ADS62PF49 Datasheet, PDF (1/8 Pages) Texas Instruments – Dual-Channel, 250-MSPS Feedback Receiver IC

ADS62PF49
www.ti.com
Dual-Channel, 250-MSPS Feedback Receiver IC
Check for Samples: ADS62PF49
SLAS779 – JUNE 2011
FEATURES
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• Maximum Output Sample Rate: 250 MSPS
• Pin-Compatible with ADS62P49
• Variable Output Resolution
– High Resolution Burst Mode with 14-Bit
Output: 73 dB SNR at Low IF,
70.5 dB SNR at 170 MHz
– Low Resolution with 9-Bit 250 MSPS or
11-Bit 125 MSPS
• Double Data Rate (DDR) LVDS Output
• Programmable Gain up to 6 dB for SNR/SFDR
Trade-off
• 90-dB Cross-Talk
• Power Consumption of 1.25 W
• 64-Pin QFN Package (9 mm × 9 mm)
APPLICATIONS
• Feedpath Path for Multi-Carrier, Multi-Mode
Cellular Infrastructure Base Stations
DESCRIPTION
The ADS62PF49 is a dual-channel feedback reciever
IC with sampling rates up to 250 MSPS. It allows a
high-resolution, 14-bit output for a limited time
followed by a low-resolution mode with a minimum of
8x longer time. It is pin-compatible to the ADS62P49
and ADS62C17 dual ADCs.
The ADS62PF49 has gain options that can be used
to improve SFDR performance at lower full-scale
input ranges. It includes a dc offset correction loop
that can be used to cancel the analog-to-digital
conversion (ADC) offset.
It includes internal references while the traditional
reference pins and associated decoupling capacitors
have been eliminated. The device is specified over
the industrial temperature range (–40°C to 85°C).
Table 1. Performance Summary
AT 170-MHz INPUT
PERFORMANCE IN HIGH-
RESOLUTION MODE
0-dB gain
75
SFDR, dBc
6-dB gain
82
0-dB gain
69.8
SINAD, dBFS
6-dB gain
66.5
ADS62PF49 Block Diagram
INP_A
INM_A
Sample &
Hold
Resolution/
Mode control
ADC
+
DDR
Serializer
CLKP
CLKM
Clockgen
INP_B
INM_B
Sample &
Hold
Resolution/
Mode control
ADC
+
DDR
Serializer
VCM
Control
Reference
Interface
DA0P/M
DA2P/M
DA4P/M
DA6P/M
DA8P/M
DA10P/M
DA12P/M
CLKOUTP/M
DB0P/M
DB2P/M
DB4P/M
DB6P/M
DB8P/M
DB10P/M
DB12P/M
SDOUT
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated