AD9246

www.DataSheet4U.com 14-Bit, 80 MSPS/105 MSPS/125 MSPS, 1.8 V Analog-to-Digital Converter AD9246 FEATURES 1.8 V analog supply operation 1.8 V to 3.3 V output supply SNR = 71.7 dBc (72.7 dBFS) to 70 MHz input SFDR = 85 dBc to 70 MHz input Low power: 395 mW @ 125 MSPS Differential input with 650 MHz bandwidth On-chip voltage reference and sample-and-hold amplifier DNL = ±0.4 LSB Flexible analog input: 1 V p-p to 2 V p-p range Offset binary, Gray code, or twos complement data format Clock duty cycle stabilizer Data output clock Serial port control Built-in selectable digital test pattern generation Programmable clock and data alignment FUNCTIONAL BLOCK DIAGRAM AVDD DRVDD AD9246 VIN+ VIN– SHA MDAC1 4 REFT REFB CORRECTION LOGIC 15 OUTPUT BUFFERS VREF SENSE REF SELECT DCO D13 (MSB) D0 (LSB) 0.5V CLOCK DUTY CYCLE STABILIZER MODE SELECT SCLK/DFS SDIO/DCS CSB 05491-001 8-STAGE 1 1/2-BIT PIPELINE 8 A/D 3 A/D OR AGND CLK+ CLK– PDWN DRGND APPLICATIONS Ultrasound equipment IF sampling in communications receivers IS-95, CDMA-One, IMT-2000 Battery-powered instruments Hand-held scopemeters Low cost digital oscilloscopes Figure 1. GENERAL DESCRIPTION The AD9246 is a monolithic, single 1.8 V supply, 14-bit, 80 MSPS/ 105 MSPS/125 MSPS analog-to-digital converter (ADC), featuring a high performance sample-and-hold amplifier (SHA) and on-chip voltage reference. The product uses a multistage differential pipeline architecture with output error correction logic to provide 14-bit accura...