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A/D, D/C Converters for Image Signal Processing MN6557A, MN6557AS Low-Power-Consumption CMOS 10-Bit D/A Converters for Image Processing Overview The MN6557A and MN6557AS are CMOS 10-bit D/A converters with a maximum conversion rate of 30 MSPS. High precision has been achieved by the combined use of a matrix cell system and weighted current system. They also feature low power consumption owing to the use of a CMOS process, and operate on a single power supply of 5V, and have a TTL input level. These devices are suitable for digitalization of image processing in video, TV, and similar applications. Pin Assignment MN6557A MN6557AS DVDD AVDD AVDD IREF VREF COMP VIB IOUT AVSS AVSS DVSS DIP022-P-0400 SOP022-P-0375 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 CLK D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 Features Maximum conversion rate: 30 MSPS (min.) Linearity error: 0.5 LSB (typ.) Differential linearity error: 0.3 LSB (typ.) Power supply voltage: 5.0 0.5 V Power consumption: 125 mW (typ.) Full-scale current: 13 mA (typ.) Applications Digital TV Digital video Digital signal processing equipment ( TOP VIEW ) 1 MN6557A, MN6557AS Block Diagram A/D, D/C Converters for Image Signal Processing (LSB) D10 12 13 D9 14 D8 15 D7 D6 16 D5 17 X-Decoder Latch 18 19 D3 20 D2 21 (MSB)D1 + 22 CLK - COMP 6 D4 VREF IREF 5 4 + - Latch Y-Decoder Latch 1/2 Matrix Cell (127=8 x 16-1) 1/4 1/8 8 IOUT ROUT RREF Current Source 10 AVSS 11 DVSS 7 2 3 1 DVDD 9 AVSS AVDD 2 AVDD VIB 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 DVDD AVDD AVDD IREF VREF COMP VIB IOUT AVSS AVSS DVSS D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 CLK Function Description Power supply for digital section Power supply for analog section Power supply for analog section Full-scale adjustment resistor Reference voltage input Phase compensation Capacitor connection Analog current output Analog GND Analog GND Digital GND Digital input (LSB) Digital input Digital input Digital input Digital input Digital input Digital input Digital input Digital input Digital input (MSB) Sampling clock MN6557A, MN6557AS Absolute Maximum Ratings Parameter Digital-section power supply voltage Analog-section power supply voltage Input voltage Output voltage Operating ambient temperature Storage temperature 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 3 MN6557A, MN6557AS 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 compensating capacitance Output load resistance Digital input voltage Clock "H" level "L" level "H" pulse width "L" pulse width Symbol VDD VREF RREF CCOMP ROUT VIH VIL tWH tWL min 4.5 typ 5.0 2.95 680 1 75 max 5.5 Unit V V F 2.4 VSS 13 13 VDD 0.8 V V ns ns Electrical Characteristics Parameter Power supply current Resolution Linearity error Differential linearity error Full-scale current Hold time Setup time Settling time Maximum conversion rate DVDD=AVDD=5.0V, DGND=AGND=0V, Ta=25C Symbol IDD RES EL ED IFS tH tS tST FC(max.) Condition RREF=680, VREF=2.95V ROUT=75, RREF=680 VREF=2.95V RREF=680, VREF=2.95V min typ 25 10 0.5 0.3 13 max 50 1.0 1.0 Unit mA bit LSB LSB mA ns ns 10 10 ROUT=75, RREF=680 VREF=2.95V 30 20 50 33 ns MSPS 4 A/D, D/C Converters for Image Signal Processing Timing Chart MN6557A, MN6557AS tWH CLK tWL 2.4V 0.8V tS tH Data Dn-1 Dn Dn+1 1LSB Analog Out (settling waveform) An 1LSB td tST td tST 5 MN6557A, MN6557AS Package Dimensions (Unit: mm) MN6557A 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 MN6557AS SOP022-P-0375 15.300.20 22 12 1.100.20 7.200.20 9.400.30 0.15 -0.05 +0.10 0 to 10 0.30min. 1 11 2.40max. 2.000.20 (1.29) 1.27 0.400.10 SEATING PLANE 6 0.100.10 |
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