SBAS558C
December 2012 – December 2015
ADS42B49
PRODUCTION DATA.
1
Features
2
Applications
3
Description
4
Revision History
5
Description (continued)
6
ADS424x and ADS422x Family Comparison
7
Pin Configuration and Functions
8
Specifications
8.1
Absolute Maximum Ratings
8.2
ESD Ratings
8.3
Recommended Operating Conditions
8.4
Thermal Information
8.5
Electrical Characteristics: ADS42B49 (250 MSPS)
8.6
Electrical Characteristics: General
8.7
Digital Characteristics
8.8
Timing Requirements: LVDS and CMOS Modes
8.9
Serial Interface Timing Characteristics
8.10
Reset Timing (Only When Serial Interface is Used)
8.11
LVDS Timings at Lower Sampling Frequencies
8.12
CMOS Timings at Lower Sampling Frequencies
8.13
Typical Characteristics
8.13.1
ADS42B49
8.13.2
Contour
9
Parameter Measurement Information
10
Detailed Description
10.1
Overview
10.2
Functional Block Diagram
10.3
Feature Description
10.3.1
Migrating from the ADS62P49 and ADS4249
10.3.2
Digital Functions
10.3.3
Gain for SFDR and SNR Trade-Off
10.3.4
Offset Correction
10.4
Device Functional Modes
10.4.1
Power-Down
10.4.1.1
Global Power-Down
10.4.1.2
Channel Standby
10.4.1.3
Input Clock Stop
10.4.2
Digital Output Information
10.4.2.1
Output Interface
10.4.2.2
DDR LVDS Outputs
10.4.2.3
LVDS Buffer
10.4.2.4
Parallel CMOS Interface
10.4.2.5
CMOS Interface Power Dissipation
10.4.2.6
Multiplexed Mode of Operation
10.4.2.7
Output Data Format
10.4.3
Parallel Configuration Details
10.5
Programming
10.5.1
Parallel Configuration Only
10.5.2
Serial Interface Configuration Only
10.5.3
Using Both Serial Interface and Parallel Controls
10.5.4
Serial Interface Details
10.5.4.1
Register Initialization
10.5.4.2
Serial Register Readout
10.6
Register Maps
10.6.1
Register Description
11
Application and Implementation
11.1
Application Information
11.1.1
Driving Circuit
11.1.1.1
Drive Circuit Requirements
11.1.2
Clock Input
11.2
Typical Application
11.2.1
Design Requirements
11.2.2
Detailed Design Procedure
11.2.2.1
Analog Input
11.2.2.2
Clock Driver
11.2.2.3
Digital Interface
11.2.3
Application Curves
12
Power Supply Recommendations
12.1
Using DC/DC Power Supplies
12.2
Power Supply Bypassing
13
Layout
13.1
Layout Guidelines
13.1.1
Grounding
13.1.2
Supply Decoupling
13.1.3
Exposed Pad
13.1.4
Routing Analog Inputs
13.2
Layout Example
14
Device and Documentation Support
14.1
Device Support
14.1.1
Device Nomenclature
14.2
Documentation Support
14.2.1
Related Documentation
14.3
Community Resources
14.4
Trademarks
14.5
Electrostatic Discharge Caution
14.6
Glossary
15
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RGC|64
MPQF125F
Thermal pad, mechanical data (Package|Pins)
RGC|64
QFND123N
Orderable Information
sbas558c_oa
sbas558c_pm
6 ADS424x and ADS422x 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
,
ADS42B49
(with analog input buffers)
(1) See
Migrating from the ADS62P49 and ADS4249
for details on migrating from the
ADS62P49
family.