that4315s THAT Corporation, that4315s Datasheet

no-image

that4315s

Manufacturer Part Number
that4315s
Description
Low-power Analog Engine Ic
Manufacturer
THAT Corporation
Datasheet
T H A T
gine
ation. Incorporating a high-performance voltage-
controlled amplifier (VCA) and RMS-level sensor,
the surface mount part is aimed at bat-
tery-operated audio applications such as wire-
less microphones, wireless instruments and
in-ear monitors. The 4315 operates from a single
supply voltage down to +4.5Vdc, drawing only
1.6mA.
16Vdc, making it useful in line-operated prod-
ucts as well. The VCA is pre-trimmed at wafer
stage to deliver low distortion without further ad-
justment.
Pre-trimmed VCA & RMS detector
Wide supply voltage range: 4.5V~16V
Low supply current: 1.6 mA typ. (5V)
Wide dynamic range: 118 dB as
compander
The THAT4315S is a single-chip Analog En-
This IC also works at supply voltages up to
®
optimized for low-voltage, low-power oper-
FEATURES
THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA
C o r p o r a t i o n
Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com
NC
NC
16
4315S
1
THAT
RMS
VCA
15
IN
IN
2
Figure 1. THAT4315 equivalent block diagram
IN
IN
VCA
RMS
NC
NC
14
CT
3
Document 600065 Rev 03
EC+
Description
EC-
OUT
OUT
OUT
VCA
13
CT
4
RMS
OUT
EC-
12
5
a companding noise reduction system, drawing
from THAT’s long history and experience with
dbx
with 11 active pins, the part is extremely flexible
and can be configured for a wide range of appli-
cations
companders,
de-essers, etc.
parent sound of its Blackmer™ VCA coupled
with its accurate true-RMS level detector. The IC
is useful in battery-powered mixers, compres-
sor/limiters, ENG devices and other portable au-
dio products.
The part was developed specifically for use as
What really sets the 4315 apart is the trans-
®
VREF
Companding noise reduction
Battery operated dynamics processors
EC+
technology for noise reduction. However,
11
6
including
Wireless microphones
Wireless instrument packs
Wireless in-ear monitors
Compressors
Limiters
AGCs
De-essers
Low-power Analog Engine
FILT
APPLICATIONS
10
NC
7
compressors,
Ra
Rb
Pre-trimmed Low-voltage
GND
VCC
8
single
9
THAT 4315S
and
limiters,
multi-band
AGCs,
®
IC

Related parts for that4315s

that4315s Summary of contents

Page 1

... Pre-trimmed VCA & RMS detector Wide supply voltage range: 4.5V~16V Low supply current: 1.6 mA typ. (5V) Wide dynamic range: 118 dB as compander The THAT4315S is a single-chip Analog En- gine ® optimized for low-voltage, low-power oper- ation. Incorporating a high-performance voltage- controlled amplifier (VCA) and RMS-level sensor, ...

Page 2

... A RMS 200 nA RMS 200 uA RMS IN -20 dB < VCA gain < + a< i < 100 A IN(RMS) ±7 THAT4315S Pre-trimmed Low-voltage Low-power Analog Engine® =85 ºC 400mW D A Supply Voltage ) -40 to +125 ºC ST 300 ºC 2 Min Typ ...

Page 3

... For details of the theory of operation of the VCA and RMS Detector building blocks, the interested THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Conditions º ...

Page 4

... Note that result of the mathematics of RMS detection, the at- tack and release time constants are fixed in their re- lationship to each other. THAT4315S Pre-trimmed Low-voltage Low-power Analog Engine® resistor, R24 in Figure 2, is REF A. The resulting time con- ...

Page 5

... A. However the 2252, the level match will be affected by any addi- tional currents drawn from the C pin. T THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com V /2 Reference Buffer CC ...

Page 6

... Out Out Out Out ( 1 For the decoder shown in Figure 3, we can state that Out + + L.M. Figure 3. Feedforward expander. THAT4315S Pre-trimmed Low-voltage Low-power Analog Engine® IC (level-independent) systems, A Out ) ( . . ) Out Out k ...

Page 7

... Figure 4. 4315 Typical Application Circuit - 2:1 Compressor THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com set for a release rate of -125 dB per second by using a value of 10 uF. As described in the Theory of Operation section “ ...

Page 8

... Figure 5. 4315 Typical Application Circuit - 1:2 Expander The decoder Figure 5 shows the THAT4315S configured as a 2:1 expander, an arrangement intended to comple- ment the encoder in Figure 4. This circuit is opti- mized for low-voltage operation, as might be the case for a decoder in an in-ear monitoring system which will run from battery power. ...

Page 9

... C18 22n Decode In U4B 5 C12 Op-Amp THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com 9 6 U1C Vref Vcc THAT C9 4315 100n Gnd ...

Page 10

... VCA Out Vref EC- 12 U3D 12 14 Op-Amp U3C Op-Amp Vcc R5 2k0 C4 R6 10u 2k0 Vref Vref Figure 8. 3:1 Encoder circuit THAT4315S Pre-trimmed Low-voltage Low-power Analog Engine® 22p R3 200k U3B Op-Amp C11 R8 R4 80k6 ...

Page 11

... Table 3. 3:1 compander transfer characteristics THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com U6A R10 Op-Amp 3 80k6 2 1 C18 5 1n Vref R11 R12 ...

Page 12

... Package Information The THAT 4315S is available in a 16-pin QSOP package as shown in Figure 10. THAT4315S Pre-trimmed Low-voltage Low-power Analog Engine® ...

Related keywords