The ADL5240 is a high performance, digitallycontrolled variable gain amplifier (VGA) operating from 100 MHz to 4000 MHz.The VGA integrates a high performance, 20 dB gain, internally matched amplifier(AMP) with a 6-bit digital step attenuator (DSA) that has a gain control rangeof 31.5 dB in 0.5 dB steps with ±0.25 dB step accuracy. The attenuation of theDSA can be controlled using a serial or parallel interface.
Both thegain block and DSA are internally matched to 50 Ω at their inputs and outputsand are separately biased. The separate bias allows all or part of the ADL5240to be used, which facilitates easy reuse throughout a design. The pinout of theADL5240 also enables either the gain block or DSA to be first, giving the VGAmaximum flexibility in a signal chain.
The ADL5240 consumes just 93 mA and operates from asingle supply ranging from 4.75 V to 5.25 V. The VGA is packaged in a thermallyefficient, 5 mm × 5 mm, 32-lead LFCSP and is fully specified for operation from−40°C to +85°C. A fully populated evaluation board is available.
| Richardson RFPD | |
|---|---|
| Product Category | RF Amplifiers |
| Product Number | ADL5240ACPZ-R7 |
| Product Name | RF & MW VGA |
| Frequency Range | 100 to 4000 MHz |
| Maximum Gain | 19.7 dB |
| Output Power | 19.5 dBm |
