NE580 Datasheet PDF - Signetics

www.Datasheet-PDF.com

NE580
Signetics

Part Number NE580
Description Bar Graph Logic Circuit
Page 4 Pages


NE580 datasheet pdf
View PDF for PC
NE580 pdf
View PDF for Mobile


No Preview Available !

NE58O-F,N
DESCRIPTION
FEATURES
T h e N E 5 8 0i s a d u a l b a r - g r a p hl o g i cc i r c u i t a Dual channeldevice
designedto provideallthe functionsneces_- a Easilyexpandableto handlemore chan-
sary to drive a gas dischargeself-scan"") nels.
b a r - g r a p hp a n e l .T h e N E 5 8 0i s c o n l i g u r e d o Single5 volt supply
to drivea 201elementbar-graphin either5 a 3, 5 or 6 phaseoperation
or 6 phaseoperation.Phasenumberselec- a Can be custom maskedtor dltferenl cath-
t i o n i s o b t a i n e db y a p p l y i n ga l o g i c0 o r 1
ode segmentcounts,(maximum240)
levelto the phaseselectpin.3 phaseopera-
Equivalent8-bit resolutionol displayed
t i o nf o r a 1 0 1e l e m e n t d e v i c e c abne a t t a i n e d intormalion.
by a wire-orconnectionof adjacentcathode Overrangeindicaiionoutpuls.
phaseoutputs.
The deviceinputsacceptan analogvoltage
in the range0 to 2.5Vand performsan A/D
conversionwith relerenceto a fixed input
voltageat the referenceterminal.On-chip
f u n c t i o n si n c l u d ea c l o c k g e n e r a t o rl,i n e a r
r a m p g e n e r a t o r ,c o n t r o l l o g i c a n d R O M
decoding.Output functions comprise 2
a n o d ec o n t r o ll i n e s ,2 o v e r r a n g ei n d i c a t i o n
outputs, 6 cathode phase outputs and 1
cathode resetoutput.Referto the system
b l o c kd i a g r a mf o r c l a r i f i c a t i o n '
A m i n i m u m o f e x t e r n a lc o m p o n e n t sa r e
r e o u i r e df o r t h e w h o l ec o n v e r s i o na n d d i s -
play system shown in the typical appli-
cation. The NE5B0can be exoanded to
handle more analog channelsusing ex-
ternal comparators. Either LM3934 or
LM339A type comparators will function
well.A fewexternal ow-costlogicpackages
can in additionprovidebinary or BCD
encoded data to interface with a looic
controlsystem.
T h e d e v i c ei s s u p p l i e di n a 2 2 - p i np l a s t i c
m o l d e do r c e r a m i cd u a l - i n - l i n ep a c k a g e .
O - s e l F s c a n i s a t r a d e m a r ko f B u r r o u g h sC o r p o r a t i o n .
ABSoLUTE MAXTMUM RATTNGs
PARAMETER
S u p p l yv o l t a g e V, 6 6
Output voltage(alloutputs)
A n a l o gi n p u tv o l t a g er a n g e
R e f e r e n c ev o l t a g e i n p u t
P h a s es e l e c t i n p u t
A n a l o g / d i g i t agl r o u n dv o l t a g e
differential
Powerdissipation
plastic
c e r di p '
O p e r a t i n gt e r n p e r a t u r er a n g e
S t o r a g et e m p e r a t u r er a n g e
S o l d e r i n gt e m p e r a t u r e
(l osec)
PINCONFIGURATION
F.N PACKAGE
PHASE 2
P H A S E1
5/6 SEL.
TIMINGCAP
vcc
S+ H CAP,
vnrr
s +H C P.
RATP CAP,
IIVPUTA
INPUTA
PHASE 3
PHASEiI
PHASE 5
P H A S E6
DIG,GND
RESET
O U T P U TA
OUTPUTB
O V E R . R A N G EA
O V E R , R A N G EA
at{a. Gt{o
ORD€RING INFORMATION
P l a s t r cD I L p a c k a g e - N E 5 8 0 N
Cerdip package-NE580F
RATING
L7
*Vcc
-0,3to +7
*Vcc
+5.5
+0.3
500
800
0 to+50
-65to+150
300
UNIT
mW
mw
.NOTE
The plastic 22 pin packagehas a thermal impedance0rn of 120'C/W and the cerdip
package,{!A ol 75"C/W. Provided the maximum junction tempefatureis kepl below
150'C then more power may be disslpatedto a maximum of 1 watt
Ei$illtitls



No Preview Available !

D C E L E C T R I C A L C H A R A C T E R I S T I C S T n- 2 5 ' C ,V c c- 5 Vu n l e s so t h e r w i ssep e c i f i e d
PARAMETER
V6r
VRer
leRer
Ire
Vour (t)
lour (t)
lout (sc)
Vour (o)
Fc
A c c ur a c y
O p e r a t i n gs u p p l yv o l t a g e
range
I n p u tv o l t a g er a n g e
Applied referencevoltagel
B i a sc u r r e n ta t
r e f e r e n c ev o l t a g e i n p u l
B i a sc u r r e n ta t
a n a l o gi n p u t
All outputs2
All outputs2
All outputs2
All outputs
Clockgenerator
frequency
l c c S u p p l yc u r r e n t
Vp:r - 2.5V
Vnrr .. 2.5V
Vr'r - 0V
lour - 500pA
Vout - 1 5V
Vour - 0v
l:;rnr 1.6mA
T i n ' l i n gc a p a c r t o r
" .O22uF
2y .,::rrtggp:. 2.5V
Vrru VRrr
NOTES
1 DrspiayedaccuracyrsafunctronolreferencrevollageValuosolVHLrbel(,w2voltswil
imoair converston accuracv
2 All logic outputs compnse an NPN iransrstor with 3kl) pull up resistor to 5 !olls
BLOCKDIAGRAM
-'-t
Min
4.75
0
0
LIMITS
Tvp
3_U
500
500
3.5
1.0
t3
25
11
50
ffiF
NE5BO-F,N
Max
5.25
2.5
2.5
UNIT
nA
nA
mA
mA
o.4
KHz
bar
mA
I
su]rfiirls



No Preview Available !

TIMINGDIAGRAM
T Y P I C A LA P P L I C A T I O N
JI-II_IL
_n_n_[
_fl_n_n
nnr
nn
NOTES
Rr
R:
R3
Cr'
C? '
C.r =
14Kl)
14Kf)
' tM 1 )
O.A2Z4F
Q47pF
O47rF
Schematic shown rs for a dual 5 phase 200 element batrgraph
EiIil!tiEE



No Preview Available !

B A R - G R A P HS Y S T E M
t h e a n o d e i s o n . F i g u r e 2 i l l u s t r a t e st h e Becausethe ramp is the resultof accumu-
OPERATION
T h eb a r - g r a p hd i s p l a yi sa t h i c k - ifl mp l a n a r ,
gasdischargedevice.The principalof oper-
a t i o ni s c a l l e ds e l f - s c a n ( Ii2n w h i c ha n e o n
glow-dischargeis propagated from one
cathodespot to anotherunder one anode.
The bar-graphdeviceappearsas a seriesof
r e l a t i v eo u t p u t p h a s i n go f t h e l i n e a rr a m p
c a t h o d ea n d a n o d el i n e sf o r 5 p h a s eo p e r a -
tion.
C I R C U I TO P E R A T I O N
T h e N E 5 8 0p r o v i d e st h e c i r c u i t r yt o g e n e r -
a t ea l l t h e s es i g n a l st o t h e p o i n tw h e r et h e y
l a t e dc h a r g eo n t h e i n t e g r a t i ncga p a c i t o ri,t
i s i n h e r e n t l ym o n o t o n i ct;h u s ,e a c hs t e p i s
greaterthanthe previousone by theexpres-
sion
\A
_\v
U
cathodebarsarrangedin a column.A glow
d i s c h a r g ei s c o n t i n u a l l yp r o p a g a t e da l o n g
thecolumnf roma keep-alivecathodeat one
d r i v et h e h i g hv o l t a g ed i s p l a ye l e m e n t sA. n
o n - c h i pc l o c k g e n e r a t o rd r i v e st h e m a s t e r
Errorsin the ramDcan occur due to
counterand cathodephasegenerator.
.1)Starting the ramp from a voltage other
end. Providedthe scan rate for a whole
c o l u m n i s a b o v et h e e y e f l i c k e rd e t e c t i o n
rate,thenthe glow appearsas a continuous
c o l u m no f l i g h t .
B A R - G R A P HS I G N A L
REOUIREMENTS
TheNE580comprisesmostof the electronic
componentsnecessaryto interfacean ana-
The clock also gates a constantcurrent
s o u r c ew h i c h c h a r g e st h e r a m p c a p a c i t o r
with a staircasewaveformof equal incre-
ment steps.These stepscorrespondto the
cathodesegments.Thereare two stepsper
s e g m e n ts o t h a t t h e c o m p a r i s o no f i n p u t
voltagewith respectto the ramp is madeat
t h e m i d - p o i n to f e a c hs e g m e n tT. h em a s l e r
counter inhibitsthe currentsource and
than zero. Some capacitorshavea time
r e l a t e dp o l a r i z a t i o n .
2) Sag in the sampledand hold ramp volt-
a g e c a u s r n ga n i n c o n s t a ncth a r g i n gc u r -
renI.
3) Offseterrorsin the samolsand hold am-
p l i fi e r .
4 ) L e a k a g ec u r r e n t si n t oo r o u t o f t h e r a m p
capacitor.
log voltagelevelto the bar-graphdisplay. discharges the ramp after 200 cathode The zerostartingpoint is achievedby using
Each column of the display requires an c o u n t s A. t t h e2 0 0 t hc o u n t ,t h er a m pv o l t a g e a verylow offsettransistorto fullydischarge
anode control signal and each cathode i ss t r o b e di n t oa s a m p l e - a n d - h oal dm p l i f i e r . t h e r a m p c a p a c i t o rt o w i t h i n 1 - 5 m V o f
( u s u a l l yf r o m 4 t o 7 i n n u m b e r )r e q u i r e sa n Thisvoltageis comparedwith the reference g r o u n d .T h e m a x i m u mv o l t a g ee n d o f t h e
i n t e r l a c e dl o g i c s i g n a l o f 1 / N d u t y c y c l e v o l t a g ea n d a s i g n a lf e d b a c k t o t h e r a m p r a m pi s m a d es t a b l eb y u s i n ga l a r g ev a l u e
(whereN is the numbero1cathodephases). c o n s t a n tc u r r e n ts o u r c e .H e n c e ,t h e m a x i - capacilor to overcomethe efiects of any
T h e p u l s ew i d t ho f e a c hc a t h o d es i g n a li so f m u m v a l u eo f t h e r a m pw i l l b e a d j u s t e dt o leakage.
the order of 50 to .100psT. he cathodesig- the same levelas the referencevoltage.
T h e c l a s s i c a lh i s t o g r a mh a s c e l l s w h i c h
n a l s c l o c k c o n t i n u o u s l yt h r o u g h o u l t h e T h ea n o d eo u t p u tg o e sl o w a t t h eb e g i n n i n g r e p r e s e nat n o m i n a lv a l u e p l u s / m i n u s1 i 2
t r a m ep e r i o d .T h e a n o d es i g n a li s o n o n l y o f e a c hfr a m ea n dg o e sh i g ha g a i nw h e nt h e c e l l w i d t h .T h e N E 5 B 0w o r k s i n t h e s a m e
for a proportionof time correspondingto ramp voltage becomes greater than the way. This is realizedby havinga clock rate
the inpuivoltage.
i n p u tv o l t a g el.f t h e r a m pr e a c h e s{ u l ls c a l e w h i c h i s t w i c et h e c a t h o d es w i t c h i n gr a t e ,
Thus
Vrr.r=Vnerxffi
b e f o r es e t t i n gt h e a n o d eo u t p u th i g h ,t h e n and so the staircaseramphastwo stepsper
the over-rangeoutput goes low and stays cathodedwell time. Eachcomparisonstep
low unti] the end of the next frame if the is made at the nominalcell value plus 1/2
i n p u ts i g n a lr e c o v e r st o a n i n - r a n g ev a l u eA. c e l l ,a n d t h e a n o d er e m a i n so n ( a n o d eo u t -
tor a 200elementdevice,whereTrn is the c o n t i n u i n go v e r - r a n g es i g n a lw i l l c a u s et h e put low) as long as the rampvoltageis less
numberof cathodeclock cvclesfor which o u t p u tt o g o l o w i n d e f i n i t e l y .
thanthe inputvoltage.
4
s!qnEtiEs



NE580 datasheet pdf
Download PDF
NE580 pdf
View PDF for Mobile


Related : Start with NE58 Part Numbers by
NE580 Bar Graph Logic Circuit NE580
Signetics
NE580 pdf
NE58219 NECs NPN SILICON EPITAXIAL TRANSISTOR 3 PINS ULTRA SUPER MINI MOLD NE58219
NEC
NE58219 pdf
NE58633 Noise reduction class-D headphone driver amplifier NE58633
NXP
NE58633 pdf
NE587 LED decoder/driver NE587
Philipss
NE587 pdf
NE587D LED decoder/driver NE587D
Philipss
NE587D pdf
NE587N LED decoder/driver NE587N
Philipss
NE587N pdf

Index :   0   1   2   3   4   5   6   7   8   9   A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z   

This is a individually operated, non profit site. If this site is good enough to show, please introduce this site to others.
Since 2010   ::   HOME   ::   Privacy Policy + Contact