? 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 cmv1020 micropower rro operational amplifier features ? tiny sot23-5 package ? guaranteed specs at 1.8v, 2.2v, 2.7v, 3v and 5v ? very low supply current typically 85a@ 3v ? rail-to-rail output ? typical total harmonic distortion of 0.02% at 3v ? 1.66mhz typical gain bandwidth product ? 1v/s typical slew rate product description the cmv1020 is a high performance cmos opera- tional amplifier available in a small sot23-5 pack- age. operating with very low supply current, it is ideal for battery operated applications where power, space and weight are critical. with 1.66mhz gain bandwidth product, 1v/s slew rate, and a typical current consumption of only applications ? mobile communications ? cellular phones ? portable equipment ? notebooks and pdas c0930500 85a, the cmv1020 provides excellent power- performance ratio for power sensitive applications. ideal for use in personal electronics such as cellular handsets, pagers, cordless telephones and other products with limited space and battery power. pin diagram 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 55 - 3 2 t o sr / y 0 2 0 1 v m c0 2 0 1 1 non-inv input output 5-pin sot23-5 v- 4 2 3 + v+ - inv input 5
?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 cmv1020 note 1: absolute maximum ratings indicate limits beyond which damage to the device may occur. operating conditions indicate ratings fo r which the device is intended to be functional, but specific performance is not guaranteed. for guaranteed specifications and th e 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. ) 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 ) 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
? 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 cmv1020 8 . 1s 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 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 s 5 70 5 1a w b gt c u d o r p h t d i w d n a b n i a g 5 3 1z 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 , 18 . 02 . 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 p 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 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 s 0 80 6 1a w b gt c u d o r p h t d i w d n a b n i a g 5 . 1z 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 , 19 . 02 . 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 p 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 v 4 . 1 = p 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
?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 cmv1020 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 s 5 80 7 1a w b gt c u d o r p h t d i w d n a b n i a g 6 6 . 1z 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 , 10 . 15 2 . 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 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 s 5 80 7 1a w b gt c u d o r p h t d i w d n a b n i a g 6 . 1z 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 , 115 2 . 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
? 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 cmv1020 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 . 2 =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 s 0 0 10 0 2a w b gt c u d o r p h t d i w d n a b n i a g 8 . 1z 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 . 4 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 , 12 . 13 . 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 . 2 o t v 5 . 2 = + v v - = - o t v 5 . 2 - v 8 . 2 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 4 < 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 4 = 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
?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 cmv1020 r l = 1meg r l = 100k r l = 10k v+ = 5v v- = 0v t a = 25c open loop voltage 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 inverting small signal response v+ = 5v v- = 0v t a = 25c r l = 100k r l = 10k time( m s) v out (v) 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)
? 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 cmv1020 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
?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 cmv1020 applications information 1. input common mode range and output voltage considerations the cmv1020 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 rs is given by: v in C (v+ + 0.3v) 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. figure 1. 2. output current and power dissipation considerations the cmv1020 is capable of sinking and sourcing output currents in excess of 7ma 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 cmv1020 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+ C v 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 200 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 5v C 0v = 5v, and power dissipation would be equal to 35mw. 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 11.4 which is clearly not a destructive situation even under an ambient temperature of 85c. 3. input impedance considerations the cmv1020 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 cmv1020 (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 the breadboard and the production printed circuit board, we favor the use of a "gimmick", a technique
? 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 cmv1020 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. 4. capacitive load considerations the cmv1020 is capable of driving capacative loads in excess of 100pf without oscillation. however, significant 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 cmv1020 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. typical applications operational amplifiers have been used for years to generate frequency stable oscillators, but the circuit shown in figure 4 provides a stable frequency operat- ing from a single supply voltage and drawing a mere 40 m a. for (r 1 + r 2 ) ? r 1 = 0.473, the period, t, of the oscillator is given by: t = 2 r f c 1 where: r f is the feedback resistor c 1 is the capacitor the period is easily adjusted by varying r f . r 3 ensures that the circuit will start on a single rail by forcing a 1 s output to the positive rail. r 4 s value is not critical but should be a factor of 10 greater than the parallel combination of r 1 and r 2 . the circuit lends itself to a variety of applications such as battery operated toys where a stable frequency is required and low supply current is a must to maintain battery life. figure 4 personal computers including laptops are available with sophisticated and high quality audio capabilities. battery conservation is a key issue with laptop computers, and the circuit in figure 5 utilizes the low supply current of the cmv1020, its rail to rail output voltage swing, and its high output current drive to provide the interface to the microphone input. a 1 is used to provide the common mode bias for a 2 by buffering the v ref output (typically 2.2 volts) of the codec and to supply bias to the microphone. r 1 should be selected for the appropriate bias for the micro- phone. r 3 and c 2 provide low pass filtering for noise, and the closed loop gain of a 2 is adjusted by the ratio of r 5 to r 4 .
?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 cmv1020 figure 5
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