GENERAL DESCRIPTION

The AD9257 is an octal, 14-bit, 40 MSPS and 65 MSPS analog-to-digital converter (ADC) with an on-chip sample-and-hold circuit designed for low cost, low power, small size, and ease of use. The product operates at a conversion rate of up to 65 MSPS and is optimized for outstanding dynamic performance and low power in applications where a small package size is critical.

FEATURES

Low power: 55 mW per channel at 65 MSPS with scalable

power options

SNR = 75.5 dB (to Nyquist)

SFDR = 91.6 dBc (to Nyquist)

DNL = ±0.6 LSB (typical), INL = ±1.1 LSB (typical)

Serial LVDS (ANSI-644, default)

Low power, reduced signal option (similar to IEEE 1596.3)

Data and frame clock outputs

650 MHz full power analog bandwidth

2 V p-p input voltage range

1.8 V supply operation

Serial port control

Full chip and individual channel power-down modes

Flexible bit orientation

Built-in and custom digital test pattern generation

Programmable clock and data alignment

Programmable output resolution

Standby mode

APPLICATIONS

Medical imaging and nondestructive ultrasound

Portable ultrasound and digital beam-forming systems

Quadrature radio receivers

Diversity radio receivers

Optical networking

Test equipment