STEVAL-CCA023V1 Demonstration board for low noise microphone preamplifier Features

STEVAL-CCA023V1 Demonstration board for low noise microphone preamplifier Features
STEVAL-CCA023V1
Demonstration board for low noise microphone preamplifier
with 2 V bias based on the TS472
Data brief
Features
■
Low noise: 10 nV / √ Hz typ. equivalent input
noise @ F=1 kHz
■
Fully differential input/output
■
2.2 V to 5.5 V single supply operation
■
Low power consumption @20 dB: 1.8 mA
■
Fast start up time @ 0dB: 5 ms typ.
■
Low distortion: 0.1% typ.
■
40 kHz bandwidth @ -3 dB and adjustable gain
■
Active low standby mode function (1µA max)
■
Low noise 2.0 V microphone bias output
■
Available in flip-chip ECOPACK® package and
QFN24 4x4 mm
■
ESD protection (2 kV)
■
RoHS compliant
STEVAL-CCA023V1
Description
The STEVAL-CCA023V1 demonstration board is
designed as an evaluation platform for the TS472
low noise microphone preamplifier with 2.0 V bias
and active low standby mode.
The board supports customization of the testing
conditions, allowing the gain of the TS472 device
to be adjusted, or an electret microphone to be
biased either externally or using the TS472 builtin 2.0 V bias voltage.
August 2009
Doc ID 16138 Rev 1
For further information contact your local STMicroelectronics sales office.
1/4
www.st.com
4
4
3
2
1
INPUT
P1
1
C10
1uF
2
1
C11
POS. INPUT
NEG. INPUT
2
R11
R7
R6
R10
1
1
2
Bias
2
100nF
C5
100nF
C4
2
1
P11 Vbias
Vcc
P5
1
2
1
C6
100nF
Jumper J1
BIAS
IN-
8
Bias 4
IN+
6
2
1
2
Vx
1
2
C7
1uF
VCC
Vcc
14
P10
1
2
3
StandBy
P6
3
VCC
C1
1
Bias
Gain
C2
2
1
1
2
1
2
1
2
GND
9
STDBY
15
Doc ID 16138 Rev 1
2
2
100pF
C2
100pF
C1
5
10
BYPASS
12
OUTGAIN
SELECT
13
OUT+
TS472_Adapter
1
1
1
2
2/4
470k
27k
4k7
1k
68R
C3
1uF
Bias
Min
Max
Rgs
1
1
2
2
R8
100k
R9
100k
7
5
3
1
2
4
6
8
10
Jumper J3
Rgs
1
3
5
7
9
P9
Gain Select
8
6
4
2
P8
Jumper J2
100nF
C8
100nF
C9
1
2
Bias
68
1 R5
1k
1 R4
4.7k
1 R3
27k
1 R2
470k
1 R1
POS. OUTPUT
NEG. OUTPUT
2
2
2
2
2
OUTPUT
4
3
2
1
P2
Figure 1.
1
1
2
Jumper J4
Schematic circuit
STEVAL-CCA023V1
Schematic circuit
Demonstration board schematic diagram
STEVAL-CCA023V1
2
Revision history
Revision history
Table 1.
Document revision history
Date
Revision
14-Aug-2009
1
Changes
Initial release.
Doc ID 16138 Rev 1
3/4
STEVAL-CCA023V1
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