ADS4249 Dual-Channel, 14-Bit, 250-MSPS Analog-to-Digital Converter (ADC) | TI.com

ADS4249 (ACTIVE)

Dual-Channel, 14-Bit, 250-MSPS Analog-to-Digital Converter (ADC)

 

Description

The ADS4249 is a member of the ADS42xx ultralow-power family of dual-channel, 12-bit and 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
  • Ultra-Low 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 ADCs (>10MSPS)

 
Sample Rate (Max) (MSPS)
Features
Resolution (Bits)
Number of input channels
SNR (dB)
ENOB (Bits)
SFDR (dB)
Power consumption (Typ) (mW)
Input range (Vp-p)
Interface
Operating temperature range (C)
Analog input BW (MHz)
Input buffer
Package Group
Package size: mm2:W x L (PKG)
Rating
Architecture
DNL (Typ) (+/-LSB)
INL (Typ) (+/-LSB)
Reference mode
ADS4249 ADS4222 ADS4225 ADS4226 ADS4229 ADS4242 ADS4245 ADS4246
250     65     125     160     250     65     125     160    
Low Power     Low Power     Low Power     Low Power     Low Power     Low Power     Low Power     Low Power    
14     12     12     12     12     14     14     14    
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    
470     183     277     332     470     183     277     332    
2     2     2     2     2     2     2     2    
DDR LVDS
Parallel CMOS    
DDR LVDS
Parallel CMOS    
DDR LVDS
Parallel CMOS    
DDR LVDS
Parallel CMOS    
DDR LVDS
Parallel CMOS    
DDR LVDS
Parallel CMOS    
DDR LVDS
Parallel CMOS    
DDR LVDS
Parallel CMOS    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
600     600     600     600     600     600     600     600    
No     No     No     No     No     No     No     No    
VQFN | 64     VQFN | 64     VQFN | 64     VQFN | 64     VQFN | 64     VQFN | 64     VQFN | 64     VQFN | 64    
64VQFN: 81 mm2: 9 x 9 (VQFN | 64)     64VQFN: 81 mm2: 9 x 9 (VQFN | 64)     64VQFN: 81 mm2: 9 x 9 (VQFN | 64)     64VQFN: 81 mm2: 9 x 9 (VQFN | 64)     64VQFN: 81 mm2: 9 x 9 (VQFN | 64)     64VQFN: 81 mm2: 9 x 9 (VQFN | 64)     64VQFN: 81 mm2: 9 x 9 (VQFN | 64)     64VQFN: 81 mm2: 9 x 9 (VQFN | 64)    
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