{"product_id":"current-to-voltage-converter-circuit-for-audio-dacs","title":"Current-to-Voltage Converter Circuit for Audio DACs","description":"\u003cp\u003e\u003cspan\u003eMany high-performance audio digital-to-analog converters (DACs) feature a current output that must be converted into a voltage output for use with audio amplifiers. In premium automotive audio applications, for example, it is critical that the DAC signal-to-noise ratio (SNR) and total harmonic distortion plus noise (THD+N) performance is not compromised by the current-to-voltage (I-V) output stage. The first stage of the circuit converts the current output to a voltage output by providing a virtual ground potential to the OUTP and OUTN nodes of the DAC. The current flowing from the DAC then creates a voltage across the resistor, R4, R18, in the feedback loop. Note that current-output audio DACs have a common mode current that creates an offset to confirm that the DAC is always sourcing current. This common-mode current also results in the output of the first stage always being a negative value. The supplies of the amplifiers of the circuit are not required to be symmetrical. The second stage of the circuit is a differential amplifier that converts the differential voltage of the first stage into a single-ended output voltage. In the third-order, low-pass filter (LPF) circuit, the output level of 2.1 V RMS and 123-dB signal-to noise ratio is achieved. A \u003c\/span\u003e\u003cstrong\u003eNE5534\u003c\/strong\u003e\u003cspan\u003e operational amplifier is used for the I\/V circuit to obtain the specified performance. Dynamic performance such as the gain bandwidth, settling time, and slew rate of the operational amplifier affects the audio dynamic performance of the I\/V section. The current of the PCM1795 device on each of the output pins (IOUTL+, IOUTL–, IOUTR+, IOUTR–) is 4 mA-PP at 0 dB (full-scale).\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePower Input +\/-15V DC (Dual 15V DC)\u003c\/li\u003e\n\u003cli\u003eOn Board Power LED\u003c\/li\u003e\n\u003cli\u003eStereo Output Signal 2.1V RMS\u003c\/li\u003e\n\u003cli\u003eHeader Connector for Input Signals\u003c\/li\u003e\n\u003cli\u003eScrew Terminals for Audio Output\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 46.99 x 33.66 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eConnections\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCN1 Signal Inputs: Pin 1 = L-Channel -In, Pin 2 = L-Channel +In, Pin 3 = R-Channel -In, Pin 4 = R-Channel +In, Pin 5 = GND\u003c\/li\u003e\n\u003cli\u003eCN2 Power Input: Pin 1 = +VCC, Pin 2 = GND, Pin 3 = -VEE\u003c\/li\u003e\n\u003cli\u003eCN3 Signal Output: Pin 1 = Left Channel Output, Pin 2 = GND\u003c\/li\u003e\n\u003cli\u003eCN4 Signal Output: Pin 1 = Right Channel Output, Pin 2 = GND\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47193000738988,"sku":"A126","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/s126A.jpg?v=1789211413","url":"https:\/\/dotfry.com\/products\/current-to-voltage-converter-circuit-for-audio-dacs","provider":"dotfry","version":"1.0","type":"link"}