Advanced Monolithic Systems AMS3100-1.2 MICROPOWER VOLTAGE REFERENCE FEATURES APPLICATIONS • ±6 mV (±0.5%) max. initial tolerance (A grade) • Operating Current 10µ µ A to 20mA • Low Voltage Reference 1.240 • Max. 0.5Ω Ω Dynamic Impedance (A grade) • Low Temperature Coefficient • SOT-23 Package Available • Low cost • Battery Powered Systems • Instrumentation • A/D, D/A Converters • Temperature measurement • Current sources • Notebook/Personal Computer • Monitors/ VCR/ TV • Pagers GENERAL DESCRIPTION The AMS3100-1.2 are two-terminal micropower band-gap voltage reference that feature a very low dynamic impedance and good temperature coefficient, operating over a 10µA to 20mA current range. AMS3100-1.2 is trimmed at wafer test level to optimize the temperature coefficient and tight output voltage tolerance. The advanced process technology used, makes the AMS3100-1.2 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 AMS3100-1.2 offers the advantage of long term stability at low cost. The AMS3100-1.2 is operating over a -40°C to 85°C temperature range and is available in the space saving SOT-23 package. ORDERING INFORMATION: TOL. PACKAGE TYPE SOT-23 ±6mV AMS3100-1.2AM ±12mV AMS3100-1.2BM ±25mV AMS3100-1.2CM OPERATING TEMPERATURE RANGE -40°C to 85°C -40°C to 85°C -40°C to 85°C 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 AMS3100-1.2 ABSOLUTE MAXIMUM RATINGS (Note 1) Reverse Current Forward Current Operating Temperature Range Storage temperature 30mA 10mA -40°C to 85°C -55°C to +150°C Lead Temperature Vapor phase (60 sec) Infrared (15 sec.) Thermal Resistance (θJA) 215°C 220°C 410°C/W ELECTRICAL CHARACTERISTICS Electrical Characteristics at IR = 100 µA, and TA = +25°C unless otherwise specified. Parameter Conditions Reverse Breakdown Voltage (Note 3) Min AMS3100A-1.2 Typ Max 1.229 1.235 1.241 IR - 100 µA, f =20Hz 0.2 0.50 10µA ≤IR ≤1mA 1mA ≤IR ≤20mA 1.0 5 Min. Operating Current (Note 3) 1.223 1.235 1.249 AMS3100C-1.2 Min Typ Max 1.210 1.235 IR - 100 µA, 10Hz ≤ f ≤ 10kHz Temperature Coeff. (Note 5) 10 15 60 1.260 Units V 5 50 20 40 Ω 0.5 10 15 5 60 25 TA=25°C±.1°C T = 1000 Hr 0.5 1.0 5 5 Long Term Stability (Note 4) AMS3100B-1.2 Typ Max IR - 100 µA Reverse Dynamic Impedance (Note 4) Reverse Breakdown Voltage Change with current (Note 3) Wide Band Noise (Note 4) Min 100 20 1.0 5 mV 10 15 µA µA 60 µV 75 ppm/°C 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 = 25°C. 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 0°C, 25°C, 85°C. TYPICAL APPLICATIONS Wide Input Range Reference Micropower Reference from 9V Battery 9V V IN = 2.3V TO 30V Reference from 1.5V Battery 1.5V 500k 3k LM334 1.2V 1.2V AMS3100-1.2 AMS3100-1.2 4.3k OUT 1.24V AMS3100-1.2 Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS3100-1.2 TYPICAL APPLICATIONS (Continued) 0°°C - 100°°C Thermometer 0°°C - 100°°C Thermometer Lower Power Thermometer * 150 150 M 1.3 TO 1.6V‡ 0-100µA M IOUT 0-50µA M 8k TO 12k† R1 4k AMS3100-1.2 R2 1k V+ LM334 R R2 1k V+ 1.5V (1.3-1.6V)† R LM334 AMS3100-1.2 V- R1 2k IOUT LM334 V- R3 100 R3 50 * 2N3638 or 2N2907 select for inverse HFE ≅ 5 † Select for operation at 1.3V ‡ IQ ≅ 600µA to 900 µA R4 220 1.3-1.6V AMS3100-1.2 R4 100 Calibration Calibration 1. Short AMS3100-1.2, adjust R3 for IOUT = temp at 1µA/°K 2. Remove short, adjust R2 for correct reading in °C † IQ at 1.3V ≅ 500 µA IQ at 1.6V ≅ 2.4mA 1. Short AMS3100-1.2, adjust R3 for IOUT = temp at 1.8µA/°K 2. Remove short, adjust R2 for correct reading in °F Centigrade Thermometer Micropower* 10V Reference IQ VIN = 15V 2.2k + V LM334 R V1.5V† V1 V2 90k 1M 25k OUTPUT 1mV/° C 2.3k 2 6 LM4250C 3 1.2k 7 + 27k 4 22M AMS3100-1.2 R1 1k Calibration 10V 8 150pF 3.5M AMS3100-1.2 500k *IQ ≅ 20µA standby current 1. Adjust R1 so that V1 = temp at 1mV/°K. 2. Adjust V2 to 273.2mV. † IQ for 1.3V to 1.6V battery voltage = 50µA to 150µA Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS3100-1.2 TYPICAL APPLICATIONS (Continued) Micropower Thermocouple Cold Junction Compensator V+ LM334 2k 1% 5.1k 1M 1% R Adjustment Procedure VMERCURY + CELL 1.345V TC ADJ 500 ZERO ADJ 100k AMS3100-1.2 R2 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. R1 Thermocouple Type + THERMOCOUPLE + J T K S METER COLD JUNCTION ISO THERMAL WITH LM334 Seebeck Coefficient (mV/ ° C) R1 (Ω Ω) R2 Voltage Voltage (Ω Ω ) Across R1 Across R2 @ 25°°C (mV) (mV) 52.3 42.8 40.8 6.4 523 432 408 63.4 1.24k 1k 953Ω 150Ω 15.60 12.77 12.17 1.908 14.32 11.78 11.17 1.766 Typical supply current 50µA Precision 1µ µ A to 1mA Current Sources AMS3100-1.2 30V AMS3100-1.2 C1 150pF R1 100k R1 100k 2 - + 2 - 7 6 LM312 7 6 LM312 3 C1 150pF 3 + 4 4 IOUT* IOUT* R2 1.5V TO 27V R2 -1.5V TO -27V -30V *IOUT =1.23V/R2 Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS3100-1.2 TYPICAL PERFORMANCE CHARACTERISTICS Reverse Characteristics 6 T A =70° C 4 T A =25° C 2 0 10 T A =70° C 1 T A =25° C 0.1 -2 0.2 0.4 0.6 0.8 1.0 1.2 1.4 REVERSE VOLTAGE (V) Reverse Dynamic Impedance IR= 100 µA 1.250 1.240 1.230 1.220 0.1 0.01 30 AMS3100-1.2 20 10 0 100 SHARP CUTOFF FILTER NOISE (nV/√Hz) 40 VOLTAGE SWING (V) 600 SINGLE POLE LOW PASS OUTPUT 500 400 300 200 100 10k 100k 1k FREQUENCY (Hz) 1M 1.5 OUTPUT INPUT 1.0 100k 0.5 0 OUTPUT ~ ~ ~ ~ 10 INPUT 100 0 1k 10k 100k CUTOFF FREQUENCY (Hz) 1 Response Time I R= 100 µA I R= 100 µA 100µA 10 2.0 700 50 100 Noise Voltage Filtered Output Noise 70 60 T A =25° C IR= 100 µA 1k 0.1 10 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (° C) 0.1 1 10 100 REVERSE CURRENT (mA) 0.1 1 10 100 FORWARD CURRENT (mA) 10k DYNAMIC IMPEDANCE (Ω) T A =25° C REFERENCE VOLTAGE (V) 1 T A =70° C 0.01 1.260 T A =70° C T A =25° C 0.4 Temperature Drift of 3 Representative Units 100 10 0.8 0 0 0.1 1 10 100 REVERSE CURRENT (mA) Reverse Dynamic Impedance DYNAMIC IMPEDANCE (Ω) 1.2 FORWARD VOLTAGE (V) 8 0.01 INTEGRATED NOISE (µV) Forward Characteristics 100 REVERSE CURRENT (µA) OUTPUT VOLTAGE CHANGE (mV) Reverse Characteristics 10 0 10 100 1k 10k FREQUENCY (Hz) 100k 0 200 400 TIME (µs) 600 Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS3100-1.2 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