NAU8810
Differential/Mono Audio Codec with 2-wire Interface Control Interface
1.
GENERAL DESCRIPTION
emPowerAudio
™
The NAU8810 a cost effective low power wideband Monophonic audio CODEC. It is suitable for a wide range of
audio applications, including voice telephony. Supported functions include a 5-band Graphic Equalizer, Automatic
Level Control (ALC) with noise gate, PGA, standard I2S or PCM audio interface, optional PCM time slot
assignment, and a full fractional-N on-chip PLL. This device includes one differential microphone input, and
multiple variable gain control stages in the audio paths. Both a Mono headset/line-level output and a high power
differential BTL speaker driver output are provided.
The analog input path includes a PGA enabling dynamic range optimization of a wide range of input sources with
programmable gain from -12dB to +35.25dB. In addition to a digital high pass filter to remove DC offset voltages,
the ADC also features programmable voice band digital filtering. Audio data is communicated via the audio
interface that supports multiple I2S and PCM data formats. The DAC converter path includes filtering, and mixing,
programmable-gain amplifiers, and soft muting. The 2-Wire digital control interface has an independent supply
voltage to enable easy integration into multiple supply voltage systems. The NAU88U10 operates at supply
voltages from 2.5V to 3.6V, and the digital core can operate at a voltage as low as 1.71V to conserve power.
The NAU8810 is specified for operation from -40C to +85C, and is available with automotive AEC-Q100
qualification. Please refer to ordering information for AEC-Q100 compliance part number.
2.
FEATURES
24-bit signal processing linear Audio CODEC
Audio DAC: 93dB SNR and -84dB THD
Audio ADC: 91dB SNR and -79dB THD
Support variable sample rates from 8 - 48kHz
Analog I/O
Integrated programmable Microphone Amplifier
Integrated BTL Speaker Driver 1 W (8Ω / 5V)
Earphone / Speaker / Line-Output Mixing / Routing
Integrated Headset Driver 40mW (16Ω / 3.3V)
Low Noise bias supply voltage for microphone
On-chip full fractional-N PLL
Interfaces
I
2
S digital interface PCM time slot assignment
2-Wire serial control Interface (I
2
C style; /Write capable)
emPowerAudio
™
Datasheet Revision 2.8
Page 1 of 102
March 1, 2017
NAU8810
Low Power, Low Voltage
Analog Supply: 2.5V to 3.6V
Digital Supply: 1.71V to 3.6V
Nominal Operating Voltage: 3.3V
Additional features
5-band Graphic Equalizer
Programmable ALC
ADC Notch Filter
Programmable High Pass Filter
Digital ADC/DAC Passthrough
Mono data output on both channels
Automotive AEC-Q100 grade 3 & TS16949 qualification, tested to a higher reliability standard
Temperature: –40C to +85C
Applications
All types of wired/wireless telephony
Security Systems
Mobile Telephone Hands-free Kits
Residential & Consumer Intercoms
MIC-
MIC+
Microphone
Interface
Input
Mixers &
Gain
Stage
ADC
ADC Filter
Volume
Control
HPF
Notch
Filter
MOUT
DAC Filter
Volume
Control
Limiter
DAC
Output
Mixers
SPKOUT+
-1
SPKOUT-
MICBIAS
Microphone
Bias
Digital Audio Interface
IS
2
Control IF
2-wire
PCM
Audio I/O
Digital I/O
emPowerAudio
™
Datasheet Revision 2.8
Page 2 of 102
March 1, 2017
NAU8810
4.
PIN DESCRIPTION
24-Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Microphone Bias
Analog Supply
Analog Ground
Digital Supply
Digital Ground
Digital Audio Data Output
Digital Audio Data Input
Frame Sync
Bit Clock
Master Clock
2-Wire Serial Clock
2-Wire I/O
MONO Output
Speaker Positive Output
Speaker Ground
Speaker Negative Output
Speaker Supply
Decoupling internal analog mid supply reference
Microphone Negative Input
voltage
Microphone Positive Input
Table 1: Pin Description
Functionality
A/D
A
A
A
D
D
D
D
D
D
D
D
D
A
A
A
A
A
A
A
A
Pin Type
O
I
O
I
O
O
I
I/O
I/O
I
I
O
O
O
O
O
I
O
I
I
Pin Name
MICBIAS
VDDA
VSSA
VDDD
VSSD
ADCOUT
DACIN
FS
BCLK
MCLK
SCLK
SDIO
MOUT
SPKOUT+
VSSSPK
SPKOUT-
VDDSPK
VREF
MIC-
MIC+
Notes
1.
The 20-QFN package includes a bulk ground connection pad on the underside of the chip. This bulk ground
should be thermally tied to the PCB, and electrically tied to the analog ground.
2.
3.
Unused analog input pins should be left as no-connection.
Any unused digital input pin must be tied high or low as appropriate.
emPowerAudio
™
Datasheet Revision 2.8
Page 4 of 102
March 1, 2017
DIY/Open Source Hardware
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