DATA SHEET LND393 Dual Differential Comparators GENERAL DESCRIPTION FEATURES The LND393 consists of two independent precision voltage comparators with an offset voltage specification as low as 2.0 mV max for two comparators. They are specifically designed to operate from a single power supply over a wide range of voltages. In addition, the comparators have the unique ability in that the input common-mode voltage range includes ground, while operated from a single power supply voltage. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. • Application areas include limit comparators, simple analog to digital converters, pulse, squarewave and time delay generators: wide range VCO, MOS clock timers, multi-vibrators and high voltage digital logic gates. The LND393 was designed to directly interface with TTL and CMOS. When the LND393 is operated from both plus and minus power supplies, it will directly interface with MOS logic where their low power drain is a distinct advantage over standard comparators. PIN CONFIGURATION OUTPUT A INVERTING INPUT A 2 NON-INVERTING INPUT A 3 GROUND 8 1 4 A B V+ 7 OUTPUT B 6 INVERTING INPUT B 5 NON-INVERTING INPUT B - + + - • • • • • • • Wide supply (Voltage range single and dual supplies 5V to 30V, ±2.5V to ±15V) Very Low supply current drain(0.8mA) Low input biasing current(25nA) Low input offset voltage(±5nA) Maximum offset voltage(±5mV) Input common-mode voltage range includes ground Differential input voltage range equal to the power supply voltage Output voltage compatible with TTL, DTL,ECL ,MOS and CMOS logic systems ADVANTAGES • • • • • • High precision comparators Reduce VOS drift over temperature Power drain suitable for battery operation Compatible with all forms of logic Allows sensing near ground Eliminates need for dual supplies • Linear Dimensions, Inc. • 445 East Ohio Street, Chicago IL 60611 USA • tel 312.321.1810 • fax 312.321.1830 • www.lineardimensions.com • LND393 ELECTRICAL CHARACTERISTICS Parameter Test Conditions * VIO Input offset voltage VCC=5V to 30V VIC=VICR min, VO=1.4V VO=1.4V IIO Input offset current IIB Input bias current VICR Common-mode input voltage range** AVD Large-signal differential voltage amplification IOH High-level output current VCC =15V VO=1.4V to 11.4 V, RL≥15kΩ VOH =5V, VID =1V VOH =30V, VID =1V VOL Low-Level output voltage IOL=4mA, VID=-1V IOL Low-level output current ICC Supply current VOL=1.5V,VID =-1V VCC=5V VCC=30V Typ Max 2 5 mV 5 9 50 nA -25 150 -250 nA 0 -400 VCC -1.5 V 0 VCC -2 25°C Full range 25°C Full range 25°C Full range 25°C VO =1.4V RL=∞ Min Full Range 25°C 25°C Full Range 25°C Full Range 25°C 50 200 Unit V/mV 0.1 50 1 nA µA 150 400 700 mV mA 6 mA 0.8 25°C Full Range 1 2.5 mA mA *Full range (MIN to Max), for the LND393 is 0°C to 70°C. All characteristics are measured with zero common-mode input voltage unless otherwise specified. **The voltage at either input or common-mode should not be allowed to go negative by more than 0.3V. The upper end of the common-mode voltage range is VCC –1.5V, but either or both inputs can go to 30V without damage. SWITCHING CHARACTERISTICS Parameter Test Conditions Response time RL connected to 5V through 5.1 kΩ, CL=15pF*(see Note 1) Min 100-mV input step with 5-mV overdrive TTL-level input step Typ 1.3 Max Unit µs 0.3 *CL includes probe and jig capacitance. Note 1: The response time specified is the interval between the input step function and the instant when the output crosses 1.4V. • Linear Dimensions, Inc. • 445 East Ohio Street, Chicago IL 60611 USA • tel 312.321.1810 • fax 312.321.1830 • www.lineardimensions.com • LND393 TYPICAL APPLICATIONS (V+ =5.0Vdc) +5.0 V DC V+ 100 K 1 3.0 K + +V IN 3 2 LND393A + LND393A +V REF VO - DRIVING CMOS BASIC COMPARATOR +5.0 V DC V+ 3.0 K 10 K 1 +V REF 3 + LND393A 1/2 LND193 2 +V IN - 1 10M 3 2 VO + 10K NON INVERTING COMPARATOR WITH HYSTERESIS DRIVING TTL V+ V+ (12 Vdc) 3.0 K +V REF +V REF HI 1/2 LND193 +V IN 10.0 K VO + 1M + 2RS +V IN 1/2LND193 - 1 LAMP RS 1M 1 2 + 1M 1/2LND193 2 INVERTING COMPARATOR WITH HYSTERESIS +V REF LOW - 2RS LIMIT COMPARATOR • Linear Dimensions, Inc. • 445 East Ohio Street, Chicago IL 60611 USA • tel 312.321.1810 • fax 312.321.1830 • www.lineardimensions.com • LND393 V+ 15k V+ D1 * 1M 4.3K R1 D2 100k 100K 6µs R2 60µ s t0t1 t2 1/2 LND193 75 pF - V+ VO + 1/2 LND193 0 1-100kHz 80 pF V+ +15 Vdc 100K 100K VO + 1M 1M 100K 1M * For Large Raios of R1/R2, D1 can be omitted. SQUAREWAVE OSCILLATOR PULSE GENERATOR V+ 5.1k 100k 5.1k V IN 100k 5.1k 1/2 LND193 VO + 20M 10k ZERO DETECTOR CROSSING (SINGLE POWER SUPPLY) • Linear Dimensions, Inc. • 445 East Ohio Street, Chicago IL 60611 USA • tel 312.321.1810 • fax 312.321.1830 • www.lineardimensions.com •