31.75 dB Range / 0.25dB Step Digital VGA
0.05 to 8 GHz
The GRF6412 is a SPI-controlled, 31.75 dB range digital variable gain amplifier (DVGA) which provides precise stepping in 0.25 dB increments. The device’s serial interface utilizes three externally defined address bits, allowing up to 8 unique devices to share a common SPI bus. In addition to supporting traditional serial programming, the GRF6412 also includes a special Rapid Fire™ selection pin which allows the device to be immediately switched into a pre-defined attenuation state.
In terms of performance, the GRF6412 can cover the entire 50 MHz to 8 GHz range while still maintaining flat gain as well as precise and monotonic gain stepping. Glitching has been minimized to < 2 dB for all steps. The flexibility of the bi-directional attenuator also allows the device to support DSA+AMP as well as AMP+DSA cascaded configurations.
Product Categories
Applications
- Wireless Infrastructure
- Automotive Cellular and V2X Compensators
- High Performance Gain Trim & AGC Loops
Features
- 31.75dB range with 0.25dB steps via 7-bit Control
- Serial Interface with Support for 8 Addresses
- Programmable Rapid Fire™ Attenuation Setting Which Circumvents Delays Associated with SPI Programming
- Glitchless Stepping (< 2dB Over/Undershoot)
- DSA Supports Bi-directional RF Use
- 3.3 V and 5 V Supply Voltages
- 50 Ω Single-ended Input and Output Impedances
- -40 to 115 °C Operating Temperature Range
- Compact 4 x 4 mm QFN-16 Package
Reference: 5.0V/2.0GHz/DSA+AMP Cascade/Max G
- G: 19.2 dB
- NF: 2.6 dB
- OP1dB: 22.9 dBm
- OIP3: 37 dBm
- INL Attenuation Error: 0.04 dB
- DNL Attenuation Error: 0.05 dB
Reference: 5.0V/2.0GHz/AMP+DSA Cascade/Max G
- G: 19 dB
- NF: 1.8 dB
- OP1dB: 21.7 dBm
- OIP3: 35.7 dBm
- INL Attenuation Error: 0.04 dB
- DNL Attenuation Error: 0.05 dB