Low-noise Dual IF VGA with FlatNoise™

The IDT F1240 IF VGA featuring FlatNoise™ technology improves system SNR, especially at lower gain settings. By keeping both IP3O & NF flat while gain is backed off, the system SNR is improved significantly under high level interferer conditions, especially when considering alias noise in an IF sampling receiver. The fast-settling, parallel mode gain step of 0.50 dB coupled with the excellent differential non-linearity allow for SNR to be maximized further by targeting the minimum necessary gain in small, accurate increments. The matched output does not require a terminating resistor, thus the gain and distortion performance are preserved when driving Bandpass Anti-Alias filters.

Features

  • Ideal for systems with high SNR requirements
  • 20 dB typical Maximum Gain
  • 31 dB gain control range
  • 6 bit control
  • 0.50 dB Gain Steps
  • Excellent Noise Figure ~ 4.0 dB
  • 5mm x 5mm 32 pin package
  • 200 ohm Differential Matched Input
  • 200 ohm Differential Matched Output
  • No termination resistor required
  • NF degrades < 2dB @ 10 dB reduced gain
  • 10 MHz – 500 MHz frequency range
  • Ultra-Linear: IP3O +47 dBm typical
  • Excellent 2nd Harmonic Rejection
  • Parallel / Serial Control
  • External current setting resistors
  • Very fast settling < 15 nsec
  • Individual Power Down Modes
  • Extremely low power consumption:  79 mA / Ch

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
F1240NBGI Active NBG32P2 VFQFPN 32 I Yes Tray Availability
F1240NBGI8 Active NBG32P2 VFQFPN 32 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
F1240NBGI Datasheet Datasheet PDF 1.53 MB Mar 30, 2012
Application Notes & White Papers
AN-896 RF Products EVS Digital Control Software Guide Application Note PDF 2.91 MB Aug 30, 2015
PCNs & PDNs
PCN# : TB1602-01 Alternate Test Location for Select Devices Product Change Notice PDF 39 KB Mar 14, 2016
PCN# : A1406-01R1 Add Alternate Assembly Product Change Notice PDF 35 KB Oct 13, 2015
PCN# : A1406-01 Alternate Assembly Locations for Selective Package Product Change Notice PDF 33 KB Apr 5, 2015
PCN# : Q1403-01 Datasheet change F1240NBGI Product Change Notice PDF 950 KB Apr 8, 2014
Other
F1240 S-Parameters Model - S-Parameter ZIP 1.46 MB Oct 5, 2017

Software & Tools

Title Other Languages Type Format File Size Date
RF Digital Control Software Installer Software Tool ZIP 169.81 MB Aug 30, 2015

Evaluation Boards

Part Number Title Sort ascending
F1240EVBI Evaluation Board for F1240 Dual Intermediate Frequency Digital Variable Gain Amplifier