Advanced Monolithic Systems AMS3100-2.5 MICROPOWER VOLTAGE REFERENCE FEATURES APPLICATIONS • ±12 mV (±0.5%) max. initial tolerance (A grade) • Operating Current 20µ µ A to 20mA • Low Voltage Reference 2.50V • 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 AMS3100-2.5 are two-terminal micropower band-gap voltage reference that feature a very low dynamic impedance and good temperature coefficient, operating over a 20µA 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 -40°C to 85°C temperature range and is available in the space saving SOT-23 package. ORDERING INFORMATION: TOL. PACKAGE TYPE SOT-23 ±12mV AMS3100-2.5AM ±25mV AMS3100-2.5BM ±50mV AMS3100-2.5CM 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 AMS3100-2.5 ABSOLUTE MAXIMUM RATINGS 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 Reverse Breakdown Voltage (Note 3) Reverse Dynamic Impedance (Note 3) Reverse Breakdown Voltage Change with current (Note 3) Conditions Min 2.488 2.500 2.512 IR - 100 µA, f =20Hz 0.2 0.60 10µA ≤IR ≤1mA 1mA ≤IR ≤20mA 1.0 10 12 IR - 100 µA, 10Hz ≤ f ≤ 10kHz Temperature Coeff. (Note 5) Long Term Stability (Note 4) Min AMS3100B-2.5 Typ Max 2.475 2.500 2.525 AMS3100C-2.5 Min Typ Max 2.450 2.500 2.550 Units V IR - 100 µA Min. Operating Current (Note 3) Wide Band Noise (Note 4) AMS3100A-2.5 Typ Max TA=25°C±.1°C T = 1000 Hr 1 1.0 10 20 25 13 Ω 1 20 30 13 120 120 120 25 50 100 20 20 20 2.0 20 mV 20 30 µA µA µV 150 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 -40°C, 25°C and 85°C. 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 ppm/°C ppm AMS3100-2.5 TYPICAL APPLICATIONS (Continued) 0°°C - 100°°C Thermometer 0°°C - 100°°C Thermometer 1k 150 0-100µA M 0-50µA M R1 8k IOUT R2 1k V+ R LM334 R1 4k IOUT R2 1k V+ 3V R LM334 AMS3100-2.5 3V AMS3100-2.5 - V- V R3 100 R3 50 R4 100 R4 220 Calibration Calibration 1. Short AMS3100-2.5, adjust R3 for IOUT = temp at 1µA/°K 2. Remove short, adjust R2 for correct reading in °C 1. Short AMS3100-2.5, 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 V+ VIN = 15V 47k R LM334 IQ VIN ≥ 5.2V 500k 2 2N2905 V- 2.2k 3 6 LM4250C + 7 3 VO = 5V IL ≤ 100mA 6 LM4250C 2 7 + 8 1N457 4 150pF 1N457 10V 8 4 22M 150pF 1.5M 100k + 4.7µF TANTALUM 500k AMS3100-2.5 10M 2k 100k AMS3100-2.5 *IQ ≅ 40µA *IQ ≅ 20µA 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% R Adjustment Procedure V3V + LITHIUM AMS3100-2.5 TC ADJ 500 ZERO ADJ 100k 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 6.4 523 432 412 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 AMS3100-2.5 30V AMS3100-2.5 C1 150pF R1 68k R1 68k 2 - + 2 - 7 3 4 IOUT* IOUT* 7 6 LM312 6 LM312 3 C1 150pF + 4 R2 1.5V TO 27V R2 -1.5V TO -27V -30V *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 8 T A =25° C 4 T A =-40° C 0 10 T A =85° C T A =-40° C 1 T A =25° C Reverse Dynamic Impedance 0.5 1.0 1.5 2.0 2.5 REVERSE VOLTAGE (V) 0.01 1 T A =25° C 0.1 0.01 0.1 1 10 100 REVERSE CURRENT (mA) Reverse Dynamic Impedance IR= 100 µA 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) 100 AMS3100-2.5 SHARP CUTOFF FILTER OUTPUT 1000 800 600 400 200 0 1k 10k 100k CUTOFF FREQUENCY (Hz) 1M Response Time VOLTAGE SWING (V) OUTPUT 10k 100k 1k FREQUENCY (Hz) I R= 100 µA NOISE (nV/√Hz) 100µA 40 0 100 1 1200 60 20 10 3.0 SINGLE POLE LOW PASS 100 80 100 0.1 10 1400 I R= 100 µA T A =25° C IR= 100 µA 1k Noise Voltage Filtered Output Noise 120 0.1 1 10 100 FORWARD CURRENT (mA) 10k DYNAMIC IMPEDANCE (Ω) T A =-40° C 10 T A =25° C 0.4 Temperature Drift REFERENCE VOLTAGE (V) T A =85° C 0.8 3.0 2.530 100 T A =-40° C 0 0 0.1 1 10 100 REVERSE CURRENT (mA) 1.2 T A =85° C 0.1 -4 1000 DYNAMIC IMPEDANCE (Ω) 1.6 FORWARD VOLTAGE (V) T A =85° C 12 0.01 INTEGRATED NOISE (µV) Forward Characteristics 100 REVERSE CURRENT (µA) OUTPUT VOLTAGE CHANGE (mV) Reverse Characteristics 16 2.0 INPUT 100k OUTPUT 1.0 0 ~ ~ ~ ~ 10 INPUT 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 AMS3100-2.5 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