Overview
Features and Benefits
- 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 LQFP Package
Product Details
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, CMOS-compatible three-state outputs.
The MAX1421 is available in a 7mm x 7mm, 48-pin LQFP 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.
Applications
- CCD Pixel Processing
- Data Acquisition
- IF and Baseband Digitization
- Medical Ultrasound Imaging
- Radar
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (2)
Documentation & Resources
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MAX1421 Reliability Data1/12/2023PDF172K
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Crunching FFTs with Microsoft Excel8/6/2004
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Dynamic Testing of High-Speed ADCs, Part 27/22/2002
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Pipeline ADCs Come of Age11/20/2001
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Defining and Testing Dynamic Parameters in High-Speed ADCs, Part 111/19/2001
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| MAX1421ECM+D | Material Declaration | Reliability Data | 48-LQFP-7X7X1.4 | |
| Wafer Fabrication Data | MAX1421 Reliability Data |
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.