A/D, D/C Converters for Image Signal Processing MN65531AS Low Power 6-Bit CMOS A/D Converter for Image Processing Overview The MN65531AS is a totally parallel 6-bit CMOS analog-to-digital converter with a maximum conversion rate of 20 MSPS. It includes a built-in 3-input multiplexer, clamp circuit, and reference voltage power supply. Features Maximum conversion rate: 20 MSPS (min.) Linearity error: ±0.5 LSB (typ.) Differential linearity error: ±0.5 LSB (typ.) Power supply voltage: 5.0 ±0.5 V Power consumption: 100 mW (typ.) Built-in 3-input multiplexer, clamp circuit, and reference voltage power supply Applications Pin Assignment VRB 1 22 AVDD VRT 2 21 DVDD ASM 3 20 D6 B–YIN 4 19 D5 R–YIN 5 18 D4 YIN 6 17 D3 AVSS 7 16 D2 DVSS 8 15 D1 SY 9 14 CLK SR–Y 10 13 CCP SB–Y 11 12 YCP Digital television receivers Digital video equipment (TOP VIEW) Picture in picture systems Digital image processing equipment SOP022-P-0375 1 MN65531AS A/D, D/C Converters for Image Signal Processing DVDD 21 DVSS 8 22 7 AVSS AVDD Block Diagram A=1 2 64 15 32 R-YIN B-YIN 7 1 Clamp 8 2 3 Clock Generator ASM 9 SY 10 SR-Y SB-Y 11 13 CCP YCP 12 Multiplexer 14 YIN 2 6 Latch A=1 Output Buffer 63 CLK VRB 1 Encoder (Duplex Quasi Grey) VRT D1 16 (MSB) D2 17 D3 18 D4 19 D5 20 D6 (LSB) A/D, D/C Converters for Image Signal Processing MN65531AS Pin Descriptions Pin No. 1 Symbol VRB Function Description Reference voltage output (BOTTOM) 2 VRT Reference voltage output (TOP) 3 ASM Analog monitor 4 B–YIN Analog input (B-Y) 5 R–YIN Analog input (R-Y) 6 YIN 7 AVSS 8 DVSS 9 SY Analog input (Y) Ground for analog circuits Ground for digital circuits Multiplexer control (Y) 10 SR–Y Multiplexer control (R-Y) 11 SB–Y Multiplexer control (B-Y) 12 YCP Clamp pulse (Y) 13 CCP Clamp pulse (R-Y, B-Y) 14 CLK Clock input 15 D1 Digital output (MSB) 16 D2 Digital output 17 D3 Digital output 18 D4 Digital output 19 D5 Digital output 20 D6 21 DVDD Power supply for digital circuits Digital output (LSB) 22 AVDD Power supply for analog circuits Absolute Maximum Ratings Parameter Ta=25˚C Power supply voltage for digital circuits Symbol DVDD Rating – 0.3 to +7.0 Unit V Power supply voltage for analog circuits AVDD – 0.3 to +7.0 V VI AVSS – 0.3 to AVDD +0.3 V Output voltage VO DVSS – 0.3 to DVDD +0.3 V Operating ambient temperature Topr –20 to +75 ˚C Storage temperature Tstg –55 to +125 ˚C Input voltage Recommended Operating Conditions Parameter Power supply voltage VDD=DVDD=AVDD=5.0V, VSS=DVSS=AVSS=0V, Ta=25˚C, CC=1µF Symbol VDD min 4.5 "H" level VCH 0.7 × VDD voltage "L" level VCL Digital input "H" level VIH voltage "L" level VIL VSS tCP 1.5 Clock input Clamp pulse width typ 5.0 max 5.5 Unit V VDD V VSS 0.8 V 0.7 × VDD VDD V 0.2 × VDD 2.0 V µs 3 MN65531AS A/D, D/C Converters for Image Signal Processing Electrical Characteristics Parameter Power supply current Resolution Conditions fCLK=20MHz min RES Linearity error typ 20 max 40 Unit mA ±1.0 LSB 6 EL bit ±1.0 Differential linearity error ED Maximum conversion rate Fc(max.) 20 Reference voltage output (bottom) VRB 0.38 × VDD 0.40 × VDD 0.42 × VDD V Reference voltage output (top) VRT 0.78 × VDD 0.80 × VDD 0.82 × VDD V ±0.5 ±0.8 –2 mA ICP ∆VCP ± 0.1V Output "H" level IOH VOH=VDD– 0.8V current "L" level Clamp current 4 DVDD=AVDD=5.0V, DVSS=AVSS=0V, Ta=25˚C Symbol IDD IOL VOL=0.4V 2 Output delay time td CL=50pF 10 Analog input capacitance CI LSB MSPS mA mA 35 15 ns pF A/D, D/C Converters for Image Signal Processing MN65531AS Timing Chart 1. A/D converter and multiplexer timing SY ON SR-Y ON ON SB-Y (ASM) ON ON R-Y1 D1 to 6 Y1 B-Y1 R-Y1 Y2 Y1 R-Y2 B-Y1 CLK 2. Clamp timing (VRT) YIN (VRB) YCP (VRT) R-YIN (VRM) B-YIN (VRB) CCP 5 MN65531AS A/D, D/C Converters for Image Signal Processing Package Dimensions (Unit:mm) SOP022-P-0375 15.30±0.20 12 22 +0.10 0.15 -0.05 9.40±0.30 7.20±0.20 1.10±0.20 0 to 10° 0.30min. 1.27 0.40±0.10 SEATING PLANE 6 0.10±0.10 (1.29) 2.40max. 11 2.00±0.20 1