The ADRF6573 is a high performance, digitally controlled, dual variable gain amplifier (VGA) operating from 100 to 4000MHz. Each channel includes a 6-bit digital step attenuator (DSA) with a 31.5 dB gain control range, 0.5 dB steps and ±0.25 dB gain accuracy. The attenuation of the DSA is controlled using a serial peripheral interface (SPI). The SPI is a serial in, parallel out shift register buffered by a transparent latch. It is controlled by three CMOS-compatible signals: data, clock, and latch enable. The amplifier in each channel is a broadband linear amplifier that operates up to 4000 MHz.
The device is internally matched to 50 ohm at the input and output. Only input/output ac coupling capacitors and power supply decoupling capacitors are required for operation.
The ADRF6573 consumes 85 mA per channel and operates from a single supply ranging from 4.75 V to 5.25 V. It is fully specified for operation from -40 to +85°C.
The ADRF6573 is packaged in a 32-terminal, 7 x 7 x 1.0 mm, land grid array (LGA) package.
- Operating frequency range: 100 to 4000MHz
- Dual independent, digitally controlled VGA
- Single serial interface control for both channels
- 6-bit, 0.5dB digital step attenuator
- 30.8dB gain control range with ±0.15dB gain accuracy at 2140MHz
- 17.8dB gain at minimum attenuation at 2140MHz
- P1dB of 19.2dBm at 2140MHz
- OIP3 of 40.0dBm at 2140MHz
- RF input and RF output internally matched to 50 ohm
- Channel to channel isolation of 50dB at 2140MHz
- Single-supply operation from 4.75 to 5.2 V
- The companion ADL5240 integrates a gain block with a DSA
- Applications
- Wireless infrastructure
- Automated test equipment
- RF/IF gain controls
