2-Channel Digital Preamplifier Controller IC THAT5263 FEATURES APPLICATIONS Digitally controlled microphone Wide gain range: 0 dB to 51 dB preamplifiers in 3 dB Steps Wide supply range: 5V to 17V Digitally controlled instrumentation amplifiers Wide output swing: + 29.6 dBu (17V) Digitally controlled differential Wide input swing: + 29.6 dBu (17V) amplifiers Low Power: 48mW 15V Supplies Audio Mixing Consoles Low THD+N: 0.003% 24 dB gain Zero-crossing detectors minimize Computer Audio Interfaces switching noise Audio Distribution Systems Daisy chainable SPI interface Digital Audio Snakes Two general-purpose logic outputs Audio Recorders Small 5mm x 5mm QFN24 package DESCRIPTION The THAT 5263 is a 2-channel digital preamplifier no zero crossing occurs within 24 msec of a gain controller intended for use with low-noise, analog, change command. A busy pin (BSY) allows synchro- differential audio preamplifiers such as the THAT nization of external events and the 5263 s own GPOs 1580 and 1583. The 5263 controls gain from 0dB to with the zero-crossing detector. 51 dB in 3dB steps while preserving low noise and The 5263 is controlled via an industry standard distortion. Operating from 5V to 17V analog serial-peripheral interface (SPI) port. The part mates supplies, it supports input signal levels as high as perfectly with the THAT 1580 and 1583 Differential +29.6 dBu (at 0dB gain, 17V supplies, and Audio Preamplifier ICs. Together, these combinations THAT1580) without an input pad. Used with a THAT provide high performance, space-saving solutions for 1580 preamplifier IC, equivalent input noise (EIN) at digitally-controllable audio preamplifiers. However, 51 dB gain is -128.3 dBu (20 Hz - 20 kHz bandwidth, the 5263 may also be used to control discrete pre- 150-ohm source). amplifiers. Fabricated in a high-voltage CMOS process, the Each 5263 channel includes a zero-crossing detec- 5263 comes in a small (5x5 mm) 24-pin QFN pack- tor to minimize glitches (zipper noise) during gain age, making it suitable for small portable devices. adjustments. A built-in timer forces a gain change if +15V -15V +3.3V THAT5263 GPO CH1 BSY CH1 GPO CH2 BSY CH2 V+ V- V DGND DD RG1 CH1 RG1 CH2 Digital Outputs RA CH1 RG CH1 RG CH2 RA CH2 Resistor Array Resistor Array RG CH1 THAT158X THAT158X RA CH1 RA CH2 IN1 CH1 IN1 CH2 Control Zero Zero Logic Crossing Crossing IN2 CH1 IN2 CH2 Detector Detector Gain CH1 Gain CH2 ZCD CH1 ZCD CH2 RB CH1 RB CH2 RG CH2 RB CH1 RB CH2 RG2 CH1 RG2 CH2 SPI Interface DIN DOUT CS CLK Figure 1. THAT5263 Simplified Application Circuit THAT Corporation 45 Sumner Street Milford, Massachusetts 01757-1656 USA Tel: +1 508 478-9200 Fax +1 508 478-0990 Web: www.thatcorp.com Copyright 2015, THAT Corporation Doc 600185 Rev 00 THAT 5263 2-Channel Digitally Page 2 of 16 Document 600185 Rev 00 Programmable Preamplifier Controller Pin Number Pin Name Pin Description 1 RB CH2 Channel 2 Feedback Resistor B 2 IN2 CH2 Channel 2 Feedback Network Input 2 3 V- Negative Analog Supply Voltage 4 V+ Positive Analog Supply Voltage 5 IN1 CH1 Channel 1 Feedback Network Input 1 6 RA CH1 Channel 1 Feedback Resistor A 7 RG1 CH1 Channel 1 Gain Resistor Terminal 1 8 RG2 CH1 Channel 1 Gain Resistor Terminal 2 9 RB CH1 Channel 1 Feedback Resistor B 10 IN2 CH1 Channel 1 Feedback Network Input 2 11 Chip Select (Active Low) CS 12 SCLK Serial Clock Input 13 DIN Serial Data Input 14 DOUT Serial Data Output 15 VDD Logic Supply voltage (+3.3V) 16 DGND Digital Ground 17 BSY CH1 Channel 1 Busy Output 18 BSY CH2 Channel 2 Busy Output 19 GPO CH1 General Purpose Logic Output Channel 1 20 GPO CH2 General Purpose Logic Output Channel 2 21 IN1 CH2 Channel 2 Feedback Network Input 1 22 RA CH2 Channel 2 Feedback Resistor A 23 RG1 CH2 Channel 2 Gain Resistor Terminal 1 24 RG2 CH2 Channel 2 Gain Resistor Terminal 2 Table 1 - Pin Assignments THAT Corporation 45 Sumner Street Milford, Massachusetts 01757-1656 USA Tel: +1 508 478-9200 Fax +1 508 478-0990 Web: www.thatcorp.com Copyright 2015, THAT Corporation All rights reserved.