DATA SHEET LND339 Quadruple Differential Comparators GENERAL DESCRIPTION The LND339 consists of four independent precision voltage comparators with an offset voltage as low as 2mV max for all four comparators, designed specifically to operate from a single power supply over a wide range of voltages. These comparators also have a unique characteristic in that the input common-mode voltage range includes ground, even though 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 LND339 was designed to directly interface with TTL and CMOS. When the LND339 series 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. FEATURES * * * * * * * * Wide supply voltage range (5 to 30VDC or 2.5 to 15VDC ) Very low supply current drain(0.8mA)independent of supply voltage Low input biasing current: (25nA) Low input offset current(5nA) Offset voltage(2mV) Input common-mode voltage range includes GND 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 * Reduced VOS drift over temperature * Power drain suitable for battery operation * Allows sensing near ground * Compatible with all forms of logic * 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 * LND339 ELECTRICAL CHARACTERISTICS Parameter Test Conditions VIO Input offset voltage VCC=5V to 30V VIC=VICR min, VO=1.4V IIO Input offset current VO=1.4V IIB Input bias current VO =1.4V VICR Common-mode input voltage range** AVD Large-signal differential voltage amplification IOH High-level output current VOL Low-Level output voltage VCC =15V VO=1.4V to 11.4 V, RL15k VOH =5V, VID =1V VOH =30V, VID =1V IOL=4mA, VID=-1V IOL Low-level output current VOL=1.5V,VID =-1V ICC Supply current RL= VCC=5V VCC= 30V Min 25C Full range* 25C Full range* 25C Full range* Typ Max 2 5 9 50 150 250 400 5 25 25C Full Range* 0 VCC -1.5 0 VCC - 2 25C 50 0.1 25C Full Range* 25C Full Range* 25C 200 150 6 mV nA nA V V/mV 50 nA 1 A 400 mV 700 mV 16 mA 0.8 25C Full Range* Unit 2 mA 2.5 mA *Full range (MIN to Max), for the LND339 is 0C to 70C. 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 k, CL=15pF*(see Note 1) Min 100-mV input step with 5-mV overdrive TTL-level input step Typ 1.3 Max Unit s 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 * LND339 PIN CONFIGURATION OUTPUT 3 OUTPUT 4 GND INPUT 4+ INPUT 4- INPUT 3+ INPUT 314 13 12 11 10 9 8 OUTPUT 2 OUTPUT 1 + - 4 3+ - V+ INPUT 1- 2 + - 1 1 2 3 OUTPUT 2 OUTPUT 1 V+ 5 4 INPUT 1+ + - 6 1 14 2 13 3 12 LM139W LND339 4 OUTPUT 3 OUTPUT 4 GND INPUT 4+ 11 INPUT 4- 5 10 INPUT 2- 6 9 INPUT 3+ INPUT 2+ 7 8 INPUT 3- 7 INPUT 1- INPUT 1+ INPUT 2- INPUT 2+ SOME TYPICAL APPLICATIONS (V+=5.0 Vdc) +5.0 V DC V+ 100 K 3.0 K 1 3 + +V IN + +V REF - 1/4LND139 - V BASIC COMPARATOR 12 DRIVING CMOS +5.0 V DC V+ 3.0 K 10 K 3 1 + 1/4LND139 - 3 2 1/4LND139 3 2 1 DRIVING TTL 3 1/4LND139 +V IN 12 2 +V REF VO + 10K 10M NON INVERTING COMPARATOR WITH HYSTERESIS * Linear Dimensions, Inc. * 445 East Ohio Street, Chicago IL 60611 USA * tel 312.321.1810 * fax 312.321.1830 * www.lineardimensions.com * LND339 V+ V+ (12 Vdc) 10.0 K 3.0 K +V IN +V REF HI - + 2RS 1/4LND139 V+ VO + - 1 1M 1 2 1/4LND139 +V IN LAMP RS 1M + 1/4LND139 - 2 1M 2RS +V REF LOW INVERTING COMPARATOR WITH HYSTERESIS LIMIT COMPARATOR V+ 15k D1 * 1M V+ R1 D2 100k 4.3K 6s R2 100K 60 s t0t1 t2 V+ 0 1/4 LND139 80 pF 1/4LND139 75 pF VO + 0 f 100kHz +15 Vdc 1M 1M V+ 100K VO + V+ 100K 1M 100K * For Large Raios of R1/R2, D1 can be omitted. SQUAREWAVE OSCILLATOR PULSE GENERATOR * Linear Dimensions, Inc. * 445 East Ohio Street, Chicago IL 60611 USA * tel 312.321.1810 * fax 312.321.1830 * www.lineardimensions.com * LND339 V+ 5.1k 100k 5.1k 100k 5.1k V IN 1/4 LND139 VO + 20M 10k ZERO DETECTOR CROSSING (SINGLE POWER SUPPLY) SPLIT SUPPLY APPLICATIONS V+ V+ 5.1k 5.1k 3 3 + + 1 1 + 1/4 LND139 1/4 LND139 VO - V IN + 12 - V IN VO 12 2 2 V- ZERO CROSSING DETECTOR -5 Vdc V- COMPARATOR WITH A NEGATIVE REFERENCE * Linear Dimensions, Inc. * 445 East Ohio Street, Chicago IL 60611 USA * tel 312.321.1810 * fax 312.321.1830 * www.lineardimensions.com *