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. 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 Pin Assignment MN6557A MN6557AS DIP022-P-0400 SOP022-P-0375 DVDD 1 22 CLK AVDD 2 21 D1 AVDD 3 20 D2 IREF 4 19 D3 VREF 5 18 D4 COMP 6 17 D5 VIB 7 16 D6 IOUT 8 15 D7 AVSS 9 14 D8 AVSS 10 13 D9 DVSS 11 12 D10 ( TOP VIEW ) Digital TV Digital video Digital signal processing equipment 1 MN6557A, MN6557AS A/D, D/C Converters for Image Signal Processing Block Diagram (LSB) D10 12 13 D9 14 D8 15 D7 D6 16 D5 17 X-Decoder Latch Y-Decoder 1/2 Latch 18 19 D3 20 D2 21 (MSB)D1 + 22 CLK – COMP 6 D4 Latch 1/4 1/8 Matrix Cell (127=8 × 16–1) 8 IOUT RREF 11 DVSS 10 AVSS 9 AVSS 1 DVDD VIB 2 3 Current Source AVDD + – 2 4 AVDD 5 IREF 7 VREF ROUT A/D, D/C Converters for Image Signal Processing MN6557A, MN6557AS Pin Descriptions Pin No. 1 Symbol DVDD Function Description Power supply for digital section 2 AVDD Power supply for analog section 3 AVDD Power supply for analog section 4 IREF Full-scale adjustment resistor 5 VREF Reference voltage input 6 COMP Phase compensation 7 VIB Capacitor connection 8 IOUT Analog current output 9 AVSS Analog GND 10 AVSS Analog GND 11 DVSS Digital GND 12 D10 Digital input (LSB) 13 D9 Digital input 14 D8 Digital input 15 D7 Digital input 16 D6 Digital input 17 D5 Digital input 18 D4 Digital input 19 D3 Digital input 20 D2 Digital input 21 D1 Digital input (MSB) 22 CLK Sampling clock Absolute Maximum Ratings Ta=25˚C Parameter Digital-section power supply voltage Symbol DVDD Rating – 0.3 to +7.0 Unit V Analog-section power supply voltage AVDD – 0.3 to +7.0 V VI DVSS – 0.3 to DVDD + 0.3 V Output voltage VO AVSS – 0.3 to AVDD + 0.3 V Operating ambient temperature Topr –20 to +70 ˚C Storage temperature Tstg –55 to +125 ˚C Input voltage 3 MN6557A, MN6557AS A/D, D/C Converters for Image Signal Processing Recommended Operating Conditions Parameter Power supply voltage min 4.5 typ 5.0 max 5.5 Unit V Reference voltage VREF 2.95 V Reference resistance RREF 680 Ω External compensating capacitance CCOMP 1 µF Output load resistance ROUT 75 Ω Digital input voltage Clock "H" level VIH 2.4 VDD V "L" level VIL VSS 0.8 V "H" pulse width tWH 13 ns "L" pulse width tWL 13 ns Electrical Characteristics Parameter Power supply current Resolution DVDD=AVDD=5.0V, DGND=AGND=0V, Ta=25˚C Symbol IDD Condition RREF=680Ω, VREF=2.95V min RES typ 25 max 50 Unit mA 10 bit EL ROUT=75Ω, RREF=680Ω ±0.5 ±1.0 LSB Differential linearity error ED VREF=2.95V ±0.3 ±1.0 LSB Full-scale current IFS RREF=680Ω, VREF=2.95V Hold time tH 10 ns Setup time tS 10 ns Linearity error Settling time Maximum conversion rate 4 VDD=AVDD=DVDD=5.0V, VSS=AVSS=DVSS=0V, Ta=25˚C Symbol VDD tST FC(max.) 13 ROUT=75Ω, RREF=680Ω VREF=2.95V 20 30 50 mA 33 ns MSPS A/D, D/C Converters for Image Signal Processing MN6557A, MN6557AS Timing Chart tWH tWL 2.4V CLK 0.8V tS Data Dn-1 tH Dn Dn+1 ±1LSB Analog Out (settling waveform) An td tST ±1LSB td tST 5 MN6557A, MN6557AS A/D, D/C Converters for Image Signal Processing Package Dimensions (Unit: mm) MN6557A DIP022-P-0400 27.7±0.4 12 1 11 2.54 3.3±0.3 0.7min. 5.3max. 3.65±0.20 8.6±0.2 22 0.5±0.1 0 to 15° SEATING PLANE 1.2±0.1 MN6557AS 10.16±0.20 SOP022-P-0375 15.30±0.20 22 12 +0.10 0.15 -0.05 9.40±0.30 7.20±0.20 1.10±0.20 0 to 10° 0.30min. (1.29) 1.27 0.40±0.10 SEATING PLANE 6 0.10±0.10 2.00±0.20 11 2.40max. 1 +0.20 .05 0.25 -0