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THAT4305 fiches techniques PDF

THAT Corporation - Analog Engine

Numéro de référence THAT4305
Description Analog Engine
Fabricant THAT Corporation 
Logo THAT Corporation 





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THAT4305 fiche technique
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T H AT Corporation
FEATURES
· Pre-trimmed Blackmer™ VCA &
RMS-level detector
· Wide supply voltage range:
±4.5V ~±16V
· Low supply current:
3.5 mA typ. (±15V)
· Wide dynamic range:
117 dB (VCA)
60 dB (RMS-level detector)
Pre-trimmed Analog Engine® IC
THAT 4305
APPLICATIONS
· Compressors & Limiters
· Gates & Expanders
· AGCs
· Line-operated dynamics processors
· De-Essers
· Duckers
· Mixers
· Level indicators
· Companding noise reduction systems
Description
The THAT4305 is a single-chip Analog En-
The 4305 was developed specifically for use
gine optimized for low-cost applications. It incor-
in low-cost dynamics processors, drawing from
porates a high-performance Blackmer voltage-
THAT's long history and experience with such
controlled amplifier (VCA) and log-responding
designs. Both VCA control ports and the detec-
RMS-level sensor. The VCA and RMS detector
tor input and output are available for the de-
are pre-trimmed at wafer stage to deliver low dis-
signer to connect as s/he sees fit. As a result, the
tortion without further adjustment.
part is extremely flexible and can be configured
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iters, gates, and other dynamic processors. The
cators, etc.
part normally operates from a split supply volt-
What really sets the 4305 apart from other
age up to ±16Vdc, drawing only 3.5mA at ±15V.
manufacturers’ offerings is the transparent sound
This IC also works at supply voltages as low as
of its Blackmer VCA, coupled with its accurate
±4.5V, making it useful in some battery-operated
true-RMS level detector. This makes the IC useful
products as well.
in a wide range of analog audio products.
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VCA
VCA
NC IN NC OUT EC- EC+ NC VCC
16 15 14 13 12 11 10 9
VCA
IN OUT
EC+ EC-
RMS
IN OUT
CT
123
NC RMS NC
IN
45678
CT RMS GND NC VEE
OUT
Figure 1. THAT4305 equivalent block diagram
Pin Name
No Connection
RMS IN
No Connection
CTIME
RMS OUT
GND
NC
Vee
VCC
No Connection
EC+
EC-
VCA OUT
No Connection
VCA IN
No Connection
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Table 1. THAT 4305 pin assignments
Package
16 pin QSOP
Order Number
4305Q16-U
Table 2. Ordering Information
THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA
Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com
Document 600067 Rev 00
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