MAXIM MAX9856 User Manual
General Description
The MAX9856 is a high-performance, low-power stereo
audio CODEC designed for MP3, personal media players (PMPs), or other portable multimedia devices.
Using on-board stereo DirectDrive
®
headphone amplifiers, the CODEC can output 30mW into stereo 32Ω
headphones while operating from a single 1.8V power
supply. Very low 9mW playback power consumption
makes it an ideal choice for battery-powered applications. The MAX9856 provides microphone input amplifiers, plus flexible input selection, signal mixing, and
automatic gain control (AGC). Comprehensive loadimpedance sensing allows the MAX9856 to autodetect
most common audio and audio/video headset and jack
plug types.
Outputs include stereo DirectDrive line outputs and
DirectDrive headphone amplifiers. The stereo ADC can
convert audio signals from either internal or external
microphones that can be configured for single-ended
or differential signal inputs. Line inputs can be configured as stereo, differential, or mono and fed through
one channel of the microphone path. The analog inputs
selected can be gain ranged or mixed with other input
sources prior to conversion to digital. The ADC path
also features programmable digital highpass filters to
remove DC offset voltages and wind noise.
The MAX9856 supports all common sample rates from
8kHz to 48kHz in both master and slave mode. The serial digital audio interfaces support a variety of formats
including I
2
S, left-justified, and PCM modes.
The MAX9856 uses a thermally efficient, space-saving
40-pin, 6mm x 6mm x 0.8mm TQFN package.
Applications
MP3 Players
Personal Media Players
Handheld Gaming Consoles
Cellular Phones
Features
o 1.71V to 3.6V Single-Supply Operation
o Stereo 30mW DirectDrive Headphone Amplifier
o Stereo 1V
RMS
DirectDrive Line Outputs
(V
DD
= 1.8V) and Stereo Line Inputs
o Low-Noise Stereo and Mono Differential
Microphone Inputs with Automatic Gain Control
and Noise Quieting
o 9mW Playback Power Consumption (V
DD
= 1.8V)
o 91dB 96kHz 18-Bit Stereo DAC
o 85dB 48kHz 18-Bit Stereo ADC
o Supports Any Master Clock Frequency from
10MHz to 60MHz
o ADCs and DACs Can Run at Independent Sample
Rates
o Flexible Audio Mixing and Volume Control
o Clickless/Popless Operation
o Headset Detection Logic
o I
2
C Control Interface
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
Simplified Block Diagram
19-1288; Rev 2; 12/11
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.
EVALUATION KIT
AVAILABLE
+
Denotes a lead-free/RoHS-compliant package.
*
EP = Exposed pad.
/V denotes an automotive qualified part.
Pin Configuration appears at end of data sheet.
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
PART TEMP RANGE PIN-PACKAGE
MAX9856ETL+ -40°C to +85°C 40 TQFN-EP*
MAX9856GTL/V+ -40°C to +105°C 40 TQFN-EP*
AND DVDDS2
DVDD
1.71V TO 3.6V
AVDD AND CPVDD
1.71V TO 3.6V
MAX9856
AUXIN
LINEIN1
LINEIN2
SDOUT
SDIN
BCLK
LRCLK_D
LRCLK_A
SDA
SCL
MUX
DIGITAL
INTERFACE
2
C
I
IRQ
DIGITAL
FILTERING
AND
MIXERS
CLOCK
CONTROL
MCLK
DAC
DAC
ADC
ADC
ANALOG
MIXERS
LEFT LINE
OUT
RIGHT LINE
OUT
DIFF
MIC
LEFT
EXT
MIC
RIGHT
EXT
MIC
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
AVDD
= V
CPV
DD
= V
DV
DDS2
= V
DV
DD
= 1.8V, RHP= 32Ω, R
LINE
= 10kΩ, C1 = 4.7µF, C2 = 4.7µF, C
REF
= C
MBIAS
= C
PREG
=
C
NREG
= 1µF, A
V
PRE
= +20dB, C
MICBIAS
= 1µF, A
VMIGPGA
= 0dB, f
MCLK
= 11.2896MHz, DRATE = 00, TA= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
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.
(Voltages with respect to AGND.)
AVDD, DVDD, DVDDS2, CPVDD .............................-0.3V to +4V
PVSS, SVSS........................................Capacitor connection only
AGND, DGND, CPGND.........................................-0.3V to +0.3V
HPL, HPR .................................(V
SVSS
- 0.3V) to (V
AVDD
+ 0.3V)
HGNDSNS, LGNDSNS, MICGND .........................-0.3V to +0.3V
JACKSNS .................................(V
SVSS
- 0.3V) to (V
AVDD
+ 0.3V)
LOUTL, LOUTR ........................(V
SVSS
- 0.3V) to (V
AVDD
+ 0.3V)
LINEIN1, LINEIN2, AUXIN ...........................................-2V to +2V
MICL, MICR, INLP, INLM, INRM..................................-2V to +2V
C1N........................................(V
PVSS
- 0.3V) to (V
CPGND
+ 0.3V)
C1P .....................................(V
CPGND
- 0.3V) to (V
CPVDD
+ 0.3V)
PREG, REF, MBIAS, MICBIAS................-0.3V to (V
AVDD
+ 0.3V)
NREG ......................................................(V
SVSS
- 0.3V) to +0.3V
MCLK........................................................................-0.3V to +4V
SDA, SCL, IRQ .........................................................-0.3V to +4V
LRCLK_A, LRCLK_D, BCLK,
SDIN, SDOUT ..................................-0.3V to (V
DVDDS2
+ 0.3V)
Continuous Current Into/Out of HPR/HPL/
LOUTL/LOUTR ...............................................................150mA
CPVDD/CPGND/C1P/C1N/PVSS ......................................300mA
Any Other Pin ......................................................................20mA
Duration of HPR/HPL/LOUTL/LOUTR Short Circuit
to AVDD/AGND/CPVDD/CPGND ............................Continuous
Continuous Power Dissipation (T
A
= +70°C)
40-Pin TQFN (derate 26.3mW/°C above +70°C,
single-layer board) ......................................................2105mW
40-Pin TQFN (derate 37mW/°C above +70°C,
multilayer board) .........................................................2963mW
Operating Temperature Ranges:
E Series.............................................................-40°C to +85°C
G Series ..........................................................-40°C to +105°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
AVDD = CPVDD (inferred from HP output
Supply Voltage Range
PSRR)
DVDD, DVDDS2 (inferred from CODEC
performance tests)
DAC playback mode
(f
= 44.1kHz) analog
S
Line-only playback mode
(DAC/ADC disabled)
DAC + line input
playback mode
(f
= 44.1kHz)
S
Total Supply Current (Note 2) I
VDD
Full operation, fS =
44.1kHz (DAC + ADC +
LINEIN + MIC + AUXIN)
DAC playback, fS =
44.1kHz mono ADC
record f
= 8kHz
S
ADC record,
f
= 44.1kHz
S
I
+ I
Shutdown Supply Current
AVDD
I
DVDD
+ I
CPVDD
DVDDS2
Shutdown to Full Operation 50 ms
1.71 1.80 3.60
1.71 1.80 3.60
I
AVDD
I
DVDD
I
AVDD
I
DVDD
I
AVDD
I
DVDD
I
AVDD
I
DVDD
I
AVDD
I
DVDD
I
AVDD
I
DVDD
+ I
+ I
+ I
+ I
+ I
+ I
+ I
+ I
+ I
+ I
+ I
+ I
CPVDD
DVDDS2
CPVDD
DVDDS2
CPVDD
DVDDS2
CPVDD
DVDDS2
CPVDD
DVDDS2
CPVDD
DVDDS2
2.9 5.1
2.3
2.9 4.3
0.14 0.20
3.9 5.4
2.3 3.5
11.0 15.5
3.7 4.5
6.6 9.1
2.8 3.5
7.8 10.5
2.3 3.5
2.2 10
0.6 10
V
mA
µA
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
CPV
DD
= V
DV
DDS2
= V
DV
DD
= 1.8V, RHP= 32Ω, R
LINE
= 10kΩ, C1 = 4.7µF, C2 = 4.7µF, C
REF
= C
MBIAS
= C
PREG
=
C
NREG
= 1µF, A
V
PRE
= +20dB, C
MICBIAS
= 1µF, A
VMIGPGA
= 0dB, f
MCLK
= 11.2896MHz, DRATE = 00, TA= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
STEREO DAC (Note 3)
Gain Error ±1 ±5 %
Channel Gain Mismatch ±1 %
DAC DYNAMIC SPECIFICATIONS
fS = 44.1kHz, A-weighted, DRATE = 10 80 91
Dynamic Range (Note 4)
= 8kHz to 96kHz,
f
S
A-weighted
DRATE = 00 87
DRATE =10 91
Total Harmonic Distortion THD fIN = 1kHz, fS = 8kHz to 96kHz, 0dBFS 82 dB
Signal-to-Noise Ratio SNR
Crosstalk
Power-Supply Rejection Ratio PSRR
f
= 8kHz to 96kHz,
S
A-weighted (Note 5)
Driven channel at -1dBFS, f
= 8kHz
f
S
f = 217Hz, V
f = 10kHz, V
RIPPLE
RIPPLE
= 100mV, A
= 100mV, A
DRATE = 00 87
DRATE = 10 91
= 1kHz,
IN
= 0dB 93
VPGA
= 0dB 60
VPGA
78 dB
DAC DIGITAL FILTER (8x interpolation, FIR (fS = 7.8kHz to 50kHz))
Passband Cutoff f
Passband Ripple f < 0.44 x f
Stopband Cutoff f
Stopband Attenuation f > f
-0.2dB from peak 0.44 f
P
S
S
S
±0.1 dB
0.58 f
58 dB
Attenuation at fS/2 -6.02 dB
DAC DIGITAL FILTER (4x interpolation, FIR (fS = 50kHz to 100kHz))
Passband Cutoff f
Passband Ripple f < 0.23 x f
Stopband Cutoff f
Stopband Attenuation f > f
-0.2dB from peak 0.24 f
P
S
S
S
±0.1 dB
0.5 f
54 dB
Attenuation at fS/2 -60 dB
DAC HIGHPASS FILTER
DACHP = 000 Disabled
DACHP = 001; LRCLK/1598 28
DACHP = 010; LRCLK/798 55
-3dB Corner Frequency
= 44.1kHz)
(f
S
HP
DACHP = 011; LRCLK/398 111
FILT
DACHP = 100; LRCLK/197 224
DACHP = 101; LRCLK/97 455
DACHP = 110; LRCLK/47 938
DACHP = 111; LRCLK/22 2004
DC Attenuation DC
ATTEN
DACHP ≠ 000 60 dB
dB
dB
dB
S
S
S
S
Hz
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
CPV
DD
= V
DV
DDS2
= V
DV
DD
= 1.8V, RHP= 32Ω, R
LINE
= 10kΩ, C1 = 4.7µF, C2 = 4.7µF, C
REF
= C
MBIAS
= C
PREG
=
C
NREG
= 1µF, A
V
PRE
= +20dB, C
MICBIAS
= 1µF, A
VMIGPGA
= 0dB, f
MCLK
= 11.2896MHz, DRATE = 00, TA= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
STEREO ADC (Note 6)
Gain Error ±1 ±5 %
Full-Scale Conversion 0dBFS fIN = 1kHZ, line input PGA = 0dB 2 V
Channel Gain Mismatch ±1 %
ADC DYNAMIC SPECIFICATIONS
fS = 8kHz to 32kHz, BW = 22Hz to fS/2 80
Dynamic Range (Note 4)
Total Harmonic Distortion THD
fS = 44.1kHz, BW = 22Hz to 20kHz,
A-weighted
f
= 48kHz, BW = 22Hz to 20kHz,
S
A-weighted
1kHz, 0dBFS, fS = 8kHz -63
1kHz, 0dBFS, f
= 48kHz -68
S
1kHz, 0dBFS, fS = 8kHz, BW = 22Hz to
20kHz, A-weighted
78 84
85
77
Signal-to-Noise Ratio SNR
Channel Crosstalk
Power-Supply Rejection Ratio
(Note 7)
PSRR
1kHz, 0dBFS, f
20kHz, A-weighted
Driven channel at -1dBFS, f
= 8kHz
f
S
V
= 1.71V to 3.6V 60 100
AVDD
f = 1kHz, V
f = 10kHz, V
= 48kHz, BW = 22Hz to
S
= 1kHz,
IN
= 100mV 80
RIPPLE
= 100mV 50
RIPPLE
77
65 dB
ADC DIGITAL FILTER PATH
Passband Cutoff f
Passband Ripple f < f
Stopband Cutoff f
Stopband Attenuation f > f
-0.2dB from peak 0.44 f
P
P
S
S
±0.1 dB
0.56 f
60 dB
Attenuation at fS/2 -6.02 dB
ADC HIGHPASS FILTER
ADCHP = 000 Disabled
ADCHP = 001; LRCLK/1598 28
ADCHP = 010; LRCLK/798 55
-3dB Corner Frequency
(f
= 44.1kHz)
S
HP
FILT
ADCHP = 011; LRCLK/398 111
ADCHP = 100; LRCLK/197 224
ADCHP = 101; LRCLK/97 455
ADCHP = 110; LRCLK/47 938
ADCHP = 111; LRCLK/22 2004
DC Attenuation DC
ATTEN
ADCHP anything other than 000 90 dB
DC Output Offset ADCHP = 000 -40 dBFS
P-P
dB
dB
dB
dB
S
S
Hz
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
CPV
DD
= V
DV
DDS2
= V
DV
DD
= 1.8V, RHP= 32Ω, R
LINE
= 10kΩ, C1 = 4.7µF, C2 = 4.7µF, C
REF
= C
MBIAS
= C
PREG
=
C
NREG
= 1µF, A
V
PRE
= +20dB, C
MICBIAS
= 1µF, A
VMIGPGA
= 0dB, f
MCLK
= 11.2896MHz, DRATE = 00, TA= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ADC/DAC DATA RATE ACCURACY
LRCLK_D and LRCLK_A Output
Average Sample Rate Deviation
(Note 8) -0.025 +0.025 %
(Master Mode, Any MCLK)
LRCLK_D Output Sample Rate
Deviation (Master Mode)
LRCLK Input Sample Rate Range
(Slave Mode)
LRCLK_D and LRCLK_A PLL
Lock Time
LRCLK_D and LRCLK_A
Acceptable Jitter for Maintaining
PLL Lock (All Slave Modes)
t
LOCK
PCLK/LRCLK = 1536, 1024, 768, 512, 384,
256, 192, or 128
0%
LRCLK_A, LRCLK_D (DHF = 0) 7.8 50
LRCLK_D (DHF = 1) 15.6 100
Any allowable LRCLK and PCLK rates 12 25 ms
Allowable LRCLK period change from
nominal for slave PLL mode at any
±20 ns
allowable LRCLK and PCLK rates
HEADPHONE AMPLIFIERS
Output Power P
OUT
f = 1kHz, THD < 1%,
= +25°C
T
A
RL = 16Ω 35
R
= 32Ω 15 28
L
0dBFS DAC Output Voltage +0dB volume setting 3.40 3.51 3.80 V
Line In to HP Out Voltage Gain +4.5dB volume setting, 0dB PGA setting 1.77 V/V
Output Offset Voltage V
Total Harmonic Distortion Plus
Noise
OS
THD+N
Dynamic Range DR
Capacitive Drive C
Crosstalk
Channel Gain Matching A
VMATCH
Click-and-Pop Level
TA = +25°C, -40dB volume setting ±0.6 ±4 mV
RL = 32Ω, P
= 16Ω, P
R
L
+5.5dB volume setting, DAC input at
= 44.1kHz (Note 4)
f
S
V
= 1.71V to 3.6V 70 94
AVDD
V
= 100mV
RIPPLE
V
= 100mV
RIPPLE
No sustained oscillations 150 pF
L
= 1.6mW, f = 1kHz, (HPL to HPR) or
P
OUT
(HPR to HPL)
= 25mW, f = 1kHz 0.03
OUT
= 25mW, f = 1kHz 0.05
OUT
80 91 dB
, f = 217Hz 80Power-Supply Rejection Ratio PSRR
P-P
, f = 10kHz 50
P-P
69 dB
±2 %
Peak voltage,
A-weighted, 32 samples
per second
Into shutdown -70
Out of shutdown -70
LINE AMPLIFIERS
0dBFS DAC Output Voltage 1.0 V
Line-In to Line-Out Voltage Gain 0dB input PGA setting 1.3 1.34 1.4 V/V
Output Offset Voltage V
OS
TA = +25°C ±0.7 ±10 mV
kHz
mW
P-P
%
dB
dBV
RMS
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
6 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
CPV
DD
= V
DV
DDS2
= V
DV
DD
= 1.8V, RHP= 32Ω, R
LINE
= 10kΩ, C1 = 4.7µF, C2 = 4.7µF, C
REF
= C
MBIAS
= C
PREG
=
C
NREG
= 1µF, A
V
PRE
= +20dB, C
MICBIAS
= 1µF, A
VMIGPGA
= 0dB, f
MCLK
= 11.2896MHz, DRATE = 00, TA= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
Total Harmonic Distortion Plus
Noise
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
THD+N V
= 1V
OUT
, f = 1kHz 0.024 %
RMS
Signal-to-Noise Ratio SNR 98 dB
V
= 1.71V to 3.6V 70 108
AVDD
dB
Capacitive Drive C
Crosstalk
Channel Gain Matching A
VMATCH
V
= 100mV
RIPPLE
= 100mV
V
RIPPLE
No sustained oscillations 150 pF
L
V
= 2V
OUT
P-P
or (LOUTR to LOUTL)
, f = 217Hz 93Power-Supply Rejection Ratio PSRR
P-P
, f = 10kHz 60
P-P
, f = 1kHz, (LOUTL to LOUTR)
98 dB
±2 %
VOLUME CONTROL
Headphone Volume Control
Range
-74.0 +5.5 dB
5.5dB to 2dB 0.5
Headphone Volume Control Step
Size
+2.5dB to -2dB 1
-2dB to -46dB 2
dB
-46dB to -74dB 4
Headphone Mute Attenuation f = 1kHz 92 dB
CHARGE PUMP
Charge-Pump Oscillator
Frequency
f
OSC
TA = +25°C 600 665 720 kHz
MICROPHONE AMPLIFIERS
PALEN/PAREN = 01 -0.5 0 +0.5
Preamplifier Gain A
VPRE
MICL or MICR
PALEN/PAREN = 10 19 20 21
dB
PALEN/PAREN = 11 28.5 30.0 31.5
MIC PGA Gain A
VMICPGA
PGAML/R = 0x20 -0.5 0 +0.5
PGAML/R = 0x00 19.5 20.0 19.5
dB
MIC PGA Gain Step Size 1dB
MIC Mute Attenuation f = 1kHz 92 dB
INL±, V
Common-Mode Rejection Ratio CMRR
A
VPRE
IN
= +20dB
INL±, MICL or MICR, A
MIC Input Resistance R
IN_MIC
INL±, MICL or MICR, A
INL±, MICL or MICR, A
MIC Input Resistance Matching R
MIC Input Bias Voltage V
MATCH
CML
INL+ to INL- or MICL/MICR to AGND 1 %
Measured at INL±, MICR, MICL, and AGND -0.05 0 +0.05 V
Input Voltage Noise f = 1kHz, A
= 100mV
VPRE
at 217Hz,
P-P
= +30dB 4 8 10
VPRE
= +20dB 12 18 28
VPRE
= 0dB 60 100 160
VPRE
73 dB
kΩ
= +30dB 15 nV/√Hz
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
_______________________________________________________________________________________ 7
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
CPV
DD
= V
DV
DDS2
= V
DV
DD
= 1.8V, RHP= 32Ω, R
LINE
= 10kΩ, C1 = 4.7µF, C2 = 4.7µF, C
REF
= C
MBIAS
= C
PREG
=
C
NREG
= 1µF, A
V
PRE
= +20dB, C
MICBIAS
= 1µF, A
VMIGPGA
= 0dB, f
MCLK
= 11.2896MHz, DRATE = 00, TA= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
Total Harmonic Distortion Plus
Noise
MIC Power-Supply Rejection
Ratio
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
THD+N
PSRR
A
VPRE
V
IN
A
VPRE
V
IN
A
VPRE
V
IN
V
AVDD
V
RIPPLE
V
RIPPLE
= 0dB, A
= 500mV
VMICPGA
, f = 1kHz, A-weighted
P-P
= +20dB, A
= 50mV
, f = 1kHz, A-weighted
P-P
= +30dB, A
= 18mV
, f = 1kHz, A-weighted
P-P
=1.71V to 3.6V, TA = +25°C 79 80
= 100mV at 1kHz, input referred 80
= 100mV at 10kHz, input referred 50
= 0dB,
VMICPGA
VMICPGA
= 0dB,
= 0dB,
0.04
0.08
0.08
MICROPHONE BIAS
V
= 1.8V (MBSEL = 0 register setting) 1.4 1.5 1.6
MICBIAS Output Voltage V
MICBIAS
MICBIAS Load Regulation I
AVDD
V
= 3.0V (MBSEL = 1 register setting) 2.3 2.4 2.5
AVDD
= 0 to 2mA 0.8 10 Ω
MICBIAS
MICBIAS Capacitive Load Minimum capacitive load 1 µF
MICBIAS Short-Circuit Current To GND 14 mA
V
= 1.71V to 3.6V, MBSEL = 0,
MICBIAS Power-Supply Rejection
Ratio
MICBIAS Noise Voltage
PSRR
V
NOISEMIC
BIAS
AVDD
= +25°C
T
A
V
= 100mV at 1kHz 86
RIPPLE
= 100mV at 10kHz 76
V
RIPPLE
MBSET = 0 or 1
f = 10Hz to 20kHz 3 µV
f = 1kHz 20 nV/√Hz
75 86
AUTOMATIC GAIN CONTROL
Threshold Level Set by AGCSTH[3:0] -3 -18 dB
Attack Time Set by AGCATK[1:0] 3 200 ms
Release Time Set by AGCRLS[2:0] 0.078 10.000 s
Hold Time Set by AGCHLD[1:0] 50 400 ms
A
= +30dB 30 to 50
VPRE
A
= +20dB 20 to 40Gain Adjustment Range
VPRE
= 0dB 0 to 20
A
VPRE
ADC LOW-LEVEL QUIETING
Full 12dB quieting at 1dB of
attenuation/(gain) for every 2dB
NG Attack and Release Time
decrease/(increase) of signal level
0.5 s
(immediate release if PGA < 20dB gain
when AGC is enabled)
ANTH[3:0] setting range (AGC off) (AGC on
NG Threshold Level
adjusts these values by 20dB since lowlevel signals cause maximum AGC gain in
-64 -28 dB
the PGA)
NG Attenuation
1dB of attenuation for every 2dB signal
amplitude decrease from NG threshold
012dB
%
dB
V
dB
RMS
dB
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
8 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
CPV
DD
= V
DV
DDS2
= V
DV
DD
= 1.8V, RHP= 32Ω, R
LINE
= 10kΩ, C1 = 4.7µF, C2 = 4.7µF, C
REF
= C
MBIAS
= C
PREG
=
C
NREG
= 1µF, A
V
PRE
= +20dB, C
MICBIAS
= 1µF, A
VMIGPGA
= 0dB, f
MCLK
= 11.2896MHz, DRATE = 00, TA= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
LINEIN1/LINEIN2 INPUTS
Line Input Full-Scale Input
Voltage
0dBFS 2 V
P-P
Input DC Bias Voltage 0V
Line Input Resistance R
Crosstalk
Line Channel-to-Channel Gain
Matching
AV
MATCH
PGA = 0dB (Note 9) 12 21 kΩ
IN
LINEIN1 to LINEIN2 or LINEIN2 to
LINEIN1, f = 1kHz
97 dB
±2 %
PGA Gain Range -32 +30 dB
PGA Gain Step Size -32dB to +30dB 2 dB
AUXIN INPUT
AUXIN Full-Scale Input Voltage 0dBFS AUXDC = 0 2 V
P-P
Input DC Voltage Range AUXDC = 1 0 1 V
Input DC Bias Voltage AUXDC = 0 0 V
AUXIN Input Resistance R
Line Channel-to-Channel Gain
Matching
AV
MATCH
AUXDC = 0 12 21 kΩ
IN
AUXDC = 1 100 MΩ
±2 %
PGA Gain Range -32 +30 dB
PGA Gain Step Size -32dB to +30dB 2 dB
JACK SENSE OPERATION (EN[2:0] = 000)
JACKSNS High Threshold
(JKMIC)
JACKSNS Deglitch Period
(JKMIC)
V
TH1
t
GLITCH
TA = +25°C
Pulses shorter than t
are eliminated 12 ms
GLITCH
JACKSNS Voltage (JKMIC) JDETEN = 1 V
0.92 x
V
MICBIAS
0.95 x
V
MICBIAS
AV DD
0.98 x
V
MICBIAS
V
V
HEADSET IMPEDANCE DETECT MODE (EN[2:0] = 111)
JACKSNS/HPL/HPR High
Threshold
V
TH2
HPL/HPR disabled 0.32 0.40 0.48 V
(JSDET/ HSDETL/HSDETR)
JACKSNS/HPL/HPR Low
Threshold
V
TH3
HPL/HPR disabled 0.075 0.100 0.125 V
(JSDET/HSDETL/HSDETR)
JACKSNS/HPL/HPR Sense
Current
I
SNS
HPL/HPR disabled 1.7 2.0 2.3 mA
(JSDET/HSDETL/HSDETR)
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
_______________________________________________________________________________________ 9
DIGITAL INTERFACE ELECTRICAL CHARACTERISTICS
(V
DVDD
= V
DVDDS2
= 1.8V, TA= T
MIN
to T
MAX
, unless otherwise noted.) (Note 1)
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
CPV
DD
= V
DV
DDS2
= V
DV
DD
= 1.8V, RHP= 32Ω, R
LINE
= 10kΩ, C1 = 4.7µF, C2 = 4.7µF, C
REF
= C
MBIAS
= C
PREG
=
C
NREG
= 1µF, A
V
PRE
= +20dB, C
MICBIAS
= 1µF, A
VMICPGA
= 0dB, MCLK = 11.2896MHz, DRATE = 00, TA= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SLEEP MODE (JDETEN = 1, SHDNB = 0)
JACKSNS/HPL Resistance R
JACKSNS/HPL Sense Voltage V
JACKSNS/HPL Sleep Threshold
(JKSNS/LSNS)
V
TH4
MICBIAS = GND 400 1000 kΩ
PU
PU
V
AVDD
0.8V
V
AVDD
-
V
-
AVDD
0.4V
V
AVDD
0.15V
V
V
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MCLK INPUT CHARACTERISTICS
Input Voltage High V
Input Voltage Low V
Input Leakage Current IIH, I
IH
IL
IL
0.7 x V
DVDD
0.4 V
-10 +10 µA
V
Input Capacitance 3pF
MCLK Input Frequency 10 60 MHz
MCLK Duty Cycle 40 50 60 %
Maximum MCLK Input Jitter For guaranteed performance limits 100 ps
RMS
DIGITAL INPUTS (BCLK, LRCLK_A, LRCLK_D, SDIN, SDA, SCL)
Input Voltage High V
Input Voltage Low V
IH
IL
0.7 x V
DVDD
0.3 x V
DVDD
V
V
Input Hysteresis 200 mV
Input Leakage Current IIH, I
IL
-10 +10 µA
Input Capacitance 10 pF
CMOS DIGITAL OUTPUTS (BCLK, LRCLK_A, LRCLK_D, SDOUT)
Output Low Voltage V
Output High Voltage V
OL
OH
IOL = 3mA 0.4 V
IOH = 3mA V
- 0.4 V
DVDD
OPEN-DRAIN DIGITAL OUTPUTS (IRQ, SDA)
Output High Current I
Output Low Voltage V
OH
OL
V
OUT
= V
DVDD
1µA
IOL = 3mA 0.4 V
DIGITAL AUDIO INTERFACE TIMING CHARACTERISTICS
BCLK Cycle Time
BCLK High Time t
BCLK Low Time t
BCLK or LRCLK_A/D Rise and
Fall Time
t
BCLKS
t
BCLKM
BCLKH
BCLKL
t
r , tf
Slave operation 75 ns
Master operation 100 325 ns
Slave operation 30 ns
Master operation 30 ns
Master operation, CL = 15pF 7 ns
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
10 ______________________________________________________________________________________
Note 1: All devices are 100% production tested at room temperature. All temperature limits are guaranteed by design.
Note 2: Supply current measurements taken with no applied input signal to line and microphone inputs. A digital zero audio signal
used for all digital serial audio inputs. Speaker and headphone outputs are loaded as stated in the global conditions.
Note 3: DAC performance measured at headphone outputs.
Note 4: Dynamic range measured using the EIAJ method. The input is applied at -60dBFS, f
IN
= 1kHz. The is THD+N referred to
0dBFS.
Note 5: Signal-to-noise ratio measured using an all-zeros input signal, and is relative to 0dB full scale. The DAC is not muted for the
SNR measurement.
Note 6: Performance measured from line inputs (unless otherwise noted).
Note 7: Microphone amplifiers connected to ADC, microphone inputs AC-grounded.
Note 8: In master-mode operation, the accuracy of the MCLK input proportionally determines the accuracy of the sample clock
rate. (V
DVDD
= 1.8V, unless otherwise noted).
Note 9: To enable the line input, make sure the desired input is selected by either the audio output mixer or the ADC input mixer.
Note 10: C
B
is in pF.
DIGITAL INTERFACE ELECTRICAL CHARACTERISTICS (continued)
(V
DVDD
= V
DVDDS2
= 1.8V, TA= T
MIN
to T
MAX
, unless otherwise noted.) (Note 1)
SDIN or LRCLK_A/D to BCLK
Rising Setup Time
SDIN or LRCLK_A/D to BCLK
Rising Hold Time
SDOUT Delay Time t
I2C INTERFACE TIMING CHARACTERISTICS
Serial-Clock Frequency f
Bus Free Time Between STOP
and START Conditions
Hold Time (Repeated) START
Condition
SCL Pulse Width Low t
SCL Pulse Width High t
Setup Time for a Repeated
START Condition
Data Hold Time t
Data Setup Time t
SDA and SCL Receiving Rise
Time
SDA and SCL Receiving Fall
Time
SDA Transmitting Fall Time t
Setup Time for STOP Condition t
Bus Capacitance C
Pulse Width of Suppressed Spike t
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
t
SU
t
HD
DLY
SCL
t
BUF
t
HD,STA
LOW
HIGH
t
SU,STA
HD,DAT
SU,DAT
t
r
t
f
f
SU,STO
b
SP
BCI = 0 (see the I2C Register Address Map
and Definitions section)
BCI = 0 (see the I2C Register Address Map
and Definitions section)
BCI = 0 (see the I2C Register Address Map
and Definitions section), C
(Note 10) 20 + 0.1C
(Note 10) 20 + 0.1C
V
= 1.8V (Note 10) 20 + 0.1C
DVDD
V
= 3.6V (Note 10) 20 + 0.05C
DVDD
TA = +25°C 0 50 ns
= 30pF
L
30 ns
5ns
050ns
0 400 kHz
1.3 µs
0.6 µs
1.3 µs
0.6 µs
0.6 µs
0 900 ns
100 ns
B
B
B
B
0.6 µs
300 ns
300 ns
250
250
400 pF
ns
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
______________________________________________________________________________________ 11
3
Typical Operating Characteristics
(V
AVDD
= V
CPVDD
= V
DVDDS2
= V
DVDD
= 1.8V, RHP= 32Ω, R
LINE
= 10kΩ, C1 = 4.7µF, C2 = 4.7µF, C
REF
= C
MBIAS
= C
PREG
= C
NREG
=1µF, V
AVPRE
= +20dB, C
MICBIAS
= 1µF, V
AV
MICPGA
= 0dB, f
MCLK
= 12.288MHz, DRATE = 10, TA= +25°C, unless otherwise noted.)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (DAC TO HP)
100
HP GAIN = +5.5dB
= 32
R
Ω
L
10
1
THD+N (%)
0.1
0.01
0.001
1kHz
040
OUTPUT POWER (mW)
20kHz
TOTAL HARMONIC DISTORTION + NOISE
vs. FREQUENCY (DAC TO HP)
10
HP GAIN = +5.5dB
= 16
R
Ω
L
1
10kHz
MAX9856 toc01
3530252015105
MAX9856 toc04
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (DAC TO HP)
100
HP GAIN = +5.5dB
= 16
R
L
10
1
THD+N (%)
0.1
0.01
0.001
060
TOTAL HARMONIC DISTORTION + NOISE
vs. FREQUENCY (DAC TO LINE OUT)
10
V
= 2V
OUT
RL = 10k
1
Ω
1kHz
OUTPUT POWER (mW)
P-P
Ω
20Hz
10kHz
5040302010
MAX9856 toc02
MAX9856 toc05
TOTAL HARMONIC DISTORTION + NOISE
vs. FREQUENCY (DAC TO HP)
10
HP GAIN = +5.5dB
= 32
R
Ω
L
1
0.1
THD+N (%)
0.001
5mW
0.01
20mW
10E+0 100E+
FREQUENCY (Hz)
10E+31E+3100E+0
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (LINE IN TO ADC)
10
1
MAX9856 toc03
MAX9856 toc06
0.1
THD+N (%)
0.01
0.001
5mW
20mW
10E+0 100E+3
FREQUENCY (Hz)
10E+31E+3100E+0
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (INTMIC TO ADC)
10
ADC
= -3dBFS
OUT
MIC PREAMP = +20dB
MIC GAIN = 0dB
1
0.1
THD+N (%)
0.01
0.001
10 100k
FREQUENCY (Hz)
10k1k100
MAX9856 toc07
0.1
THD+N (%)
0.01
0.001
10E+0 100E+3
FREQUENCY (Hz)
10E+31E+3100E+0
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (INTMIC TO ADC)
10
ADC
= -3dBFS
OUT
MIC PREAMP = +30dB
MIC GAIN = 0dB
1
0.1
THD+N (%)
0.01
0.001
10 100k
FREQUENCY (Hz)
10k1k100
MAX9856 toc08
0.1
THD+N (%)
0.01
0.001
10 100k
FREQUENCY (Hz)
POWER OUT
vs. HEADPHONE LOAD
100
THD+N = 10%
10
POWER OUT (mW)
1
THD+N = 1%
10010
HEADPHONE LOAD (Ω)
10k1k100
fIN = 1kHz
MAX9856 toc09
10001
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
12 ______________________________________________________________________________________
)
)
)
)
)
Typical Operating Characteristics (continued)
(V
AVDD
= V
CPVDD
= V
DVDDS2
= V
DVDD
= 1.8V, RHP= 32Ω, R
LINE
= 10kΩ, C1 = 4.7µF, C2 = 4.7µF, C
REF
= C
MBIAS
= C
PREG
= C
NREG
=1µF, V
AVPRE
= +20dB, C
MICBIAS
= 1µF, V
AV
MICPGA
= 0dB, f
MCLK
= 12.288MHz, DRATE = 10, TA= +25°C, unless otherwise noted.)
-20
0
V
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (DAC TO HP)
= 100mV
RIPPLE
P-P
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (DAC TO LINE OUT)
0
V
RIPPLE
-20
MAX9856 toc10
= 100mV
P-P
-40
-60
PSRR (dB)
-80
-100
-120
10 100k
FREQUENCY (Hz)
FFT, DAC TO LINE OUT, 48kHz
SYNCHRONOUS SLAVE MODE, -60dBFS
20
0
-20
-40
-60
-80
AMPLITUDE (dBFS)
-100
-120
-140
000E+0 4E+3
6E+3
MCLK = 12.288MHz
LRCLK = 48kHz
PCLK/2
8E+3
12E+3
10E+32E+3
FREQUENCY (Hz
14E+3
FFT, DAC TO LINE OUT, 48kHz
ASYNCHRONOUS SLAVE MODE, 0dBFS
20
0
-20
-40
-60
-80
AMPLITUDE (dBFS)
-100
-120
-140
000E+0 4E+3
6E+3
MCLK = 11.2896MHz
LRCLK = 48kHz
PCLK/2
8E+3
12E+3
10E+32E+3
FREQUENCY (Hz
14E+3
10k1k100
16E+3
16E+3
18E+3
18E+3
20E+3
20E+3
PSRR (dB)
MAX9856 toc13
AMPLITUDE (dBFS)
MAX9856 toc16
AMPLITUDE (dBFS)
-40
-60
-80
-100
-120
10 100k
FREQUENCY (Hz)
10k1k100
FFT, DAC TO LINE OUT, 48kHz
ASYNCHRONOUS MASTER MODE, 0dBFS
20
0
-20
-40
-60
-80
-100
-120
-140
000E+0 4E+3
6E+3
FREQUENCY (Hz
8E+3
10E+32E+3
MCLK = 11.2896MHz
LRCLK = 48kHz
PCLK/2
12E+3
14E+3
FFT, DAC TO LINE OUT, 48kHz
ASYNCHRONOUS SLAVE MODE, -60dBFS
20
0
-20
-40
-60
-80
-100
-120
-140
000E+0 4E+3
6E+3
8E+3
10E+32E+3
MCLK = 11.2896MHz
LRCLK = 48kHz
PCLK/2
12E+3
14E+3
16E+3
16E+3
18E+3
18E+3
20E+3
20E+3
MAX9856 toc11
AMPLITUDE (dBFS)
MAX9856 toc14
AMPLITUDE (dBFS)
MAX9856 toc17
AMPLITUDE (dBFS)
FFT, DAC TO LINE OUT, 48kHz
SYNCHRONOUS SLAVE MODE, 0dBFS
20
0
-20
-40
-60
-80
-100
-120
-140
000E+0 4E+3
6E+3
FREQUENCY (Hz
8E+3
10E+32E+3
MCLK = 12.288MHz
LRCLK = 48kHz
PCLK/2
12E+3
16E+3
14E+3
FFT, DAC TO LINE OUT, 48kHz
ASYNCHRONOUS MASTER MODE, -60dBFS
20
0
-20
-40
-60
-80
-100
-120
-140
000E+0 4E+3
6E+3
MCLK = 11.2896MHz
LRCLK = 48kHz
PCLK/2
8E+3
12E+3
10E+32E+3
FREQUENCY (Hz
14E+3
16E+3
FFT, LINE IN TO ADC (48kHz)
SYNCHRONOUS MASTER MODE (0dBFS)
20
0
-20
-40
-60
-80
-100
-120
-140
0 20k
MCLK = 12.288MHz
LRCLK = 48kHz
PCLK/2
FREQUENCY (Hz)
15k10k5k
18E+3
18E+3
MAX9856 toc12
20E+3
MAX9856 toc15
20E+3
MAX9856 toc18
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
______________________________________________________________________________________ 13
Typical Operating Characteristics (continued)
(V
AVDD
= V
CPVDD
= V
DVDDS2
= V
DVDD
= 1.8V, RHP= 32Ω, R
LINE
= 10kΩ, C1 = 4.7µF, C2 = 4.7µF, C
REF
= C
MBIAS
= C
PREG
= C
NREG
=1µF, V
AVPRE
= +20dB, C
MICBIAS
= 1µF, V
AV
MICPGA
= 0dB, f
MCLK
= 12.288MHz, DRATE = 10, TA= +25°C, unless otherwise noted.)
FFT, LINE IN TO ADC (48kHz)
SYNCHRONOUS MASTER MODE (-60dBFS)
20
0
-20
-40
-60
-80
AMPLITUDE (dBFS)
-100
-120
-140
0 20k
FREQUENCY (Hz)
FFT, LINE IN TO ADC (48kHz)
ASYNCHRONOUS SLAVE MODE (0dBFS)
20
0
-20
-40
-60
-80
AMPLITUDE (dBFS)
-100
-120
-140
0 20k
FREQUENCY (Hz)
MCLK = 12.288MHz
LRCLK = 48kHz
PCLK/2
15k10k5k
MCLK = 11.2896MHz
LRCLK = 48kHz
PCLK/2
15k10k5k
ASYNCHRONOUS MASTER MODE (0dBFS)
20
MAX9856 toc19
MAX9856 toc22
0
-20
-40
-60
-80
AMPLITUDE (dBFS)
-100
-120
-140
0 20k
ASYNCHRONOUS SLAVE MODE (-60dBFS)
20
0
-20
-40
-60
-80
AMPLITUDE (dBFS)
-100
-120
-140
0 20k
FFT, LINE IN TO ADC (48kHz)
MCLK = 11.2896MHz
LRCLK = 48kHz
PCLK/2
15k10k5k
FREQUENCY (Hz)
FFT, LINE IN TO ADC (48kHz)
MCLK = 11.2896MHz
LRCLK = 48kHz
PCLK/2
15k10k5k
FREQUENCY (Hz)
MAX9856 toc20
AMPLITUDE (dBFS)
-100
-120
-140
-10
MAX9856 toc23
-30
-50
-70
-90
AMPLITUDE (dBFS)
-110
-130
-150
FFT, LINE IN TO ADC (48kHz)
ASYNCHRONOUS MASTER MODE (-60dBFS)
20
0
-20
-40
-60
-80
0 20k
MCLK = 11.2896MHz
LRCLK = 48kHz
PCLK/2
FREQUENCY (Hz)
15k10k5k
WIDEBAND FFT, DAC TO HP AMP, 48kHz
SYNCHRONOUS MASTER MODE, 0dBFS
10
10
FREQUENCY (Hz)
C1 = 4.7μF
1M100k100 1k 10k
MAX9856 toc21
MAX9856 toc24
10M
WIDEBAND FFT, DAC TO HP AMP, 48kHz
SYNCHRONOUS MASTER MODE, -60dBFS
10
-10
-30
-50
-70
-90
AMPLITUDE (dBFS)
-110
-130
-150
10
FREQUENCY (Hz)
C1 = 4.7μF
1M100k100 1k 10k
MAX9856 toc25
10M
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
20
STEREO DAC PLAYBACK MODE (48kHz)
18
SUPPLY CURRENT = I
16
14
12
10
8
6
SUPPLY CURRENT (mA)
4
2
0
1.0 4.0
SUPPLY VOLTAGE (V)
VDD
+ I
DVDDS2
DAC DIGITAL FILTER FREQUENCY RESPONSE
3
MAX9856 toc26
3.53.02.52.01.5
2
1
0
-1
-2
-3
-4
OUTPUT AMPLITUDE (dB)
-5
-6
-7
0 25k
FREQUENCY (Hz)
MAX9856 toc27
20k15k10k5k
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
14 ______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V
AVDD
= V
CPVDD
= V
DVDDS2
= V
DVDD
= 1.8V, RHP= 32Ω, R
LINE
= 10kΩ, C1 = 4.7µF, C2 = 4.7µF, C
REF
= C
MBIAS
= C
PREG
= C
NREG
=1µF, V
AVPRE
= +20dB, C
MICBIAS
= 1µF, V
AV
MICPGA
= 0dB, f
MCLK
= 12.288MHz, DRATE = 10, TA= +25°C, unless otherwise noted.)
ADC DIGITAL FILTER FREQUENCY RESPONSE
3
2
1
0
-1
-2
-3
-4
OUTPUT AMPLITUDE (dB)
-5
-6
-7
0 25k
FREQUENCY (Hz)
AUTOMATIC GAIN CONTROL THRESHOLDS
10
0
-10
-20
-30
-40
ADC OUTPUT (dBFS)
-50
-60
-70
-100 20
MICROPHONE INPUT (dBV)
CLICK-POP
SCL
1V/div
MAX9856 toc28
SDA
1V/div
HPL
5mV/div
20k15k10k5k
TIME (200ms/div)
MAX9856 toc29
0V
0V
0V
SCL
1V/div
SDA
1V/div
LINEOUTL
1V/div
TOTAL HARMONIC DISTORTION + NOISE
vs. MCLK FREQUENCY, 0dBFS
1
DAC PLAYBACK MODE (48kHz)
MAX9856 toc31
0.1
THD+N (%)
0-20-80 -60 -40
0.01
12 14 16 18
10 2011 13 15 17 19
FREQUENCY (MHz)
MAX9856 toc32
100
98
96
94
92
90
88
DYNAMIC RANGE (dB)
86
84
82
80
10 20
DAC SOFT-START
TIME (4ms/div)
MAX9856 toc30
DYNAMIC RANGE
vs. MCLK FREQUENCY (-60dBFS)
DAC PLAYBACK MODE (48kHz)
161412
FREQUENCY (MHz)
0V
0V
0V
MAX9856 toc33
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