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MAX1121 Dataheets PDF



Part Number MAX1121
Manufacturers Maxim Integrated Products
Logo Maxim Integrated Products
Description 250Msps Analog-to-Digital Converter
Datasheet MAX1121 DatasheetMAX1121 Datasheet (PDF)

19-3077; Rev 1; 2/04 www.DataSheet4U.com 1.8V, 8-Bit, 250Msps Analog-to-Digital Converter with LVDS Outputs for Wideband Applications General Description The MAX1121 is a monolithic 8-bit, 250Msps analog-todigital converter (ADC) optimized for outstanding dynamic performance at high IF frequencies up to 500MHz. The product operates with conversion rates of up to 250Msps while consuming only 477mW. At 250Msps and an input frequency of 100MHz, the MAX1121 achieves a spurious-free dynamic range (.

  MAX1121   MAX1121


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19-3077; Rev 1; 2/04 www.DataSheet4U.com 1.8V, 8-Bit, 250Msps Analog-to-Digital Converter with LVDS Outputs for Wideband Applications General Description The MAX1121 is a monolithic 8-bit, 250Msps analog-todigital converter (ADC) optimized for outstanding dynamic performance at high IF frequencies up to 500MHz. The product operates with conversion rates of up to 250Msps while consuming only 477mW. At 250Msps and an input frequency of 100MHz, the MAX1121 achieves a spurious-free dynamic range (SFDR) of 68dBc. Its excellent signal-to-noise ratio (SNR) of 48.9dB at 10MHz remains flat (within 0.5dB) for input tones up to 500MHz. This makes the MAX1121 ideal for wideband applications such as digital predistortion in cellular base-station transceiver systems. The MAX1121 requires a single 1.8V supply. The analog input is designed for either differential or singleended operation and can be AC- or DC-coupled. The ADC also features a selectable on-chip divide-by-2 clock circuit, which allows the user to apply clock frequencies as high as 500MHz. This helps to reduce the phase noise of the input clock source. A differential LVDS sampling clock is recommended for best performance. The converter’s digital outputs are LVDS compatible, and the data format can be selected to be either two’s complement or offset binary. The MAX1121 is available in a 68-pin QFN with exposed paddle (EP) and is specified over the industrial (-40°C to +85°C) temperature range. For pin-compatible, higher resolution versions of the MAX1121, refer to the MAX1122 (170Msps), the MAX1123 (210Msps), and the MAX1124 (250Msps) data sheets. ♦ 250Msps Conversion Rate ♦ SNR = 48.8dB/48.7dB at fIN = 100MHz/500MHz ♦ SFDR = 68dBc/63.8dBc at fIN = 100MHz/500MHz ♦ Single 1.8V Supply ♦ 477mW Power Dissipation at 250Msps ♦ On-Chip Track-and-Hold and Internal Reference ♦ On-Chip Selectable Divide-by-2 Clock Input ♦ LVDS Digital Outputs with Data Clock Output ♦ Evaluation Kit Available (Order MAX1124EVKIT) Features MAX1121 Ordering Information PART TEMP RANGE PIN-PACKAGE 68 QFN-EP* MAX1121EGK -40°C to +85°C *EP = Exposed paddle. Pin Configuration TOP VIEW OGND AGND AGND AGND AVCC OVCC AVCC AVCC ORN ORP D7N D6N D5N 51 D4P 50 D4N 49 D3P 48 D3N 47 D2P 46 D2N 45 OGND 44 OVCC 43 DCLKP 42 DCLKN 41 OVCC 40 D1P 39 D1N 38 D0P 37 D0N 36 N.C. 35 N.C. D7P D6P N.C. 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 Applications Wireless and Wired Broadband Communication Digital Oscilloscopes Digital Predistortion Receivers Communications Test Equipment Radar and Satellite Subsystems Antenna Array Processing Instrumentation AVCC AGND REFIO REFADJ AGND AVCC AGND INP INN 1 2 3 4 5 6 7 8 9 EP MAX1121 AGND 10 AVCC 11 AVCC 12 AVCC 13 AVCC 14 AGND 15 AGND 16 CLKDIV 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 AGND AVCC N.C. N.C. N.C. D5P T/B CLKP CLKN OGND AGND AGND AGND OVCC ________________________________________________________________ Maxim Integrated Products OVCC AVCC N.C. N.C. 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. www.DataSheet4U.com 1.8V, 8-Bit, 250Msps Analog-to-Digital Converter with LVDS Outputs for Wideband Applications MAX1121 ABSOLUTE MAXIMUM RATINGS AVCC to AGND ......................................................-0.3V to +2.1V OVCC to OGND .....................................................-0.3V to +2.1V AVCC to OVCC .......................................................-0.3V to +2.1V AGND to OGND ....................................................-0.3V to +0.3V Analog Inputs to AGND ...........................-0.3V to (AVCC + 0.3V) Digital Inputs to AGND.............................-0.3V to (AVCC + 0.3V) REF, REFADJ to AGND............................-0.3V to (AVCC + 0.3V) Digital Outputs to OGND .........................-0.3V to (OVCC + 0.3V) ESD on All Pins (Human Body Model).............................±2000V Continuous Power Dissipation (TA = +70°C) 68-Pin QFN (derate 41.7mW/°C above +70°C) .........3333mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-60°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Maximum Current into Any Pin............................................50mA Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (AVCC = OVCC = 1.8V, AGND = OGND = 0, fSAMPLE = 250MHz, differential sine-wave clock input drive, 0.1µF cap.


MSC1209 MAX1121 CHL8314


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