The LMH6401 is a wideband, digitally-controlled, variable-gain amplifier (DVGA) designed for dc to radio frequency (RF), intermediate frequency (IF), and high-speed time-domain applications. The device is an ideal analog-to-digital converter (ADC) driver for dc- or ac-coupled applications that require an automatic gain control (AGC).
Noise and distortion performance is optimized to drive ultra-wideband ADCs. The amplifier has an 8-dB noise figure at maximum gain and a –63-dBc harmonic distortion at 1 GHz for full-scale signal levels. The device supports both single- and split-supply operation for driving an ADC. A common-mode reference input pin is provided to align the amplifier output common-mode with the ADC input requirements.
Gain control is performed via an SPI™ interface, allowing a 32-dB gain range from –6 dB to 26 dB in 1-dB steps. A power-down feature is also available through the external PD pin or SPI control.
This level of performance is achieved at a low power level of 345 mW. The operating ambient temperature range is –40°C to 85°C.
| PGA/VGA |
| Number of Channels (#) |
| Vs (Min) (V) |
| Vs (Max) (V) |
| BW @ Acl (MHz) |
| Acl, min spec gain (V/V) |
| Gain (Max) (dB) |
| Slew Rate (Typ) (V/us) |
| Operating Temperature Range (C) |
| Package Group |
| Package Size: mm2:W x L (PKG) |
| LMH6401 |
|---|
| VGA |
| 1 |
| 4 |
| 5.25 |
| 4500 |
| 0.5 |
| 26 |
| 17400 |
| -40 to 85 |
| UQFN-HR | 16 |
| 16UQFN-HR: 9 mm2: 3 x 3 (UQFN-HR | 16) |
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