Features

• Versatile two-chip solution:
– 1570 Programmable analog gain block
– 5171 Digital gain controller

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

Datasheet Download

Datasheet Download
5171 Datasheet (362 kB)
High Performance Digital Preamplifier Controller1570 Datasheet (130kB)
Differential Audio Preamplifier

Demo Board Datasheet & Software
1570-5171-DEMO Datasheet
(392 kB PDF file)
1570-5171-DEMO Software
(1.125 MB ZIP file)

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.

Key Specifications(see 5171 datasheet for complete specifications)

ParameterConditions1570/5171 CombinationUnits
Analog Supply VoltageReferenced to AGND5 – 17V
Digital Supply VoltageReferenced to DGND3.0 – 3.6V
Analog Supply CurrentNo Signal15.8mA
Digital Supply CurrentNo Signal2uA
Max Differential Input Level—21dB
Max Differential Output Level—27dB
Equivalent Input Noise, Rs = 150 Ω0 dB gain 30 dB gain 60 dB gain-108 -124 -128dBu
THD + N0 dB gain 30 dB gain 60 dB gain0.0006 0.0005 0.006%
Bandwidth (small signal)0 dB gain 30 dB gain 60 dB gain6 1.7 170MHz MHz kHz
Slew Rate—53V/µs
Dynamic RangePower supply voltage: ±17V 0 dB gain 30 dB gain 60 dB gain127 121 95dB

Gain settings include 5.6 dB output attenuator

Packaging/Pricing/Samples
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
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.

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.

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.