 |
 |
|
 |
 |
||
|
Volume 9, Issue 2 | YOUR SEMICONDUCTOR SOLUTIONS RESOURCE |
|
||
|
C o n t e n t s 16-Bit ADCs Deliver Ease of Use >> Benefits of Continuous Time Σ-Δ ADCs >> 24-Bit Σ-Δ ADC for Faster Precision Measurement >> High Speed ADCs Use 50% Less PCB Surface >> Receivers Optimize Image Quality and Power >> Pin-Programmable, Low Power Σ-Δ ADC Is Easy to Implement >> ADC Simulation, Software, and Behavioral Tools >> New Family of PulSAR ADCs Delivers High Resolution >> Dual Channel, SAR ADCs with Highest Performance at Lowest Power >> Top Considerations for Avoiding Differential ADC Driver Accidents >> ADC Drivers Designed to Get Peak Performance Out of Your ADC >> VGAs for Driving High Speed ADCs >> Fully Differential IF Amplifiers >> Current Feedback Differential ADC Drivers for High Gain >> 16-Bit ADC Driver Simplifies Signal Conditioning >> ADC Driver Supports Converter Performance >> All prices in this bulletin are in USD in quantities greater than 1000 (unless otherwise noted), recommended lowest grade resale, FOB U.S.A.
|
|
|
|
Differential Variable Gain Amplifiers for Driving High Speed ADCs
Fully Differential IF Amplifiers Drive High IF Sampling ADCs The ADL5561 and ADL5562 are fully differential IF amplifiers designed to be used in driving high IF sampling ADCs within wireline and wireless communications systems. The next generation of high speed 12-bit to 16-bit ADCs, such as the AD946x, AD944x, AD9246 single family; AD9640/AD6655 dual family; and the AD9251 dual family support wider bandwidths and higher IF sampling critical for wideband high data rate next generation communications systems, such as 3G long-term evolution (LTE) and next generation mobile networks such as NGMN. Driving high performance wideband ADCs at higher IF frequencies is challenging and often employs the use of passive transformers to provide the single-ended-to-differential conversion and high linearity GaAs amplifiers. The ADL5561 and ADL5562 are fully differential IF amplifiers, ideally suited to meeting the demands of driving high resolution 12-bit to 16-bit, high IF sampling, >70 MHz ADCs, providing the lowest distortion, highest linearity, and lowest power solution available. Unlike amplifiers currently on the market, the ADL5561 and ADL5562 allow the user to select one of three gains settings of 6 dB, 12 dB, and 15.5 dB, fully specified and characterized over commonly used IF frequencies. The ADL5561 is the lower power device consuming just 40 mA and is ideally suited for use in power-sensitive, <140 MHz applications. The ADL5562 consumes 80 mA and provides a pin-compatible upgrade offering the highest dynamic range for 70 MHz to 500 MHz IF applications. Both the ADL5561 and ADL5562 operate from a 3 V supply, helping to minimize power consumption. Available in 16-lead, 3 mm × 3 mm LFCSP packaging, these devices save considerable board space and external component count compared to competing solutions.
|
|
