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4320 DEMO-A

Description
Amplifier IC Development Tools Low-Voltage Dynamics Processor Demo Board
CategoryEmbedded solution    Engineering tools    Analog and digital IC development tools    Amplifier IC development tools   
File Size335KB,16 Pages
ManufacturerTHAT Corporation
Websitehttp://www.thatcorp.com/
Download Datasheet Parametric View All

4320 DEMO-A Overview

Amplifier IC Development Tools Low-Voltage Dynamics Processor Demo Board

4320 DEMO-A Parametric

Parameter NameAttribute value
MakerTHAT Corporation
Product CategoryAmplifier IC Development Tools
RoHSN
Tools for assessmentTHAT4320
Working power voltage5 V
EncapsulationBulk
Description/FunctionAudio DSPs
series4320
Pre-trimmed Low-voltage Low-power
Analog Engine® Dynamics Processor IC
THAT
4320
FEATURES
• Pre-trimmed VCA & RMS detector
• Wide supply voltage range: 4.5V~16V
• Low supply current: 3.7mA typ. (5V)
• Four opamps
• One low-noise opamp (<5nV/rt-Hz)
• On board PTAT reference
• Wide dynamic range: 120dB as
compander
APPLICATIONS
• Companding noise reduction
• Wireless microphones
• Wireless instrument packs
• Wireless in-ear monitors
• Battery operated dynamics processors
• Compressors
• Limiters
• AGCs
• De-essers
Description
The THAT4320 is a single-chip Analog Engine®
optimized for low-voltage, low-power operation. Incor-
porating a high-performance voltage- controlled ampli-
fier (VCA), RMS-level sensor, and four opamps, the
surface mount part is aimed at battery-operated audio
applications such as wireless microphones, wireless
instruments and in-ear monitors. The 4320 operates
from a single supply voltage down to +4.5Vdc, drawing
only 3.7mA.
This IC also works at supply voltages up to 16Vdc,
making it useful in line-operated products as well. The
VCA is pre-trimmed at wafer stage to deliver low distor-
tion without further adjustment. And, one opamp is
quiet enough to be used as a microphone preamp.
The part was developed specifically for use as a
companding noise reduction system, drawing from
THAT’s long history and experience with dbx®
technology for noise reduction. However, with 22 active
pins, the part is extremely flexible and can be configured
for a wide range of applications including single and
multi-band companders, compressors, limiters, AGCs,
de-essers, etc.
What really sets the 4320 apart is the transparent
sound of its Blackmer® VCA coupled with its accurate
true-RMS level detector. The IC is useful in battery-
powered mixers, compressor/limiters, ENG devices and
other portable audio products. The part is highly
integrated and requires minimal external support
circuitry: it even contains an on-board PTAT (propor-
tional to absolute temperature) voltage
reference to
generate thermally compensated control voltages for
thresholds and gain settings.
27 26
25
23
21
20
18
17
16
OUT
IN
V
EE
VCA
EC-
OA3
V
CC
EC+
28
THAT
4320
RMS
IN
CT
OUT
15
13
V
CC
/2 Buffer
1
14
V
PTAT
V
REF
GND
2
3
4
6
7
8
9
11
Figure 1. THAT4320 equivalent block diagram (QSOP-28 pin assignments shown)
THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA
Tel: +1 508 478 9200; Fax: +1 508 478 0990; Email: info@thatcorp.com; Web: www.thatcorp.com
Copyright © 2009, THAT Corporation; Document 600045 Rev 06
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