 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| ADVANCED LINEAR DEVICES, INC. ALD1502/ALD2502 SINGLE/DUAL PRECISION HIGH SPEED MICROPOWER TIMER GENERAL DESCRIPTION The ALD1502/ALD2502 timers are high performance single/dual monolithic timing circuits built with advanced silicon gate CMOS technology. They offer the benefits of high input impedance, thereby allowing smaller timing capacitors and a longer timing cycle; high speed, with typical cycle time of 400ns; low power dissipation for battery operated environment; reduced supply current spikes, allowing smaller and lower cost decoupling capacitors. Each timer is capable of producing accurate time delays and oscillations in both monostable and astable operation, and operates in the one-shot (monostable) mode or 50% duty cycle free running oscillation mode with a single resistor and one capacitor. The inputs and outputs are fully compatible with CMOS, NMOS or TTL logic. There are three matched internal resistors (approximately 200K each) that set the threshold and trigger levels at two-thirds and one-third respectively of V+. These levels can be adjusted by using the control terminal. When the trigger input is below the trigger level, the output is in the high state and sourcing 2mA. When the threshold input is above the threshold level at the same time the trigger input is above the trigger level, the internal flip-flop is reset, the output goes to the low state and sinks up to 10mA. The reset input overrides all other inputs and when it is active (reset voltage less than 1V), the output is in the low state. FEATURES * * * * * * * * * * * High speed operation -- 2.5MHz typical oscillation at 5V High discharge sinking current of 80mA at 5V Guaranteed low operating supply voltage of 2V to 12V Functional equivalent to and same pin-out as NE555/NE556 with greatly expanded high and low frequency ranges High speed, low power, monolithic CMOS technology Low supply current 50A typical for ALD1502 and100A typical for ALD2502 Extremely low trigger, threshold and reset currents 10pA typical Operates in both monostable and astable modes Fixed 50% duty cycle or adjustable duty cycle CMOS, NMOS and TTL compatible input/output Low supply current spikes APPLICATIONS * High speed one-shot (monostable) pulse generation Precision timing Sequential timing Long delay timer Pulse width and pulse position modulation * Missing pulse detector * Frequency divider * Synchronized timer * * * * PIN CONFIGURATION GND TRIG OUT RST 1 2 3 4 TOP VIEW DA, PA, SA PACKAGE 8 7 6 5 V+ DISC THRES CONT DSC1 THRES1 CONT1 RST1 OUT1 TRIG1 GND 1 2 3 4 5 6 7 TOP VIEW DB, PB, SB PACKAGE 14 13 12 11 10 9 8 V+ DSC2 THRES2 CONT2 RST2 OUT2 TRIG2 BLOCK DIAGRAM (EACH TIMER) V+ (8) ORDERING INFORMATION -55C to +125C Operating Temperature Range * 0C to +70C 0C to +70C 8-Pin Small Outline Package (SOIC) ALD1502 SA 8-Pin Plastic Dip Package ALD1502PA THRESHOLD (6) CONTROL (5) R R S TRIGGER (2) R R RESET (4) OUTPUT (3) DISCHARGE (7) 8-Pin CERDIP Package ALD1502 DA 14-Pin CERDIP Package ALD2502 DB 14-Pin Small Outline 14-Pin Plastic Dip Package (SOIC) Package ALD2502 SB ALD2502 PB GND (1) * Contact factory for industrial temperature range (c) 1998 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com ABSOLUTE MAXIMUM RATINGS Supply voltage, V+ Input voltage range Power dissipation Operating temperature range Storage temperature range Lead temperature, 10 seconds 13.2V -0.3V to V+ +0.3V 600 mW 0C to + 70C -55C to +125C -65C to +150C +260C PA, PB, SA, SB package DA, DB package OPERATING ELECTRICAL CHARACTERISTICS TA = 25oC V+ = +5V unless otherwise specified Parameter Supply Voltage Supply Current ALD1502 Supply Current ALD2502 Timing error / Astable mode Initial Accuracy Drift with Temperature 1 Drift with Supply Voltage 1 Threshold Voltage Trigger Voltage Trigger Current 2 Reset Voltage Reset Current 2 Threshold Current 2 Control Voltage Level Output Voltage Drop (Low) Output Voltage Drop (High) Rise Time of Output 1 Fall Time of Output 1 Discharge Transistor Leakage Current Discharge Voltage Drop Symbol V+ IS IS terr t/T t/V+ VTH VTRIG ITRIG VRST IRST ITH VCONT VOL VOH tr tf IDL Min 2 Typ Max 12 Unit V A A % Test Conditions 50 100 1.0 90 180 2.2 Outputs Unloaded C = 0.1F 10.0 0.2 3.233 1.567 3.333 1.667 .01 0.4 0.7 .01 .01 3.233 3.333 0.2 4.2 4.6 10 10 .01 20 20 3.433 1.767 0.4 1.0 0.4 0.4 3.433 0.4 ppm/C %/V V V nA V nA nA V V V ns ns nA RA = 1K RB = 1K ISINK = 10mA ISOURCE = -2mA RL = 10M CL = 10pF VDISC 0.5 0.2 1.0 0.4 V V I DISCHARGE = 80mA I DISCHARGE = 30mA RA = 470 RB = 200 CT =100pF Maximum Frequency Astable Mode fMAX 1.5 2.5 MHz Minimum Trigger Pulse Width1 tTRIG 50 100 ns Notes: 1 2 Sample tested parameters. Consists of junction leakage currents with strong temperature dependence. ALD1502/ALD2502 Advanced Linear Devices 2 TYPICAL PERFORMANCE CHARACTERISTICS DISCHARGE OUTPUT SINK CURRENT AS A FUNCTION OF DISCHARGE LOW VOLTAGE DISCHARGE SINK CURRENT (mA) MINIMUM PULSE WIDTH REQUIRED FOR TRIGGERING 800 MINIMUM PULSE WIDTH (ns) 100 50 20 10 5.0 2.0 1.0 0.5 0.2 0.1 0.01 0.02 0.05 0.1 0.2 0.5 1.0 TA = 25C V+ = 12V V+ = 5V V+ = 2V 700 600 500 400 300 200 100 0 0 TA = 25C V+ = 2V V+= 5V V+ =12V 10 20 30 40 DISCHARGE LOW VOLTAGE (V) LOWEST VOLTAGE LEVEL OF TRIGGER PULSE ( % VDD ) FREE RUNNING FREQUENCY AS A FUNCTION OF RA, RB AND C 10 mF FREQUENCY CHANGE (%) FREQUENCY CHANGE IN THE ASTABLE MODE AS A FUNCTION OF SUPPLY VOLTAGE +4 +3 +2 +1 0 -1 -2 -3 -4 1 mF 100 F CAPACITANCE ( RA- 2RB) TA = 25C 10 F 1 F 100 nF 10 nF 1 nF 100 pF 0.1 1.0 10 100 1K 10K 100K 1M 10M 100M FREQUENCY (Hz) 10 10 10 1K K 10 0M 1M 0K M 0 2 4 6 8 10 12 SUPPLY VOLTAGE (V) TIME DELAY IN THE MONOSTABLE MODE AS A FUNCTION OF RA AND C 10 mF RA SUPPLY CURRENT AS A FUNCTION OF SUPPLY VOLTAGE 100 SUPPLY CURRENT (A) 1 mF 100 F TA = 25C 90 80 70 60 50 40 30 20 10 0 0 2 4 6 8 10 12 SUPPLY VOLTAGE (V) TA = - 40C TA = + 20C TA = + 85C CAPACITANCE 1 F 100 nF 10 nF 1 nF 100 pF 1K 10 10 K 0K 10 F 1M M 10 0M 10 1G 100ns 1s 10s 100s 1ms 10ms 100ms 1s 10s 100s ALD1502/ALD2502 TIME DELAY Advanced Linear Devices 3 TYPICAL PERFORMANCE CHARACTERISTICS OUTPUT SINK CURRENT AS A FUNCTION OF OUTPUT VOLTAGE 100 OUTPUT SOURCE CURRENT (mA) OUTPUT SOURCE CURRENT AS A FUNCTION OF OUTPUT VOLTAGE -0.1 -0.2 -0.5 -1.0 -2.0 -5.0 -10 -20 -50 -100 V+ = 2V V+ = 5V V+ = 12V OUTPUT SINK CURRENT (mA) 50 20 10 5.0 2.0 1.0 0.5 0.2 0.1 0.01 TA = 25C V+ = 12V V+ = 5V V+ = 2V 0.02 0.05 0.1 0.2 0.5 1.0 -1.0 -0.5 -0.2 -0.1 -0.05 -0.02 -0.01 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) (REFERENCED TO V+) TYPICAL APPLICATIONS ( EACH TIMER ) ASTABLE MODE OPERATION 50% DUTY CYCLE V+ ASTABLE MODE OPERATION (FREE RUNNING OSCILLATOR) V+ 1 2 R 3 V+ 4 8 0.1F 7 6 C 5 V+ 1 2 3 4 8 RA 7 RB 6 C 5 0.1F Frequency f = 1/ (1.4 RC) Frequency f = 1.46 / (RA + 2RB)C Duty Cycle DC = RB / (RA + 2RB) MONOSTABLE MODE OPERATION (ONE SHOT PULSE) Pulse Delay td = 1.1 RC V+ 1 TRIGGER INPUT DELAYED PULSE OUTPUT RESET 2 3 4 8 R 7 6 C 5 0.1F ALD1502/ALD2502 Advanced Linear Devices 4 |
Price & Availability of ALD2502DB
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |