MAX9860
16-Bit Mono Audio Voice Codec
General Description
The MAX9860 is a low-power, voiceband, mono audio
codec designed to provide a complete audio solution
for wireless voice headsets and other mono voice audio
devices. Using an on-chip bridge-tied load mono head-
phone amplifier, the MAX9860 can output 30mW into a
32Ω earpiece while operating from a single 1.8V power
supply. Very low power consumption makes it an ideal
choice for battery-powered applications.
The MAX9860’s flexible clocking circuitry utilizes com-
mon system clock frequencies ranging from 10MHz to
60MHz, eliminating the need for an external PLL and
multiple crystal oscillators. Both the ADC and DAC sup-
port sample rates of 8kHz to 48kHz in either synchro-
nous or asynchronous operation. Both master and slave
timing modes are supported.
Two differential microphone inputs are available with a
user-programmable preamplifier and programmable
gain amplifier. Automatic gain control with selectable
attack/release times and signal threshold allows maxi-
mum dynamic range. A noise gate with selectable
threshold provides a means to quiet the channel when
no signal is present. Both the DAC and ADC digital filters
provide full attenuation for out-of-band signals as well as
a 5th order GSM-compliant digital highpass filter. A digi-
tal side tone mixer provides loopback of the micro-
phones/ADC signal to the DAC/headphone output.
Serial DAC and ADC data is transferred over a flexible
digital I
2
S-compatible interface that also supports TDM
mode. Mode settings, volume control, and shutdown are
programmed through a 2-wire, I
2
C-compatible interface.
The MAX9860 is fully specified over the -40°C to +85°C
extended temperature range and is available in a low-
profile, 4mm x 4mm, 24-pin thin QFN package.
o
1.8V Single-Supply Operation
o
Digital Highpass Elliptical Filters with Notch for
217Hz (GSM)
o
Mono 30mW BTL Headphone Amplifier
o
Dual Low-Noise Microphone Inputs
o
Automatic Microphone Gain Control and Noise
Gate
o
90dB DAC DR (f
S
= 48kHz)
o
81dB ADC DR (f
S
= 48kHz)
o
Supports Master Clock Frequencies from 10MHz
to 60MHz
o
Supports Sample Rates from 8kHz to 48kHz
o
Flexible Digital Audio Interface
o
Clickless/Popless Operation
o
2-Wire, I
2
C-Compatible Control Interface
o
Available in 24-Pin, Thin QFN, 4mm x 4mm x
0.8mm Package
Features
Ordering Information
PART
MAX9860ETG+
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
24 TQFN-EP*
+Denotes
a lead-free/RoHS-compliant package.
*EP
= Exposed pad.
Simplified Block Diagram
DVDDIO
1.7V TO 3.6V
AVDD AND DVDD
1.7V TO 1.9V
Applications
Audio Headsets
Portable Navigation Device
Mobile Phones
Smart Phones
VoIP Phones
Audio Accessories
DIGITAL AUDIO
INPUT/OUTPUT
I
2
C
INTERFACE
MAX9860
DAC
DIGITAL
AUDIO
INTERFACE
DIGITAL
FILTERING
AND
MIXERS
ADC
DIFF
MIC
DIFF
MIC
CLOCK
CONTROL
ADC
Pin Configuration and Typical Operating Circuit appear at
end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-4349; Rev 2; 2/12
MAX9860
16-Bit Mono Audio Voice Codec
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to AGND.)
DVDDIO, SDA, SCL,
IRQ.......................................-0.3V
to +3.6V
AVDD, DVDD............................................................-0.3V to +2V
AGND, DGND, MICGND .......................................-0.3V to +0.3V
OUTP, OUTN, PREG, REF, MICBIAS .....-0.3V to (V
AVDD
+ 0.3V)
MICLP, MICLN, MICRP, MICRN, REG....-0.3V to (V
PREG
+ 0.3V)
MCLK, LRCLK, BCLK,
SDOUT, SDIN..................................-0.3V to (V
DVDDIO
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
24-Pin TQFN (derate 27.8mW/°C above +70°C,
multilayer board) ......................................................2222mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
TQFN
Junction-to-Ambient Thermal Resistance (θ
JA
)...............36°C/W
Junction-to-Case Thermal Resistance (θ
JC
)......................3°C/W
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
ELECTRICAL CHARACTERISTICS
(V
AVDD
= V
DVDD
= V
DVDDIO
= +1.8V, R
L
=
∞,
headphone load (R
L
) connected between OUTP and OUTN, C
REF
= 2.2µF, C
MICBIAS
=
C
PREG
= C
REG
= 1µF, A
VPRE
= +20dB, A
VMICPGA
= 0dB, f
MCLK
= 13MHz, f
LRCLK
= 8kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
AVDD (inferred from HP output PSRR)
Supply Voltage Range
DVDD (inferred from codec performance
tests)
DVDDIO
DAC playback mode
(48kHz)
Full operation
8kHz mono ADC + DAC
I
AVDD+DVDD
Full operation
8kHz stereo ADC + DAC
Stereo ADC only (48kHz)
AVDD
DVDD
AVDD
DVDD
AVDD
DVDD
AVDD
DVDD
AVDD
Shutdown Supply Current
Shutdown to Full Operation
DAC (Note 4)
Gain Error
Dynamic Range (Note 5)
DAC Full-Scale Output
DAC Path Phase Delay
f = 1kHz, 0dBFS, HP
filter disabled, digital
input to analog output
THD+N
f
S
= 8kHz
f
S
= 16kHz
DR
+0dB volume setting, f
S
= 8kHz, measured
at headphone output, T
A
= +25°C
84
I
SHDN
T
A
= +25°C
DVDD +
DVDDIO
MIN
1.7
1.7
1.7
TYP
1.8
1.8
1.8
1.46
1.05
4.08
0.78
6.17
0.8
5.38
1.68
0.56
1.65
10
±1
90
1
1.2
ms
0.59
-87
dB
Maxim Integrated
MAX
1.9
1.9
3.6
2.2
1.6
5.7
1.0
9.0
1.2
8.0
2.2
5
5
UNITS
V
Total Supply Current
(Note 3)
mA
µA
ms
±5
%
dB
V
RMS
Total Harmonic Distortion + Noise
2
f = 1kHz, f
MCLK
= 12.288MHz,
f
LRCLK
= 48kHz
MAX9860
16-Bit Mono Audio Voice Codec
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
DVDD
= V
DVDDIO
= +1.8V, R
L
=
∞,
headphone load (R
L
) connected between OUTP and OUTN, C
REF
= 2.2µF, C
MICBIAS
=
C
PREG
= C
REG
= 1µF, A
VPRE
= +20dB, A
VMICPGA
= 0dB, f
MCLK
= 13MHz, f
LRCLK
= 8kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
f = 1kHz, V
RIPPLE
= 100mV
P-P
,
A
VPGA
= 0dB
f = 10kHz, V
RIPPLE
= 100mV
P-P
,
A
VPGA
= 0dB
DAC LOWPASS DIGITAL FILTER
Passband Cutoff
Passband Ripple
Stopband Cutoff
Stopband Attenuation
DAC HIGHPASS DIGITAL FILTER
DVFLT = 0x1
(elliptical for 16kHz GSM)
DVFLT = 0x2
(500Hz Butterworth for 16kHz)
5th Order Passband Cutoff
(-3dB from Peak, I
2
C Register
Programmable) (Note 6)
f
DHPPB
DVFLT = 0x3
(elliptical for 8kHz GSM)
DVFLT = 0x4
(500Hz Butterworth for 8kHz)
DVFLT = 0x5
(200Hz Butterworth for 48kHz)
DVFLT = 0x1
(elliptical for 16kHz GSM)
DVFLT = 0x2
(500Hz Butterworth for 16kHz)
5th Order Stopband Cutoff
(-30dB from Peak, I
2
C Register
Programmable) (Note 6)
f
DHPSB
DVFLT = 0x3
(elliptical for 8kHz GSM)
DVFLT = 0x4
(500Hz Butterworth for 8kHz)
DVFLT = 0x5
(200Hz Butterworth for 48kHz)
DC Blocking
ADC
Full-Scale Input Voltage
Channel Gain Mismatch
Maxim Integrated
MIN
TYP
94
MAX
UNITS
Power-Supply Rejection Ratio
PSRR
dB
71
f
PLP
With respect to f
S
within ripple; f
S
= 8kHz
to 48kHz
-3dB cutoff
f < f
PLP
0.448 x
f
S
0.451
±0.1
0.476 x
f
S
75
0.0161
x f
S
0.0312
x f
S
0.0321
x f
S
0.0625
x f
S
0.0042
x f
S
0.0139
x f
S
0.0156
x f
S
0.0279
x f
S
0.0312
x f
S
0.0021
x f
S
90
Hz
f
S
dB
Hz
dB
f
SLP
With respect to f
S
; f
S
= 8kHz to 48kHz
f > f
SLP
, f = 20Hz to 20kHz
Hz
Hz
DC
Atten
DVFLT
≠
0x0
Differential MIC Input, A
VPRE
= 0dB,
A
VPGA
= 0dB
dB
0dBFS
1
±0.3
V
P-P
%
3
MAX9860
16-Bit Mono Audio Voice Codec
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
DVDD
= V
DVDDIO
= +1.8V, R
L
=
∞,
headphone load (R
L
) connected between OUTP and OUTN, C
REF
= 2.2µF, C
MICBIAS
=
C
PREG
= C
REG
= 1µF, A
VPRE
= +20dB, A
VMICPGA
= 0dB, f
MCLK
= 13MHz, f
LRCLK
= 8kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
Dynamic Range (Note 5)
SYMBOL
DR
CONDITIONS
f
S
= 8kHz, A
VPRE
= 0dB,
A-weighted from 20Hz to f
S
/2
f
S
= 48kHz, A
VPRE
= 0dB, T
A
= +25°C
ADC Phase Delay
Total Harmonic Distortion
THD
f = 1kHz, 0dBFS, HP filter
disabled, analog input to
digital output
f
S
= 8kHz
f
S
= 16kHz
-70
75
MIN
TYP
81
83
1.2
ms
0.61
-75
82
dB
76
-92
0.445 x
f
S
0.449
±0.1
0.469 x
f
S
74
0.0161
x f
S
0.0312
x f
S
0.0321
x f
S
0.0625
x f
S
0.0042
x f
S
Hz
dB
dB
MAX
UNITS
dB
f = 1kHz, f
S
= 48kHz, T
A
= +25°C
f = 1kHz, V
RIPPLE
= 100mV
P-P
,
A
VPGA
= 0dB
f = 10kHz, V
RIPPLE
= 100mV
P-P
,
A
VPGA
= 0dB
Power-Supply Rejection Ratio
PSRR
Channel Crosstalk
ADC LOWPASS DIGITAL FILTER
Passband Cutoff
Passband Ripple
Stopband Cutoff
Stopband Attenuation
ADC HIGHPASS DIGITAL FILTER
f
SLP
f
PLP
Driven channel at -1dBFS, f = 1kHz
With respect to f
S
within ripple;
f
S
= 8kHz to 48kHz
-3dB cutoff
f < f
PLP
With respect to f
S
; f
S
= 8kHz to 48kHz
f > f
SLP
Hz
f
S
dB
Hz
dB
AVFLT = 0x1 (elliptical for 16kHz GSM)
AVFLT = 0x2 (500Hz Butterworth for
16kHz)
5th Order Passband Cutoff
(-3dB from Peak, I
2
C Register
Programmable) (Note 6)
f
AHPPB
AVFLT = 0x3 (elliptical for 8kHz GSM)
AVFLT = 0x4
(500Hz Butterworth for 8kHz)
AVFLT = 0x5
(200Hz Butterworth for 48kHz)
4
Maxim Integrated
MAX9860
16-Bit Mono Audio Voice Codec
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
DVDD
= V
DVDDIO
= +1.8V, R
L
=
∞,
headphone load (R
L
) connected between OUTP and OUTN, C
REF
= 2.2µF, C
MICBIAS
=
C
PREG
= C
REG
= 1µF, A
VPRE
= +20dB, A
VMICPGA
= 0dB, f
MCLK
= 13MHz, f
LRCLK
= 8kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
AVFLT = 0x1
(elliptical for 16kHz GSM)
AVFLT = 0x2
(500Hz Butterworth for 16kHz)
5th Order Stopband Cutoff
(-30dB from peak, I
2
C Register
Programmable) (Note 6)
f
AHPSB
AVFLT = 0x3
(elliptical for 8kHz GSM)
AVFLT = 0x4
(500Hz Butterworth for 8kHz)
AVFLT = 0x5
(200Hz Butterworth for 48kHz)
DC Blocking
CLOCKING
MCLK Input Frequency
MCLK Duty Cycle
Maximum MCLK Input Jitter
LRCLK Data Rate Frequency
LRCLK PLL Lock Time
LRCLK Acceptable Jitter for
Maintaining PLL Lock
MONO HEADPHONE AMPLIFIER
Output Power
Total Harmonic Distortion + Noise
Dynamic Range (Note 5)
P
OUT
THD+N
DR
f = 1kHz, THD+N
≤
1%
T
A
= +25°C
R
L
= 16Ω
R
L
= 32Ω
30
50
33
0.05
0.08
90
60
84
86
71
± 3.5
R
L
= 32Ω
R
L
=
∞
500
100
-70
mV
pF
dBV
dB
mW
%
dB
For guaranteed performance limits
8
12
±20
DC
ATTEN
AVFLT
≠
0x0
MCLK is not required to be synchronous
or related to the desired LRCLK data rate
MIN
TYP
0.0139
x f
S
0.0156
x f
S
0.0279
x f
S
0.0312
x f
S
0.0021
x f
S
90
dB
Hz
MAX
UNITS
10
40
50
100
60
60
48
25
MHz
%
ps
RMS
kHz
ms
ns
R
L
= 32Ω, P
OUT
= 25mW, f = 1kHz
R
L
= 16Ω, P
OUT
= 25mW, f = 1kHz
+0dB volume setting, DAC input at
f
S
= 8kHz to 48kHz
V
AVDD
= 1.7V to 1.9V
V
RIPPLE
= 100mV
P-P
, f = 217Hz
V
RIPPLE
= 100mV
P-P
, f = 20kHz
V
OUTP
- V
OUTN,
T
A
=+25°C
No sustained oscillations
Power-Supply Rejection Ratio
Output Offset Voltage
Capacitive Drive Capability
Click-and-Pop Level
PSRR
V
OS
Peak voltage into/out of shutdown, 32sps,
A-weighted
Maxim Integrated
5
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