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 |
16UQFN-HR: 9 mm2: 3 x 3(UQFN-HR) |
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