Datasheet
ADS4126
,
ADS4129
ADS4146
,
ADS4149
SBAS483G – NOVEMBER 2009–REVISED JANUARY 2011
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
ORDERING INFORMATION
(1)
SPECIFIED
PACKAGE- PACKAGE TEMPERATURE LEAD/BALL PACKAGE ORDERING TRANSPORT MEDIA,
PRODUCT LEAD DESIGNATOR RANGE ECO PLAN
(2)
FINISH MARKING NUMBER QUANTITY
ADS4126IRGZR Tape and reel, 2500
GREEN (RoHS, no
ADS4126 QFN-48 RGZ –40°C to +85°C Cu/NiPdAu AZ4126
Sb/Br)
ADS4126IRGZT Tape and reel, 250
ADS4129IRGZR Tape and reel, 2500
GREEN (RoHS, no
ADS4129 QFN-48 RGZ –40°C to +85°C Cu/NiPdAu AZ4129
Sb/Br)
ADS4129IRGZT Tape and reel, 250
ADS4146IRGZR Tape and reel, 2500
GREEN (RoHS, no
ADS4146 QFN-48 RGZ –40°C to +85°C Cu/NiPdAu AZ4146
Sb/Br)
ADS4146IRGZT Tape and reel, 250
ADS4149IRGZR Tape and reel, 2500
GREEN (RoHS, no
ADS4149 QFN-48 RGZ –40°C to +85°C Cu/NiPdAu AZ4149
Sb/Br)
ADS4149IRGZT Tape and reel, 250
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or visit the
device product folder at www.ti.com.
(2) Eco Plan is the planned eco-friendly classification. Green (RoHS, no Sb/Br): TI defines Green to mean Pb-Free (RoHS compatible) and
free of Bromine- (Br) and Antimony- (Sb) based flame retardants. Refer to the Quality and Lead-Free (Pb-Free) Data web site for more
information.
The ADS412x/4x family is pin-compatible with the previous generation ADS6149 family; this architecture enables
easy migration. However, there are some important differences between the generations, summarized in Table 1.
Table 1. MIGRATING FROM THE ADS6149 FAMILY
ADS6149 FAMILY ADS4149 FAMILY
PINS
Pin 21 is NC (not connected) Pin 21 is NC (not connected)
Pin 23 is MODE Pin 23 is RESERVED in the ADS4149 family. It is reserved as a digital control pin for an (as yet) undefined function in the
next-generation ADC series.
SUPPLY
AVDD is 3.3V AVDD is 1.8V
DRVDD is 1.8V No change
INPUT COMMON-MODE VOLTAGE
VCM is 1.5V VCM is 0.95V
SERIAL INTERFACE
Protocol: 8-bit register address and 8-bit register data No change in protocol
New serial register map
EXTERNAL REFERENCE MODE
Supported Not supported
ADS61B49 FAMILY ADS41B29/B49/ADS58B18 FAMILY
PINS
Pin 21 is NC (not connected) Pin 21 is 3.3V AVDD_BUF (supply for the analog input buffers)
Pin 23 is a digital control pin for the RESERVED function.
Pin 23 is MODE
Pin 23 functions as SNR Boost enable (B18 only).
SUPPLY
AVDD is 3.3V AVDD is 1.8V, AVDD_BUF is 3.3V
DRVDD is 1.8V No change
INPUT COMMON-MODE VOLTAGE
VCM is 1.5V VCM is 1.7V
SERIAL INTERFACE
No change in protocol
Protocol: 8-bit register address and 8-bit register data
New serial register map
EXTERNAL REFERENCE MODE
Supported Not supported
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Product Folder Link(s): ADS4126 ADS4129 ADS4146 ADS4149