GENERAL DESCRIPTION

The AD6653 is a mixed-signal intermediate frequency (IF) receiver consisting of dual, 12-bit, 125 MSPS/150 MSPS ADCs and a wideband digital downconverter (DDC). The AD6653 is designed to support communications applications where low cost, small size, and versatility are desired.

FEATURES

SNR = 70.8 dBc (71.8 dBFS) in a 32.7 MHz BW at

70 MHz @ 150 MSPS

SFDR = 83 dBc to 70 MHz @ 150 MSPS

1.8 V analog supply operation

1.8 V to 3.3 V CMOS output supply or 1.8 V LVDS

output supply

Integer 1-to-8 input clock divider

Integrated dual-channel ADC

Sample rates up to 150 MSPS

IF sampling frequencies to 450 MHz

Internal ADC voltage reference

Integrated ADC sample-and-hold inputs

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

ADC clock duty cycle stabilizer

95 dB channel isolation/crosstalk

Integrated wideband digital downconverter (DDC)

32-bit, complex, numerically controlled oscillator (NCO)

Decimating half-band filter and FIR filter

Supports real and complex output modes

Fast attack/threshold detect bits

Composite signal monitor

Energy-saving power-down modes

APPLICATIONS

Communications

Diversity radio systems

Multimode digital receivers (3G)

TD-SCDMA, WiMax, WCDMA,

CDMA2000, GSM, EDGE, LTE

I/Q demodulation systems

Smart antenna systems

General-purpose software radios

Broadband data applications