Hot-selling and scarce AD6657BBCZ Quad IF Receiver 144-CSPBGA spot stock

Product Descriptions

The AD6657 is an 11-bit, 200 MSPS, quad-channel intermediatefrequency (IF) receiver specifically designed to support multiantenna systems in telecommunication applications where highdynamic range performance,low power,and small size are desired.

The device consists of four high performance analog-to-digitalconverters (ADCs) and noise shaping requantizer (NSR) digitalblocks. Each ADC consists of a multistage, differential pipelinedarchitecture with integrated output error correction logic . TheADC features a wide bandwidth switched-capacitor samplingnetwork within the first stage of the differential pipeline . Anintegrated voltage reference eases design considerations. A dutycycle stabilizer (DCS) compensates for variations in the ADCclock duty cycle, allowing the converters to maintain excellentperformance.

Each ADC output is connected internally to an NSR block . Theintegrated NSR circuitry allows for improved SNR performancein a smaller frequency band within the Nyquist bandwidth . Thedevice supports two different output modes selectable via theexternal MODE pin or the SPI .

Product Features

11-bit, 200 MSPS output data rate per channel

Integrated noise shaping requantizer (NSR)

Performance with NSR enabled

SNR: 75.5 dBFS in 40 MHz band to 70 MHz @ 185 MSPS

SNR: 73.7 dBFS in 60 MHz band to 70 MHz @ 185 MSPS

Performance with NSR disabled

SNR: 66.5 dBFS to 70 MHz @ 185 MSPS

SFDR: 83 dBc to 70 MHz @ 185 MSPS

Low power: 1.2 W @ 185 MSPS

1.8 V analog supply operation

1.8 V LVDS (ANSI-644 levels) output

1-to-8 integer clock divider

Internal ADC voltage reference

1.75 V p-p analog input range (programmable to 2.0 V p-p)

Differential analog inputs with 800 MHz bandwidth

95 dB channel isolation/crosstalk

Serial port control

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

Energy-saving power-down modes

Product Applications

Communications

Diversity radio and smart antenna (MIMO) systems

Multimode digital receivers (3G)

WCDMA, LTE, CDMA2000

WiMAX,TD-SCDMA

I/Q demodulation systems

General-purpose software radios

Product Specifications

Product Photos

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