The MAX1421 is a +3.3V, 12-bit analog-to-digital converter (ADC), featuring a fully-differential input, pipelined, 12-stage ADC architecture with wideband track-and-hold (T/H) and digital error correction incorporating a fully-differential signal path. The MAX1421 is optimized for low-power, high-dynamic performance applications in imaging and digital communications. The converter operates from a single +3.3V supply, consuming only 188mW while delivering a typical signal- to-noise ratio (SNR) of 66dB at an input frequency of 15MHz and a sampling frequency of 40Msps. The fully-differential input stage has a small signal -3dB bandwidth of 400MHz and may be operated with single- ended inputs.
An internal +2.048V precision bandgap reference sets the full-scale range of the ADC. A flexible reference structure accommodates an internal or externally applied buffered or unbuffered reference for applications requiring increased accuracy or a different input voltage range.
In addition to low operating power, the MAX1421 features two power-down modes, a reference power-down and a shutdown mode. In reference power-down, the internal bandgap reference is deactivated, resulting in a typical 2mA supply current reduction. For idle periods, a full shutdown mode is available to maximize power savings.
The MAX1421 provides parallel, offset binary, CMOScompatible three-state outputs.
The MAX1421 is available in a 7mm x 7mm, 48-pin TQFP package, and is specified over the commercial (0°C to +70°C) and the extended industrial (-40°C to+85°C) temperature ranges.
Pin-compatible higher- and lower-speed versions of the MAX1421 are also available. Please refer to the MAX1420 data sheet for a frequency of 60Msps and the MAX1422 data sheet for a frequency of 20Msps.
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Medical Ultrasound Imaging CCD Pixel Processing Data Acquisition Radar IF and Baseband Digitization
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Single +3.3V Power Supply 67dB SNR at fIN = 5MHz 66dB SNR at fIN = 15MHz Internal, +2.048V Precision Bandgap Reference Differential, Wideband Input T/H Amplifier Power-Down Modes 180mW (Reference Shutdown Mode) 10µW (Shutdown Mode) Space-Saving 48-Pin TQFP Package
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AVDD, DVDD to AGND..............................................-0.3V to +4V
DVDD, AVDD to DGND..............................................-0.3V to +4V
DGND to AGND....................................................-0.3V to +0.3V
INP, INN, REFP, REFN, REFIN,
CML, CLK, CLK,..........................(AGND - 0.3V) to (AVDD + 0.3V)
D0D11, OE, PD .......................(DGND - 0.3V) to (DVDD + 0.3V)
Continuous Power Dissipation (TA = +70°C)
48-Pin TQFP (derate 12.5mW/°C above +70°C)..........1000mW
Maximum Junction Temperature ...................................+150°C
Operating Temperature Ranges
MAX1421CCM ......................................................0°C to +70°C
MAX1421ECM ...................................................-40°C to +85°C
Storage Temperature Range .........................-65°C to +150°C
Lead Temperature (soldering, 10s) ..............................+300°C
Post a Buying Lead
Required Field 
