max9860 Maxim Integrated Products, Inc., max9860 Datasheet
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max9860
Manufacturer Part Number
max9860
Description
16-bit Mono Audio Voice Codec
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.MAX9860.pdf
(39 pages)
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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
mode. Mode settings, volume control, and shutdown are
programmed through a 2-wire, I
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.
19-4349; Rev 0; 10/08
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.maxim-ic.com.
Audio Headsets
Portable Navigation Device
Mobile Phones
Smart Phones
VoIP Phones
Audio Accessories
2
S-compatible interface that also supports TDM
________________________________________________________________ Maxim Integrated Products
General Description
2
C-compatible interface.
Applications
16-Bit Mono Audio Voice Codec
♦ 1.8V Single-Supply Operation
♦ Digital Highpass Elliptical Filters with Notch for
♦ Mono 30mW BTL Headphone Amplifier
♦ Dual Low-Noise Microphone Inputs
♦ Automatic Microphone Gain Control and Noise
♦ 90dB DAC DR (f
♦ 81dB ADC DR (f
♦ Supports Master Clock Frequencies from 10MHz
♦ Supports Sample Rates from 8kHz to 48kHz
♦ Flexible Digital Audio Interface
♦ Clickless/Popless Operation
♦ 2-Wire, I
♦ Available in 24-Pin, Thin QFN, 4mm x 4mm x
+ Denotes a lead-free/RoHS-compliant package.
* EP = Exposed pad.
INPUT/OUTPUT
DIGITAL AUDIO
217Hz (GSM)
Gate
to 60MHz
0.8mm Package
MAX9860ETG+
PART
2
C-Compatible Control Interface
Simplified Block Diagram
INTERFACE
INTERFACE
CONTROL
DIGITAL
CLOCK
AUDIO
I
2
S
S
C
1.7V TO 3.6V
= 48kHz)
= 48kHz)
-40°C to +85°C
DVDDIO
TEMP RANGE
Ordering Information
FILTERING
DIGITAL
MIXERS
AND
MAX9860
AVDD AND DVDD
DAC
ADC
ADC
1.7V TO 1.9V
PIN-PACKAGE
24 TQFN-EP*
Features
DIFF
MIC
DIFF
MIC
1