ALD2502SB [ALD]
SINGLE/DUAL PRECISION HIGH SPEED MICROPOWER TIMER; 单路/双路精密高速微功耗定时器
| 型号： | ALD2502SB |
| 厂家： | 
ADVANCED LINEAR DEVICES |
| 描述： | SINGLE/DUAL PRECISION HIGH SPEED MICROPOWER TIMER |
| 文件： | 总4页 (文件大小：42K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
A
L
D
DVANCED
INEAR
EVICES, INC.
ALD1502/ALD2502
SINGLE/DUAL PRECISION HIGH SPEED MICROPOWER TIMER
GENERAL DESCRIPTION
APPLICATIONS
The ALD1502/ALD2502 timers are high performance single/dual mono-
lithic 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.
• 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
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.
PIN CONFIGURATION
There are three matched internal resistors (approximately 200KΩ each)
that set the threshold and trigger levels at two-thirds and one-third respec-
tively of V . These levels can be adjusted by using the control terminal.
+
V
GND
TRIG
OUT
RST
1
2
3
8
7
6
5
+
DISC
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
levelatthesametimethetriggerinputisabovethetriggerlevel, theinternal
flip-flopisreset, theoutputgoestothelowstateandsinksupto10mA. The
resetinputoverridesallotherinputsandwhenitisactive(resetvoltageless
than 1V), the output is in the low state.
THRES
CONT
4
TOP VIEW
DA, PA, SA PACKAGE
+
1
14
V
DSC
1
1
1
FEATURES
THRES
2
3
4
13 DSC
2
• 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 50µA typical for ALD1502
and100µA typical for ALD2502
CONT
RST
12 THRES
2
11
10
9
CONT
1
2
5
6
7
OUT
RST
2
1
OUT
TRIG
2
1
8
GND
TRIG
2
TOP VIEW
DB, PB, SB PACKAGE
• 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
BLOCK DIAGRAM (EACH TIMER)
+
V
(8)
RESET
(4)
ORDERING INFORMATION
Operating Temperature Range *
THRESHOLD
(6)
R
S
R
R
-55°C to +125°C
0°C to +70°C
0°C to +70°C
CONTROL
(5)
OUTPUT
(3)
8-Pin
8-Pin Small Outline 8-Pin Plastic Dip
DISCHARGE
(7)
CERDIP Package
ALD1502 DA
Package (SOIC)
ALD1502 SA
Package
ALD1502PA
TRIGGER
(2)
R
14-Pin
14-Pin Small Outline 14-Pin Plastic Dip
CERDIP Package
ALD2502 DB
Package (SOIC)
ALD2502 SB
Package
ALD2502 PB
GND
(1)
* Contact factory for industrial temperature range
© 1998 Advanced Linear Devices, Inc. 415Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com
ABSOLUTE MAXIMUM RATINGS
+
Supply voltage, V
13.2V
+
Input voltage range
Power dissipation
-0.3V to V +0.3V
600 mW
Operating temperature range PA, PB, SA, SB package
DA, DB package
Storage temperature range
Lead temperature, 10 seconds
0°C to + 70°C
-55°C to +125°C
-65°C to +150°C
+260°C
OPERATING ELECTRICAL CHARACTERISTICS
o
+
T = 25 C V = +5V unless otherwise specified
A
Parameter
Symbol
Min
Typ
Max
Unit
Test Conditions
+
Supply Voltage
V
2
12
V
Supply Current ALD1502
Supply Current ALD2502
I
I
50
100
90
180
µA
µA
Outputs Unloaded
S
S
Timing error / Astable mode
Initial Accuracy
t
err
1.0
2.2
%
C = 0.1µF
Drift with Temperature 1
Drift with Supply Voltage1
∆t/∆T
∆t/∆V
10.0
0.2
ppm/°C
%/V
R
= 1KΩ
R = 1KΩ
B
A
+
Threshold Voltage
Trigger Voltage
V
3.233
1.567
3.333
1.667
.01
3.433
1.767
0.4
V
TH
V
I
V
TRIG
Trigger Current 2
nA
V
TRIG
Reset Voltage
V
0.4
0.7
1.0
RST
Reset Current 2
I
.01
0.4
nA
nA
V
RST
Threshold Current2
Control Voltage Level
Output Voltage Drop (Low)
Output Voltage Drop (High)
Rise Time of Output 1
Fall Time of Output1
I
.01
0.4
TH
V
V
V
3.233
4.2
3.333
0.2
3.433
0.4
CONT
OL
V
I
I
= 10mA
SINK
SOURCE
= 10MΩ
4.6
V
= -2mA
OH
t
r
10
20
20
ns
ns
nA
R
L
t
f
10
C = 10pF
L
Discharge Transistor
Leakage Current
I
.01
DL
Discharge Voltage Drop
V
0.5
0.2
1.0
0.4
V
V
I
I
= 80mA
= 30mA
DISC
DISCHARGE
DISCHARGE
Maximum Frequency
Astable Mode
R
R
B
C
T
= 470Ω
= 200Ω
=100pF
A
f
t
1.5
2.5
50
MHz
ns
MAX
Minimum Trigger Pulse Width1
100
TRIG
1
Notes:
Sample tested parameters.
2 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
MINIMUM PULSE WIDTH
REQUIRED FOR TRIGGERING
100
800
+
V
= 12V
+
V
= 5V
50
T
= 25°C
A
700
600
500
T
= 25°C
A
20
10
+
V
= 2V
+
+
V
= 2V
5.0
400
300
200
V = 5V
+
2.0
1.0
0.5
0.2
0.1
V
=12V
100
0
0.01
0.02
0.05
0.1
0.2
0.5
1.0
10
20
30
40
0
DISCHARGE LOW VOLTAGE (V)
LOWEST VOLTAGE LEVEL OF TRIGGER
PULSE ( % V
)
DD
FREE RUNNING FREQUENCY AS
A FUNCTION OF R , R AND C
FREQUENCY CHANGE IN THE ASTABLE
MODE AS A FUNCTION OF SUPPLY VOLTAGE
A
B
10 mF
1 mF
+4
+3
+2
+1
TA = 25°C
(
R - 2R )
A
B
100 µF
10 µF
1 µF
1K
Ω
10K
100K
0
Ω
-1
100 nF
10 nF
1M
Ω
Ω
10M
100M
-2
-3
-4
Ω
1 nF
Ω
100 pF
0
6
2
4
8
10
12
0.1 1.0 10 100 1K
100K 1M 10M 100M
10K
FREQUENCY (Hz)
SUPPLY VOLTAGE (V)
SUPPLY CURRENT AS A FUNCTION OF
SUPPLY VOLTAGE
TIME DELAY IN THE MONOSTABLE MODE
AS A FUNCTION OF R AND C
A
10 mF
1 mF
100
T
= 25°C
90
80
70
60
50
A
R
A
100 µF
10 µF
1 µF
T
A
T
A
T
A
= - 40°C
= + 20°C
= + 85°C
Ω
Ω
1K
Ω
10K
100K
Ω
1M
40
30
100 nF
10 nF
20
Ω
1G
1 nF
10
0
100 pF
2
4
6
8
10
12
0
100ns 1µs 10µs 100µs 1ms 10ms 100ms 1s 10s 100s
SUPPLY VOLTAGE (V)
TIME DELAY
ALD1502/ALD2502
Advanced Linear Devices
3
TYPICAL PERFORMANCE CHARACTERISTICS
OUTPUT SOURCE CURRENT AS A
FUNCTION OF OUTPUT VOLTAGE
OUTPUT SINK CURRENT AS A
FUNCTION OF OUTPUT VOLTAGE
-0.1
-0.2
100
50
+
V
V
V
= 2V
= 5V
= 12V
T
= 25°C
A
+
V
= 5V
+
+
+
V
= 12V
20
10
-0.5
-1.0
-2.0
-5.0
5.0
+
= 2V
V
2.0
1.0
0.5
-10
-20
-50
0.2
0.1
-100
-0.5
-0.2
-0.1
-0.05 -0.02
-0.01
-1.0
0.01
0.02
0.05
0.1
0.2
0.5
1.0
OUTPUT VOLTAGE (V)
(REFERENCED TO V )
OUTPUT VOLTAGE (V)
+
TYPICAL APPLICATIONS ( EACH TIMER )
ASTABLE MODE OPERATION
(FREE RUNNING OSCILLATOR)
ASTABLE MODE OPERATION
50% DUTY CYCLE
V+
V+
1
2
3
4
8
7
6
5
1
2
3
4
8
7
R
A
0.1µF
0.1µF
R
B
R
6
5
V+
V+
C
C
Frequency f = 1/ (1.4 R
)
C
Frequency f = 1.46 / (R + 2R )C
A
B
Duty Cycle DC = R / (R + 2R )
B
A
B
MONOSTABLE MODE OPERATION (ONE SHOT PULSE)
Pulse Delay td = 1.1 RC
V+
1
2
3
4
8
7
6
5
0.1µF
R
C
TRIGGER
INPUT
DELAYED PULSE
OUTPUT
RESET
ALD1502/ALD2502
Advanced Linear Devices
4
相关型号：
©2020 ICPDF网 联系我们和版权申明