Medical imaging/ultrasound Automotive radar
The AD9271 is designed for low cost, low power, small size, and ease of use. It contains eight channels of a variable gain amp-lifier (VGA) with low noise preamplifier (LNA); an antialiasing filter (AAF); and a 12-bit, 10 MSPS to 50 MSPS analog-to-digital converter (ADC).
Each channel features a variable gain range of 30 dB, a fully differential signal path, an active input preamplifier termination, a maximum gain of up to 40 dB, and an ADC with a conversion rate of up to 50 MSPS. The channel is optimized for dynamic performance and low power in applications where a small package size is critical.
The LNA has a single-ended-to-differential gain that is selectable through the SPI. The LNA input noise is typically 1.2 nV/√Hz, and the combined input-referred noise of the entire channel is 1.4 nV/√Hz at maximum gain. Assuming a 15 MHz noise bandwidth (NBW) and a 15.6 dB LNA gain, the input SNR is roughly 86 dB. In CW Doppler mode, the LNA output drives a transconductance amp that is switched through an 8 × 6 differential crosspoint switch. The switch is programmable through the SPI.
Applications
Features and Benefits
| Application Specific |
| Document | note |
| AD9271: Octal LNA/VGA/AAF/ADC and Crosspoint Switch Data Sheet (Rev. B) | PDF 2195 kB |
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|---|---|---|---|---|---|
| AD9271BSVZ-40 Production | 100 ld TQFP w/ 9.5mm exposed pad | OTH 90 | -40 to 85C | 54.12 | 46 | Y |
| AD9271BSVZ-50 Production | 100 ld TQFP w/ 9.5mm exposed pad | OTH 90 | -40 to 85C | 58.82 | 50 | Y |
| AD9271BSVZRL-25 Obsolete | 100 ld TQFP w/ 9.5mm exposed pad | REEL 1000 | 0 | 0 | Y | |
| AD9271BSVZRL-40 Production | 100 ld TQFP w/ 9.5mm exposed pad | REEL 1000 | -40 to 85C | 0 | 46 | Y |
| AD9271BSVZRL-50 Obsolete | 100 ld TQFP w/ 9.5mm exposed pad | REEL 1000 | 0 | 0 | Y |
