VCA2611

www.datasheet4u.com VCA 261 6 VCA2616 VCA2611 SBOS234E – MARCH 2002 – REVISED NOVEMBER 2004 Dual, Variable-Gain Amplifier with Low-Noise Preamp FEATURES q LOW-NOISE PREAMP: – Low Input Noise: 0.95nV/√Hz – Active Termination Noise Reduction – Switchable Termination Value – 80MHz Bandwidth – 5dB to 25dB Gain – Differential In and Out q LOW-NOISE VARIABLE GAIN AMPLIFIER: – Low-Noise VCA – Up to 40dB Gain Range – 40MHz Bandwidth – Differential In and Out q LOW CROSSTALK: 66dB at Max Gain, 5MHz q HIGH-SPEED VARIABLE GAIN ADJUST q SWITCHABLE EXTERNAL PROCESSING DESCRIPTION The VCA2616 and VCA2611 are dual, Low-Noise Preamplifiers (LNP), plus low-noise Variable Gain Amplifiers (VGA). The VCA2611 is an upgraded version of the VCA2616. The only difference between the VCA2616 and the VCA2611 is the input structure to the LNP. The VCA2616 is limited to –0.3V negativegoing input spikes; the VCA2611 is limited to –2.0V negativegoing input spikes. This change allows the user to use slower and less expensive input clamping diodes prior to the LNP input. In some designs, input clamping may not be required. The combination of Active Termination (AT) and Maximum Gain Select (MGS) allow for the best noise performance. The VCA2616 and VCA2611 also feature low crosstalk and outstanding distortion performance. The LNP has differential input and output capability and is strappable for gains of 5dB, 17dB, 22dB, or 25dB. Low input impedance is achieved by AT, resulting in as much as a 4.6dB impr...