SolidStcte
Migrollechnologry
for Music
DUAL TINEAR-ANTILOG VOTTAGE CONTROLTED AMPLIFIER
D E S C R I P T I O N
T h e S S M 2 O 2 O is a d u a l t w o q u a d r a n t m u l t i p l i e r d e s i g n e d t o b e u s e d w i t h o p a m p s i n a w i d e v a r i e t y o f p r e c i s i o n a u d i - f r e q u e n c y a p p l i c a t i o n s i n c l u d i n g A G C c i r c u i t s , D i v i d e r s a n d a s a B i q u a d t u n i n g e l e m e n t . E a c h c h a n n e l h a s s e p a r a t e c o n t r o l a n d d i f f e r e n t i a l s i g - n a l i n p u t s a n d a c u r r e n t o u t p u t . T h e d e v i c e o f f e r s a n e x c e p t i o n a l l y fl e x i b l e c o n t r o l c i r c u i t f o r e a c h c h a n n e l w h i c h a l l o w s s i m u l - t a n e o u s li n e a r a n d e x p o n e n t i a l v o l t a g e c o n t r o l o f g a i n o r e i t h e r p o l a r l t y o f c u r r e n t c o n t r o l . B o t h c h a n n e l s a r e f u l l y t e m p e r a t u r e c o m p e n s a t e d a n d h a v e 8 6 d B s i q n a l - t o - n o i s e r a t i o s a t l e s s t h a n 0 . 1 % d i s t o r t r o n
S 2 SM
o20
F E A T U R E S
r M a x S u p p l i e s t 1 B V
r D u a l D e s i q n ( l n d e p e n d e n t C o n t r o l S e l e c t i o n ) t
t 2% Channel G a i n M a t c h i n q r
r 1 0 0 d B C o n t r o l R a n g e r
r S i m u l t a n e o u s L i n e a r a n d E x p o n e n t i a l G a i n C o n t r o l r r D i f f e r e n t i a l S i g n a l I n p u t s r
I C u r r e n t O u t o u t I
r B 6 d b S i g n a l - t o - N o i s e r
. O . 1 % D i s t o r t l o n I
r Fully Temperature C o m p e n s a t e d !
A P P L I C A T I O N S
I
2 a n d 4 O u a d r a n t M u l t i p l i e r s D iv i d e r s
A G C C i r c u i t s V o l t a g e C o n t r o l l e d V o l t a g e C o n t r o l l e d V o l u m e C o n t r o l s E q u a l i z e r s C o m p a n d o r s A n t i l o g A m p l i f i e r s V o l t a g e C o n t r o l l e d
F i l t e r s
O u a d r a t u r e O s c i I la t o r s
C u r r e n t S o u r c e s
I \-_-/ 16
2 1 5
t t o
4 1 3
5 1 2
6 1 1
7 t o 8 9 1 O L I T 1 - S I G I N 1 + S I G I N 1 - C O N E A S E
1 C O N E M I T 1 + C O N E A S E 1 C O N C O L L
+ V 2 O U T 2 _ S I G I N 2 + S I G I N 2 _ C O N B A S E 2 C O N E M I T 2 + C O N B A S E 2 C O N C O L L
C U R R E N I M I B R O R S
l r u l
--->
I S I G N A T I N P U T
S I G N A L I N P U T
C O N T R O L C O L L E C T O R
C U R R E N T M I R R O R
r C O N T R O L B A S E
_ C O N T R O L B A S E
C O N T R O L E M I T T E R I W O Q U A D R A N T T R A N S C O N D U C T A N C E M U L T I P L I E R
Equivalent Schematic (One Side)
S o l i d S t a t e M i c r o T e c h n o l o g y f o r M u s i c , 2 O 7 6 8 W a l s h A v e n u e , S a n r a Clara. CA 95050_ USA ( 4 0 8 1 2 4 8 - 0 9 1 7 T e l e x 1 7 1 1 8 9
S P E C I F I C A T I O N S
V S = t 1 5 V , l c 1 = 1 " 2 = 5 0 0 p A a n d T A = 2 5 " C , u n l e s s o t h e r w i s e s p e c i f i e d .
* O u t p u t
a t V i r t u a l G N D
O P E R A T I N G T E M P E R A T U R E
- 2 5 o C t o + 7 5 " C - C o m m e r c i a l -55o C to +125" C - Military
S T O R A G E T E M P E R A T U R E
- 5 5 ' C t o 1 2 5 ' C
P A R A M E T E R S M I N T Y P MAX C O N D I T I O N S
S i g n a l I n p u t B i a s l6 S u p p l y V o l t a g e V , S u p p l y C u r r e n t l , C o n t r o l C u r r e n t
r 6
5 0 0 n A t 1 5 6 m A
2 . 2 1 t 4
: l r l d
8 m A 1 m A
V . . * 3 V ( V * , V _ < V c c - 3 V l c 1 = l c 2 = 1 m A
Transconductance gm
gm match g m T e m c o
1 ll2ksz 1 1 1 4
*2o/o
1 0 0
k { l
p p m / t
' l / 1 6 k s r
!5"/o
l c 1 = l c 2 = 1 m A
C o n t r o l C i r c u i t V o , 1 m V 3 m V
O u t p u t O f f s e t l o l 1 . C o n t r o l R e j e c t i o n
! 2 % 6 0 d B
t " t o % V + = V _ = G N D ( u n t r i m m e d ) 0 ( 1 . ( | m A ( t r i m m e d ) 450 o Resistor
450 o Temp Coef
350 sz 4 5 0 s r
+2000 ppm/"C
5 5 0 o
C h a n n e l S e p a r a t i o n 1 0 0 d B F = ' t k H z
B a n d w i d t h ( 3 d B ) 1 M H z
3 0 0 k H z 3 0 k H z
l . l . l .
= 1 m A *
= 1 0 p A
= 100 nA Feedthrough:
- l n p u t t o O u t p u t + l n p u t t o O u t p u t
9 0 d B 1 0 0 d B
F = i k H z , l " = 0 F - 1 k H z , l " = 0
S i g n a l / N o i s e 8 6 d 8 V s = 6 V p p , l . = 1 m A
D i s t o r t i o n ( T H D ) VCA (OPen LooP) V C F ( C l o s e d L o o p ) As below
O.'1"/o
o . o 2 %
V r = 6 V p p , l . = 1 m A V r = 6 V O O , l . = i m A
Basic Control Circuit 1 ) l o r t = 9 m ( V + - V - ) , _ 1 " ( V + - V - ) ' o u t -
* u o * - V ' q / K T
l . = e ( + V / R . + V . / R . , )
" r e l L L ,
v^ 450s) w h e r e V ^
R t + 4 5 o o
- N O T E : T H E 4 5 0 o R E S I S T O R S A R E I N T E R N A L T O T H E l . C . A N D C O M P E N S A T E F O R T H E T F A C T O R I N T H E E X P O N E N T .
U
6
o z
; (,
o
I
:
zo
6o
o 0 2 5
o 2 0
0 1 5
0 . 1 0
0 0 5
8 5 d b
7 5 d b
6 s d b
5 5 d b
4 5 d b
3 5 d b
2 V 4 V 6 V 8 V
S I G N A L I N P U T ( P E A K T O P E A K )
Dirtortion vs Signal Input
t o v 1 m A ' t O O u A 1 0 u A 1 u A 1 O O n A 1 0 n A
C O N T R O L C U R R E N T
Signal Noise vs Control Current (6 Vpp ;n)
H I G H
P A S S
i
I l .
E A N D
P A S S
I
r lI c l
2 4 V i n
1 5 M
a" 1
+ 1 5 V
e
VCF Design Equations R = 1 5 K , R u C o o = 1 R = 2 8 K @ l = 5 0 0 u A R o = ( 2 o - t ) n
A = 2 - 1 l o 5 0 n A ( l a ( 5 0 0 u A
R a = 1 / g m = 1 4 V l l c Also see equ. 3, Page 2
% ssM2020
LOW PASS
N O T C H ( O P T I O N A L )
Voltage Controlled Filter (10,000 to 1 Sweep)
I I 8Op{
O F F S E T A N D C O N T R O L R E J E C T I O N T R I M
5OrK
7, SSM2020
l l
l "
V
VCA Design Equations
V o r t = l " V . n 1 5 K / 1 4 V o l t s t c = ( + v / R r e f + v L / R 1 ) e - v b q / K T Vb = Ve 450e / (R., + 459e ;
V b
3 . 3 K 1 O O p f
V
r----4/\/Wg--l
I r s K R L v
Voltage Control led Ampl if ier 3 . 3 K
t N 9 1 4
A U D I O I N P U T
1 5 0 p f
' / , 2 0 2 0
A U D I O V C A
O F F S E T A D J
O U T 22K
A D J U S T T O L F O P E A K I N P U T
1 4
L F O I N P U T
r 0 K
L F O A M O U N T C O N T R O L
A D S R I N P U T
A s i n g l e 2 O 2 O c a n b e c o n n e c t e d to a d d t r e m e l l o t o t h e o u t p u t e n v e l o p e o f a V C A T r e m e l l o d e p t h c a n b e c o n t r o l l e d f r o m 0 t o 1 0 0 % . T h e a d i u s t m e n t p r o c e d u r e is t o a p p l y a n a u d i o i n p u t t o t h e V C A , t u r n t h e L F O a m o u n t c o n t r o l a l l t h e w a y o n a n d g a t e a n d h o l d o n t h e A D S R . T r i m p o t P , i s t h e n a d j u s t e d to g i v e 1 0 0 % m o d u l a t i o n a t t h e V C A o u t p u t . T h e V C A o f f s e t r r i m p o t P , , i s t h e n a d . i u s t e d t o c e n t e r th e V C A o u t p u t a b o u t g r o u n d .
O % L F O M O D U L A T I O N
VCA Control Envelopes
3 0 % L F O M O D U L A T I O N 1 O O % L F O M O D U L A T I O N
+ B u f f e r required if driving 6.8K load from outpur of SSM 2050. Nor needed for SSM 2055.
SoUd State Micro Technologry
for Music v '
S o l i d S t a t e M i c r o T e c h n o l o g y c a n n o t a s s u m e r e s p o n s i b i l i t y f o r u s e o f a n y c i r c u i t r y d e s c r i b e d o t h e r t h a n t h e c i r c u i t r y e n t i r e l y e m b o d i e d i n a n S S M T p r o d u c t . N o o t h e r c i r c u i t l i c e n s e s a r e i m p l i e d . S o l i d S t a t e M i c r o T e c h n o l o g y re s e r v e s t h e r i g h t , a t a n y t i m e w i t h o u t n o t i c e , to c h a n g e s a i d c i r c u i t r y .
