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? 2000 california micro devices corp. all rights reserved. 5/00 215 topaz street, milpitas, california 95035 tel: (408) 263-3214 fax: (408) 263-7846 www.calmicro.com 1 california micro devices cmv1036 micropower rro operational amplifier with shutdown features ? tiny sot23-6 package ? guaranteed specs at 1.8v, 2.2v, 2.7v, 3v and 5v ? less than 1a idle current. ? very low operating supply current typically 150a@3v ? rail-to-rail output ? simple shutdown mode(with logic level control) ? typical total harmonic distortion of 0.02% at 3v ? 2.7mhz typical gain bandwidth product ? 2v/s typical slew rate product description the cmv1036 is a high performance cmos opera- tional amplifier available in a small sot23-6 package. operating with very low supply current, it is ideal for battery operated applications where power, space and weight are critical. performance is similar to camds cmv1030 sot amp, with the addition of a shutdown pin to greatly applications ? mobile communications ? cellular phones ? portable equipment ? notebooks and pdas ? electronic toys c0970500 pin diagram reduce supply current when idle. the shutdown mode is controlled by an extra pin, and is compatible with most logic family signal levels. ideal for use in personal electronics such as cellular handsets, pagers, cordless telephones and other products with limited space and battery power. 1 non-inv input output 6-pin sot23-6 v- 4 2 3 + shutdown - inv input 5 v+ 6 n o i t a m r o f n i g n i r e d r o t r a p d r a d n a t s e g a k c a p r e b m u n t r a p g n i r e d r o s n i pe l y t sl e e r & e p a tg n i k r a m t r a p 66 - 3 2 t o sr / y 6 3 0 1 v m c6 1 0 1
?2000 california micro devices corp. all rights reserved. 5/00 215 topaz street, milpitas, california 95035 tel: (408) 263-3214 fax: (408) 263-7846 www.calmicro.com 2 california micro devices cmv1036 note 1: absolute maximum ratings indicate limits beyond which damage to the device may occur. operating conditions indicate ratings for which the device is intended to be functional, but specific performance is not guaranteed. for guaranteed specifications an d the test conditions, see the electrical operating characteristics. note 2: human body model, 1.5k w in series with 100pf. note 3 : applies to both single-supply and split-supply operation. continuous short ckt operation at elevated ambient temperatures can result in exceeding the maximum allowed junction temperature of 150c. note 4 : the maximum power dissipation is a function of t j (max) , q ja and t a . the maximum allowable power dissipation at any ambient temperature is p d = (t j (max) - t a )/ q ja . all numbers apply for packages soldered directly to a pc board. ) 1 e t o n ( s g n i t a r m u m i x a m e t u l o s b a r e t e m a r a pg n i t a rt i n u ) 2 e t o n , m b h ( n o i t c e t o r p d s e0 0 0 2v e g a t l o v t u p n i l a i t n e r e f f i d/ + - e g a t l o v y l p p u sv n i p t u p t u o / t u p n i t a e g a t l o vv ( , 3 . 0 + ) + v ( - ) - 3 . 0v e g a r o t s : e r u t a r e p m e t ) 4 e t o n ( n o i t c n u j g n i t a r e p o ) s 0 1 , g n i r e d l o s ( d a e l - 0 5 1 o t 5 6 5 2 1 0 6 2 c v o t + v ( e g a t l o v y l p p u s - )5 . 7v n i p t u p n i t a t n e r r u c5a m ) 3 e t o n ( n i p t u p t u o t a t n e r r u c5 1a m s n i p y l p p u s r e w o p t a t n e r r u c5 1a m ) e s i w r e h t o d e i f i c e p s s s e l n u ( s n o i t i d n o c g n i t a r e p o r e t e m a r a pg n i t a rt i n u e g a t l o v y l p p u s7 o t 8 . 1v e r u t a r e p m e t n o i t c n u j - 5 8 o t 0 4 c e c n a t s i s e r l a m r e h t5 2 3w / c
? 2000 california micro devices corp. all rights reserved. 5/00 215 topaz street, milpitas, california 95035 tel: (408) 263-3214 fax: (408) 263-7846 www.calmicro.com 3 california micro devices cmv1036 2s c i t s i r e t c a r a h c g n i t a r e p o l a c i r t c e l e v 2 . m 1 > l r , v 0 = - v , v 2 . 2 = + v , c 5 2 = j t d e i f i c e p s e s i w r e h t o s s e l n u ( w w w w w ) l o b m y sr e t e m a r a ps n o i t i d n o cp y tt i m i lt i n u v s o e g a t l o v t e s f f o t u p n iv t u o v 1 . 1 =9v m i b t n e r r u c s a i b t u p n i 1a p i s o t n e r r u c t e s f f o t u p n i 5 . 0a p r n i e c n a t s i s e r t u p n i 1t w i s t n e r r u c y l p p u sv n o r e i f i l p m a d s v 2 . 2 =5 3 10 7 2a i s t n e r r u c y l p p u sv f f o r e i f i l p m a d s v 0 =1 0 . 01a w b gt c u d o r p h t d i w d n a b n i a g 4 . 2z h m a v n i a g e g a t l o v l a n g i s e g r a lv t u o v 2 o t v 2 . 0 =0 80 6b d r se t a r w e l sa v = - k 0 0 1 = l r , 18 . 15 4 . 0v / s r r s po i t a r n o i t c e j e r y l p p u s r e w o pv 4 . 1 0 t v 1 . 1 = + v v - = - o t v 1 . 1 - v 4 . 1 v 0 = m c v 0 70 5b d r r m co i t a r n o i t c e j e r e d o m n o m m o cv 2 . 1 < m c v < v 00 60 4b d v m c e g n a r t u p n i e d o m n o m m o c 0 5 . 1 v d h tn o i t r o t s i d c i n o m r a h l a t o ta v = - v , z h k 1 = f , 1 t u o p - p v 4 . 1 = k 0 0 1 = l r 2 0 . 0% i c s t n e r r u c t i u c r i c t r o h s t u p t u ok n i s / e c r u o s7a m v o l i a r r e h t i e m o r f g n i w s t u p t u ok 0 1 = l r0 20 5 1v m v h i d s l e v e l c i g o l n o r e i f i l p m an o r e i f i l p m a6 . 1v v l i d s l e v e l c i g o l f f o r e i f i l p m af f o r e i f i l p m a6 . 0v i n i t n e r r u c n i p c i g o lv d s d n g r o + v =1a t n o e m i t n o n r u t 5 1s t f f o e m i t f f o n r u t 1s s c i t s i r e t c a r a h c g n i t a r e p o l a c i r t c e l e v 8 . 1 m 1 > l r , v 0 = - v , v 8 . 1 = + v , c 5 2 = j t d e i f i c e p s e s i w r e h t o s s e l n u ( w w w w w ) l o b m y sr e t e m a r a ps n o i t i d n o cp y tt i m i lt i n u v s o e g a t l o v t e s f f o t u p n iv t u o v 9 . 0 =9v m i b t n e r r u c s a i b t u p n i 1a p i s o t n e r r u c t e s f f o t u p n i 5 . 0a p r n i e c n a t s i s e r t u p n i 1t w i s t n e r r u c y l p p u sv n o r e i f i l p m a d s v 8 . 1 =0 2 10 4 2a i s t n e r r u c y l p p u sv f f o r e i f i l p m a d s v 0 =1 0 . 01a w b gt c u d o r p h t d i w d n a b n i a g 2z h m a v n i a g e g a t l o v l a n g i s e g r a lv t u o v 6 . 1 o t v 2 . 0 =0 80 6b d r se t a r w e l sa v = - k 0 0 1 = l r , 14 . 15 3 . 0v / s r r s po i t a r n o i t c e j e r y l p p u s r e w o pv 2 . 1 0 t v 9 . 0 = + v v - = 9 . 0 - o t v - v 2 . 1 v 0 = m c v 0 70 5b d r r m co i t a r n o i t c e j e r e d o m n o m m o cv 8 . 0 < m c v < v 00 60 4b d v m c e g n a r t u p n i e d o m n o m m o c 0 1 . 1 v d h tn o i t r o t s i d c i n o m r a h l a t o ta v = - v , z h k 1 = f , 1 t u o p - p v 1 = k 0 0 1 = l r 6 2 0 . 0% i c s t n e r r u c t i u c r i c t r o h s t u p t u ok n i s / e c r u o s5a m v o l i a r r e h t i e m o r f g n i w s t u p t u ok 0 1 = l r0 20 5 1v m v h i d s l e v e l c i g o l n o r e i f i l p m an o r e i f i l p m a2 . 1v v l i d s l e v e l c i g o l f f o r e i f i l p m af f o r e i f i l p m a6 . 0v i n i t n e r r u c n i p c i g o lv d s d n g r o + v =1a t n o e m i t n o n r u t 8 1s t f f o e m i t f f o n r u t 1s
?2000 california micro devices corp. all rights reserved. 5/00 215 topaz street, milpitas, california 95035 tel: (408) 263-3214 fax: (408) 263-7846 www.calmicro.com 4 california micro devices cmv1036 s c i t s i r e t c a r a h c g n i t a r e p o l a c i r t c e l e v 7 . 2 m 1 > l r , v 0 = - v , v 7 . 2 = + v , c 5 2 = j t d e i f i c e p s e s i w r e h t o s s e l n u ( w w w w w ) l o b m y sr e t e m a r a ps n o i t i d n o cp y tt i m i lt i n u v s o e g a t l o v t e s f f o t u p n iv t u o v 5 3 . 1 =6v m i b t n e r r u c s a i b t u p n i 1a p i s o t n e r r u c t e s f f o t u p n i 5 . 0a p r n i e c n a t s i s e r t u p n i 1t w i s t n e r r u c y l p p u sv n o r e i f i l p m a d s v 7 . 2 =0 5 10 0 3a i s t n e r r u c y l p p u sv f f o r e i f i l p m a d s v 0 =1 0 . 01a w b gt c u d o r p h t d i w d n a b n i a g 7 . 2z h m a v n i a g e g a t l o v l a n g i s e g r a lv t u o v 5 . 2 o t v 2 . 0 =5 85 6b d r se t a r w e l sa v = - k 0 0 1 = l r , 125 . 0s / v r r s po i t a r n o i t c e j e r y l p p u s r e w o pv 5 6 . 1 o t v 5 3 . 1 = + v v - = - v 5 6 . 1 o t v 5 3 . 1 v 0 = m c v 0 70 5b d r r m co i t a r n o i t c e j e r e d o m n o m m o cv 7 . 1 < m c v < v 00 65 4b d v m c e g n a r t u p n i e d o m n o m m o c 0 2 v d h tn o i t r o t s i d c i n o m r a h l a t o ta v = - v , z h k 1 = f , 1 t u o p - p v 9 . 1 = k 0 0 1 = l r 2 0 . 0% i c s t n e r r u c t i u c r i c t r o h s t u p t u ok n i s / e c r u o s2 1a m v o l i a r r e h t i e m o r f g n i w s t u p t u ok 0 1 = l r0 20 5 1v m v h i d s l e v e l c i g o l n o r e i f i l p m an o r e i f i l p m a2v v l i d s l e v e l c i g o l f f o r e i f i l p m af f o r e i f i l p m a8 . 0v i n i t n e r r u c n i p c i g o lv d s d n g r o + v =1a t n o e m i t n o n r u t 1 1s t f f o e m i t f f o n u t 1s
? 2000 california micro devices corp. all rights reserved. 5/00 215 topaz street, milpitas, california 95035 tel: (408) 263-3214 fax: (408) 263-7846 www.calmicro.com 5 california micro devices cmv1036 s c i t s i r e t c a r a h c g n i t a r e p o l a c i r t c e l e v 3 m 1 > l r , v 0 = - v , v 3 = + v , c 5 2 = j t d e i f i c e p s e s i w r e h t o s s e l n u ( w w w w w ) l o b m y sr e t e m a r a ps n o i t i d n o cp y tt i m i lt i n u v s o e g a t l o v t e s f f o t u p n iv t u o v 5 . 1 =5v m i b t n e r r u c s a i b t u p n i 1a p i s o t n e r r u c t e s f f o t u p n i 5 . 0a p r n i e c n a t s i s e r t u p n i 1t w i s t n e r r u c y l p p u sv n o r e i f i l p m a d s v 3 =0 5 10 0 3a i s t n e r r u c y l p p u sv f f o r e i f i l p m a d s v 0 =1 0 . 01a w b gt c u d o r p h t d i w d n a b n i a g 7 . 2z h m a v n i a g e g a t l o v l a n g i s e g r a lv t u o v 8 . 2 o t v 2 . 0 =5 85 6b d r se t a r w e l sa v = - k 0 0 1 = l r , 125 . 0s / v r r s po i t a r n o i t c e j e r y l p p u s r e w o pv 8 . 1 o t v 5 . 1 = + v v - = - o t v 5 . 1 - v 8 . 1 v 0 = m c v 0 85 5b d r r m co i t a r n o i t c e j e r e d o m n o m m o cv 2 < m c v < v 00 70 5b d v m c e g n a r t u p n i e d o m n o m m o c 0 3 . 2 v d h tn o i t r o t s i d c i n o m r a h l a t o ta v = - v , z h k 1 = f , 1 t u o p - p v 2 = k 0 0 1 = l r 2 0 . 0% i c s t n e r r u c t i u c r i c t r o h s t u p t u ok n i s / e c r u o s5 1a m v o l i a r r e h t i e m o r f g n i w s t u p t u ok 0 1 = l r0 20 5 1v m v h i d s l e v e l c i g o l n o r e i f i l p m an o r e i f i l p m a2 . 2v v l i d s l e v e l c i g o l f f o r e i f i l p m af f o r e i f i l p m a1v i n i t n e r r u c n i p c i g o lv d s d n g r o + v +1a t n o e m i t n o n r u t 9s t f f o e m i t f f o n r u t 1s
?2000 california micro devices corp. all rights reserved. 5/00 215 topaz street, milpitas, california 95035 tel: (408) 263-3214 fax: (408) 263-7846 www.calmicro.com 6 california micro devices cmv1036 s c i t s i r e t c a r a h c g n i t a r e p o l a c i r t c e l e v 5 m 1 > l r , v 0 = - v , v 5 = + v , c 5 2 = j t d e i f i c e p s e s i w r e h t o s s e l n u ( w w w w w ) l o b m y sr e t e m a r a ps n o i t i d n o cp y tt i m i lt i n u v s o e g a t l o v t e s f f o t u p n iv t u o v 5 . 1 =5v m i b t n e r r u c s a i b t u p n i 1a p i s o t n e r r u c t e s f f o t u p n i 5 . 0a p r n i e c n a t s i s e r t u p n i 1t w i s t n e r r u c y l p p u sv n o r e i f i l p m a d s v 5 =0 8 10 6 3a i s t n e r r u c y l p p u sv f f o r e i f i l p m a d s v 0 =1 0 . 01a w b gt c u d o r p h t d i w d n a b n i a g 9 . 2z h m a v n i a g e g a t l o v l a n g i s e g r a lv t u o v 8 . 2 o t v 2 . 0 =0 90 7b d r se t a r w e l sa v = - k 0 0 1 = l r , 13 . 25 7 5 . 0s / v r r s po i t a r n o i t c e j e r y l p p u s r e w o pv 8 . 1 o t v 5 . 1 = + v v - = - o t v 5 . 1 - v 8 . 1 v 0 = m c v 0 85 5b d r r m co i t a r n o i t c e j e r e d o m n o m m o cv 2 < m c v < v 00 70 5b d v m c e g n a r t u p n i e d o m n o m m o c 0 3 . 4 v d h tn o i t r o t s i d c i n o m r a h l a t o ta v = - v , z h k 1 = f , 1 t u o p - p v 2 = k 0 0 1 = l r 2 0 . 0% i c s t n e r r u c t i u c r i c t r o h s t u p t u ok n i s / e c r u o s5 2a m v o l i a r r e h t i e m o r f g n i w s t u p t u ok 0 1 = l r0 20 5 1v m v h i d s l e v e l c i g o l n o r e i f i l p m an o r e i f i l p m a4v v l i d s l e v e l c i g o l f f o r e i f i l p m af f o r e i f i l p m a1v i n i t n e r r u c n i p c i g o lv d s d n g r o + v +1a t n o e m i t n o n r u t 5 . 7s t f f o e m i t f f o n r u t 1s
? 2000 california micro devices corp. all rights reserved. 5/00 215 topaz street, milpitas, california 95035 tel: (408) 263-3214 fax: (408) 263-7846 www.calmicro.com 7 california micro devices cmv1036 r l = 1meg r l = 100k r l = 10k v+ = 5v v- = 0v t a = 25c open loop volta g e gain response frequency(hz) a vol (db) v+ = 5v v- = 0v t a = 25c r l = 1meg r l = 100k r l = 10k open loop phase response frequency(hz) phase (o) v+ = 5v v- = 0v r l = 100k w t a = 25c large signal pulse response time( m s) v out (v) supply current versus supply voltage t a = 85oc t a = 25oc t a = -40oc supply voltage(v) supply current ( m a) non invertin g small si g nal response v+ = 5v v- = 0v t a = 25c r l = 100k r l = 10k time( m s) v out (v) inverting small signal response v+ = 5v v- = 0v t a = 25c r l = 100k r l = 10k time( m s) v out (v)
?2000 california micro devices corp. all rights reserved. 5/00 215 topaz street, milpitas, california 95035 tel: (408) 263-3214 fax: (408) 263-7846 www.calmicro.com 8 california micro devices cmv1036 v s = 2.5v -2.5v < v in < 2v t a = 25c common mode rejection ratio v in (v) v os (mv) v+ = 5v v- = 0v t a = 25c v out is referenced to v+ current sourcing versus v out v out (v) i out v+ = 5v v- = 0v t a = 25c v out is referenced to v- current sinking versus v out v out (v) i out supply voltage(v) supply current (na) disabled supply current versus supply voltage t a = 85oc t a = 25oc t a = -40oc v sd = 0v v- = 0v v+ = 5v v- = 0v r l = 10k w t a = 25c a v = +1 5v disable response for a family of dc inputs time( m s) v out (v) v in = 1v v in = 2v v in = 3v v in = 4v v in = 5v 5v enable response for a family of dc inputs v in = 1v v in = 2v v in = 3v v in = 3.5v v+ = 5v v- = 0v r l = 10k w t a = 25c a v = +1 time( m s) v out (v)
? 2000 california micro devices corp. all rights reserved. 5/00 215 topaz street, milpitas, california 95035 tel: (408) 263-3214 fax: (408) 263-7846 www.calmicro.com 9 california micro devices cmv1036 0 20 40 60 80 100 120 140 160 180 1.8 2.2 2.7 3.3 4 5 turn on time versus supply voltage v in = 0.5*v+ v- = 0v r l = 10k w t a = 25c a v = +1 supply volta g e(v) turn on time + opamp settling time ( m m s)
?2000 california micro devices corp. all rights reserved. 5/00 215 topaz street, milpitas, california 95035 tel: (408) 263-3214 fax: (408) 263-7846 www.calmicro.com 10 california micro devices cmv1036 applications information 1. input common mode range and output voltage considerations the cmv1036 is capable of accommodating an input common mode voltage equal to one volt below the positive rail and all the way to the negative rail. it is also capable of output voltages equal to both power supply rails. voltages that exceed the supply voltages will not cause phase inversion of the output, however, esd diode clamps are provided at the inputs that can be damaged if static currents in excess of 5ma are allowed to flow in them. this can occur when the magnitude of input voltage exceeds the rail by more than 0.3 volt. to preclude damage, an applications resistor, r s , in series with the input is recommended as illustrated in figure 1 whose value for r s is given by: v in C (v+ + 0.3 v) r s > 5 ma for v+ (or vC) equal to 2.2 volts and v in equal to 10 volts, r s should be chosen for a value of 2.5k w or greater. the shutdown pin also provides esd clamp diodes that will be damaged if the signal exceeds the rail by 0.3 volts and should also be limited to <5ma by inserting the appropriate resistor between the input signal or logic gate and the shutdown input. figure 1. 2. output current and power dissipation considerations the cmv1036 is capable of sinking and sourcing output currents in excess of 7ma (v+ = 2.2 volts) at voltages very nearly equal to the rails. as such, it does not have any internal short circuit protection (which would in any event detract from its rail to rail capability). although the power dissipation and junction temperature rise are small, a short analysis is worth investigating. obviously, the worst case from a power dissipation point of view is when the output is shorted to either ground in a single rail application or to the opposite supply voltage in split rail applications. since device only draws 60 m a supply current (100 m a maximum), its contribution to the junction temperature, t j , is negli- gible. as an example, let us analyze a situation in which the cmv1036 is operated from a 5 volt supply and ground, the output is programmed to positive saturation, and the output pin is indefinitely shorted to ground. in general: p diss = (v+ Cv out )*i out + i s *v+ where: p diss = power dissipated by the chip v+ = supply voltage v out = the output voltage i s = supply current the contribution to power dissipation due to supply current is 500 m w and is indeed negligible as stated above. the primary contribution to power dissipation occurs in the output stage. v+ C v out would equal 5vC 0v = 5 v while the short circuit current would be 25ma. the power dissipation would be equal to 125mw. t j = t a + q ja * p diss where: t a = the ambient temperature q ja = the thermal impedance of the package junction to ambient the sot23 exhibits a q ja equal to 325c/w. thus for our example the junction rise would be about 41c which is clearly not a destructive situation even under an ambient temperature of 85c. 3. input impedance considerations the cmv1036 exhibits an input impedance typically in excess of 1 tera w (1 x 10 12 ohms) making it very appropriate for applications involving high source impedance such as photodiodes and high output impedance transducers or long time constant integra- tors. high source impedances usually dictate large feedback resistors. but, the output capacitance of the source in parallel with the input capacitance of the cmv1036 (which is typically 3pf) create a parasitic pole with the feedback resistor which erodes the phase margin of the amplifier. the usual fix is to bypass, r f , as shown in figure 2 with a small capaci- tor to cancel the input pole. the usual formula for calculating c f always results in a value larger than that is required: 1 1 3 2 p r s c s 2 p r f c f since the parasitic capacitance can change between
? 2000 california micro devices corp. all rights reserved. 5/00 215 topaz street, milpitas, california 95035 tel: (408) 263-3214 fax: (408) 263-7846 www.calmicro.com 11 california micro devices cmv1036 the breadboard and the production printed circuit board, we favor the use of a "gimmick" , a technique perfected by tv technicians in the 1950s. a gimmick is made by taking two lengths (typically about a foot) of small gauge wire such as awg 24, twisting them together, and then after baring all ends soldering the gimmick across r f . with the circuit operating, c f is "adjusted" by clipping short lengths of the gimmick off until the compensation is nominal. then simply remove the gimmick, take it to an impedance bridge, and select the capacitor accordingly. figure 2. 4. capacitive load considerations the cmv1036 is capable of driving capacitate loads in excess of 100pf without oscillation. however, signifi- cant peaking will result. probably the easiest way minimize this problem is to use an isolation resistor as shown in figure 3. figure 3 5. power supply decoupling the cmv1036 is not prone to oscillation without the use of power supply decoupling capacitors, however to minimize hum and noise pick-up, it is recommended that the rails be bypassed with 0.01 m f capacitors. 6. turn on and turn off (shut down) characteristics the turn off delay (disable response), t off , is defined as the time between the shut down signal crossing the disable threshold (typically v+ - 1 volt) and the time for the amplifiers output to come within 10% of zero. it is largely governed by a propagation delay within the cmv1036 of few hundred nanoseconds followed by an exponential decay determined by the load resistance in parallel with the load capacitance. the turn on delay (enable response), t on , is defined as the time between the shutdown signal crossing the threshold and the time the output reaches to within 10% of its final value. t on is largely independent of supply voltage and input level. 7. typical applications illustrated in figure 4 is a sample and hold amplifier capable of operating from a single rail, but it will work equally well with split rails the circuit will accommo- date input voltages (common mode) from zero volts to v+ - 1 volt. the shut down feature of the cmv1036 is used to disable a 1 whose output acts like a very high impedance in this mode. the high slew rate of the cmv1036 and large output current minimize acquisi- tion time. a 2 presents a very high input impedance and very low bias current. a logic 1, a voltage > v+ C 1 volt will put the circuit into "sample" mode. a logic "0" will put the circuit in "hold" mode. for the values shown, acquisition time to 0.1% is typically 10 ms for a zero to 4 volt input, the hold step is typically 400 m v, and the droop rate at 85c is 0.1 m v/ m s. overall accuracy is better than 0.01%. for minimum droop, c 1 should be of polystyrene construction. 7. typical applications illustrated in figure 4 is a sample and hold amplifier capable of operating from a single rail, but it will work equally well with split rails the circuit will accommo- date input voltages (common mode) from zero volts to v+ C 1 volt. the shut down feature of the cmv1036 is used to disable a 1 whose output acts like a very high impedance in this mode. the high slew rate of the cmv1036 and large output current minimize acquisi- tion time. a 2 presents a very high input impedance and very low bias current a logic "1", a voltage > v+ C 1 volt will put the circuit into sample mode. a logic "0" will put the circuit in "hold" mode. for the values shown, acquisition time to 0.1% is typically 10 m s for a zero to 4 volt input, the hold step is typically 400 m v, and the droop rate at 85c is 0.1 m v/ m s. overall accuracy is better than 0.01%. for minimum droop, c 1 should be of polystyrene construction.
?2000 california micro devices corp. all rights reserved. 5/00 215 topaz street, milpitas, california 95035 tel: (408) 263-3214 fax: (408) 263-7846 www.calmicro.com 12 california micro devices cmv1036 figure 4 the circuit illustrated in figure 5 provides a simple analog switch capable of operating from supply voltages as low as 2.2 volts. the circuit takes advan- tage of the cmv1036s shutdown feature which places the output stage in a high impedance mode. the outputs are simply "wire ord", and as configured, a logic "1" (logic in voltage > v+ C 1 volt), v in 2 is selected. figure 5

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