THAT 5173 Digitally-Controlled Mic Preamp Demonstration Board THAT 5173-DEMO FEATURES Demonstrates a complete digitally-controlled microphone preamplifier circuit based on THAT5173 IC Controls gain of the 1580 or 1583 microphone preamplifier. Balanced audio input/output on XLR and TRS connectors Supports pro audio signal levels: +26 dBu (input and output, 15V supplies) Gain adjustable in 3 dB steps from 0 dB to 60 dB Easy to use PC Graphical User Interface software Generous prototyping area Description The THAT 5173-DEMO Digitally-Controlled Mic microphone preamplifier is demonstrated with Preamp Demo Board allows developers to evaluate phantom power switching and fault protection, the THAT5173 digital gain controller IC with any mic/line switching, RFI filtering, and output condi- member of the growing family of THAT differential tioning. The board is controlled by a user-friendly output microphone preamplifiers. A fully-featured PC graphical user interface over USB. CHAS +48V +15V GND -15V +5V Power Supply Inputs +3.3V REG +5V Reset Controller U1 Vcc THAT 5173 + - Servo + Resistor Control - Network Logic Vee with FET USB SPI Bus USB Switches Interface U2 Balanced Mic/Line THAT Output 1580 or Input 1583 Balanced Phantom Output RFI Power RFI Driver Protection Protection Fault Protection OUTPUT SECTION INPUT SECTION Figure 1. Block Diagram of the THAT 5173 Demo Board 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 600169 Rev 04 DOUT DIN SCLK CS DGnd RST GPO3 GPO2 TRC LEDs GPO1 BSY GPO0 SOUT2 SOUT1 Vcc SCAP1 Vdd SCAP2 AGnd Rg2 IN2 Rg1 IN1 VeeDocument 600169 Rev 04 Page 2 of 16 THAT 5173-DEMO Datasheet Overview The THAT5173 is a digital gain controller for 17 V) without an input pad. A differential servo low-noise, analog, differential, current-feedback reduces output offsets to less than 1.75mV. audio preamplifiers. When used in conjunction The THAT5173-DEMO Board demonstrates with an appropriate analog gain block (e.g. the 5173 mated with either the 1580 or 1583 mic THAT1580 or THAT1583), the 5173 can digitally preamplifier IC in a typical circuit. An easy to use control gain from 0dB to 60dB in 3dB steps, while USB Graphical User Interface provides total preserving low noise and distortion. It operates control over all 5173 features. Developers can from 5V to 17V supplies, supporting input take advantage of the generous prototyping area to signal levels as high as +27 dBu (at 0dB gain, customize the circuit for their own application. 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.