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TS472 데이터시트 PDF




STMicroelectronics에서 제조한 전자 부품 TS472은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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부품번호 TS472 기능
기능 Very low noise microphone preamplifier
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TS472 데이터시트, 핀배열, 회로
www.DataSheet4U.com
TS472
Very low noise microphone preamplifier with
2.0V bias output and active low standby mode
Features
Low noise: 10nV/Hz typ. equivalent input
noise @ F = 1kHz
Fully differential input/output
2.2V to 5.5V single supply operation
Low power consumption @20dB: 1.8mA
Fast start up time @ 0dB: 5ms typ.
Low distortion: 0.1% typ.
40kHz bandwidth regardless of the gain
Active low standby mode function (1μA max)
Low noise 2.0V microphone bias output
Available in flip-chip lead-free package and in
QFN24 4x4mm package
ESD protection (2kV)
Description
The TS472 is a differential-input microphone
preamplifier optimized for high-performance, PDA
and notebook audio systems.
This device features an adjustable gain from 0dB
to 40dB with excellent power-supply and
common-mode rejection ratios. In addition, the
TS472 has a very low-noise microphone bias
generator of 2V.
It also includes a complete shutdown function,
with active low standby mode.
Applications
Video and photo cameras with sound input
Sound acquisition & voice recognition
Video conference systems
Notebook computers and PDAs
Flip-chip - 12 bumps
Pin Connections (top view)
C1 C2
OUTPUT
BIAS
GS
IN+ IN-
STDBY
VCC
OUT+
OUT-
GND BYPASS
QFN24
Pin Connection (top view)
September 2006
Rev 4
1/24
www.st.com
24




TS472 pdf, 반도체, 판매, 대치품
Typical application schematic
2 Typical application schematic
Figure 1 shows a typical application schematic for the TS472.
Figure 1. Application schematic (flip-chip)
www.DataSheTeSt44U7.c2om
Table 2. External component descriptions
Components
Functional description
Cin+, Cin-
Cout+, Cout-
Input coupling capacitors that block the DC voltage at the amplifier input
terminal.
Output coupling capacitors that block the DC voltage coming from the
amplifier output terminal (pins C2 and D2) and determine Lower cut-off
frequency.
Rout+, Rout-
Rpos, Rneg
Cs
Cb
C1, C2
Output load resistors used to charge the output coupling capacitors Cout.
These output resistors can be represented by an input impedance of a
following stage.
Polarizing resistors for biasing of a microphone.
Supply bypass capacitor that provides power supply filtering.
Bypass pin capacitor that provides half-supply filtering.
Low pass filter capacitors allowing to cut the high frequency.
4/24

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TS472 전자부품, 판매, 대치품
TS472
Electricwawl cwh.DaaratacStheereist4tUic.csom
Note:
Table 7.
Gain
(dB)
0
20
40
Differential RMS noise voltage
Input referred noise voltage
(μVRMS)
Unweighted filter A-weighted filter
15 10
3.4 2.3
1.4 0.9
Output noise voltage
(μVRMS)
Unweighted filter A-weighted filter
15 10
34 23
141 91
Table 8.
Bias output RMS noise voltage
Cout Unweighted filter
(μF) (μVRMS)
15
10 2.2
A-weighted filter
(μVRMS)
4.4
1.2
Table 9.
Gain
(dB)
0
20
40
SNR (signal to noise ratio), THD+N < 0.5%
Unweighted filter
(dB)
A-weighted filter
(dB)
VCC=2.2V
75
82
70
VCC=3V
76
83
72
VCC=5.5V
76
83
74
VCC=2.2V
79
89
80
VCC=3V
80
90
82
VCC=5.5V
80
90
84
Unweighted filter = 20Hz F 20kHz
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관련 데이터시트

부품번호상세설명 및 기능제조사
TS472

Very low noise microphone preamplifier

STMicroelectronics
STMicroelectronics

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