High Performance Dual DVGA

High Performance Dual DVGA - LMH6521


The LMH6521 contains two high performance, digitally controlled variable gain amplifiers (DVGA).

Both channels of the LMH6521 have an independent, digitally controlled attenuator followed by a high linearity, differential output amplifier. Each block has been optimized for low distortion and maximum system design flexibility. Each channel has a high speed power down mode.

The internal digitally controlled attenuator provides precise 0.5-dB gain steps over a 31.5-dB range. Serial and parallel programming options are provided. Serial mode programming uses the SPI interface. A pulse mode is also offered where simple up or down commands can change the gain one step at a time.

The output amplifier has a differential output allowing 10-VPPD signal swings on a single 5-V supply. The low impedance output provides maximum flexibility when driving filters or analog to digital converters.


  • OIP3 of 48.5 dBm at 200 MHz
  • Maximum Voltage Gain of 26 dB
  • Gain Range: 31.5 dB with 0.5-dB Step Size
  • Channel Gain Matching of ±0.04 dB
  • Noise Figure: 7.3 dB at Maximum Gain
  • –3-dB Bandwidth of 1200 MHz
  • Low Power Dissipation
  • Independent Channel Power Down
  • Three Gain Control Modes:
    • Parallel Interface
    • Serial Interface (SPI)
    • Pulse Mode Interface
  • Temperature Range: –40°C to +85°C
  • Thermally-Enhanced, 32-Pin WQFN Package

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Parametrics Compare all products in Programmable & Variable Gain Amplifiers (PGA/VGA)

Number of Channels (#)
Vs (Min) (V)
Vs (Max) (V)
BW @ Acl (MHz)
Acl, min spec gain (V/V)
Gain (Max) (dB)
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
LMH6521 LMH6522 LMH6523
VGA    VGA    VGA   
2    4    4   
4.75    4.75    4.75   
5.25    5.25    5.25   
1400    1400    1400   
0.53    0.61    0.5   
26    26    26   
-40 to 85    -40 to 85    -40 to 85   
32WQFN: 25 mm2: 5 x 5(WQFN)    54WQFN: 55 mm2: 5.5 x 10(WQFN)    54WQFN: 55 mm2: 5.5 x 10(WQFN)