LIN D O C #: 1004 LX1004 1.2V & 2.5V M I C R O P O W E R V O LTA G E R E F E R E N C E S T H E I N F I N I T E P O W E R O F I N N O VA T I O N P R O D U C T I O N DESCRIPTION The LX1004 Micropower Voltage References are two terminal bandgap reference diodes designed and optimized for accurate low power operation in portable and other power sensitive systems. Operating currents are guaranteed from as low as 10µA up to 20mA giving designers a great deal of flexibility in optimizing power consumption, noise and ultimate application performance. The LX1004 is available in fixed 1.2V and 2.5V reference values. D A T A S H E E T K E Y F E AT U R E S ■ GUARANTEED ±4mV INITIAL ACCURACY LX1004-1.2 ■ GUARANTEED ±20mV INITIAL ACCURACY LX1004-2.5 ■ GUARANTEED 10µA OPERATING CURRENT ■ GUARANTEED TEMPERATURE PERFORMANCE ■ OPERATES UP TO 20mA ■ VERY LOW DYNAMIC IMPEDANCE Process and circuit design optimization provide for high accuracy with initial tolerance values of ±4mV and ±20mV, respectively. Complementing their initial accuracy, the bandgap reference is temperature compensated to deliver 20ppm performance over the 0° to 70°C operating temperature range. The LX1004 from Linfinity is a pinfor-pin replacement for the LT1004 and LM385 families of voltage references. A P P L I C AT I O N S ■ ■ ■ ■ PORTABLE METER REFERENCES PORTABLE TEST INSTRUMENTS BATTERY OPERATED SYSTEMS CURRENT LOOP INSTRUMENTATION PRODUCT HIGHLIGHT MICROPOWER REFERENCE FROM 2 C ELL BATTERY MICROPOWER REFERENCE FROM 9V BATTERY 2V 9V 200k 39k 2.5V 1.235V LX1004-1.2V LX1004-2.5V PA C K A G E O R D E R I N F O R M AT I O N TA (°C) 0 to 70 Reference Initial Voltage Tolerance SOIC DM Plastic 8-pin TO-92 LP Plastic 3-pin 1.2V ±4mV LX1004CDM-1.2 LX1004CLP-1.2 2.5V ±20mV LX1004CDM-2.5 LX1004CLP-2.5 Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number. (i.e. LX1004CDM-2.5T) F O R F U R T H E R I N F O R M AT I O N C A L L ( 7 1 4 ) 8 9 8 - 8 1 2 1 Copyright © 1996 Rev. 1.2 6/96 11861 W ESTERN A VENUE , G ARDEN G ROVE , CA. 92841 1 PRODUCT DATABOOK 1996/1997 LX1004 1.2V & 2.5V M I C R O P O W E R V O LTA G E R E F E R E N C E S P R O D U C T I O N A B S O L U T E M A X I M U M R AT I N G S D A T A S H E E T PACKAGE PIN OUTS (Note 1) Reverse Breakdown Current .................................................................................... 30mA Forward Current ........................................................................................................ 10mA Operating Temperature Range ....................................................................... 0°C to 70°C Storage Temperature Range ...................................................................... -65°C to 150°C Lead Temperature (soldering, 10 seconds) ............................................................. 300°C Note 1. Values beyond which damage may occur. All voltages are specified with respect to ground, and all currents are positive into the specified terminal 8. 2. 7. 3. 4. DM PACKAGE (Top View) 2. CATHODE 3. N/C DM PACKAGE: 165ºC/W LP PACKAGE: THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA CATHODE N/C 6. CATHODE 5. N/C 1. 1. ANODE T H E R MAL DATA THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA N/C N/C N/C ANODE 165ºC/W LP PACKAGE (Top View) The θ JA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. 2 Copyright © 1996 Rev. 1.2 6/96 PRODUCT DATABOOK 1996/1997 LX1004 1.2V & 2.5V M I C R O P O W E R V O LTA G E R E F E R E N C E S P R O D U C T I O N D A T A S H E E T ELECTRICAL CHARACTERISTICS (Unless otherwise specified, these specifications apply to TA = 25ºC for LX1004C. Typ. number represents TA = 25ºC value. LX1004 - 1.2 Parameter Reverse Breakdown Voltage Average Temperature Coefficient Minimum Operating Current Reverse Breakdown Voltage Change with Current Reverse Dynamic Impedance Wide Band Noise (RMS) Long Term Stability Symbol VZ ∆VZ ∆Temp IMIN ∆VZ ∆IR rz en ∆VZ ∆Time Test Conditions IR = 100µA, TA = 25°C 0°≤ TA ≤ 70°C IMIN ≤ IR ≤ 20mA LX1004 - 1.2 Min. Typ. Max. 1.231 1.225 0°≤ TA ≤ 70°C I MIN ≤ IR ≤ 1mA, TA = 25°C IMIN ≤ IR ≤ 1mA, 0° ≤ T A ≤ 70°C 1mA ≤ IR ≤ 20mA, TA = 25°C 1mA ≤ IR ≤ 20mA, 0° ≤ TA ≤ 70°C IR = 100µA, TA = 25°C IR = 100µA, 0° ≤ TA ≤ 70°C IR = 100µA; 10Hz ≤ f ≤ 10kHz IR = 100µA; TA = 25°C ± 0.1°C Units 1.235 1.235 20 1.239 1.245 V V ppm/°C 8 10 1 1.5 10 20 0.6 1.5 µA mV mV mV mV Ω Ω µV ppm/kHr 0.2 60 20 LX1004 - 2.5 Parameter Reverse Breakdown Voltage Average Temperature Coefficient Minimum Operating Current Reverse Breakdown Voltage Change with Current Reverse Dynamic Impedance Wide Band Noise (RMS) Long Term Stability Symbol VZ ∆VZ ∆Temp IMIN ∆VZ ∆IR rz en ∆VZ ∆Time Test Conditions IR = 100µA, TA = 25°C 0°≤ TA ≤ 70°C IMIN ≤ IR ≤ 20mA LX1004 - 2.5 Min. Typ. Max. 2.480 2.470 2.500 2.520 2.530 V V ppm/°C 20 1 1.5 10 20 0.6 1.5 µA mV mV mV mV Ω Ω µV ppm/kHr 20 0°≤ TA ≤ 70°C I MIN ≤ IR ≤ 1mA, TA = 25°C IMIN ≤ IR ≤ 1mA, 0° ≤ T A ≤ 70°C 1mA ≤ IR ≤ 20mA, TA = 25°C 1mA ≤ IR ≤ 20mA, 0° ≤ TA ≤ 70°C IR = 100µA, TA = 25°C IR = 100µA, 0° ≤ TA ≤ 70°C IR = 100µA; 10Hz ≤ f ≤ 10kHz IR = 100µA; TA = 25°C ± 0.1°C 12 0.2 Units 120 20 GRAPH / CURVE INDEX Characteristic Curves — LX1004-1.2V Characteristic Curves — LX1004-2.5V FIGURE # FIGURE # 1. TEMPERATURE DRIFT 1. RESPONSE TIME 2. REVERSE CHARACTERISTICS 2. REVERSE CHARACTERISTICS 3. REVERSE VOLTAGE CHANGE 3. FORWARD CHARACTERISTICS 4. FORWARD CHARACTERISTICS 4. TEMPERATURE DRIFT 5. REVERSE DYNAMIC IMPEDANCE 5. NOISE VOLTAGE 6. NOISE VOLTAGE 6. REVERSE DYNAMIC IMPEDANCE 7. RESPONSE TIME Copyright © 1996 Rev. 1.2 6/96 3 PRODUCT DATABOOK 1996/1997 LX1004 1.2V & 2.5V M I C R O P O W E R V O LTA G E R E F E R E N C E S P R O D U C T I O N D A T A S H E E T C H A R A C T E R I S T I C C U R V E S — LX1004-1.2V FIGURE 1. — TEMPERATURE DRIFT FIGURE 2. — REVERSE CHARACTERISTICS 1.242 100 IR = 100µA 1.24 Reverse Current - (µA) Reference Voltage - (V) TA = 0 to 70°C 1.238 1.236 1.234 1.232 1.23 10 1 1.228 0.1 1.226 0 10 20 30 40 50 60 0 70 0.2 0.4 FIGURE 3. — REVERSE VOLTAGE CHANGE 1.0 1.2 1.4 FIGURE 4. — FORWARD CHARACTERISTICS 1.2 16 TA = 25°C 14 TA = 0 to 70°C Forward Voltage - (V) Output Voltage Change - (mV) 0.8 Reverse Voltage - (V) Temperature - (°C) 12 0.6 10 8 6 4 2 0.8 0.4 0 -2 -4 0.01 0.1 1 10 Reverse Current - (mA) 4 100 0 0.01 0.1 1 10 100 Forward Current - (mA) Copyright © 1996 Rev. 1.2 6/96 PRODUCT DATABOOK 1996/1997 LX1004 1.2V & 2.5V M I C R O P O W E R V O LTA G E R E F E R E N C E S P D R O D U C T I O N A T A S H E E T C H A R A C T E R I S T I C C U R V E S — LX1004-1.2V FIGURE 5. — REVERSE DYNAMIC IMPEDANCE FIGURE 6. — NOISE VOLTAGE 800 1000 700 (VN) Noise Voltage - (nV/ Hz) Dynamic Impedance - (Ω) TA = 25°C 100 10 1 600 500 400 300 200 100 0 10 0.1 10 100 1k 10k IR = 100µA TA = 25°C 100k 100 (f) Frequency - (Hz) 1k 10k 100k (f) Frequency - (Hz) Output Voltage FIGURE 7. — RESPONSE TIME 1.5V 1.0V VIN 0.5V 36k VOUT Input Voltage 0 5V 0 0 50 100 500 550 Time - (µs) Copyright © 1996 Rev. 1.2 6/96 5 PRODUCT DATABOOK 1996/1997 LX1004 1.2V & 2.5V M I C R O P O W E R V O LTA G E R E F E R E N C E S P R O D U C T I O N D A T A S H E E T C H A R A C T E R I S T I C C U R V E S — LX1004-2.5V FIGURE 9. — REVERSE CHARACTERISTICS 4.0V 2.0V VIN 24K VOUT 0 Input Voltage TA = 25°C 100 TA = 25°C Reverse Current - (µA) Output Voltage FIGURE 8. — RESPONSE TIME 10 1 5 0 0.1 0 1.0 Time - (100µs/Div.) 2.0 3.0 4.0 5.0 Reverse Voltage - (V) FIGURE 10. — FORWARD CHARACTERISTICS FIGURE 11. — TEMPERATURE DRIFT 1.0 2.52 TA = 25°C 2.515 Reference Voltage - (V) Forward Voltage - (V) 0.8 0.6 0.4 2.51 2.505 2.5 2.495 2.49 0.2 2.485 0 0.001 0.01 0.1 1 Forward Current - (mA) 6 10 100 2.48 -40 20 0 20 40 60 80 100 Temperature - (°C) Copyright © 1996 Rev. 1.2 6/96 PRODUCT DATABOOK 1996/1997 LX1004 1.2V & 2.5V M I C R O P O W E R V O LTA G E R E F E R E N C E S P R O D U C T I O N D A T A S H E E T C H A R A C T E R I S T I C C U R V E S — LX1004-2.5V FIGURE 12. — NOISE VOLTAGE FIGURE 13. — REVERSE DYNAMIC IMPEDANCE TA = 25°C IR = 100µA 1800 Dynamic Impedance - (Ω) (VN) Noise Voltage - (nV/ Hz) 100 1500 1200 900 600 300 10 1 IR = 100µA TA = 25°C 100 1k 10k (f) Frequency - (Hz) Copyright © 1996 Rev. 1.2 6/96 10 100k 0.1 10 100 1k 10k 100k (f) Frequency - (Hz) 7