AD9273 is an eight-channel low-noise preamplifier, variable gain amplifier, anti-aliasing filter, and analog-to-digital converter and crosspoint switch combination from ADI. It has a 12-bit 10 MSPS to 50 MSPS ADC, SNR of 70 dB, and SFDR of 75 dB.
The AD9273 integrates eight channels of low‑noise preamplifier, variable gain amplifier, antialiasing filter and a 12‑bit ADC. It offers programmable gain, dual‑mode input matching, and a built‑in 8 × 8 differential crosspoint switch for continuous‑wave Doppler applications. The device is supplied in a 100‑lead TQFP package and targets low‑cost, low‑power, compact designs.
Typical applications include medical ultrasound imaging and automotive radar. The handbook provides feature tables, functional block diagrams, and detailed electrical specifications for designers.
| Number of channels | 8 |
|---|---|
| Input‑referred noise voltage | 1.2 nV/VHz |
| Maximum gain (LNA) | 21.3 dB @ 5 MHz typical |
| SPI‑programmable gain steps | 15.6 dB / 17.9 dB / 21.3 dB |
| Input voltage range | 733 mV p‑p / 550 mV p‑p / 367 mV p‑p |
| Bandwidth | > 100 MHz |
| Full‑scale output | 4.4 V p‑p differential |
| Attenuator range | ‑42 dB to 0 dB |
| PGA gain options | 21 dB / 24 dB / 27 dB / 30 dB |
| Low‑pass filter programmable range | 8 MHz to 18 MHz |
| ADC resolution and speed | 12 bits at 10 MSPS to 50 MSPS |
| Signal‑to‑noise ratio (SNR) | 70 dB |
| Spurious‑free dynamic range (SFDR) | 75 dB |
| Power consumption per channel (12‑bit/40 MSPS) | 109 mW |
| Power consumption per channel (CW Doppler) | 70 mW |
| Package | 100‑lead TQFP |
The AD9273 has an input‑referred noise voltage of 1.2 nV/VHz.
The device provides a bandwidth greater than 100 MHz.
The AD9273’s 12‑bit ADC operates from 10 MSPS up to 50 MSPS.
Each channel uses 109 mW at 12‑bit/40 MSPS and 70 mW in CW Doppler mode.