5171N32-U THAT Corporation, 5171N32-U Datasheet

Microphone Preamplifiers High-Perform Digital Pre-Amp Controller

5171N32-U

Manufacturer Part Number

5171N32-U

Description

Microphone Preamplifiers High-Perform Digital Pre-Amp Controller

Manufacturer

THAT Corporation

Datasheet

1.5171N32-U.pdf (20 pages)

Specifications of 5171N32-U

Minimum Operating Temperature

- 40 C

Mounting Style

SMD/SMT

Operating Supply Voltage

3 V to 17 V

Operating Temperature Range

- 40 C to + 85 C

Supply Current

8.3 mA

Supply Voltage (max)

17 V

Supply Voltage (min)

3 V

Thd Plus Noise

0.0003 %

Available Set Gain

13.6 dB to 68.6 dB

Input Offset Voltage

+/- 1.5 mV

Maximum Operating Temperature

+ 85 C

Package / Case

QFN-32

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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low-noise, analog, differential, current-feedback

audio preamplifiers such as the THAT 1570.

When used in conjunction with an appropriate

analog gain block, the 5171 can set gain to

5.6dB, or any gain from 13.6dB to 68.6dB in 1dB

steps, while preserving low noise and distortion.

It operates from ±5V to ±17V supplies, support-

ing input signal levels as high as +22 dBu (at

5.6dB gain, and ±17V supplies) in combination

with the 1570 (without an external input pad).

The 5171 includes a differential servo and zero-

crossing detector to minimize dc offsets and

glitches (zipper noise) during gain adjustments.

serial-peripheral interface (SPI) port. Four Gen-

eral Purpose Outputs (GPOs) can be controlled

Ideal mate for THAT1570 preamplifier

Wide gain range:

– +13.6 to +68.6dB in 1dB steps, and

– +5.6dB

Wide supply range: ±5V to ±17V

Wide output swing:+27dBu (±17V sup.)

Wide input swing: +22dBu (±17V sup.)

Low THD+N: 0.0003% @ 22dB gain

Integrated differential servo minimizes

output offset

Zero-crossing detector minimizes

switching noise

Flexible, addressable SPI interface

Four general-purpose digital outputs

Small 7mm x 7mm QFN32 package

The THAT5171 is a digital gain controller for

The 5171 is controlled via an addressable

FEATURES

Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com

THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA

Figure 1. THAT 5171 Block Diagram

Description

via this interface. The GPOs may be connected to

input pads, analog switches, mute circuits, LEDs,

etc. The SPI bus supports read-back so that host

software can verify proper operation.

the THAT 1570 Differential Audio Preamplifier

IC. Together, these two ICs provide a best-of-

class solution for digitally-controllable audio pre-

amplifier applications. However, for designers

who prefer a more customized solution, the 5171

may also be used to control a discrete preampli-

fier.

the 5171 integrates an astonishing amount of cir-

cuitry within a very small package. It comes in a

small (7x7 mm) 32-pin QFN package, making it

suitable for small portable devices.

The 5171 was designed to mate perfectly with

Fabricated in a high-voltage CMOS process,

Digitally controlled microphone

preamplifiers

Digitally-controlled instrumentation

amplifiers

Digitally-controlled differential

amplifiers

Audio mixing consoles

PC audio breakout boxes

Audio distribution systems

Digital audio snakes

Portable audio recorders

APPLICATIONS

Preamplifier Controller IC

High-Performance Digital

THAT 5171

Related parts for 5171N32-U

5171N32-U Summary of contents

Page 1

... Four Gen- eral Purpose Outputs (GPOs) can be controlled 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 © 2010, THAT Corporation Document 600133 Rev 04 APPLICATIONS Digitally controlled microphone preamplifiers ...

Page 2

... SOUT1 32 SOUT2 Thermal PAD 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 © 2010, THAT Corporation; All rights reserved. Page Pin Description No Connect No Connect Attenuator Network Output 1 [Connects to preamplifier feedback 1 (RG1)] ...

Page 3

... Exposure to absolute maximum rating condi- tions for extended periods may affect device reliability dBu = 0.775 Vrms 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 © 2010, THAT Corporation; All rights reserved. ...

Page 4

... OUT SCLK Falling to D Data Valid t OUT CS Inactive to D High Impedance OUT 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 © 2010, THAT Corporation; All rights reserved. Page Conditions 22MΩ, C ...

Page 5

... To achieve other gains, all three resistors are varied by CMOS switches in order to produce 1dB gain steps from +13.6 to +68.5dB. At all gains, 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 © 2010, THAT Corporation; All rights reserved. ...

Page 6

Page 7

Page 8

... OUT 1 U1 THAT 5171 To: Host 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 © 2010, THAT Corporation; All rights reserved. Page Applications 1570) is +26.6dBu. (+63dB), the maximum input signal level is -42dBu, ...

Page 9

... U1 THAT 5171 To: Host MCU Figure 5. 5171/1570 low-cost application for output to an A/D convertor. 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 © 2010, THAT Corporation; All rights reserved. Page ...

Page 10

... To: Host MCU Figure 6. 5171/1570 high-performance application for output to an A/D convertor. 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 © 2010, THAT Corporation; All rights reserved. Page inside the unit, then these capacitors may be omitted or reduced in value ...

Page 11

... Input DOUT 19 Output/Tristate 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 © 2010, THAT Corporation; All rights reserved. Page During reset, the 5171 reads the 3-bit SPI address via the GPO[2:0] pins. These pins are typi- ...

Page 12

... Table SCLK DIN t7 t8 DOUT Figure 7. SPI Timing. 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 © 2010, THAT Corporation; All rights reserved. Page SCLK DIN HiZ DOUT CS SCLK ...

Page 13

... Control/Status Register (R[2:0] = 011) The CONTROL/STATUS register controls the mode of the chip and returns current chip status. 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 © 2010, THAT Corporation; All rights reserved. ...

Page 14

... NPN SETS ADDRESS TO LOGIC 0 Figure 10. Output drivers polarity sets 5171 address during reset. 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 © 2010, THAT Corporation; All rights reserved. Page Driving Relays from GPOs Frequently, the switches which control analog functions will be relays ...

Page 15

... GPO outputs, shown at GPO'0~GPO'3. Besides making the SPI address independent of buffer polarity, the tri-state buffer increases the 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 © 2010, THAT Corporation; All rights reserved. ...

Page 16

... MISO* SCLK GPIO *SPI terminology: Figure 12. Single 5171 connected to a host microcontroller. 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 © 2010, THAT Corporation; All rights reserved. Page Host Microcontroller SPI Port DI Figure 13 ...

Page 17

... THAT1570 THAT5171 Figure 15. Recommended THAT1570/THAT5171 PCB Layout (mounted on same-side of PCB). 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 © 2010, THAT Corporation; All rights reserved. Page PCB Layout Information ...

Page 18

... C' 0 45° C‘ 15.7 mils x 45° THAT5171 High-Performance Digital Preamplifier Controller IC Min Typ Max Units 32 Pin QFN 90 ºC/W JEDEC JESD22-A113-D (250 ºC) 3 Order Number 5171N32-U Table 14. Ordering information VIEW Max 279.53 279.53 37.40 11.81 17.72 1.97 8 ...

Page 19

... January 2010 03 2442 July 2010 04 2476 December 2010 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 © 2010, THAT Corporation; All rights reserved. Page Revision History Date Changes Preliminary release Corrected error in figure six, input inverted ...

Page 20

... Document 600133 Rev 04 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 © 2010, THAT Corporation; All rights reserved. Page THAT5171 High-Performance Digital Preamplifier Controller IC Notes ...

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