Datasheet for AD6655-125EBZ:
- Manufacturer Part Number : AD6655-125EBZ
- Manufacturer : AD
- Description : IF Diversity Receiver IC
- Series : AD6649
- Reference Price : USD 0
- Our Price : We have a better price, contact us by email
- Product Type : Integrated/Special Purpose A/D Converters
- Function : IF/RF Receivers
- Current Suggest : Recommended for New Designs
- Status : Last Time Buy
- ROHS Status : ROHS Compliant (Lead Free)
- Package Type : Evaluation Board
- Pins : -
- MFG Package Case : -
- Part Type : EVAL
- Standard Packing Type : -
- Standard Packing Quantity : -
- Working Temperature : -
- Other Part Number : AD6655-125EBZ
- Shipping methods : DHL FEDEX UPS TNT
- Delivery Time : Ship within 1 day.
- Manufacturer Production time : 6-8 weeks (Normally have stocks)
- Weight : 0.001KG
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- SNR = 73.0 dBFS in a 95 MHz BW at 185 MHz Ain and
245.76 MSPS - SFDR = 85 dBc at 185 MHz Ain and 250 MSPS
- -151.2 dBFS/Hz Input Noise @ 220 MHz, -1dBFS Ain and 250MSPS
- Total Power consumption: 1W
- 1.8 V analog and LVDS output supply operation
- Integer 1-to-8 input clock divider (625Mhz maximum input)
- Integrated dual-channel ADC
-- Sample rates up to 250 MSPS
-- IF sampling frequencies to 400 MHz
- Integrated wideband digital downconverter (DDC)
-- 32-bit complex, numerically controlled oscillator (NCO)
-- Sample Rate Converter and FIR filter with two modes
-- Real Output from an fs/4 output NCO - Fast detect bits for efficient AGC implementation
- Energy-saving power-down modes
- Decimated Interleaved ‘Real’ LVDS Data Outputs
-- See datasheet for additional features
The dual ADC core features a multistage, differential pipelinedarchitecture with integrated output error correction logic. Each ADC features wide bandwidth inputs supporting a variety of user-selectable input ranges. An integrated voltage reference eases design considerations. A duty cycle stabilizer is provided to compensate for variations in the ADC clock duty cycle, allowing the converters to maintain excellent performance.
ADC data outputs are internally connected directly to the digitaldownconverter (DDC) of the receiver. The digital receiver has two channels and provides processing flexibility. Each receive channel has four cascaded signal processing stages: a 32-bit frequency translator (numerically controlled oscillator (NCO), an optional sample rate converter, a fixed FIR filter, and an fs/4 fixed-frequency NCO.
In addition to the receiver DDC, the AD6649 has several functions that simplify the automatic gain control (AGC) function in the system receiver. The programmable threshold detector allows monitoring of the incoming signal power using the fast detect output bits of the ADC. If the input signal level exceeds the programmable threshold, the fast detect indicator goes high. Because this threshold indicator has low latency, the user can quickly turn down the system gain to avoid an overrange condition at the ADC input.
After digital processing, data is routed directly to the 14-bit output port. These outputs operate at 1.8 V LVDS signal levels.
The AD6649 receiver digitizes a wide spectrum of IF frequencies.Each receiver is designed for simultaneous reception of the main channel and the diversity channel. This IF sampling architecture greatly reduces component cost and complexity compared with traditional analog techniques or less integrated digital methods. In diversity applications the output data format is real due to the final NCO which shifts the output center frequency to fs/4.
Flexible power-down options allow significant power savings,when desired.
Programming for setup and control is accomplished using a 3-pinSPI-compatible serial interface.
The AD6649 is available in a 64-lead LFCSP and is specified overthe industrial temperature range of −40°C to +85°C.
APPLICATIONS- Communications
- Diversity radio systems
- Multimode digital receivers (3G)
TD-SCDMA, WiMax, WCDMA,
CDMA2000, GSM, EDGE, LTE - General-purpose software radios
- Broadband data applications
PRODUCT HIGHLIGHTS
- Integrated dual, 14-bit, 250 MSPS ADC.
- Integrated wideband decimation filter and 32-bitcomplex NCO.
- Fast overrange and threshold detect.
- Proprietary differential input maintains excellent SNRperformance for input frequencies up to 300 MHz.
- SYNC input allows synchronization of multiple devices.
- 3-pin, 1.8V SPI port for register programming and registerreadback.
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
