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ADS4222, ADS4225, ADS4226 ADS4242, ADS4245, ADS4246
SBAS533D – MARCH 2011 – REVISED DECEMBER 2015
ADS42xx Dual-Channel, 14-/12-Bit, 160/125/65 MSPS Ultralow-Power ADC
1 Features
•1 Ultralow Power With Single 1.8-V Supply, CMOS Output: – 183 mW Total Power at 65 MSPS – 277 mW Total Power at 125 MSPS – 332 mW Total Power at 160 MSPS
• High Dynamic Performance: – 88-dBc SFDR at 170 MHz – 71.4-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: VQFN-64 (9.00 mm × 9.00 mm)
2 Applications
• Wireless Communications Infrastructure • Software-Defined Radio • Power Amplifier Linearization
3 Description
The ADS424x and ADS422x family of devices are low-speed variants of the ADS42xx ultralow-power family of dual-channel, 14-bit/12-bit analog-to-digital converters (ADCs). Innovative design techniques are used to achieve high-dynamic performance, while consuming extremely low power with 1.8-V supply. This topology makes the ADS424x/422x well-suited for multi-carrier, wide-bandwidth communications applications.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
ADS4222
ADS4225
ADS4226 ADS4242
VQFN (48)
9.00 mm × 9.00 mm
ADS4245
ADS4246
(1) For all available packages, see the orderable addendum at the end of the data sheet.
INP_A INM_A
CLKP CLKM
INP_B INM_B
VCM
ADS4222/25/26/42/45/46 Block Diagram
AVDD AGND
DRVDD DRGND LVDS Interface
Sampling Circuit
14-Bit ADC
Digital and DDR
Serializer
CLOCKGEN
Output Clock Buffer
Sampling Circuit
14-Bit ADC
Digital and DDR
Serializer
ADS424x
Reference
Control Interface
DA0P DA0M DA2P DA2M DA4P DA4M DA6P DA6M DA8P DA8M DA10P DA10M DA12P DA12M
CLKOUTP CLKOUTM
DB0P DB0M DB2P DB2M DB4P DB4M DB6P DB6M DB8P DB8M DB10P DB10M DB12P DB12M
SDOUT
RESET SCLK SEN
SDATA CTRL1 CTRL2 CTRL3
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA.
ADS4222, ADS4225, ADS4226 ADS4242, ADS4245, ADS4246
SBAS533D – MARCH 2011 – REVISED DECEMBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Description (continued)......................................... 3 6 ADS424x/422x Family Comparison...................... 4 7 Pin Configuration and Functions ......................... 5 8 Specifications....................................................... 10
8.1 Absolute Maximum Ratings .................................... 10 8.2 ESD Ratings............................................................ 10 8.3 Recommended Operating Conditions..................... 11 8.4 Thermal Information ................................................ 11 8.5 Electrical Characteristics: ADS4246, ADS4245,
ADS4242.................................................................. 12 8.6 Electrical Characteristics: ADS4226, ADS4225,
ADS4222.................................................................. 15 8.7 Electrical Characteristics: General .......................... 18 8.8 Digital Characteristics ............................................. 19 8.9 Timing Requirements: LVDS and CMOS Modes.... 19 8.10 Serial Interface Timing Characteristics ................. 20 8.11 Reset Timing (Only When Serial Interface Is
Used)........................................................................ 20 8.12 Typical Characteristics .......................................... 25 9 Detailed Description ............................................ 49 9.1 Overview ................................................................. 49
9.2 Functional Block Diagrams ..................................... 49 9.3 Feature Description................................................. 51 9.4 Device Functional Modes........................................ 57 9.5 Programming........................................................... 58 9.6 Register Maps ......................................................... 67 10 Application and Implementation........................ 79 10.1 Application Information.......................................... 79 10.2 Typical Application ............................................... 80 11 Power Supply Recommendations ..................... 83 11.1 Sharing DRVDD and AVDD Supplies ................... 83 11.2 Using DC.