• Versatile two-chip solution:
– 1583 Programmable analog gain block
– 5173 Digital gain controller

• Accommodates full pro audio levels
+26.4 dBu max input with ±17V supplies
• Programmable gain: 0 to 60 dB in 3 dB steps
• Low Noise: -125 dBu EIN, 60 dB gain, Rs=150 Ω
• Low THD+N: < 0.0006% @ 21 dB gain
• Integrated servo minimizes output offset
• Integrated zero crossing detector minimizes switching noise
• Daisy Chainable SPI control interface
• Four general purpose outputs (GPOs)
• Small footprint:
4 x 4 mm QFN16 (1583)
5 x 5 mm QFN24 (5173)

Datasheet Download

Product Datasheets Download

5173 Datasheet (350 kB)
Digital Mic Preamp Controller

1583 Datasheet (190 kB)
Differential Audio Preamplifier

Demo Board Datasheet & Software

5173-DEMO Datasheet
(940 kB PDF file)

5173-DEMO Software
(3 MB ZIP file)


The THAT1583 and THAT5173 ICs enable digitally controlled microphone preamplifier applications with unprecedented performance. Operating on maximum ±17V supplies, the chipset accepts pro audio input levels (+26.4dBu max) without an input pad. Gain is adjustable from 0dB to 60dB in 3dB increments. The 5173’s built-in zero-crossing detector and other patent-pending techniques for reducing zipper noise enable very smooth and silent gain changes. A differential servo reduces output offsets to less than 1.75 mV.

Four general purpose outputs on the 5173 can be connected to a variety of peripheral functions, e.g. input pad, phantom power switches, signal routing switches, LED indicators, etc. Separating the analog mic pre front end (THAT1583) from the digital functions and switched resistor ladder (THAT5173) allows each IC to be optimized for high performance.

Key Specifications (see the 5173 and 1583 datasheets for complete specifications)

Parameter Conditions 1583/5173 Combination Units
Supply Voltage   ± 17 V
Supply Current No Signal 7.0 (1583) 7.6 (5173) 15.3 (Total) mA
Power @ +/- 5V 146 mW
THD + N 21 dB gain 0.0006 %
Equivalent Input Noise, Rs = 150 Ω 0 dB gain 30 dB gain 60 dB gain -100 -118 -125 dBu
Max Differential Input 0 dB gain 30 dB gain 60 dB gain 26.4 -3 -33 dBu
Gain Range   0 – 60 dB
Step Size   3 dB
Max Gain Error   Typ: 0.2 Max: 0.5 dB
Model Package Order Number Pricing (1000) Min Order Quantity Reference
1583 16 pin QFN 1583N16-U $6.64* 92 Request Samples
16 pin QFN Tape & Reel** 1583N16-UR 2000
5173 24 pin QFN 5173N24-U 46
24 pin QFN Tape & Reel** 5173N24-UR 2000
1583/5173 Demo Board 1583/5173DEMO $250.00 1

All 1583 and 5173 parts areRoHS 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.

* Price when 1583 and 5173 are purchased as a pair.  ICs designated -UR are available on tape and reel for a modest increase in price and require an extended lead time. Please contact our sales department for pricing and current lead time.

Design Notes (as PDF files) 

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

More Analog Secrets Your Mother Never Told You (915k) At the 127th AES Convention attendees were invited to attend a THAT exhibitor seminar — “More Analog Secrets Your Mother Never Told You”. A sequel to our popular first “Analog Secrets” seminar, this new presentation exposes more design secrets including “extreme performance” microphone preamps, protecting audio inputs/outputs during phantom power faults, and maintaining high dynamic range in low cost applications.

Related Products
Differential Audio Preamplifiers
THAT 1580 Low Noise Differential Audio Preamplifier 1580 Datasheet
THAT 1583 Low Noise Differential Audio Preamplifier 1583 Datasheet
Gain Controllers  
THAT 5171 Digital Preamplifier Controller 5171 Datasheet
THAT 5173 Low-Cost Digital Preamplifier Controller 5173 Datasheet
THAT 5263 2 Channel Digital Preamplifier Controller 5263 Datasheet
Digitally Controlled Microphone Preamplifiers
THAT 1580/5171 5171 Digital Microphone Preamplifier Chip Set  
THAT 1580/5173 5173 Digital Microphone Preamplifier Chip Set  
THAT 1583/5173 5173 Digital Microphone Preamplifier Chip Set  
THAT 1580/5263 5263 Digital Microphone Preamplifier Chip Set  
THAT 1583/5263 5263 Digital Microphone Preamplifier Chip Set  
THAT 626X 626x Dual Programmable-Gain Preamplifier/ADC Driver 626x Datasheet
Audio Preamplifiers
THAT 1510/1512 Low Noise Single Ended Output Audio Preamplifiers 1510/1512 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. 

1583/5173 Digitally-Controlled Mic Preamp Demo Boards – A THAT Digitally-Controlled Mic Preamp Demo Board (US$250) allows developers to evaluate the performance of the THAT1583 / THAT5173 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 5173 chip via USB. A prototyping area is available for adding or modifying circuitry. See the 5173 DEMO Datasheet for more information. 

1583 and 5173 Surface Mount Adapter Boards – 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. 

1583 Material Data Declaration Sheet
 Material Data Declaration Sheets (MDDS) disclose the hazardous materials in our integrated circuits as required by the European RoHS directive. 

5173 Material Data Declaration Sheet 
Material Data Declaration Sheets (MDDS) disclose the hazardous materials in our integrated circuits as required by the European RoHS directive.