ADS805

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12-Bit, 20-MSPS Analog-to-Digital Converter (ADC)

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Product details

Parameters

Sample rate (Max) (MSPS) 20 Resolution (Bits) 12 Number of input channels 1 Analog input BW (MHz) 270 Features Low Power Rating Catalog Input range (Vp-p) 2, 5 Power consumption (Typ) (mW) 300 Architecture Pipeline SNR (dB) 68 ENOB (Bits) 10.7 SFDR (dB) 74 Operating temperature range (C) -40 to 85 Input buffer No open-in-new Find other High-speed ADCs (>10MSPS)

Package | Pins | Size

SSOP (DB) 28 54 mm² 10.5 x 5.3 open-in-new Find other High-speed ADCs (>10MSPS)

Features

  • HIGH SFDR: 74dB at 9.8MHz fIN
  • HIGH SNR: 68dB
  • LOW POWER: 300mW
  • LOW DLE: 0.25LSB
  • FLEXIBLE INPUT RANGE
  • OVER-RANGE INDICATOR
  • APPLICATIONS
    • STUDIO CAMERAS
    • IF AND BASEBAND DIGITIZATION
    • COPIERS
    • TEST INSTRUMENTATION

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Description

The ADS805 is a 20MHz, high dynamic range, 12-bit, pipelined Analog-to-Digital Converter ADC. This converter includes a high-bandwidth track-and-hold that gives excellent spurious performance up to and beyond the Nyquist rate. This high-bandwidth, linear track-and-hold minimizes harmonics and has low jitter, leading to excellent Signal-to-Noise Ratio (SNR) performance. The ADS805 is also pin-compatible with the 10MHz ADS804 and the 5MHz ADS803.

The ADS805 provides an internal reference or an external reference can be used. The ADS805 can be programmed for a 2Vp-p input range which is the easiest to drive with a single op amp and provides the best spurious performance. Alternatively, the 5Vp-p input range can be used for the lowest input-referred noise of 0.09LSBs rms giving superior imaging performance. There is also the capability to set the input range between 2Vp-p and 5Vp-p, either single-ended or differential. The ADS805 also provides an over-range flag that indicates when the input signal has exceeded the converter’s full-scale range. This flag can also be used to reduce the gain of the front end signal conditioning circuitry.

The ADS805 employs digital error techniques to provide excellent differential linearity for demanding imaging applications. Its low distortion and high SNR give the extra margin needed for communications, medical imaging, video, and test instrumentation applications. The ADS805 is available in an SSOP-28 package.

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Technical documentation

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Type Title Date
* Datasheet 12-Bit, 20MHz Sampling Analog-To-Digital Converter datasheet (Rev. B) Jul. 18, 2002
Technical articles How to achieve fast frequency hopping Mar. 03, 2019
Technical articles RF sampling: Learning more about latency Feb. 09, 2017
Technical articles Why phase noise matters in RF sampling converters Nov. 28, 2016
Technical articles How to minimize filter loss when you drive an ADC Oct. 20, 2016
Application notes Driving High-Speed ADCs: Circuit Topologies and System-Level Parameters (Rev. A) Sep. 10, 2010
Application notes Smart Selection of ADC/DAC Enables Better Design of Software-Defined Radio Apr. 28, 2009
Application notes CDCE62005 as Clock Solution for High-Speed ADCs Sep. 04, 2008
Application notes CDCE72010 as a Clocking Solution for High-Speed Analog-to-Digital Converters Jun. 08, 2008
Application notes Phase Noise Performance and Jitter Cleaning Ability of CDCE72010 Jun. 02, 2008
User guides DEM-ADS80xU Evaluation Fixture (Rev. A) Apr. 05, 2007

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Design tools & simulation

CALCULATION TOOLS Download
Jitter and SNR Calculator for ADCs
JITTER-SNR-CALC JITTER-SNR-CALC can be used for calculating theoretical Signal to Noise (SNR) performance of ADCs based on input frequency and clock jitter.

CAD/CAE symbols

Package Pins Download
SSOP (DB) 28 View options

Ordering & quality

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