THAT5263 2-Channel Digitally-Controlled Mic Preamp Demonstration Board THAT 5263-DEMO FEATURES Demonstrates a complete 2 channel digitally-controlled microphone preamplifier system based on THAT5263 IC Controls gain of two microphone preamplifiers Balanced main audio input/output on XLR connectors Balanced TRS line input with -20dB pad Switchable phantom power (with external +48V) Supports pro audio signal levels: +26 dBu (input and output, 15V supplies) Gain adjustable in 3 dB steps from 0 dB to 51 dB Easy to use PC Graphical User Interface software Generous prototyping area DESCRIPTION with phantom power switching and fault protection, The THAT 5263-DEMO Digitally-Controlled Mic Preamp Demo Board allows developers to evaluate mic/line inputs, RFI filtering, and output conditioning. the THAT5263 digital gain controller IC with THAT The board is controlled by a user-friendly PC graph- differential output microphone preamplifiers. A fully- ical user interface over USB. featured microphone preamplifier is demonstrated TP11 THAT1583 U5 Preamp IC U4 Phantom +48V Balanced + Power MIC IN Phantom Output LINE OUT Fault Power Driver Protection CHANNEL 2 TP16 -20 dB U11, U13 U12 LINE IN Pad RA CH2 RG1 CH2 IN1 CH2 IN2 CH2 RG2 CH2 RB CH2 USB To GPO CH1 SCLK Controller Host Module Computer CS GPO CH2 SPI SPI THAT5263 Control Interface DOUT BSY CH1 Logic DIN Daisy BSY CH2 Chain Headers RA CH1 RG1 CH1 IN1 CH1 IN2 CH1 RG2 CH1 RB CH1 U1 -20 dB LINE IN Pad TP1 U3 CHANNEL 1 Phantom +48V + Balanced Power MIC IN Phantom Output LINE OUT Fault Power Driver Protection U2 THAT1580 Preamp IC TP6 U10 R27 (0 Ohm) Power Supply Connections 3.3V SW1 PPGND +48V V+ GND V- +5V Voltage 5V 3.3V Phantom J6 J5 J8 J9 J10 J7 Regulator +48V Power 1 Control PP GND Analog GND 1 Figure 1. THAT5263 Simplified Application Circuit THAT Corporation 45 Sumner Street Milford, MA 01757-1656 USA Tel: +1 508 478 9200 Fax: +1 508 478 0990 Web: www.thatcorp.com Copyright 2016, THAT Corporation All rights reserved. Document 600191 Rev 01 THAT 5263-DEMO Datasheet Page 2 of 16 Document 600191 Rev 01 Overview The THAT5263-DEMO Board demonstrates the The THAT5263 is a digital gain controller for low- 5263 mated with the 1580 and 1583 mic preamplifier noise, analog, differential, current-feedback audio ICs in a typical circuit. An easy to use USB Graphical preamplifiers. When used in conjunction with an User Interface provides total control over all 5263 appropriate analog gain block (e.g. THAT 1580 or 1583), features. Developers can take advantage of the generous the 5263 can digitally control gain from 0dB to 51dB in prototyping area to customize the circuit for their own 3dB steps, while preserving low noise and distortion. It application. operates from 5V to 17V supplies, supporting input signal levels as high as +27 dBu (at 0dB gain, 17 V) without an input pad. THAT Corporation 45 Sumner Street Milford, MA 01757-1656 USA Tel: +1 508 478 9200 Fax: +1 508 478 0990 Web: www.thatcorp.com Copyright 2016, THAT Corporation All rights reserved.