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THAT 1570/5171
Digitally Controlled Microphone Preamplifier

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fillerRoHS Compatible

 
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IMPORTANT: The 1570/5171 combination is not recommended for new designs.
For your new circuits designs see our latest model 1580/5171 Digitally Controlled Microphone Preamplifier. The 1580 audio preamplifier is pin compatible with 1570 and offers nearly identical specifications.

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Features / Applications / Description
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FEATURES

• Versatile two-chip solution:
 - 1570 Programmable analog gain block
 - 5171 Digital gain controller
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• Accommodates full pro audio levels
  +21 dBu max input @ min gain and ±15V supplies
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• Programmable gain:
  +5.6 dB,  +13.6 ~ 68.6 dB in 1dB steps
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• Low Noise: -128 dBu EIN, 68.8 dB gain, Rs = 150 Ω
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• Low THD+N: 0.0003% @ 21.6 dB gain
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• Integrated servo minimizes dc offset
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• Integrated zero crossing detector minimizes zipper noise
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• Addressable SPI control interface with
   read-back Operates up to 10MHz
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• Four general purpose outputs (GPOs)
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• Small footprint:
   4 x 4 mm QFN16 (1570)
   7 x 7 mm QFN32 (5171)

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Datasheet Download
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5171 Datasheet (362 kB)
High Performance Digital Preamplifier Controller
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1570 Datasheet (130kB)
Differential Audio Preamplifier
Demo Board Datasheet & Software
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1570-5171-DEMO Datasheet
(392 kB PDF file)
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1570-5171-DEMO Software
(1.125 MB ZIP file)
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THAT 1570/5171 Digital Microphone Preamp Circuit

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DESCRIPTION

The THAT1570 and THAT5171 ICs enable digitally controlled microphone preamplifier applications with unprecedented performance. Operating on maximum ±17V supplies, the chipset accepts pro audio input levels (+22dBu max) without an input pad. Gain is adjustable to 5.6dB, and from 13.6dB to 68.6dB in 1dB increments. The 5171’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 1.5 mV.

Four general purpose outputs on the 5171 can be connected to a variety of peripheral functions, e.g. input pad, phantom power switches, signal routing switches, LED indicators, etc. The addressable SPI interface on the 5171 supports read-back, enabling fault-tolerant control software to verify proper operation. Separating the analog mic pre front end (THAT1570) from the digital functions and switched resistor ladder (THAT5171) allows each IC to be optimized for high performance.
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Key Specifications (see 5171 datasheet for complete specifications)
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fillerParameter
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Conditions
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1570/5171
Combination

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Units
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fillerAnalog Supply Voltage
Referenced to AGND 5 - 17 V
fillerDigital Supply Voltage
Referenced to DGND 3.0 - 3.6 V
fillerAnalog Supply Current
No Signal 15.8 mA
fillerDigital Supply Current
No Signal 2 uA
fillerMax Differential Input Level
21 dB
fillerMax Differential Output Level
27 dB
fillerEquivalent Input Noise, Rs = 150 Ω
0 dB gain
30 dB gain

60 dB gain

-108
-124
-128

dBu
fillerTHD + N
0 dB gain
30 dB gain
60 dB gain
0.0006
0.0005
0.006
%
fillerBandwidth (small signal)
0 dB gain
30 dB gain
60 dB gain
6
1.7
170
MHz
MHz
kHz
fillerSlew Rate

53
V/µs
fillerDynamic Range

Power supply voltage: ±17V
0 dB gain
30 dB gain
60 dB gain


127
121
95
dB
Gain settings include 5.6 dB output attenuator
Packaging / Pricing / Samples
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Model Package Order Number Pricing
(1000)
Min Order
Quantity
Reference
1570 16 pin QFN 1570N16-U $10.35* 92 Request
Samples
16 pin QFN
Tape & Reel**
1570N16-UR 2000
5171 32 pin QFN 5171N32-U 52
32 pin QFN
Tape & Reel**
5171N32-UR 2000
1570/5171
Demo Board
1570/5171DEMO $250.00 1

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All 1570 and 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.

* Price when 1570 and 5171 are purchased as a pair. Pricing varies when purchased separately.

**There is a small additional charge for tape and reel packaging.
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Design Notes (as PDF files)
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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.
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Related Products
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  Differential Audio Preamplifiers  
fillerTHAT 1580 Low Noise Differential Audio Preamplifier 1580 Datasheet
fillerTHAT 1583 Low Noise Differential Audio Preamplifier 1583 Datasheet
  Gain Controllers  
fillerTHAT 5171 Digital Preamplifier Controller 5171 Datasheet
fillerTHAT 5173 Low-Cost Digital Preamplifier Controller 5173 Datasheet
fillerTHAT 5263 2 Channel Digital Preamplifier Controller 5263 Datasheet
  Digitally Controlled Microphone Preampifiers  
fillerTHAT 1580/5171 5171 Digital Microphone Preamplifier Chip Set  
     
fillerTHAT 1580/5173 5173 Digital Microphone Preamplifier Chip Set  
fillerTHAT 1583/5173 5173 Digital Microphone Preamplifier Chip Set  
     
fillerTHAT 1580/5263 5263 Digital Microphone Preamplifier Chip Set  
fillerTHAT 1583/5263 5263 Digital Microphone Preamplifier Chip Set  
  Audio Preampifiers  
fillerTHAT 1510/1512 Low Noise Single Ended Output Audio Preamplifiers 1510/1512 Datasheet
     
Additional Resources
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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 1570/5171 Digitally-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 1570/5171 DEMO User's Guide for more information.

1570 Material Data Declaration Sheet
Material Data Declaration Sheets (MDDS) disclose the hazardous materials in our integrated circuits as required by the European RoHS directive.

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.


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