GENERAL DESCRIPTION

The AD9258 is a dual, 14-bit, 80 MSPS/105 MSPS/125 MSPS analog-to-digital converter (ADC). The AD9258 is designed to support communications applications where high performance, combined with low cost, small size, and versatility, is desired.

FEATURES

SNR = 77.6 dBFS @ 70 MHz and 125 MSPS

SFDR = 88 dBc @ 70 MHz and 125 MSPS

Low power: 750 mW @ 125 MSPS

1.8 V analog supply operation

1.8 V CMOS or LVDS output supply

Integer 1-to-8 input clock divider

IF sampling frequencies to 300 MHz

−152.8 dBm/Hz small signal input noise with 200 Ω input

impedance @ 70 MHz and 125 MSPS

Optional on-chip dither

Programmable internal ADC voltage reference

Integrated ADC sample-and-hold inputs

Flexible analog input range: 1 V p-p to 2 V p-p

Differential analog inputs with 650 MHz bandwidth

ADC clock duty cycle stabilizer

95 dB channel isolation/crosstalk

Serial port control

User-configurable, built-in self-test (BIST) capability

Energy-saving power-down modes

APPLICATIONS

Communications

Diversity radio systems

Multimode digital receivers (3G)

GSM, EDGE, W-CDMA, LTE,

CDMA2000, WiMAX, TD-SCDMA

I/Q demodulation systems

Smart antenna systems

General-purpose software radios

Broadband data applications

Ultrasound equipment