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Variable Gain Amplifiers (VGA)

IDT offers digitally-controlled intermediate frequency (IF)  and radio frequency (RF) variable gain amplifiers (VGA) with FlatNoise™ technology, an innovative technology where noise does not degrade as gain is reduced. IDT's low-noise devices improve quality-of-service (QoS) and ease the signal-to-noise ratio (SNR) requirements of the downstream data converter to reduce system cost.

Some of IDT's digital voltage gain amplifiers feature patented Glitch-Free technology, eliminating attenuation setting overshoot (glitches) from the transmit and or receive paths by reducing transient “glitches” by up to 95 percent during most significant bit (MSB) transitions. IDT's IF VGAs and RF VGAs are ideal for receiver and transmitter systems located in cellular base stations and other wireless infrastructure equipment.  

About Variable Gain Amplifiers (RF VGA or DVGA)

You can think of a variable gain amplifier for RF systems (RF VGA) as simply combining an amplifier (gain device) and an attenuator in the same package. A device that utilizes digtial control is called a digital variable gain amplifier (DVGA). This function is used in either the transmitter or receiver to add an adjustable gain element to the signal chain (either a little gain, or a lot of gain) by increasing or decreasing the attenuation value.


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FunctionInput Freq (MHz)Output Freq Range (MHz)Supply Voltage (V)Pkg. TypeLead Count (#)Output IP3 (dBm)Gain (dB)Gain Resolution (dB)Noise Figure dB (dB)
F0480  DatasheetF0480 Block DiagramF0480
Matched Broadband RF VGA wit...
RF VGA400 - 2700400 - 27004.75 - 5.25VFQFPN32412314
IDTF1200NBGI Datasheet RevOF1200 - Block DiagramF1200
Low-noise Digital IF VGA wit...
IF VGA30 - 15030 - 1504.75 - 5.25VFQFPN2848220.252.2
F1240NBGI DatasheetF1240 - Block DiagramF1240
Low-noise Dual IF VGA with F...
Dual IF VGA10 - 50010 - 5004.75 - 5.25VFQFPN3247200.54
F1241 DatasheetF1241 - Block DiagramF1241
Low-noise Dual IF VGA with F...
Dual IF VGA10 - 50010 - 5004.75 - 5.25VFQFPN32472014
RF Products Family OverviewF1455 Block DiagramF1455
TX RF VGA with KLIN™ Featu...
RF VGA1400 - 23001400 - 23005VFQFPN2839320.54