500 0.2 1.0 10 12 18 20 2.520 0.60 Min AMS385B-2.5 Typ Max 2.500 1 2.0 20 13 20 30 2.538 Min AMS385C-2.5 Typ Max 2.500 1 2.0 20 13 20 30 2.575 Units V mV 2.480 2.462 2.425 A A V 120 120 120 25 50 100 150 ppm/C 20 20 20 ppm Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 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 +125C +100C Thermal Resistance JA (junction to ambient) TO-92 170C/W (0.125" leads) SO-8 165C/W SOT-89 160C/W Note 3: Parameters identified with boldface type apply at temperature extremes. All other numbers apply at TA = TJ = 25C. 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 0C, 25C, 70C and 85C. PIN CONNECTIONS TO-92 Plastic Package (N) 8L SOIC SO Package (S) + 8 N/C N/C N/C 7 6 5 SOT-89 (L) 3 2 1 3 1 2 3 N/C N/C N/C 4 N/C 2 + 1 - Bottom View Top View Top View TYPICAL APPLICATIONS Wide Input Range Reference Micropower Reference from 9V Battery VIN = 3.7V TO 30V 9V 200k LM334 2.5V 3.3k AMS385-2.5 OUT 2.5V AMS385-2.5 Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS285-2.5/AMS385-2.5 TYPICAL APPLICATIONS (Continued) 0C - 100C Thermometer 0C - 100C Thermometer 1k 150 0-100A M IOUT R1 8k R2 1k R AMS385-2.5 R3 100 R4 220 0-50A IOUT M R1 4k R2 1k R AMS385-2.5 R3 50 R4 100 V+ LM334 V- 3V V+ LM334 V- 3V Calibration 1. Short AMS385-2.5, adjust R3 for IOUT = temp at 1A/K 2. Remove short, adjust R2 for correct reading in C Calibration 1. Short AMS385-2.5, adjust R3 for IOUT = temp at 1.8A/K 2. Remove short, adjust R2 for correct reading in F Micropower* 5V Regulator IQ V+ LM334 VR 2.2k 3 + 7 LM4250C 2 4 6 VO = 5V IL 100mA 150pF 100k + 4.7F TANTALUM AMS385-2.5 10M AMS385-2.5 2k 100k 47k 2N2905 VIN 5.2V Micropower* 10V Reference IQ VIN = 15V 500k 2 + 7 LM4250C 3 8 4 22M 150pF 1.5M 6 10V 8 1N457 1N457 500k *IQ 40A *IQ 20A standby current Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS285-2.5/AMS385-2.5 TYPICAL APPLICATIONS (Continued) Micropower Thermocouple Cold Junction Compensator V+ LM334 2k 1% 18k 1M 1% V- R Adjustment Procedure TC ADJ 500 3V + LITHIUM AMS385-2.5 ZERO ADJ 100k 1. Adjust TC ADJ pot until voltage across R1 equals Kelvin temperature multiplied by the thermocouple Seebeck coefficient. 2. Adjust ZERO ADJ pot until voltage across R2 equals the thermocouple Seebeck coefficient multiplied by 273.2. Thermocouple Type Seebeck Coefficient (mV/ C) 52.3 42.8 40.8 6.4 R1 ( ) R2 Voltage Voltage ( ) Across R1 Across R2 @ 25C (mV) (mV) 1.24k 1k 953 150 15.60 12.77 12.17 1.908 14.32 11.78 11.17 1.766 R2 R1 + THERMOCOUPLE + COLD JUNCTION ISO THERMAL WITH LM334 METER J T K S 523 432 412 63.4 Typical supply current 50A Precision 1 A to 1mA Current Sources AMS385-2.5 AMS385-2.5 30V C1 150pF R1 68k 2 LM312 3 IOUT* -1.5V TO -27V -30V + 4 IOUT* R2 1.5V TO 27V 7 6 3 + C1 150pF 2 LM312 4 7 6 R1 68k R2 *IOUT =2.5V/R2 Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS285-2.5/AMS385-2.5 TYPICAL PERFORMANCE CHARACTERISTICS Reverse Characteristics OUTPUT VOLTAGE CHANGE (mV) 16 12 8 4 0 -4 0.01 0.1 1 10 REVERSE CURRENT (mA) 100 TA =-55 C Reverse Characteristics 100 REVERSE CURRENT (A) 1.6 FORWARD VOLTAGE (V) Forward Characteristics TA =125 C 1.2 TA =-55 C 10 TA =25 C TA =125 C TA =-55 C 0.8 T A =25 C 1 TA =25 C 0.4 TA =125 C 0.1 0 0.5 1.0 1.5 2.0 2.5 REVERSE VOLTAGE (V) Temperature Drift 2.530 DYNAMIC IMPEDANCE () REFERENCE VOLTAGE (V) 2.520 2.510 2.500 2.490 2.480 2.470 2.460 2.450 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE ( C) Noise Voltage 1400 IR= 100 A SINGLE POLE LOW PASS IR= 100 A I R= 100 A 0 3.0 0.01 0.1 1 10 100 FORWARD CURRENT (mA) Reverse Dynamic Impedance 1000 DYNAMIC IMPEDANCE () Reverse Dynamic Impedance 10k 1k 100 10 T A =25 C I R= 100 A 100 TA =125 C 10 TA =-55 C 1 TA =25 C 1 0.1 0.1 0.01 0.1 1 10 REVERSE CURRENT (mA) 100 10 100 10k 100k 1k FREQUENCY (Hz) 1M Filtered Output Noise 120 INTEGRATED NOISE (V) 100 80 60 40 20 0 100 SHARP CUTOFF FILTER OUTPUT Response Time 3.0 OUTPUT 1200 NOISE (nV/Hz) 100A 1000 800 600 400 200 0 10 100 1k 10k FREQUENCY (Hz) 100k VOLTAGE SWING (V) 2.0 1.0 0 10 0 0 INPUT 100k OUTPUT AMS385-2.5 ~ ~ INPUT ~ ~ 1k 10k 100k CUTOFF FREQUENCY (Hz) 200 400 TIME (s) 600 Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS285-2.5/AMS385-2.5 PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted. 3 LEAD TO-92 PLASTIC PACKAGE (N) 0.0600.005 (1.5240.127) DIA 0.1800.005 (4.5720.127) 0.0600.010 (1.5240.254) 0.1400.010 (3.5560.127) 0.1800.005 (4.5720.127) 0.90 (2.286) NOM 5 NOM 0.500 (12.70) MIN 10 NOM 0.050 (1.270) MAX UNCONTROLLED LEAD DIMENSIONS 0.0500.005 (1.2700.127) 0.0160.003 (0.4060.076) 0.0150.002 (0.3810.051) N (TO-92 ) AMS DRW# 042391 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 0.053-0.069 (1.346-1.752) 0.004-0.010 (0.101-0.254) 0.008-0.010 (0.203-0.254) 0.010-0.020 x 45 (0.254-0.508) 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. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 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) 0.064-0.072 (1.62-1.83) 0.055-0.063 (1.40-1.60) 0.014-0.017 (0.35-0.44) 0.155-0.167 (3.94-4.25) 0.090-0.102 (2.29-2.60) 0.084-0.090 (2.13-2.29) 0.035-0.047 (0.89-1.20) 0.059 (1.50) BSC 0.118 (3.00) BSC 0.014-0.019 (0.36-0.48) 0.017-0.022 (0.44-0.56) L (SOT-89 ) AMS DRW# 042392 Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 |
Price & Availability of AMS385-25
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |