Buffered input, low power, 14-bit, 250 MSPS ADC - ADS61B49

ADS61B49 (ACTIVE)

Buffered input, low power, 14-bit, 250 MSPS ADC

 

Recommended alternative parts

  • ADS41B49  -  250MSPS with 55% power reduction, also includes high impedance input buffer like ADS61B49
  • ADS4149  -  250MSPS with 65% power reduction

Features

  • Integrated High Impedance Analog Input Buffer
  • Maximum Sample Rate: 250 MSPS
  • 14-Bit Resolution — ADS61B49
  • 12-Bit Resolution — ADS61B29
  • 790 mW Total Power Dissipation at 250 MSPS
  • Double Data Rate (DDR) LVDS and Parallel CMOS Output Options
  • Programmable Fine Gain up to 6 dB for SNR/SFDR Trade-Off and 1-Vpp Full-Scale Operation
  • DC Offset Correction
  • Supports Input Clock Amplitude Down to 400 mVPP Differential
  • 48-QFN Package (7mm × 7mm)
  • Pin Compatible with ADS6149 Family
  • APPLICATIONS
    • Multicarrier, Wide Bandwidth Communications
    • Wireless Multi-Carrier Communications Infrastructure
    • Software Defined Radio
    • Power Amplifier Linearization Feedback ADC
    • 802.16d/e
    • Test and Measurement Instrumentation
    • High Definition Video
    • Medical Imaging
    • Radar Systems

DESCRIPTION

The ADS61B49 (ADS61B29) is a 14-bit (12-bit) A/D converter with a sampling rate up to 250 MSPS. It combines high dynamic performance and low power consumption in a compact 48-QFN package. An integrated analog buffer makes it well-suited for multi-carrier, wide bandwidth communications applications. The buffer maintains constant performance and input impedance across a wide frequency range.

The ADS61B49 (ADS61B29) has fine gain options that can be used to improve SFDR performance at lower full-scale input ranges. It includes a dc offset correction loop that can be used to cancel the ADC offset. Both Double Data Rate (DDR) LVDS and parallel CMOS digital output interfaces are available. At lower sampling rates, the ADC automatically operates at scaled down power with no loss in performance.

It includes internal references while the traditional reference pins and associated decoupling capacitors have been eliminated. The device is specified over the industrial temperature range (-40°C to 85°C).

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Parametrics Compare all products in High Speed ADC (>10MSPS)

 
Resolution (Bits)
Sample Rate (Max) (MSPS)
# Input Channels
SNR (dB)
ENOB (Bits)
SFDR (dB)
Power Consumption (Typ) (mW)
Input Range
Interface
Operating Temperature Range (C)
Analog Input BW (MHz)
Input Buffer
Package Group
Package Size: mm2:W x L (PKG)
Approx. Price (US$)
Rating
SINAD (dB)
Architecture
DNL (Max) (+/-LSB)
INL (Max) (+/-LSB)
Reference Mode
ADS61B49 ADS6128 ADS6129 ADS6148 ADS6149 ADS61B29 ADS62P28 ADS62P29 ADS62P48 ADS62P49
14    12    12    14    14    12    12    12    14    14   
250    210    250    210    250    250    210    250    210    250   
1    1    1    1    1    1    2    2    2    2   
72.4    70.5    70.5    72.7    72.7    70    70.6    70.5    73    73   
11.63    11.4    11.4    11.73    11.73    11.28    11    11.1    11.4    11.3   
86    82    86    82    86    86    85    85    85    85   
790    628    687    628    687    790    1140    1250    1140    1250   
2V (p-p)    2V (p-p)    2V (p-p)    2V (p-p)    2V (p-p)    2V (p-p)    2V (p-p)    2V (p-p)    2V (p-p)    2V (p-p)   
Parallel CMOS
Parallel LVDS
Serial SPI Interface   
Parallel CMOS
Parallel LVDS
Serial SPI Interface   
Parallel CMOS
Parallel LVDS
Serial SPI Interface   
Parallel CMOS
Parallel LVDS
Serial SPI Interface   
Parallel CMOS
Parallel LVDS
Serial SPI Interface   
Parallel CMOS
Parallel LVDS
Serial SPI Interface   
Parallel CMOS
Parallel LVDS
Serial SPI Interface   
Parallel CMOS
Parallel LVDS
Serial SPI Interface   
Parallel CMOS
Parallel LVDS
Serial SPI Interface   
Parallel CMOS
Parallel LVDS
Serial SPI Interface   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
700    700    700    700    700    700    700    700    700    700   
Yes    No    No    No    No    Yes    No    No    No    No   
VQFN    VQFN    VQFN    VQFN    VQFN    VQFN    VQFN    VQFN    VQFN    VQFN   
48VQFN: 49 mm2: 7 x 7(VQFN)    48VQFN: 49 mm2: 7 x 7(VQFN)    48VQFN: 49 mm2: 7 x 7(VQFN)    48VQFN: 49 mm2: 7 x 7(VQFN)    48VQFN: 49 mm2: 7 x 7(VQFN)    48VQFN: 49 mm2: 7 x 7(VQFN)    64VQFN: 81 mm2: 9 x 9(VQFN)    64VQFN: 81 mm2: 9 x 9(VQFN)    64VQFN: 81 mm2: 9 x 9(VQFN)    64VQFN: 81 mm2: 9 x 9(VQFN)   
109.95 | 1ku    45.65 | 1ku    58.14 | 1ku    81.68 | 1ku    106.15 | 1ku    61.93 | 1ku    68.48 | 1ku    96.20 | 1ku    132.00 | 1ku    159.23 | 1ku   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
71.8    70.4    70.4    72.4    72.4    69.7    70.5    70.3    72.8    72.7   
Pipeline    Pipeline    Pipeline    Pipeline    Pipeline    Pipeline    Pipeline    Pipeline    Pipeline    Pipeline   
1    1    1    2    2    1    1    1    1.3    1.3   
5    2.5    2.5    5    5    2.5    2.5    2.5    5    5   
Ext
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Ext
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Ext
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Ext
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Ext
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Ext
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Ext
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Ext
Int   
Ext
Int   

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