Datasheet for AD6657AEBZ:
- Manufacturer Part Number : AD6657AEBZ
- Manufacturer : AD
- Description : 65MHz Bandwidth Quad IF Receiver IC
- Series : AD6657A
- 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 : Production
- 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 : AD6657AEBZ
- 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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- 11-bit, 200 MSPS output data rate per channel
- Integrated noise shaping requantizer
- Performance with NSR enabled
- SNR: 75.5 dBFS in 40 MHz band to 70 MHz at 185 MSPS
- SNR: 73.7 dBFS in 60 MHz band to 70 MHz at 185 MSPS
- SNR: 70.0 dBFS in 65 MHz band to 70 MHz at 185 MSPS - Performance with NSR disabled
- SNR: 66.5 dBFS to 70 MHz at 185 MSPS
- SFDR: 89 dBc to 70 MHz at 185 MSPS
- Low power: 1.2 W at 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)
- See data sheet for additional features
The device consists of four high performance ADCs and NSR digital blocks. Each ADC consists of a multistage, differential pipelined architecture with integrated output error correction logic. The ADC features a wide bandwidth switched capacitor sampling network within the first stage of the differential pipeline. An integrated voltage reference eases design considerations. A duty cycle stabilizer (DCS) compensates for variations in the ADC clock duty cycle, allowing the converters to maintain excellent performance.
Each ADC output is connected internally to an NSR block. The integrated NSR circuitry allows for improved SNR performance in a smaller frequency band within the Nyquist bandwidth. The device supports two different output modes selectable via the external MODE pin or the SPI.
With the NSR feature enabled, the outputs of the ADCs are processed such that the AD6657A supports enhanced SNR per¬formance within a limited portion of the Nyquist bandwidth while maintaining an 11-bit output resolution. The NSR block can be programmed to provide a bandwidth of either 22%, 33%, or 36% of the sample clock. For example, with a sample clock rate of 185 MSPS, the AD6657A can achieve up to 75.5 dBFS SNR for a 40 MHz bandwidth in the 22% mode, up to 73.7 dBFS SNR for a 60 MHz bandwidth in the 33% mode, or up to 70.0 dBFS SNR for a 65 MHz bandwidth in the 36% mode.
With the NSR block disabled, the ADC data is provided directly to the output with a resolution of 11 bits. The AD6657A can achieve up to 66.5 dBFS SNR for the entire Nyquist bandwidth when operated in this mode. This allows the AD6657A to be used in telecommunication applications such as a digital predistortion observation path where wider bandwidths are used.
After digital signal processing, multiplexed output data is routed into two 11-bit output ports such that the maximum data rate is 400 Mbps (DDR). These outputs are set at 1.8 V LVDS and support ANSI-644 levels.The AD6657A receiver digitizes a wide spectrum of IF frequencies. Each receiver is designed for simultaneous reception of a separate antenna. This IF sampling architecture greatly reduces component cost and complexity compared with traditional analog techniques or less integrated digital methods.
Flexible power-down options allow significant power savings. Programming for device setup and control is accomplished using a 3-wire SPI-compatible serial interface with numerous modes to support board level system testing.
The AD6657A is available in a Pb-free, RoHS-compliant, 144 ball, 10 mm × 10 mm chip scale package ball grid array (CSP_BGA) that is specified over the industrial temperature range of −40°C to +85°C.
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
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.
