Variable gain amplifier provides analog linear-in-dB gain control for IF AGC amplifiers, gain trimming, cellular base stations, point-to-point radio links, and RF instrumentation. The device operates from a 4.5 V to 5.5 V single supply and supports a 50 ohm RF input and output environment with 800 MHz typical 3 dB bandwidth. It provides a 34 dB gain span from -12 dB to +22 dB with 37.5 dB/V gain scaling and an integrated rms detector. The 24-lead LFCSP package is specified for -40°C to +85°C operation and is described as RoHS compliant.
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| Function | Linear-in-dB variable gain amplifier with AGC detector |
| 3 dB Bandwidth | 800 typMHz |
| Gain Span | 34dB |
| Gain Scaling | 37.5 typdB/V |
| Maximum Gain | 22 typdB |
| Minimum Gain | -12 typdB |
| Gain Control Voltage Range | 0 to 1V |
| Gain Step Response | 100 typns |
| AC Input Impedance | 50 typohm |
| AC Output Impedance | 50 typohm |
| Maximum Input | 3 typVp |
| Maximum Output | 2 typVp |
| Noise Figure at 140 MHz | 9.5 typdB |
| Output IP3 at 140 MHz | 33 typdBm |
| Output P1dB at 140 MHz | 16 typdBm |
| Supply Voltage | 4.5 to 5.5V |
| Total Supply Current | 60 typmA |
| Operating Temperature Range | -40 to +85°C |
| RoHS | Compliant |
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