Datasheet

ADS4122, ADS4125
ADS4142, ADS4145
SBAS520A –FEBRUARY 2011– REVISED MARCH 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
PRODUCT LEAD DESIGNATOR RANGE ECO PLAN
(2)
FINISH MARKING NUMBER MEDIA
ADS4122IRGZR Tape and reel
GREEN (RoHS,
ADS4122 QFN-48 RGZ –40°C to +85°C Cu/NiPdAu AZ4122
no Sb/Br)
ADS4122IRGZT Tape and reel
ADS4125IRGZR Tape and reel
GREEN (RoHS,
ADS4125 QFN-48 RGZ –40°C to +85°C Cu/NiPdAu AZ4125
no Sb/Br)
ADS4125IRGZT Tape and reel
ADS4142IRGZR Tape and reel
GREEN (RoHS,
ADS4142 QFN-48 RGZ –40°C to +85°C Cu/NiPdAu AZ4142
no Sb/Br)
ADS4142IRGZT Tape and reel
ADS4145IRGZR Tape and reel
GREEN (RoHS,
ADS4145 QFN-48 RGZ –40°C to +85°C Cu/NiPdAu AZ4145
no Sb/Br)
ADS4145IRGZT Tape and reel
(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 to 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 ADS4145 FAMILY
PINS
Pin 21 is NC (not connected) Pin 21 is NC (not connected)
Pin 23 is MODE Pin 23 is RESERVED in the ADS4145 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): ADS4122 ADS4125 ADS4142 ADS4145