THAT Corporation 5171 Digital Preamplifier Controller IC

THAT 5171 Digitally Programmable Gain Controller IC				STATUS Active RoHS Compatible
THAT 5171 Digitally Programmable Gain Controller IC
Key Specifications	Packaging/Pricing/ Samples	Design Notes	Related Products	Additional Resources
Features / Applications / Description

FEATURES
• Ideal mate for THAT1570 preamplifier

• Wide gain range:
+5.6 dB
+13.6 to +68.6 dB in 1 dB steps

• 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

Datasheet Download
5171 Datasheet (364 kB)
High Performance Digital Preamplifier Controller

DESCRIPTION

The THAT5171 is a digital gain controller for low-noise, analog, differential, current-feedback audio preamplifiers such as the THAT1570. 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, supporting 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.

The 5171 is controlled via an addressable serial-peripheral interface (SPI) port. Four General Purpose Outputs (GPOs) can be controlled 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 5171 was designed to mate perfectly with the THAT1570 Differential Audio Preamplifier IC. Together, these two ICs provide a best-of-class solution for digitally-controllable audio preamplifier applications. However, for designers who prefer a more customized solution, the 5171 may also be used to control a discrete preamplifier.

APPLICATIONS

• 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

Key Specifications (see 5171 datasheet for complete specifications)

Parameter	Conditions	5171 Typical	Units
Analog Supply Voltage	Referenced to AGND	4.75 - 17	V
Digital Supply Voltage	—	3.0 - 3.6	V
Analog Supply Current	No signal	8.3	mA
Digital Supply Current	—	2	µA
Max Differential Input Level	—	21	dBu
Max Differential Output Level	—	27	dBu
Gain Range Step Size	13.6 dB £ Gain ³ 68.6 dB	1	dB
Gain Range Error	All gain settings	±0.25	dB

Packaging / Pricing / Samples

Model	Package	Order Number	Pricing (1000)	Min Order Quantity	Reference
5171	32 pin QFN	5171N32-U	$6.70	46	Request Samples
5171	32 pin QFN Tape & Reel	5171N32-UR	Contact us	2000
1570/5171 Demo Board	—	1570/5171DEMO	$250.00	1
All 5171 parts are RoHS compliant. Minimum order quantity (MOQ) is one tube or one reel. Parts must be ordered in multiples of the MOQ. Samples are available to qualified applicants. Pricing is subject to change.

Design Notes (as PDF files)

Design Note 140 Input and Output Circuits for THAT Preamplifier ICs (244k)

Related Products

Matching Audio Preamplifiers
THAT 1570	Low Noise Differential Audio Preamplifier	1570 Datasheet
THAT 1583	Low Noise Differential Audio Preamplifier	1583 Datasheet
Gain Controllers
THAT 5173	Digital Preamplifier Controller	5173 Datasheet
Digitally Controlled Microphone Preampifiers
THAT 1570/5173	Digital Microphone Preamplifier Chip Set
THAT 1570-5171	Digital Microphone Preamplifier Chip Set
THAT 1583/5173	Digital Microphone Preamplifier Chip Set
THAT 1583/5171	Digital Microphone Preamplifier Chip Set
Audio Preampifiers
THAT 1510/1512	Low Noise Single Ended Output Audio Preamplifiers	1510/1512 Datasheet
Balanced Line Receivers
THAT 1200 Series	InGenius® High CMRR Balanced Line Receivers	1200 Series Datasheet
THAT 1240 Series	Single Channel Balanced Line Receivers	1240 Series Datasheet
THAT 1250 Series	Low-Cost Single Channel Balanced Line Receivers	1250 Series Datasheet
THAT 1280 Series	Dual Channel Balanced Line Receivers	1280 Series Datasheet
THAT 1290 Series	Low-Cost Dual Channel Balanced Line Receivers	1290 Series Datasheet
Balanced Line Drivers
THAT 1606/1646	OutSmarts® Balanced Line Driver	1606/1646 Datasheet

Additional Resources

Digitally Controlled Microphone Preamplifier Selector
A side by side comparison of the features and specifications of our digitally controlled microphone preamplifier chip sets.

1570/5171 Digitally-Controlled Mic Preamp Demo Board - The THAT 1570/5171Digitally-Controlled Mic Preamp Demo Board (US$250) allows developers to evaluate the performance of the THAT1570 / THAT5171 chipset. The demo board provides a balanced audio input on a Neutrik "combo" connector with 48V phantom power, and a balanced audio output on XLR and ¼" TRS connectors. The supplied graphical user interface (GUI) controls all functions in the 5171 chip via USB. A prototyping area is available for adding or modifying circuitry. See the 1570/5171DEMO User's Guide for more information.

5171 Surface Mount Adapter Board - For our integrated circuits which are only available in surface mount packages THAT Corporation offers adapter boards which allow one of these surface-mount ICs to interface to a circuit board via traditional thru-hole mounting. These adapters make it easy for a design engineer to evaluate our surface-mount products on a prototype board without having to employ SMT technology. Adapter boards are available to qualified applicants.

5171 Material Data Declaration Sheet
Material Data Declaration Sheets (MDDS) disclose the hazardous materials in our integrated circuits as required by the European RoHS directive.

THAT 5171 Digitally Programmable Gain Controller IC

THAT 5171
Digitally Programmable Gain Controller IC