1.8V Analog-to-Digital Converter
Data Sheet
14-Bit, 20/40/65/80 MSPS, 1.8 V Analog-to-Digital Converter
AD9649
FEATURES
1.8 V analog supply operation 1...
Description
Data Sheet
14-Bit, 20/40/65/80 MSPS, 1.8 V Analog-to-Digital Converter
AD9649
FEATURES
1.8 V analog supply operation 1.8 V to 3.3 V output supply SNR
74.3 dBFS at 9.7 MHz input 71.5 dBFS at 200 MHz input SFDR 93 dBc at 9.7 MHz input 80 dBc at 200 MHz input Low power 45 mW at 20 MSPS 87 mW at 80 MSPS Differential input with 700 MHz bandwidth On-chip voltage reference and sample-and-hold circuit 2 V p-p differential analog input DNL = ±0.35 LSB Serial port control options Offset binary, gray code, or twos complement data format Integer 1, 2, or 4 input clock divider Built-in selectable digital test pattern generation Energy-saving power-down modes Data clock out (DCO) with programmable clock and data
alignment
APPLICATIONS
Communications Diversity radio systems Multimode digital receivers
GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, TD-SCDMA Smart antenna systems Battery-powered instruments Handheld scope meters Portable medical imaging Ultrasound Radar/LIDAR
RBIAS VCM
VIN+ VIN–
VREF SENSE
FUNCTIONAL BLOCK DIAGRAM
AVDD
GND SDIO SCLK CSB DRVDD
SPI
PROGRAMMING DATA ADC CORE
CMOS OUTPUT BUFFER
OR D13 (MSB) D0 (LSB) DCO
REF SELECT
DIVIDE BY 1, 2, 4
AD9649
MODE CONTROLS
08539-001
CLK+ CLK–
PDWN DFS MODE
Figure 1.
PRODUCT HIGHLIGHTS
1. The AD9649 operates from a single 1.8 V analog power supply and features a separate digital output driver supply to accommodate 1.8 V to 3.3 V logic families.
2. The sample-and-hold circuit maintains excellent performance for input frequenc...
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