Information

44 | Signal Chain Guide 2013 Texas Instruments
Data Converters
Analog-to-Digital Converters – Pipeline ADCs
Dual 16-Bit 250 MSPS Analog-to-Digital Converter
ADS42JB46/69
The ADS42JB49/69 is a family of high linearity dual channel 14- and 16-bit, 250 MSPS
analog-to-digital converters (ADC). The ADS42xB49/69 family supports the JESD204B
serialinterfacewithdataratesupto3.125GbpsaswellasDDRandQDRLVDSinter-
faces. The buffered analog input provides uniform input impedance across a wide
fr
equency range while minimizing sample-and-hold glitch energy. A sampling clock
divider allows more flexibility for system clock architecture design. The ADS42JB49/69
provides excellent spurious-free dynamic range (SFDR) over a large input frequency
range with low power consumption.
ADS42JB69 functional block diagram
Get more information: www.ti.com/product/ADS42JB49,
www.ti.com/product/ADS42JB69
Key Features
• Dualchannel
• 14/16-bitresolution
• Maximumclockrate:250Msps
• JESD204Bserialinterface
Subclass 0, 1, 2 compliant up to
3.125 Gbps
2 to 4 lanes supporting up to
250 Msps
•
Analoginputbufferwithhigh
impedance Input
•
Flexibleinputclockbufferwithdivide
by 1,2,4
• 2Vppand2.5Vppdifferentialfull-scale
input (SPI programmable)
• 64-pinQFNpackage(9x9mm)
• Powerdissipation:775mW/ch
• Aperturejitter:85fsrms
• Channelisolation:100dB
Applications
• Broadbandwireless
• Communicationstestequipment
• Microwavereceivers
• Multicarrier,multimodecellular
receivers
• Radarandsmartantennaarrays
• Softwaredefinedradios
CLKINP/M
INAP/M
Configuration Registers
KLCS
NES
ATADS
TUODS
TESER
Common
Mode
VCM
DA1P/M
DB1P/M
DA0P/M
DB0P/M
14-bit
16-bit
ADC
JESD204B
Digital
INBP/M
14-bit
16-bit
ADC
Digital
Block
Gain
Test Modes
JESD204B
Digital
Digital
Block
Gain
Test Modes
ADS42JB49/69
SYSREFP/M
PLL
x10/x20
SYNCP
/M
Divide
by 1,2,4
OVRA
OVRB
NDP
ANA_NDP
EDOM
Delay