|
THAT1570 and THAT5171
1570 Variable-gain audio preamplifier
and 5171 Digitally programmable gain controller
 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 1mV.
Four general purpose outputs on the 5171 can be connected to a variety of
peripheral functions, e.g. mute, 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 microphone preamp front end (THAT1570) from the digital
functions and switched resistor ladder (THAT5171) allows each IC to be optimized
for high performance.
The THAT1570 is fabricated using THAT’s complementary dielectric isolation
process and precision laser-trimmed Si-Chrome thin film resistors, yielding
extremely high performance. The THAT5171 is fabricated using a high-voltage CMOS
process, with proprietary techniques for reducing FET switching glitches.
Packaged in 4x4mm QFN16 and 7x7mm QFN32 packages respectively, the THAT1570 and
THAT5171 require very little PCB area.
THAT 1570/5171
Basic Application Circuit
|
Model |
Package |
Part Number |
Quantity
per Packing Unit |
Reference
|
|
1570 |
16 Pin QFN |
1570N16-U |
92 |
1570
Datasheet
5171
Datasheet
|
|
16 Pin QFN
Tape and Reel* |
1570N16-UR |
2000 |
|
5171 |
32 Pin QFN |
5171N32-U |
52 |
|
32 Pin QFN
Tape and Reel* |
5171N32-UR |
2000 |
*All models are available on
tape and reel for a modest increase in price and require an extended lead time.
Tape and reel parts have a 2000
piece minimum and must be ordered in multiples of 2000.
Please inquire for pricing and
delivery.
The part is fully RoHS compliant.
THAT1570
/ 5171 Features
 | Versatile two-chip solution: |
| 1570 Variable-gain audio preamplifier |
| 5171 Digitally programmable gain controller |
| Accommodates full pro audio levels: |
| +21 dBu max input with ±15V supplies |
| Programmable gain:
+5.6 dB; +13.6 ~ 68.6 dB in 1 dB steps
Low Noise: 1.5 nV/√Hz @ 65.6 dB gain |
| Low THD+N: 0.0003% @ 20.6 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) |
For
pricing and more information:
icsales@cedos.com
To download detailed datasheets in PDF format,
please click on the picture.
THAT1570 / 5171 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 |
| 
