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| AT1175 Preliminary Product Information 8-Bit 20MSPS CMOS VIDEO A/D CONVERTER Features Resolution: 8-Bit 0.5 LSB(DNL) Maximum Conversion Rate: 20 MSPS Built-in Sample and Hold Function Built-in Reference Voltage Self Bias Circuit Single +5.0 V Power Supply Three-State TTL Compatible Output Direct Replacement for the Sony CXD1175 General Description The AT1175 is a CMOS two-step A/D converter capable of digitizing full-scale analog input signals into 8-bit digital words at sample rate of 20 MSPS. For most application, no external sample-andhold or video driving amplifiers are needed thanks to the device's narrow aperture time, wide bandwidth, and low input capacitance. The AT1175 operates from a single +5.0V power supply and has an internal voltage reference, which eliminates the need for external reference circuitry. All digital inputs are CMOS compatible and the tri-state outputs are TTLcompatible. The AT1175 is ideal for most video and image processing applications that require low power dissipation and low cost. Applications Video Digitizing Personal Computer Video Multimedia Digital Television Block Diagram Aimtron reserves the right without notice to change this circuitry and specifications. 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 1 AT1175 Preliminary Product Information 8-Bit 20MSPS CMOS VIDEO A/D CONVERTER Pin Configuration Ordering Information Part number. AT1175S AT1175S_GRE Package SOP24( 300 mil) SOP24(300 mil),Green Marking AT1175S AT1175S, date code with one bottom line Pin Description PIN NAME FUNCTION Output Enable Control 1 OE D0~D7 Enabled When OE = Low D0~D7 at Tri-state When OE = High 2,24 3~10 11,13 12 16 DGND Digital GND D0~D7 Digital Output Data D0 (LSB), D7(MSB) 23 17 19 20 21 22 VRB VRT VIN Reference Voltage (Bottom) Reference Voltage (Top) Analog Input PIN 14 15 18 NAME FUNCTION AVDD Analog +5V Supply DVDD Digital +5V Supply CLK Clock Input AGND Analog GND VRBS Shorted with VRB to Generate +0.6V Reference VRTS Shorted with VRT to Generate +2.6V Reference 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 2 AT1175 Preliminary Product Information 8-Bit 20MSPS CMOS VIDEO A/D CONVERTER Absolute Maximum Ratings (Beyond which damage may occur) 250C Supply Voltages VDD ...................................................-0.5 to +7.0 V Input Voltages Analog Input .......................................AGND to VDD Reference Input Voltage .........................AGND to VDD ESD Susceptibility ....................................1,500V Temperature Operating Temperature ..........................-20 to +700C Junction Temperature ....................................1750C Lead Temperature, (Soldering 10 seconds) ...........3000C Storage Temperature ............................-55 to +1250C Electrical Specifications Ta=+250C, AVDD=DVDD= VDD =+5.0V, AGND=DGND=0.0V, VRB=1V and VRT=3V, fs=20 MSPS ,unless otherwise specified. PARAMETERS Resolution DC Accuracy (+250C) Integral Nonlinearity Differential Nonlinearity Zero Scale Error Full Scale Error No Missing Codes Analog Input Input Voltage Range Input Bias Current Input Resistance Input Capacitance Reference Input Reference Ladder Resistance Reference Current Reference Input Voltage Reference Differential Internal Bias1 TEST CONDICTION MIN 8 TYP MAX UNITS Bits LSB LSB mV mV fs=20 MSPS, VIN =1.0V to 3.0V EZS EFS -10 0 VRB 100 0.8 0.5 -35 -60 45 60 Guaranteed VRT 5.0 200 15 270 7.5 0.6 2.6 0.60 2.0 2.39 340 10.5 3.0 VDD 5.0 0.65 2.1 2.53 VIN V A k pF mA V V V V V V Internal Bias2 (VRT) Dynamic Performance Signal-To-Noise Ratio fin=1.667MHz fin=3.85MHz Spurious Free Dynamic Range fin=1.667MHz fin=3.85MHz Differential Phase Differential Gain Digital Inputs Voltage, Logic High VRT to VRB VRT - VRB =2.0V VRB VRT VRT - VRB VRB VRT -VRB Short VRT and VRTS Short VRB and VRBS Short VRT and VRTS Short VRB and AGND fs=14.29 MSPS 200 5.2 0.0 2.0 1.0 0.55 1.9 2.25 44 43 fs=14.29 MSPS 43 41 NTSC 40 IRE Mod Ramp fs=14.3 MSPS 4.0 46 48 42 0.7 1.0 VDD dB dB dB dB Degrees % V 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 3 AT1175 Preliminary Product Information 8-Bit 20MSPS CMOS VIDEO A/D CONVERTER Voltage, Logic Low Input Current, Logic High Input Current, Logic Low Digital Outputs Output Current, Logic High Output Current, Logic Low Output Current, High `Z' Voltage , Logic High Voltage , Logic Low Power Supply Requirements AVDD (Analog Supply Voltage) DVDD (Digital Supply Voltage) Supply Voltage Difference Supply Current Power Dissipation 0 VDD=max, VIH=VDD VDD=max, VIL=DGND VDD=min VOH=4.25V - 1.1 VDD=min VOL=0.4V 2.0 VDD=max /OE=VDD IOH =-4mA 3.5 IOL =4mA +4.75 +4.75 -0.1 +5.0 +5.0 0.0 30 150 1.0 5.0 5.0 V A A mA mA A V V V V V mA mW 1 0.8 +5.25 +5.25 0.1 (AVDD-DVDD) fs=20 MSPS(Does not include ref. current) NTSC ramp wave input Timing Specifications Ta=+250C, AVDD=DVDD= VDD =+5.0V, AGND=DGND=0.0V, VRB=1V and VRT=3V, fs=20 MSPS ,unless otherwise specified. PARAMETERS fS Maximum conversion rate tW(H) Pulse Width High tW(L) Pulse Width Low td(D) Digital output delay time tAJ Aperture jitter time td(S) Sampling delay time ten Output Enable time tdis Output Disable time tw(H) tw(L) TEST CONDICTION fin=1kHz ramp CL10pF CL=10pF CL=10pF MIN 20 15 15 TYP MAX 18 30 4 5 7 30 UNITS MSPS ns ns ns ps ns ns ns Clock N Analog input td(s) N+1 N+2 N+3 td(D) N+4 N+5 Data Output OE N-3 N-2 N-1 N tdis N+2 ten 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 4 AT1175 Preliminary Product Information 8-Bit 20MSPS CMOS VIDEO A/D CONVERTER Digital Output Code Input Signal Voltage VRT . . . . . . . VRB . Step 0 . . . 127 128 . . 254 255 Digital output code MSB LSB 11111111 11111110 . . 10000000 01111111 . . 00000001 00000000 Typical Application Schematic 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 5 AT1175 Preliminary Product Information 8-Bit 20MSPS CMOS VIDEO A/D CONVERTER Package Outline (24-pin 300 mil Plastic SOP) SYMBOLS A A1 A2 B C D E e H L y DIMENSIONS IN MILLIMETERS MIN NOM MAX 2.36 2.49 2.64 0.10 0.30 2.34 0.33 0.41 0.51 0.23 0.25 0.33 15.19 15.39 15.49 7.39 7.49 7.59 1.27 10.01 10.31 10.64 0.38 0.81 1.27 0 8 DIMENSIONS IN INCHES MIN 0.093 0.004 0.013 0.009 0.598 0.291 0.394 0.015 0 NOM 0.098 0.092 0.016 0.010 0.606 0.295 0.050 0.406 0.032 MAX 0.104 0.012 0.020 0.012 0.610 0.299 0.419 0.050 8 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 6 |
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