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
  • CDCE72010  -  Recommended clocking solution, providing low jitter clock outputs to maximize converter performance.
  • PGA870  -  High Speed Fully Differential Digital Variable Gain Amplifier with -98dBc IMD3 at 100MHz
  • 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) (SPS)
# Input Channels
SNR (dB)
ENOB (Bits)
SFDR (dB)
SINAD (dB)
Power Consumption (Typ) (mW)
Analog Input BW (MHz)
Architecture
DNL (Max) (+/-LSB)
INL (Max) (+/-LSB)
Digital Supply (Min) (V)
Digital Supply (Max) (V)
Analog Voltage AV/DD (Min) (V)
Analog Voltage AV/DD (Max) (V)
Reference Mode
Input Range
Interface
Rating
Operating Temperature Range (C)
Approx. Price (US$)
ADS61B49 ADS6128 ADS6129 ADS6148 ADS6149 ADS61B29 ADS62P28 ADS62P29 ADS62P48 ADS62P49
14     12     12     14     14     12     12     12     14     14    
250MSPS     210MSPS     250MSPS     210MSPS     250MSPS     250MSPS     210MSPS     250MSPS     210MSPS     250MSPS    
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    
71.8     70.4     70.4     72.4     72.4     69.7     70.5     70.3     72.8     72.7    
790     628     687     628     687     790     1140     1250     1140     1250    
700     700     700     700     700     700     700     700     700     700    
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    
1.7     1.7     1.7     1.7     1.7     1.7     1.7     1.7     1.7     1.7    
1.9     1.9     1.9     1.9     1.9     1.9     1.9     1.9     1.9     1.9    
3     3     3     3     3     3     3.15     3.15     3.15     3.15    
3.6     3.6     3.6     3.6     3.6     3.6     3.6     3.6     3.6     3.6    
Ext
Int    
Ext
Int    
Ext
Int    
Ext
Int    
Ext
Int    
Ext
Int    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
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 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    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-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    
99.95 | 1ku     41.50 | 1ku     52.85 | 1ku     74.25 | 1ku     106.15 | 1ku     56.30 | 1ku     62.25 | 1ku     87.45 | 1ku     132.00 | 1ku     159.23 | 1ku    

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