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TFA9881UK/N1,023

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TFA9881 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 3 — 23 April 2013 19 of 32
NXP Semiconductors
TFA9881
3.4 W PDM input class-D audio amplifier
13.3 Typical application diagram (simplified)
Fig 10. Typical stereo application (simplified)
TFA9881UK
DATA
CLK
010aaa712
A1
C1
V
DDD
B1
BASEBAND
PROCESSOR
PDM output
1.8 V
CVDDD
100 nF
battery
CVDDP
4.7 μF
OUTA
OUTB
A3
C3
left speaker
4 Ω or 8 Ω
GND
B3
LRSEL
A2
TEST
C2
V
DDP
B2
TFA9881UK
DATA
CLK
A1
C1
V
DDD
B1
1.8 V
CVDDD
100 nF
battery
CVDDP
4.7 μF
OUTA
OUTB
A3
C3
right speaker
4 Ω or 8 Ω
GND
B3
LRSEL
A2
TEST
C2
V
DDP
B2
TFA9881 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 3 — 23 April 2013 20 of 32
NXP Semiconductors
TFA9881
3.4 W PDM input class-D audio amplifier
13.4 Curves measured in reference design (demonstration board)
All measurements were taken with V
DDD
=1.8V, f
clk
= 6.144 MHz, clip control off, DPSA
off and slope normal, unless otherwise specified.
(1) f
i
= 6 kHz.
(2) f
i
= 1 kHz.
(3) f
i
= 100 Hz.
(1) f
i
= 6 kHz.
(2) f
i
= 1 kHz.
(3) f
i
= 100 Hz.
a. V
DDP
=3.6V,R
L
=8, L
L
= 44 Hb.V
DDP
=5V,R
L
=8, L
L
= 44 H
(1) f
i
= 6 kHz.
(2) f
i
= 1 kHz.
(3) f
i
= 100 Hz.
(1) f
i
= 6 kHz.
(2) f
i
= 1 kHz.
(3) f
i
= 100 Hz.
c. V
DDP
=3.6V,R
L
=4, L
L
= 20 Hd.V
DDP
=5V,R
L
=4, L
L
= 20 H
Fig 11. THD+N as a function of output power
001aam634
10
−1
10
−2
10
1
10
2
THD+N
(%)
10
−3
P
o
(W)
10
−3
10110
−2
10
−1
(1)
(2)
(3)
001aam636
10
−1
10
−2
10
1
10
2
THD+N
(%)
10
−3
P
o
(W)
10
−3
10110
−2
10
−1
(1)
(3)
(2)
001aam633
10
−1
10
−2
10
1
10
2
THD+N
(%)
10
−3
P
o
(W)
10
−3
10110
−2
10
−1
(1)
(2)
(3)
001aam635
10
−1
10
−2
10
1
10
2
THD+N
(%)
10
−3
P
o
(W)
10
−3
10110
−2
10
−1
(1)
(3)
(2)
TFA9881 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 3 — 23 April 2013 21 of 32
NXP Semiconductors
TFA9881
3.4 W PDM input class-D audio amplifier
(1) P
o
= 500 mW.
(2) P
o
= 100 mW.
(1) P
o
= 500 mW.
(2) P
o
= 100 mW.
a. V
DDP
=3.6V,R
L
=8, L
L
= 44 Hb.V
DDP
=5V,R
L
=8, L
L
= 44 H
(1) P
o
= 1 W.
(2) P
o
= 100 mW.
(1) P
o
= 1 W.
(2) P
o
= 100 mW.
c. V
DDP
=3.6V,R
L
=4, L
L
= 20 Hd.V
DDP
=5V,R
L
=4, L
L
= 20 H
Fig 12. THD+N as a function of frequency
001aam638
f
i
(Hz)
10 10
5
10
4
10
2
10
3
10
−2
10
−1
1
10
THD+N
(%)
10
−3
(1)
(2)
001aam640
f
i
(Hz)
10 10
5
10
4
10
2
10
3
10
−2
10
−1
1
10
THD+N
(%)
10
−3
(1)
(2)
001aam637
f
i
(Hz)
10 10
5
10
4
10
2
10
3
10
−2
10
−1
1
10
THD+N
(%)
10
−3
(1)
(2)
001aam639
f
i
(Hz)
10 10
5
10
4
10
2
10
3
10
−2
10
−1
1
10
THD+N
(%)
10
−3
(1)
(2)
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TFA9881UK/N1,023

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Buy TFA9881UK/N1,023
Manufacturer:
NXP Semiconductors
Description:
IC AMP AUDIO CLASSD 3.4W 9WLCSP
Lifecycle:
New from this manufacturer.
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