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| A/D, D/C Converters for Image Signal Processing MN6556A, MN6556AS Low Power 8-Bit CMOS D/A Converters for Image Processing Overview The MN6556A and MN6556AS are 8-bit CMOS digital-to-analog converters with a maximum conversion rate of 20 MSPS. They use both a matrix cell and weighted current technology to achieve a low power consumption of only 50 mW. Output has an amplitude of one volt above the ground level. Pin Assignment MN6556A : DIP022-P-0400 MN6556AS : SOP022-P-0375 AVDD AVDD IO VC VIB COMP VREF IREF AVSS N.C. N.C. 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 DVSS DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 CLK DVDD Features Maximum conversion rate: 20 MSPS (min.) Linearity error: 0.3 LSB (typ.) Differential linearity error: 0.3 LSB (typ.) Power supply voltage: 5.00.5 V Power consumption: 50 mW (typ.) Full scale current: 5 mA (typ.) Applications Digital television Digital video equipment Digital image processing equipment Measuring instrument (TOP VIEW) 1 MN6556A, MN6556AS Block Diagram A/D, D/C Converters for Image Signal Processing 6 COMP 13 17 VREF 7 IREF 8 RREF Current Source X-Decoder 18 Latch 19 20 Latch DB3 16 Y-Decoder 1/2 Latch DB2 DB1 (MSB) 15 14 21 1/4 DB8 (LSB) CLK DB4 DB5 DB6 DB7 10 11 12 22 5 N.C. AVDD AVDD N.C. DVSS DVDD AVSS VIB - 2 VC 4 1 2 9 + - 3 IO ROUT Matrix Current Cell + A/D, D/C Converters for Image Signal Processing Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Symbol AVDD AVDD IO VC VIB COMP VREF IREF AVSS N.C. N.C. DVDD CLK DB1 DB2 DB3 DB4 DB5 DB6 DB7 DB8 DVSS Function Description Power supply for analog circuits Power supply for analog circuits Analog current output Capacitor connection Capacitor connection Phase compensation Reference voltage input pin Reference resistor Ground for analog circuits No connection No connection Ground for digital circuits Sampling clock Digital input (MSB) Digital input Digital input Digital input Digital input Digital input Digital input Digital input (LSB) Power supply for digital circuits MN6556A, MN6556AS Absolute Maximum Ratings Parameter Power supply voltage for digital circuits Power supply voltage for analog circuits Ta=25C Symbol DVDD AVDD VI VO Topr Tstg Rating - 0.3 to +7.0 - 0.3 to +7.0 DVSS - 0.3 to DVDD +0.3 AVSS - 0.3 to AVDD +0.3 -20 to +70 -55 to +125 Unit V V V V C C Input voltage Output voltage Operating ambient temperature Storage temperature 3 MN6556A, MN6556AS A/D, D/C Converters for Image Signal Processing VDD=AVDD=DVDD=5.0V, VSS=AVSS=DVSS=0V, Ta=25C Recommended Operating Conditions Parameter Power supply voltage Reference voltage Reference resistance External compensation capacitor Output load resistance Digital input voltage Clock "H" level "L" level "H" level pulse width "L" level pulse width Symbol VDD VREF RREF CCOMP ROUT VIH VIL tWH tWL min 4.5 1.5 typ 5.0 1.8 1 200 max 5.5 Unit V V k F 2.4 VSS 20 20 VDD 0.8 V V ns ns Electrical Characteristics Parameter Power supply voltage Resolution Linearity error Differential linearity error Full scale current Setup time Hold time Settling time Maximum conversion speed DVDD=AVDD=5.0V, DVSS=AVSS=0V, Ta=25C Symbol IDD RES EL ED IFS tS tH tST FC(max.) Conditions min typ 10 8 0.3 0.3 max 20 0.5 0.5 5.5 Unit mA bit LSB LSB mA ns ns RREF=1.5k, ROUT=200 VREF=1.8V RREF=1.5k, VREF=1.8V 4.5 15 15 RREF=1.5k, ROUT=200 VREF=1.8V 20 5.0 50 ns MSPS 4 A/D, D/C Converters for Image Signal Processing Timing Chart MN6556A, MN6556AS tWH CLK tWL 2.4V 0.8V tS tH Data Dn-1 Dn Dn+1 1/2LSB Analog Output (Settling waveform) An 1/2LSB td tST td tST 5 MN6556A, MN6556AS Package Dimensions (Unit:mm) MN6556A DIP022-P-0400 27.70.4 22 A/D, D/C Converters for Image Signal Processing 12 1 11 3.650.20 0.7min. 5.3max. 8.60.2 3.30.3 10.160.20 2.54 0.50.1 1.20.1 0 to 15 SEATING PLANE 0.25 -0 +0.20 .05 MN6556AS SOP022-P-0375 15.300.20 22 12 1.100.20 7.200.20 9.400.30 0.15 +0.10 -0.05 0 to 10 0.30min. 1 11 (1.29) 1.27 0.400.10 SEATING PLANE 6 0.100.10 2.40max. 2.000.20 |
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