AU5517D

INTEGRATED CIRCUITS NE5517/NE5517A/AU5517 Dual operational transconductance amplifier Product data Replaces NE5517/NE5517A dated 2001 Aug 03 2002 Dec 06 Philips Semiconductors Philips Semiconductor Product data Dual operational transconductance amplifier NE5517/NE5517A/ AU5517 DESCRIPTION The AU5517 and NE5517 contain two current-controlled transconductance amplifiers, each with a differential input and push-pull output. The AU5517/NE5517 offers significant design and performance advantages over similar devices for all types of programmable gain applications. Circuit performance is enhanced through the use of linearizing diodes at the inputs which enable a 10 dB signal-to-noise improvement referenced to 0.5% THD. The AU5517/NE5517 is suited for a wide variety of industrial and consumer applications. Constant impedance buffers on the chip allow general use of the AU5517/NE5517. These buffers are made of Darlington transistors and a biasing network that virtually eliminate the change of offset voltage due to a burst in the bias current IABC, hence eliminating the audible noise that could otherwise be heard in high quality audio applications. PIN CONFIGURATION N, D Packages IABCa 1 Da 2 +INa 3 16 15 14 13 12 11 10 9 IABCb Db +INb –INb VOb V+ INBUFFERb VOBUFFERb –INa 4 VOa 5 V– 6 INBUFFERa 7 VOBUFFERa 8 Top View SL00306 Figure 1. Pin Configuration FEATURES Constant impedance buffers ∆VBE of buffer is constant with amplifier IBIAS change Excellent matching bet...