MEMS SPEAKERS
ADAP UT-P2023 | DATASHEET
Adap UT-P2023 MEMS speakers are ideal for
free-field audio solutions such as wearables. Due to
its small size and low weight, Adap UT-P2023
offers maximum flexibility for outstanding design
approaches. Providing a wide bandwidth, it enables
high-res audio applications. Adap UT-P2023
produces a tangible, clear, and rich sound that
immerses the listener into their personal audio
environment.
FEATURES
APPLICATIONS
Enables modern, lightweight and ergonomic
designs for sophisticated wearables
Adap UT-P2023 speakers can be used for free-field
audio systems as well as wearables. For 2-way
earphones Adap UT-P2023 speakers are suitable
as tweeters.
Seamlessly integrates into acoustic devices
for everyday use
Extends battery life due to the speaker’s low
power consumption
Enhanced cover for handling protection
Competitive sound pressure level
No magnetic field
Low heat generation
Adap UT-P2023 | Datasheet
Released in February 2021, updated in May 2021
USound GmbH | www.usound.com | sales@usound.com
CONTENT
SPECIFICATIONS 3
MECHANICAL DIMENSIONS 4
FORCE ON SPEAKER 5
TEST CONDITIONS 6
REFERENCE DRIVING CIRCUIT 7
ACOUSTIC PERFORMANCE 8
HANDLING 11
INTEGRATION 12
SPEAKER GASKETS 13
CONNECTIVITY 14
LABELLING 14
PACKAGING 15
REVISION HISTORY
February 2021: Release
May 2021: Capacity value changed, page 3; speaker gasket information added, page 13
2
Adap UT-P2023 | Datasheet
Released in February 2021, updated in May 2021
USound GmbH | www.usound.com | sales@usound.com
SPECIFICATIONS
General acoustics
fres @ 15 VP
[kHz]
2.9
[-]
0.7
Effective membrane surface – SD
[mm²]
12
Equivalent volume – VAS
[mm³]
40
Front volume inside speaker
[mm³]
5.6
Back volume inside speaker
[mm³]
20
SPL @ 1 kHz / 15 VP
[dB]
53
±3.0
SPL @ 4 kHz / 15 VP
[dB]
71
±3.0
SPL @ 10 kHz / 15 VP
[dB]
76
±3.0
SPL @ 1 kHz / 5 VP
[dB]
43
±3.0
SPL @ 4 kHz / 5 VP
[dB]
60
±3.0
SPL @ 10 kHz / 5 VP
[dB]
65
±3.0
THD @ 1 kHz / 5 VP
[%]
16
+8
THD @ 4 kHz / 5 VP
[%]
5
+3
THD @ 10 kHz / 5 VP
[%]
4
+3
[nF]
26
±5
Q @ fres / 15 VP
±15%
Acoustics in baffle (IEC 60268-5)
Electronics
Capacity
Operating conditions
Maximum AC voltage (peak) – up to 40 kHz
[VP]
15
Maximum DC voltage
[V]
15
[mAP]
200
[mW]
46
Maximum AC current (peak)
Power consumption*
With IEC noise (60268-1) incl. high pass @ 2 kHz @ 60 dB
*Power consumption measured with the reference driving circuit, shown on page 7; Supply voltage: 3.6 V.
3
Adap UT-P2023 | Datasheet
Released in February 2021, updated in May 2021
USound GmbH | www.usound.com | sales@usound.com
MECHANICAL DIMENSIONS
Cover
Membrane
and plate
Positive
pole contact
Negative
pole contact
Ring
Orientation mark
negative pole
Back port
Protection sheet
Figure 1: Mechanical drawings: perspective view
0.90 ±0.02
1.30 ±0.15
0
0.1
0±
t
por
k
c
Ba
.02
1 ±0
5.50 ±0.02
0.18 ±0.06
Bottom to
contact
2.78 ±0.04
4.70 ±0.10
1.60 ±0.03
1.58 ±0.15
0.80 ±0.05
3.60 ±0.03
DMC format: 8x18.
Pixel size 0.2mm
3.50 ±0.02
0.8
1.12 ±0.05
1.40 ±0.05
6.70 ±0.10
Figure 2: Mechanical drawings: top/down/side view
Mechanics
Size
[mm]
6.7 x 4.7 x 1.58
Total speaker weight
[mg]
80
[mm³]
50
Total speaker cubic volume
4
Adap UT-P2023 | Datasheet
Released in February 2021, updated in May 2021
USound GmbH | www.usound.com | sales@usound.com
FORCE ON SPEAKER
Type of stress
Maximum handling force [N]
Maximum permanent force [N]
Front face compression
20
13
Side face compression
20
13
3 point bending
10
5
Force on membrane
0
0
Figure 3: Left: front face compression, centre: side face compression, right: 3-point bending
5
Adap UT-P2023 | Datasheet
Released in February 2021, updated in May 2021
USound GmbH | www.usound.com | sales@usound.com
TEST CONDITIONS
ACOUSTICS
General
Measurement system
Audio Precision APx
Measurement signal
Exp. Sweep
Voltage levels – audio VDC + VAC
15 V + 15 VP
Applied back volume
Open (infinite)
Baffle
Baffle type
IEC 60268-5
Mic distance
3 cm
Reference distance
10 cm
Microphone
GRAS 46AC
Microphone diameter
1/2”
BAFFLE MEASUREMENT ADAPTER
DETAIL A
MEMS Speaker
4xPogo-pins
3
0.3
Sealing Gasket
IEC Baffle
A
Sealing O-Ring
Figure 4: The outlet through the baffle for the speaker has the same
shape as the inside of the speaker cover
6
Adap UT-P2023 | Datasheet
Released in February 2021, updated in May 2021
USound GmbH | www.usound.com | sales@usound.com
REFERENCE DRIVING CIRCUIT
In Figure 5 and Figure 6 the reference driving circuit is shown. It includes the amplifier TI LM48580 and the
DC boost converter TPS61046.
1
The boost converter is configured to provide a constant 15 VDC offset for the speaker. The amplifier circuit
itself is based on the typical application diagram from the LM48580 datasheet. It is based on a single-ended
input signal but can also be modified according to the datasheet to a differential input.
2
3
L1
2
3
10uH
+1.8V to +5.5V
A1
U1
VIN
A2
C1
1uF
10V
B2
SW
C1 L1
EN
FB
10uH
TPS61046
VB_ENABLE
GND
+1.8V to +5.5V
A1
U1
VIN
A2
C1
1uF
10V
EN
B1
R2
30k
GND
+15V
C2
B1
FB
C2
2.2uF
25V
R1
536k
GND
TPS61046
VB_ENABLE
GND
C2
2.2uF
25V
R1
536k
B2
SW
GND VOUT
C1
+15V
C2
GND VOUT
R2
GND
D1
+2.5Vboost
to +5.5V converter including required
Figure 5: TPS61046
passive components
30k
L2
C3
10uF
10V
4.7uH
C4
1uF
10V
U2
C3
+2.5V
GND to +5.5V
GND
AMP_ENABLE
GAIN
C3
10uF
10V
C4
1uF
10V
C6
B2
U2
AUDIO_IN
GND
C2
C3
1uF
GND6.3V
AMP_ENABLE
C2
C9
1uF B2
6.3V
GAIN
C6
GND
AUDIO_IN
1uF
6.3V
A3
B3
GND
VDD
SW
L2
SHDN_N
4.7uH
GAIN
A3
IN+
VDD
B3
INSHDN_N
GAIN
LM48580
IN+
IN-
VBST
VAMP
OUT+D2
SW
D2
D1
GND
D1
C1
C7
A1
B1
OUTD1 A2
VBST
SGNDC1
D3
VAMP
PGND
OUT+
OUTSGND
PGND
C9
1uF
6.3V
C5
1uF
25V
A1
+15V
C5
1uF
25V
25V
10uF
R3
100K
MEMS positive pole
GND
C8
10uF +15V
25V
GND
B1
C7
C8
A2
D3
25V
10uF
MEMS negative pole
R4
100K
R3
100K
GNDMEMS positive pole
MEMS negative pole
10uF
25V
R4
100K
LM48580
GND
GND
GND
Figure 6: LM48580 amplifier, including required passiveTitle
components
LM48580 and TPS61046
Size A4 Document Name Ganymede_Amp.SchDoc
Date 14.01.2021
1
2
Rev 1.0.0
Sheet
1
of
1
3
Title LM48580 and TPS61046
Size A4 Document Name Ganymede_Amp.SchDoc
7
2
Adap UT-P2023 | Date
Datasheet
Sheet
of
14.01.2021 Rev 1.0.0
1
Released in February 2021,
3 updated in May 2021
USound GmbH | www.usound.com | sales@usound.com
1
ACOUSTIC PERFORMANCE
ACOUSTIC PERFORMANCE IN BAFFLE (IEC 60268-5)
90
SPL10cm [dB]
80
70
60
50
40
1000
2000
3000
4000
5000
6000 7000 8000
Frequency [Hz]
10000
20000
30000
40000
20000
30000
40000
Figure 7: SPL @ 15 VP drive*
50
40
THD [%]
30
20
10
0
1000
2000
3000
4000
5000
6000 7000 8000
Frequency [Hz]
10000
Figure 8: THD 60 dB SPL @ 4 kHz, corresponds to 5 VP
*Red lines in figure 7 indicate the limits. Test limits are used to establish incoming inspection acceptance/
rejection criteria, correlation of test equipment with USound is also a requirement for elimination of
equipment and test method variation.
8
Adap UT-P2023 | Datasheet
Released in February 2021, updated in May 2021
USound GmbH | www.usound.com | sales@usound.com
GROUP DELAY
1
Group Delay [ms]
0,8
0,6
0,4
0,2
0
1000
2000
3000
4000
5000
6000 7000 8000
Frequency [Hz]
10000
20000
30000
40000
Figure 9: Group delay; sampling frequency 96 kHz.
Time delay between speaker and microphone compensated.
IMPULSE RESPONSE
0,04
Impulse Response [Pa/V]
0,02
0
-0,02
-0,04
-0,2
0
0,2
0,4
0,6
0,8
1
1,2
Time [ms]
1,4
1,6
1,8
2
2,2
2,4
Figure 10: Impulse response; sampling frequency 96 kHz.
Time delay between speaker and microphone compensated.
9
Adap UT-P2023 | Datasheet
Released in February 2021, updated in May 2021
USound GmbH | www.usound.com | sales@usound.com
ACOUSTIC PERFORMANCE USING
THE CARME UJ-R1020/UJ-R1030 TEST BOX IN FREE FIELD
The speaker test box ‘Carme’ is available to analyse the performance of Adap UT-P2023 MEMS speakers.
With a back volume of 100 mm³, Carme provides the necessary sealing to avoid an acoustic short circuit
and offers a convenient way to connect Adap UT-P2023 to USound’s amplifiers. Two versions of Carme are
available:
Carme UJ-R1020 has the proper electrical connection to combine it with the linear Amplifier
Amalthea UA-R3010
Carme UJ-R1030 has the proper electrical connection to combine it with the USound’s evaluation board
Helike UA-E3010
To set up the Carme test box, unscrew and separate the PCB from the shell. Remove the housing gasket and
place the MEMS speaker inside the box with the contact side up. Place the PCB by taking care to match the
orientation marks with those on the speaker. Tighten the screws for proper sealing. Using the Carme test
box, Adap UT-P2023 MEMS speakers can be measured in free field.
Figure 11: Carme UJ-R1020 for Amalthea
UA-R3010. The colour coding matches the
outputs of Amalthea UA-R3010
Figure 12: Carme UJ-R1030 for Helike UA-E3010
90
Reference adapter in baffle
Carme-box in free field
80
SPL10cm [dB]
70
60
50
40
1000
2000
3000
4000
5000
6000
8000
Frequency [Hz]
10000
20000
30000
40000
Figure 13: Adap UT-P2023 SPL measurement in the Carme UJ-R1020/UJ-R1030 test box (10 cm)
in free field
10
Adap UT-P2023 | Datasheet
Released in February 2021, updated in May 2021
USound GmbH | www.usound.com | sales@usound.com
HANDLING
GENERAL
It needs to be considered that MEMS devices consist of silicon structures and therefore, they should be
handled with care. Any bending of the MEMS speakers must be avoided while handling during the assembly
process and when permanently inside an application, otherwise the speaker can be damaged.
TWEEZERS
It is recommended to gently grip the speakers from the sides with blunt curved tweezers and avoid touching
the membrane under any circumstances to preserve its functionality and form. Using sharp tweezers while
manipulating the speakers can lead to accidentally piercing the membrane and to a loss of functionality.
The risk to damage the speaker can be further minimized if the speaker is handled with the membrane
facing down, as shown in the picture below.
Figure 14: Left: Recommended tweezer type. Right: Not recommended tweezer type
11
Adap UT-P2023 | Datasheet
Released in February 2021, updated in May 2021
USound GmbH | www.usound.com | sales@usound.com
INTEGRATION
It needs to be considered that MEMS devices consist of silicon structures and therefore, they should be
handled with care. Any bending of the MEMS speakers must be avoided while handling during the assembly
process and when permanently inside an application, otherwise the speaker can be damaged.
To avoid bending of the speaker, it’s recommended that just the defined contact areas are in contact with the
application at front side and back side of the speaker.
Contact area
0,81
0,89
Contact area
0,81
0,89
Figure 15: Recommended contact surfaces at the front side (left) and back side (right) of MEMS speaker
12
Adap UT-P2023 | Datasheet
Released in February 2021, updated in May 2021
USound GmbH | www.usound.com | sales@usound.com
SPEAKER GASKETS
In most applications the speakers need to be sealed to deliver the proper performance. This can be attained
by various means, gaskets being the most prominent. USound offers two standard gaskets optimized for
different applications. Both designs have the same footprint as the speaker and an opening similar to the
cover opening.
Name
UG-P201G
UG-P202G
Description
Open cell foam gasket with a glue layer on one
side.
Closed cell foam gasket with a glue layer on
each side.
Material
Poron 4701-50-30020-04 & TESA 4983
TESA 75635
Thickness
uncompressed
(compressed for
proper sealing)
0.53 mm (0.30 mm)
0.35 mm (0.35 mm)
Application
Suitable for prototyping
recommendations
The speaker needs to be pushed on the
gasket in order to be sealed, some mechanical
tolerance can be absorbed.
Main application is prototyping and evaluation,
where the speaker can be exchanged.
3
2
0.03
3
DETAIL B
SCALE 20 : 1
F
F
E
E
E
SECTION A-A
SCALE 10 : 1
SECTION A-A
SCALE 10 : 1
D
A
4.70 ±0.10
2.50 ±0.10
4.70 ±0.10
R1D
A
C
2.50 ±0.10
D
A
A
C
4.50 ±0.10
6.70 ±0.10
4.50 ±0.10
6.70 ±0.10
*Delivery on carrier sheets (matrix distribution).
*Delivery on carrier sheets (matrix distribution).
B
1
Do not scale the drawing. Unless
otherwise specified, tolerancces in
accordance with DIN ISO 2768
and dimensions in millimeters.
4
3
USound GmbH
Kratkystrasse 2
8020 Graz, AUSTRIA
www.usound.com
B
ID: 0000001850
DRW DATE
REV DETAILS
1
IIR
05/05/2020
INT. REF: GTGE_0401prai
PROJECT: GANYMEDE
4701-50-30020-04 +
MATERIAL: Poron
Tesa4983
Adap UT-P2023 | Datasheet
(die cut)
PURPOSE: Manufacturing
Do not scale the drawing. Unless
CONFIDENTIAL
Property of
USound
A
REV DETAILS
CONFIDENTIAL
Property of
USound
13
B
B
09/03/2020
2
D
R1
C
C
IIR
1
F
B
DRW DATE
2
Adhesive
Foam
0.50
Main application is mass production where the
speaker is mounted permanently. Disassembly
will not be possible.
4 1
F
E
The speaker does not need to be pressed
against the gasket; sticking it to the gasket
during assembly is enough.
0.35
4
Drawings
Suitable for mass production
USound GmbH
ID: 0000003812
INT. REF: GTGE_0405tsag
PROJECT: GANYMEDE
MATERIAL: Tesa 75635
PURPOSE: Manufacturing (die cut)
Atolerancces in
A otherwise
Kratkystrasse
Released
inspecified,
February
2021, updated
in2 May 2021
8020 Graz, AUSTRIA
accordance with DIN ISO 2768
www.usound.com
and dimensions
in
SHEET 1/1 | millimeters.
USound GmbH
www.usound.com
| sales@usound.com
4 1
3
2
SHEET 1/1
1
A
CONNECTIVITY
+
The speaker is driven by applying voltage between
the + and the - connection. The potential of + has to
be always equal or higher than the -. To ensure this
a DC voltage together with the AC signal has to be
applied on +.
Attention: The AC peak voltage must always be
smaller than or equal to the DC voltage.
The membrane will move downwards/inside by
applying a positive voltage on the + connection.
_
Figure 16: Electrical connections of the speaker
back side
Each speaker is equipped with an 8 x 18 digital
matrix code (DMC).
DMC Size: 3.6 mm x 1.6 mm
3.60 ±0.03
DMC format: 8x18.
Pixel size 0.2mm
LABELLING
Pixel size: 0.2 mm
Data format corresponds to the production date:
NNYCCDSSSS. For example: 0191024022
1.60 ±0.03
Figure 17: DMC at speaker backside
02
NN
Speaker type
(01 = Adap UT-P2023;
02= Achelous UT-P2020)
14
9
Y
10
2
4022
CC
D
SSSS
Week day
(First day starts
on Sunday)
Serial number
Year
Calendar week
(Last digit of
the year)
Adap UT-P2023 | Datasheet
Released in February 2021, updated in May 2021
USound GmbH | www.usound.com | sales@usound.com
PACKAGING
Thickness: 0.5 mm
QTY 150 PCS
82,26
7
ESD FOAM SUPPORT
SIZE: 325 X 138 X 13
136 ±0,8
68 ±0,8
161 ±0,8
322 ±0,8
10,90
85
150 X 5 = 750 PCS
plus 1 x empty top tray
158
342
200
750 X 9 = 6750 PCS
40
0
600
Figure 18: Packaging in tray and carton
15
Adap UT-P2023 | Datasheet
Released in February 2021, updated in May 2021
USound GmbH | www.usound.com | sales@usound.com
IMPORTANT NOTICE AND DISCLAIMER
USound GmbH (“USound”) makes no warranties for the use of USound products, other than those expressly
contained in USound’s applicable General Terms of Sale, located at www.usound.com. USound assumes no
responsibility for any errors which may have crept into this document, reserves the right to change devices
or specifications detailed herein at any time without notice, and does not make any commitment to update
the information contained herein. No license to patents or other intellectual property rights of USound are
granted in connection with the sale of USound products, neither expressly nor implicitly.
In respect of the intended use of USound products by the customer, the customer is solely responsible for
observing existing patents and other intellectual property rights of third parties and for obtaining, as the
case may be, the necessary licenses. For more information about USound patents visit
https://www.usound.com/patents/.
Important note: The use of USound products as components in medical devices and/or medical applications,
including but not limited to, safety and life supporting systems, where malfunctions of such USound
products might result in damage to and/or injury or death of persons is expressly prohibited, as USound
products are neither destined nor qualified for use as components in such medical devices and/or medical
applications. The prohibited use of USound products in such medical devices and/or medical applications is
exclusively at the risk of the customer.
16
Adap UT-P2023 | Datasheet
Released in February 2021, updated in May 2021
USound GmbH | www.usound.com | sales@usound.com
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