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ADS4229_15

更新时间： 2024-09-17 02:58:35
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德州仪器 - TI /
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67页 1289K
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Dual-Channel, 12-Bit, 250-MSPS Ultralow-Power ADC

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ADS4229_15 数据手册

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ADS4229  
www.ti.com  
SBAS550A –JUNE 2011–REVISED OCTOBER 2011  
Dual-Channel, 12-Bit, 250-MSPS Ultralow-Power ADC  
Check for Samples: ADS4229  
1
FEATURES  
APPLICATIONS  
23  
•
Maximum Sample Rate: 250 MSPS  
•
•
•
Wireless Communications Infrastructure  
Software Defined Radio  
•
Ultralow Power with Single 1.8-V Supply:  
–
545-mW Total Power at 250 MSPS  
Power Amplifier Linearization  
•
High Dynamic Performance:  
DESCRIPTION  
The ADS4229 is  
–
–
80-dBc SFDR at 170 MHz  
69.8-dBFS SNR at 170 MHz  
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  
ADS4229 well-suited for multi-carrier, wide-bandwidth  
communications applications.  
•
•
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  
The ADS4229 has gain options that can be used to  
improve SFDR performance at lower full-scale input  
Double Data Rate (DDR) LVDS with  
Programmable Swing:  
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.  
–
–
Standard Swing: 350 mV  
Low Swing: 200 mV  
•
•
Supports Low Input Clock Amplitude  
Down to 200 mVPP  
The device includes internal references while the  
traditional reference pins and associated decoupling  
capacitors have been eliminated. The ADS4229 is  
specified over the industrial temperature range  
(–40°C to +85°C).  
Package: 9-mm × 9-mm, 64-Pin Quad Flat  
No-Lead (QFN) Package  
ADS424x/2x Family Comparison(1)  
65 MSPS  
125 MSPS  
160 MSPS  
250 MSPS  
ADS422x  
12-bit family  
ADS4222  
ADS4225  
ADS4226  
ADS4229  
ADS424x  
14-bit family  
ADS4242  
ADS4245  
ADS4246  
ADS4249  
(1) See Table 1 for details on migrating from the ADS62P49 family.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PowerPAD is a trademark of Texas Instruments Incorporated.  
2
3
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2011, Texas Instruments Incorporated  
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