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| Advanced Monolithic Systems FEATURES * 12 mV (0.5%) max. initial tolerance (A grade) * Operating Current 20A to 20mA * Low Voltage Reference 2.50V * Max. 0.5 Dynamic Impedance (A grade) * Low Temperature Coefficient * SOT-23 Package Available * Low cost AMS3100-2.5 MICROPOWER VOLTAGE REFERENCE APPLICATIONS * Battery Powered Systems * Instrumentation * A/D, D/A Converters * Temperature measurement * Current sources * Notebook/Personal Computer * Monitors/ VCR/ TV * Pagers GENERAL DESCRIPTION The AMS3100-2.5 are two-terminal micropower band-gap voltage reference that feature a very low dynamic impedance and good temperature coefficient, operating over a 20A to 20mA current range. AMS3100-2.5 is trimmed at wafer test level to optimize the temperature coefficient and tight output voltage tolerance. The advanced process technology used, makes the AMS3100-2.5 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, 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. Pin to pin compatible with other standard industry references, the AMS3100-2.5 offers the advantage of long term stability at low cost. The AMS3100-2.5 is operating over a -40C to 85C temperature range and is available in the space saving SOT-23 package. ORDERING INFORMATION: TOL. PACKAGE TYPE OPERATING TEMPERATURE RANGE -40C to 85C -40C to 85C -40C to 85C SOT-23 12mV AMS3100-2.5AM 25mV AMS3100-2.5BM 50mV AMS3100-2.5CM PIN CONNECTIONS 3L SOT-23 (M) 3* 1 + 2 - *This pin must be left floating or connected to pin 2 Top View Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS3100-2.5 ABSOLUTE MAXIMUM RATINGS Reverse Current Forward Current Operating Temperature Range Storage temperature 30mA 10mA -40C to 85C -55C to +150C Lead Temperature Vapor phase (60 sec) Infrared (15 sec.) Thermal Resistance (JA) 215C 220C 410C/W ELECTRICAL CHARACTERISTICS Electrical Characteristics at IR = 100 A, and TA = +25C unless otherwise specified. Parameter Reverse Breakdown Voltage (Note 3) Reverse Dynamic Impedance (Note 3) Reverse Breakdown Voltage Change with current (Note 3) Min. Operating Current (Note 3) Wide Band Noise (Note 4) Temperature Coeff. (Note 5) Long Term Stability (Note 4) 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 AMS3100A-2.5 Typ Max 2.500 0.2 1.0 10 12 20 25 2.512 0.60 Min AMS3100B-2.5 Typ Max 2.500 1 1.0 10 13 20 30 2.525 AMS3100C-2.5 Min Typ Max 2.450 2.500 1 2.0 20 13 20 30 2.550 Units V mV 2.488 2.475 A A V 120 120 120 25 50 100 150 ppm/C 20 20 20 ppm 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: Parameters identified with boldface type apply at temperature extremes. All other numbers apply at TA = TJ = 25C. Note 3: Guaranteed and 100% production tested Note 4:. Guaranteed but not 100% production tested. These limits are not used to calculate average outgoing quality levels. Note 5: 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 -40C, 25C and 85C. TYPICAL APPLICATIONS Wide Input Range Reference Micropower Reference from 9V Battery 9V V IN = 3.7V TO 30V 200k LM334 2.5V 3.3k AMS3100-2.5 OUT 2.5V AMS3100-2.5 Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS3100-2.5 TYPICAL APPLICATIONS (Continued) 0C - 100C Thermometer 0C - 100C Thermometer 1k 150 0-100A M IOUT R1 8k R2 1k R AMS3100-2.5 R3 100 R4 220 0-50A M IOUT R1 4k R2 1k R AMS3100-2.5 R3 50 R4 100 V+ LM334 V- 3V V+ LM334 V - 3V Calibration 1. Short AMS3100-2.5, adjust R3 for IOUT = temp at 1A/K 2. Remove short, adjust R2 for correct reading in C Calibration 1. Short AMS3100-2.5, 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 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 AMS3100-2.5 10M AMS3100-2.5 2k 100k *IQ 40A *IQ 20A standby current Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS3100-2.5 TYPICAL APPLICATIONS (Continued) Micropower Thermocouple Cold Junction Compensator V+ LM334 2k 1% 18k 1M 1% V3V + LITHIUM ZERO ADJ 100k R Adjustment Procedure TC ADJ 500 AMS3100-2.5 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 AMS3100-2.5 30V AMS3100-2.5 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 AMS3100-2.5 TYPICAL PERFORMANCE CHARACTERISTICS Reverse Characteristics OUTPUT VOLTAGE CHANGE (mV) 16 12 8 4 0 -4 0.01 0.1 1 10 100 REVERSE CURRENT (mA) T A =-40 C Reverse Characteristics 100 REVERSE CURRENT (A) 1.6 FORWARD VOLTAGE (V) Forward Characteristics T A =85 C 1.2 T A =-40 C 10 T A =85 C T A =-40 C T A =25 C 0.8 T A =25 C 1 T A =25 C 0.4 T A =85 C 0.1 0 0.5 1.0 1.5 2.0 2.5 REVERSE VOLTAGE (V) Temperature Drift 2.530 REFERENCE VOLTAGE (V) DYNAMIC IMPEDANCE () 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 I R= 100 A SINGLE POLE LOW PASS I R= 100 A IR= 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 IR= 100 A 100 T A =85 C T A =-40 C 10 1 T A =25 C 1 0.1 10 0.1 0.01 0.1 1 10 100 REVERSE CURRENT (mA) 100 10k 100k 1k FREQUENCY (Hz) 1M Filtered Output Noise 120 INTEGRATED NOISE ( V) 100 80 60 AMS3100-2.5 OUTPUT Response Time 3.0 OUTPUT 1200 VOLTAGE SWING (V) 2.0 1.0 0 10 0 10 100 1k 10k FREQUENCY (Hz) 100k 0 NOISE (nV/Hz) 100A INPUT 100k OUTPUT 1000 800 600 400 200 0 40 20 0 100 SHARP CUTOFF FILTER ~ ~ 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 AMS3100-2.5 PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted. 3 LEAD SOT-23 PLASTIC PACKAGE (M) 0.110-0.120 (2.794-3.048) 0.015-0.017 (0.381-0.432) 0.083-0.098 (2.108-2.489) 0.047-0.055 (1.194-1.397) 0.035-0.040 (0.889-1.016) 0.018-0.024 (0.457-0.610) 10 NOM 0.035-0.041 (0.089-1.041) 0.0034-0.0050 (0.086-0.127) 0.0005-0.0040 (0.013-0.102) 0.070-0.080 (1.778-2.032) 10 NOM 0.018-0.024 (0.457-0.610) (SOT-23 ) AMS DRW# 051991 Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 |
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