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[AK4203] ms1376-e-00 2012/02 - 1 - general description the AK4203 is an audio stereo cap-less line driver with 1-channel video driver. it eliminates the need for large dc-blocking capacitors with a built-in char ge-pump circuit. the AK4203 achieves 2vrms outputs with excellent linearity 2vrms output by single 3.3v power supply. the AK4203 is available in small 16-pin tssop, saving the system space and cost. feature audio line-amp ? differential input ? stereo cap-less amplifier (no dc-blocking capacitors required) ? line-out level: 2.0vrms ? thd+n: -90db ? s/n: 102db ? output gain: 6db ? low-pass filter: fc= 130khz ? pop noise free ground-referenced output video amp ? 1ch stereo cap-less amplifier (no dc-blocking capacitors required) ? integrated video amplifier (+6db) ? input level: 1.5vpp (max) ? sn: 75db(typ), bandwidth: 100khz 6mhz ? lpf: -0.5db@ 6.75mhz (typ), -43db@27mhz (typ) ? video mute function ? power supply: 3.0v ~ 3.6v ? ta: ? 20 85 c ? package: 16tssop stereo cap-less line-amp and video-amp AK4203
[AK4203] ms1376-e-00 2012/02 - 2 - block diagram charge pump lin+ lin- vdd1 vdd2 vss1 cvee cp cn vss2 rin+ rin- vin + - + - lout rout clamp lpf + - vout vmute figure 1. AK4203 block diagram
[AK4203] ms1376-e-00 2012/02 - 3 - ordering guide AK4203et ? 20 +85 c 16pin tssop (0.65mm pitch) akd4203 evaluation board for AK4203 pin layout 6 5 4 3 2 1 vin vpdn cp cn linn linp 7 rinn 8 vdd2 vss2 vout vee vss1 vdd1 lout rout AK4203 top view 11 12 13 14 15 16 10 9 rinp
[AK4203] ms1376-e-00 2012/02 - 4 - pin/function no. pin name i/o function 1 vin i video signal input pin 2 vpdn i video mute pin 3 cn i negative charge pump capacitor terminal pin 4 cp o positive charge pump capacitor terminal pin 5 linn i lch audio negative input pin 6 linp i lch audio positive input pin 7 rinp i rch audio positive input pin 8 rinn i rch audio negative input pin 9 rout o audio output pin (r channel) 10 lout o audio output pin (l channel) 11 vdd1 - power supply 1 pin, 3.0v 3.6v connect to vss1 with a 0.1 f ceramic capacitor in parallel with a 10 f 3.3v electrolytic capacitor. 12 vss1 - ground 1 pin 13 vee o negative voltage output pin connect to vss1 with a 10 f 3.3v electrolytic capacitor. 14 vout o video si gnal output pin 15 vss2 - ground 2 pin 16 vdd2 - power supply 2 pin, 3.0v 3.6v connect to vss2 with a 0.1 f ceramic capacitor in parallel with a 10 f 3.3v electrolytic capacitor. handling of unused pin the unused i/o pins must be processed appropriately as below. classification pin name setting digital input vpdn vss1 audio input linp/n, rinp/n vss1 audio, video out put aout, vout open
[AK4203] ms1376-e-00 2012/02 - 5 - absolute maximum ratings (vss1=vss2 =0v ( note 1 )) parameter symbol min max unit power supply vdd1 vdd2 -0.3 4.0 v input current (any pins except for supplies) iin - 10 ma audio input voltage ( note 4 ) vina vee -0.3 vdd1 +0.3 v video input voltage vinv -0.3 vdd2 +0.3 v ambient operating temperature ta -20 85 c storage temperature tstg -65 150 c note 1. all voltages are respect to ground. note 2. vss1 and vss2 must be c onnected to the same analog plane. note 3. vdd1 and vdd2 must be the same voltage. note 4. vee: the vee pin voltage vee is generated by the internal charge pump circuit. vee voltage is ?-vdd1 +0.2v? (typ). warning: operation at or beyond these limits may result in permanent damage to the device. normal operation is not guara nteed at these extremes. recommend operating conditions (vss1=vss2 =0v) parameter symbol min typ max unit power supply vdd1 vdd2 3.0 3.0 3.3 3.3 3.6 3.6 v v note 3. vdd1 and vdd2 must be the same voltage. note: akm assumes no responsibility for the usag e beyond the conditions in this datasheet. electical characteristics (ta=25 c; vdd1= vdd2 = 3.3v; vss1= vss2 = 0v) power supplies parameter min typ max unit power supply (vdd1+vdd2) normal operation ( note 5) 18 30 ma note 5. no input and no load.
[AK4203] ms1376-e-00 2012/02 - 6 - analog characteristics (audio) (ta=25 c; vdd1=vdd2= 3.3v; vss1=vss2=0v; input signal frequency =1khz; measurement band width=10hz 20khz; r l =5k ? , unless otherwise specified) parameter min typ max unit output level ( note 6 ) - 2 - vrms gain - 6 - db thd+n (at 2vrms output, vdd1 3.135v) 90 - db dynamic range (-60dbfs with a-weighted) - 102 db s/n (a-weighted) - 102 db inter channel isolation - 100 db output offset voltage 0 5 mv lpf frequency response -3db - 130 - khz note 6. vdd1 3.135v, thd+n=-90db. analog characteristics (video) (ta=25 c; vdd1=vdd2= 3.3v; vss1=vss2=0v; unless otherwise specified, note 7, note 8) parameter conditions min typ max unit input signal 1.5 vpp output gain input=0.2vp-p, 100khz - 6 - db output signal f=100khz, thd=-30db. 2.52 vpp response at 6.75mhz - -0.5 - db response at 27mhz - -43 - db frequency response input=0.2vpp, sin wave (0db at 100khz) group delay distortion |gd3mhz?gd6mhz| - 10 - nsec s/n (*) bw= 100khz to 6mhz. - 81 db load resistance r1+r2 ( note 9 ) 140 150 160 load capacitance c1 ( note 9) c2 ( note 9) 400 15 pf pf note 7. the analog characteristics are specified at the pin of each output. note 8. input sync tip level=-0.43v -0.14v(the sync chip level based on the pedestal level) horizontal line sync pulse=4.0 s 5.4 s, equalizing pulse=2.0 s 2.7 s, serration pulse=4.0 s 5.4 s note 9. refer to the figure 2 . *ccir 567 weighting. vout 75 75 max: 400pf (c1) c1 r1 r2 max: 15pf (c2) c2 figure 2. load resistance r1+r2 and load capacitance c1/c2.
[AK4203] ms1376-e-00 2012/02 - 7 - operation overview charge pump circuit internal negative power supply circuit ( figure 3 ) supplies the negative voltage to the video amp and the video amp 0v output is used for a pedestal level in figure 4 and figure 5 . therefore, the output coupling capacitor can be removed. vdd2 charge pump cp cn vss1 vee 10uf 1uf negative power a k4203 (+) c2 c1 (+) figure 3. charge pump circuit note 10. c1 and c2 should be low esr (equivalent series resistance) capacitors. when those capacitors have the polarity, each positive polarity pins should be connected to cp and vss1 side. a outr a k4203 (aoutl) 0v 2 vrms figure 4. audio signal output vout 75 a k4203 0v 75 figure 5. video signal output
[AK4203] ms1376-e-00 2012/02 - 8 - audio circuit power-up sequence when power supply pins of the AK4203 are fed, the audio circuit and charge pump are powered-up automatically as shown below. lout rout 3.0v power supply vdd1, vdd2 a udio timer circuit a udio analog circuit charge pump vee time a (1) power down vee=0v power up vee=negative voltage linp, n rinp, n -1.85v (2) power up figure 6.system reset diagram note: (1) when vdd1 and vdd2 are powered-up, audio analog output is connected to vss internally via a mute switch. the charge pump is powered-up in slow start mode and vee reaches -1.85v in 0.4ms. do not apply a negative voltage to linp/n and rinp/n pins until the charge pump output is stabilized. (2) when the vee reaches -1.85v, th e audio timer circuit starts coun ting the ?timea? period (max. 15ms). (3) after the ?timea? period, the mute switch is released and the audio output is enabled. (4) no audible click noise occurs under normal conditions.
[AK4203] ms1376-e-00 2012/02 - 9 - video circuit power-up sequence the video circuit of the AK4203 is powered-up when the vpdn pin becomes ?h?. vout 3.0v power supply vdd1, vdd2 video timer circuit charge pump vee time b power down vee=0v power up vee=negative voltage vin (1) vpdn video circuit power down power up vss2=0v video output signal vss2=0v video input signal (2) figure 7. system reset diagram note: (1) when the vpdn pin goes to ?h?, the video timer circuit starts counting ?time b? period (max. 100ms). (2) after the ?time b? period, the video output becomes enabled exiting 0v state.
[AK4203] ms1376-e-00 2012/02 - 10 - system design figure 8 shows the system connection diagram for the AK4203. an evaluation board [akd4203] demonstrates the optimum layout, power supply arrangements and measurement results. an alo g 3.3 v 10 f AK4203 rinn linp linn cp cn vpdn vin rinp aout r aoutl vdd1 vss1 vee vou t vss2 vdd2 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 + 10 + 0.1 lch out rch out 0.1 10 video out + 1u (1) + 0.1u video in 75 audio in l audio in l 1u 1u p audio in r audio in r 1u 1u 75 220 220 figure 8. typical connection diagram
[AK4203] ms1376-e-00 2012/02 - 11 - 1. grounding and power supply decoupling the AK4203 requires careful attention to power supply and grounding arrangements. vdd1 and vdd2 are usually supplied from the analog supply in the system. if vdd1 and vdd2 are supplied separately, they must be powered-up at the same time. vss1 and vss2 pins must be connected to the analog ground plane. system analog ground and digital ground should be wired separately and connected together as close as possible to where the supplies are brought onto the printed circuit board. decoupling capacitors for high frequency should be placed as near as possible to the supply pin. 2. notes for drawing a board analog input and output pins should be as near as possible in order to avoid unwanted coupling into the AK4203. unused pins should be open. 3. analog input 3-1. audio signal input the audio signal inputs are differential input. the output signal of linp/rinp has the same phase. connect a capacitor about 1uf to each i nput pin for ac coupling. 3-2. video signal input tip sync level is fixed by an internal clamp circuit. connect a capacitor about 0.1uf to the vin pin for ac coupling. 4. analog output 4-1. audio signal output the audio signal outputs are single-ended output. the output rages to 2.0vrms (typ) centered vss (0v, typ) via lpf. the dc offset is less than 5mv. 4-2. video signal output the integrated 1-channel video amplifier has drivability for a load resistance of 150 ? . the output gain is +6db (typ) via lpf. dc offset is less than 100mv.
[AK4203] ms1376-e-00 2012/02 - 12 - package 0 10 0.10 0.17 0.05 0.22 0.1 0.65 *5.0 0.1 1 8 9 16 16pin tssop (unit: mm) *4.4 0.1 6.4 0.2 0.13 m 1.1 max s 0.1 0.1 s 0.5 0.2 note: dimension "*" does not include mold flash. package & lead frame material package molding compound: epoxy resign, halogen (br, cl) free lead frame material: cu alloy lead frame surface treatmen t: solder (pb free) plate
[AK4203] ms1376-e-00 2012/02 - 13 - marking 4203et xxxyy 1) pin #1 indication 2) date code: xxxyy (5 digits) xxx: date code yy: lot# 3) marketing code: 4203et date (yy/mm/dd) revision reason page contents 12/02/16 00 first edition revision history
[AK4203] ms1376-e-00 2012/02 - 14 - important notice z these products and their specifications are subject to change without notice. when you consider any use or application of these produc ts, please make inquiries the sales office of asahi kasei microdevices corporation (akm) or authorized distributors as to current status of the products. z descriptions of external circuits, application circuits, software and other related information contained in this document are provided only to illustrate the operation and application exampl es of the semiconductor products. you are fully responsible for the incorporation of these external circuits, application circuits, software and other related information in the design of your e quipments. akm assumes no responsibility fo r any losses incurred by you or third parties arising from the use of these information herein. akm assumes no liability for infringement of any patent, intellectual property, or other rights in the applica tion or use of such information contained herein. z any export of these products, or devices or systems containi ng them, may require an export license or other official approval under the law and regulations of the country of e xport pertaining to customs and tariffs, currency exchange, or strategic materials. z akm products are neither intended nor aut horized for use as critical components note1 ) in any safety, life support, or other hazard related device or system note2 ) , and akm assumes no responsibility fo r such use, except for the use approved with the express written consent by representative director of akm. as used here: note1 ) a critical component is one whose failure to functi on or perform may reasonably be expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it, and which must therefore meet very high standards of performance and reliability. note2 ) a hazard related device or system is one designed or intended for life support or maintenance of safety or for applications in medicine, aeros pace, nuclear energy, or other fields, in which its failure to function or perform may reasonably be expected to result in loss of life or in significant injury or damage to person or property. z it is the responsibility of the buyer or distributor of akm products , who distributes, disposes of, or otherwise places the product with a third party, to notify such third party in advance of the above conten t and conditions, and the buyer or distributor agrees to assume any and all responsib ility and liability for and hold akm harmless from any and all claims arising from the use of said product in the absence of such notification.

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