14-Bit 250MSPS Dual Low Power ADC  - ADS4249

ADS4249 (ACTIVE)

14-Bit 250MSPS Dual Low Power ADC

Description

The ADS4249 is a member of the ADS42xx ultralow-power family of dual-channel, 12-bit/14-bit analog-to-digital converters (ADCs). Innovative design techniques are used to achieve high dynamic performance, while consuming extremely low power with a 1.8-V supply. This topology makes the ADS4249 well-suited for multi-carrier, wide-bandwidth communications applications.

The ADS4249 has gain options that can be used to improve SFDR performance at lower full-scale input ranges. This device also includes a dc offset correction loop that can be used to cancel the ADC offset. Both DDR LVDS and parallel CMOS digital output interfaces are available in a compact QFN-64 PowerPAD™ package.

The device includes internal references while the traditional reference pins and associated decoupling capacitors have been eliminated. The ADS4249 is specified over the industrial temperature range (–40°C to +85°C).

Features

  • Maximum Sample Rate: 250 MSPS
  • Ultralow Power with Single 1.8-V Supply:
    • 560-mW Total Power at 250 MSPS
  • High Dynamic Performance:
    • 80-dBc SFDR at 170 MHz
    • 71.7-dBFS SNR at 170 MHz
  • Crosstalk: > 90 dB at 185 MHz
  • Programmable Gain Up to 6 dB for
    SNR/SFDR Trade-off
  • DC Offset Correction
  • Output Interface Options:
    • 1.8-V Parallel CMOS Interface
    • Double Data Rate (DDR) LVDS with Programmable Swing:
      • Standard Swing: 350 mV
      • Low Swing: 200 mV
  • Supports Low Input Clock Amplitude
    Down to 200 mVPP
  • Package: 9-mm × 9-mm, 64-Pin Quad Flat No-Lead (QFN) Package

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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$)
ADS4249 ADS4222 ADS4225 ADS4226 ADS4229 ADS4242 ADS4245 ADS4246
14     12     12     12     12     14     14     14    
250MSPS     65MSPS     125MSPS     160MSPS     250MSPS     65MSPS     125MSPS     160MSPS    
2     2     2     2     2     2     2     2    
72.8     70.9     70.8     70.5     70.5     73.6     73.4     72.8    
11.7     11.5     11.5     11.4     11.3     11.9     11.9     11.8    
80     91     89     87     80     92     89     87    
72     70.8     70.7     70.4     70     73.5     73.2     72.6    
470     183     277     332     470     183     277     332    
600     600     600     600     600     600     600     600    
Pipeline     Pipeline     Pipeline     Pipeline     Pipeline     Pipeline     Pipeline     Pipeline    
1.7     1.5     1.5     1.5     1.5     1.7     1.7     1.7    
5     3.5     3.5     3.5     3.5     5     5     5    
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    
1.7     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    
Int     Int     Int     Int     Int     Int     Int     Int    
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    
Parallel CMOS
Parallel LVDS    
Parallel CMOS
Parallel LVDS    
Parallel CMOS
Parallel LVDS    
Parallel CMOS
Parallel LVDS    
Parallel CMOS
Parallel LVDS    
Parallel CMOS
Parallel LVDS    
Parallel CMOS
Parallel LVDS    
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    
118.50 | 1ku     14.40 | 1ku     29.50 | 1ku     39.00 | 1ku     59.85 | 1ku     28.00 | 1ku     41.00 | 1ku     65.25 | 1ku    

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