Text preview for : lm2901.pdf part of SGS-Thomson LM2901 Low power quad voltage comparators
Back to : lm2901.pdf | Home
LM2901
LOW POWER QUAD VOLTAGE COMPARATORS
. . . . . . . .
WIDE SINGLE SUPPLY VOLTAGE RANGE OR DUAL SUPPLIES FOR ALL DEVICES : +2V TO +36V OR ±1V TO ±18V VERY LOW SUPPLY CURRENT (1.1mA) INDEPENDENT OF SUPPLY VOLTAGE (1.4mW/comparator at +5V) LOW INPUT BIAS CURRENT : 25nA TYP LOW INPUT OFFSET CURRENT : ±5nA TYP INPUT COMMON-MODE VOLTAGE RANGE INCLUDES GROUND LOW OUTPUT SATURATION VOLTAGE : 250mV TYP. (IO = 4mA) DIFFERENTIAL INPUT VOLTAGE RANGE EQUAL TO THE SUPPLY VOLTAGE TTL, DTL, ECL, MOS, CMOS COMPATIBLE OUTPUTS
N DIP14 (Plastic Package)
D SO14 (Plastic Micropackage)
DESCRIPTION This device consists of four independent precision voltage comparators. All these comparators were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible. These comparators also have a unique characteristic in the fact that the input common-mode voltage range includes ground even though operated from a single power supply voltage. PIN CONNECTIONS (top view)
ORDER CODES
Part Number LM2901
Example : LM2901D
Temperature Range -40, +125 C
o
Package N · D ·
Output 2 1
Output 1 2
14
13 12 11 10
9
8
Output 3 Output 4
V + 3 CC
Invertinginput 1 4 Non-inverting input 1 5 Inverting input 2 6
Non-inverting input 2 7
VCCNon-inverting input 4
Inverting input 4
Non-inverting input 3 Inverting input 3
November 1995
1/9
LM2901
SCHEMATIC DIAGRAM (1/4 LM901)
VCC
3.5µA
100µA
3.5µA
100µA
Non-inverting Input VO Inverting Input
VCC
ABSOLUTE MAXIMUM RATINGS
Symbol VCC Vid VI Ptot Toper Tstg Supply Voltage Differential Input Voltage Input Voltage Output Short-circuit to Ground - (note 1) Power Dissipation Operating Free-air Temperature Range Storage Temperature Range Parameter Value ±18 to 36 ±36 -0.3 to +36 Infinite 570 -40, +125 -65, +150 mW
o o
Unit V V V
C C
Notes : 1. S hort- cir cui t f r om t he output t o V C C + can cause excessive heat i ng and eventual dest r uct i on. T he maxi mum output cur r ent is appr oxi mat el y 20mA, i ndependent of t he magni tude of V CC + .
2/9
LM2901
ELECTRICAL CHARACTERISTICS VCC+ = +5V, VCC- = GND, Tamb = 25oC (unless otherwise specified)
Symbol Vio Input Offset Voltage (note 2) o T amb = +25 C T min. Tamb Tmax. Input Offset Current o T amb = +25 C T min. Tamb Tmax. Input Bias Current (II or II ) - (note 3) o T amb = +25 C T min. Tamb Tmax. Large Signal Voltage Gain (VCC = 15V, RL =15k, VO = 1 to 11V) Supply Current (all comparators) VCC = +5V, no load VCC = +30V, no load Input Common Mode Voltage Range - (note 4) (VCC = 30V) o T amb = +25 C T min. Tamb Tmax. Differential Input Voltage - (note 6) Low Level Output Voltage (Vid = -1V, Isink = 4mA) T amb = +25oC T min. Tamb Tmax. High Level Output Current ( Vid = 1V) (VCC = VO = 30V) T amb = +25oC T min. Tamb Tmax. Output Sink Current (Vid = -1V, VO = 1.5V) Response Time (note 5) + (R L = 5.1k connected to VCC ) 6 25
+
Parameter
Min.
Typ. 1
Max. 7 15
Unit mV
Iio
nA 5 50 150 nA 25 250 400 V/mV 200 mA 1.1 1.3 2 2.5 V 0 0 VCC 1.5 VCC+ -2 VCC+ V mV 250 400 700
+
Iib
Avd ICC
Vicm
Vid VOL
IOH
0.1 1 16 1.3
nA µA mA µs
Isink tre
Notes :
2. A t out put sw it ch poi nt, VO 1. 4V , R S = 0 wi th VC C + from 5V t o 30V, and over the full i nput common- mode r ange (0V t o V C C + 1.5V) . 3. The di rect ion of the i nput curr ent i s out of t he IC due t o t he P N P i nput stage. This cur r ent is essent i al ly constant , i ndependent of the st ate of t he out put , so no loading char ge exi st s on t he reference of input l ines. 4. The i nput common-mode vol t age of ei ther input si gnal volt age should not be al low ed t o go negati ve by more than 0.3V. T he upper end of the common- mode volt age r ange i s VC C + 1. 5V, but ei ther or both i nput s can go to +30V w i thout damage. 5. The r esponse t ime speci fi ed i s f or a 100mV input st ep w i th 5mV overdri ve. For lar ger over dri ve signal s 300ns can be obt ained. 6. P osi t i ve excur si ons of i nput vol tage may exceed the power suppl y level . As long as the ot her vol t age r emai ns wi t hi n the common- mode range, the comparat or w i ll provide a pr oper output st at e. T he low input vol tage stat e must not be l ess than 0.3V ( or 0.3V bel low t he negat ive pow er supply, i f used) .
3/9
LM2901
SUPPLY CURRENT versus SUPPLY VOLTAGE
1 SUPPLYCURRENT (mA) 0.8 0.6
T amb = +70°C
INPUT CURRENT versus SUPPLY VOLTAGE
80 Vi = 0V INPUT CURRENT (nA) 60 40 20 Tamb = +125°C Tamb = +70°C 40 0 10 20 30 SUPPLY VOLTAGE (V) 40 R i = 10 Tamb = 0°C Tamb = +25°C
9
Tamb = -55°C Tamb = 0°C
T = +25°C
Tamb = -55°C
0.4
Tamb = +125°C
0.2
RL =
0
10 20 30 SUPPLY VOLTAGE (V)
OUTPUT SATURATION VOLTAGE versus OUTPUT CURRENT
10 10 10 10 10
1
RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES - NEGATIVE TRANSITION
OUTPUT VOLTAGE (V)
SATURATION VOLTAGE(V)
Out of saturation
0
Tamb = +125°C
-1
-2
Tamb = +25°C
-3 -2 -1 0 1 2
INPUT VOLTAGE (mV)
Tamb = -55°C
6 5 4 3 2 1 0 0 -50 -100
Input overdrive : 5mV 20mV
e
5V
5.1k
I
eo
100mV
T amb = +25°C 0 0.5 1 1.5 TIME (µs) 2
10
10
10
10
10
OUTPUT SINK CURRENT (mA)
RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES - POSITIVE TRANSITION
OUTPUT VOLTAGE(V)
INPUT VOLTAGE(mV)
6 Input overdrive : 100mV 5 4 5mV 3 2 20mV 1 0 100 Tamb = +25°C 50 0 0 0.5 1 1.5 TIME (µs)
5V
5. 1k e
I
eo
2
4/9
LM2901
TYPICAL APPLICATIONS BASIC COMPARATOR DRIVING CMOS
V = 5V CC 15k +V (ref) -V (ref)
+V(ref) 1/4 LM2901
5V
100k
VO
1/4 LM2901
&
-V(ref)
DRIVING TTL
LOW FREQUENCY OP AMP
5V
1/4 LM2901
5V 15k
10k
+V (ref)
-V (ref)
1/4 LM2901
& &
~
eI 100k 1k AV =100
eo
0.5µF
LOW FREQUENCY OP AMP
(eo =0Vfor eI =0V)
TRANSDUCER AMPLIFIER
5V
5V
Magneticpick-up
15k
1/4 LM2901
10k
3k
2N2222
0.5µF
~ eI
1/4 LM2901
eo
20M
100k 1k
AV =100
eo
10k
5/9
LM2901
TYPICAL APPLICATIONS (continued) TIME DELAY GENERATOR
V = +15V CC
10k 15k 200k 10M 10k 3k
V 3
LM 2901
1/4
V CC V O3
t0
3k
t3
10k
51k
LM 2901
1/4
10M 10k
1/4 CC V V O2
V CC
V C1 V 2
0.001µ F
0t O
tA
V (ref.)
LM 2901
t0 t2
INPUTGATINGSIGNAL
V CC
51k 10k
3k 10M
1/4
V 3 VV C1 2 V 1
0 t0 t1 t2 t3 t4 t
LM 2901
V 1
51k
V V O1 CC
t0 t1
LOW FREQUENCY OP AMP WITH OFFSET ADJUST
5V Offset A djust
R2
ZERO CROSSING DETECTOR (single power supply)
5V
5V
100k 1M
15k
1M
Rs
eI ~
RI
1/4
eI
2N2222
5.1k
100k 5.1k 1N4148
100k
1/4 LM2901
5.1k
LM 2901
0.5µF
R1 100k 1k eo
20M 10k
6/9
LM2901
TYPICAL APPLICATIONS (continued) TWO-DECADE HIGH-FREQUENCY VCO
V CC
100k
100k
V CC
3k
500pF
10k 0.1µ F 20k
1/4 LM2901
3k
Frequencycontrol voltageinput v control
50k
5.1k
0.01µ F
1/4 LM2901
Output 1 Output 2
V /2 CC
20k
1/4 LM2901
V /2 CC
V =+30V CC +250mV V control +50V 700Hz fo 100kHz
LIMIT COMPARATOR
VCC (12V)
CRYSTAL CONTROLLED OSCILLATOR
V =15V CC
200k 100k
Lamp
2RS V(ref)
high
10k
1/4 LM2901
2k
V CC
0.1µ F
1/4 LM2901
RS eI ~ 2RS V(ref) low
eo
0
1/4 LM2901
f = 100kHz
2N2222
200k
SPLIT-SUPPLY APPLICATIONS ZERO CROSSING DETECTOR
COMPARATOR WITH A NEGATIVE REFERENCE
15V
15V
5.1k 1/4 LM2901
~
5.1k 1/4 LM2901
~
eI
eo
eI
eo
5V 15V 15V
7/9
LM2901
PACKAGE MECHANICAL DATA 14 PINS - PLASTIC DIP OR CERDIP
Dimensions a1 B b b1 D E e e3 F i L Z
Min. 0.51 1.39
Millimeters Typ.
Max. 1.65
Min. 0.020 0.055
Inches Typ.
Max. 0.065
0.5 0.25 20 8.5 2.54 15.24 7.1 5.1 3.3 1.27 2.54 0.050
0.020 0.010 0.787 0.335 0.100 0.600 0.280 0.201 0.130 0.100
8/9
LM2901
PACKAGE MECHANICAL DATA 14 PINS - PLASTIC MICROPACKAGE (SO)
Dimensions A a1 a2 b b1 C c1 D E e e3 F G L M S
Min. 0.1 0.35 0.19
Millimeters Typ.
Max. 1.75 0.2 1.6 0.46 0.25 45 (typ.)
o
Min. 0.004 0.014 0.007
Inches Typ.
Max. 0.069 0.008 0.063 0.018 0.010
0.5 8.55 5.8 1.27 7.62 3.8 4.6 0.5 4.0 5.3 1.27 0.68 8 (max.)
o
0.020 8.75 6.2 0.336 0.228 0.050 0.300 0.150 0.181 0.020 0.157 0.208 0.050 0.027 0.334 0.244
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change witho ut notice. This pub lication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not author ized for use as critical componen ts in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. © 1995 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
9/9