Analog Devices Inc. ADA8282 Quad Channel LNA & PGA AFE
Analog Devices ADA8282 Analog Front End (AFE) features four parallel channels. Each channel includes a low noise preamplifier (LNA) and a programmable gain amplifier (PGA). The LNA and PGA combine to form a signal chain that offers a gain range of 18dB to 36dB in 6dB increments with a guaranteed minimum bandwidth of 5MHz. When using the highest power settings, the combined input referred voltage noise of the LNA and PGA channel is 3.4nV/√Hz at maximum gain. Designers can configure the ADA8282 AFE using four power modes which trade off power and noise performance to optimize the performance based on the end application. Specified over the automotive temperature range of −40°C to +125°C, the ADA8282 AFE is well-suited for automotive radar, adaptive cruise control, collision avoidance, blind-spot detection, self-parking, and electronic bumper applications.
Features
- 4 channels of low noise amplifiers (LNAs) followed by programmable gain amplifiers (PGAs)
- Minimum −3dB bandwidth of 5MHz
- Typical –3dB bandwidth of 42.3MHz
- Typical slew rate of 28V/μs
- Differential input and output
- Gain of 18dB to 36dB in 6dB steps
- Selectable low noise and low power modes
- Input referred noise of 4.5nV/√Hz at 18.3mW per channel
- Input referred noise of 3.8nV/√Hz at 26.5mW per channel
- Input referred noise of 3.6nV/√Hz at 34.8mW per channel
- Input referred noise of 3.4nV/√Hz at 54.8mW per channel
- Channel to channel gain matching of ±0.25dB
- Absolute gain error of ±0.5dB
- SPI programmable
- Power-down mode (SPI selectable)
- 3.1V p-p differential output swing when using a 3.3V supply
- 32-lead, 5mm × 5mm LFCSP package
- Specified from −40°C to +125°C
- Qualified for automotive applications
Applications
- Automotive radar
- Adaptive cruise control
- Collision avoidance
- Blind spot detection
- Self parking
- Electronic bumpers
Block Diagram
Published: 2016-01-29
| Updated: 2022-03-11