19-2932; Rev 0; 8/03
Audio Click-Pop Suppressor
General Description
The MAX9890 provides click-and-pop suppression for
devices such as CODECs with integrated headphone
amplifiers that lack a clickless/popless startup/power-
up or shutdown/power-down. The device controls the
ramping of the DC bias voltage on the output-coupling
capacitors and the application of the audio signal to
ensure that no audible transients are present at the
headphones. The MAX9890A features a 200ms startup
time for use with up to 100µF coupling capacitors. The
MAX9890B features a 330ms startup time for use with
greater than 100µF coupling capacitors.
The MAX9890 consumes 14µA of supply current and
0.001µA in shutdown, while contributing less than
0.003% THD+N into a 32Ω load. ESD (Human Body
Model) protection circuitry on the outputs protect the
MAX9890 and devices further up the signal chain from
ESD strikes up to ±8kV.
The MAX9890 is available in a miniature (1.5mm
✕
1.5mm
✕
0.6mm) 9-bump chip-scale package (UCSP™),
as well as an 8-pin TDFN package (3mm
✕
3mm
✕
0.8mm), and is specified for operation over the
-40°C to +85°C extended temperature range.
o
36dB Click-Pop Suppression
o
2.7V to 5.5V Single-Supply Operation
o
Clickless/Popless Startup/Power-Up and
Shutdown/Power-Down
o
0.001µA Low-Power Shutdown Mode
o
THD+N < 0.003% Into 32Ω
o
±8kV ESD Protection (Human Body Model)
o
Requires Only One 0.1µF Capacitor to Complete
the Circuit
o
Low 14µA Supply Current
o
Tiny Packaging
9-Bump UCSP (1.5mm x 1.5mm x 0.6mm)
8-Pin TDFN (3mm x 3mm x 0.8mm)
Features
MAX9890
Ordering Information
PART
MAX9890AEBL-T*
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
ADV
AHA
ADW
AHB
-40°C to +85°C 9 UCSP-9
-40°C to +85°C 8 TDFN-EP**
-40°C to +85°C 9 UCSP-9
-40°C to +85°C 8 TDFN-EP**
Applications
High-End Notebook Audio
Portable DVD Players
Portable MP3 Players
PDAs
Cell Phones
MAX9890AETA
MAX9890BEBL-T*
MAX9890BETA
*Future
product—contact factory for availability.
**EP
= Exposed pad.
Simplified Block Diagram
SINGLE SUPPLY
2.7V TO 5.5V
Selector Guide
PART
MAX9890AEBL-T
PIN-PACKAGE
9 UCSP-9
8 TDFN-EP
9 UCSP-9
8 TDFN-EP
SWITCH TURN-ON
TIME (ms)
200
200
330
330
INL
OUTL
MAX9890AETA
MAX9890BEBL-T
MAX9890BETA
RAMP
UP
RAMP
DOWN
INR
OUTR
MAX9890
Typical Application Circuit and Pin Configurations appear
at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Audio Click-Pop Suppressor
MAX9890
ABSOLUTE MAXIMUM RATINGS
(All Voltages are Referenced to GND)
V
CC
........................................................................................+6V
CEXT,
SHDN,
OUT_ .................................................-0.3V to +6V
IN_ ..............................................................-0.3V to (V
CC
+ 0.3V)
Continuous Current (IN_, OUT_).....................................±150mA
Continuous Current (All Other Pins) .................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin TDFN (derate 24.4mW/°C above +70°C) ..........1951mW
9-Bump UCSP (derate 4.7mW/°C above +70°C)..........379mW
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
Bump Temperature (soldering)
Reflow ...........................................................................+235°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.
ELECTRICAL CHARACTERISTICS
(V
CC
= 3V,
SHDN
= V
CC
, GND = 0, C
CEXT
= 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
(Note 1)
PARAMETER
Supply Voltage Range
Supply Current
Shutdown Supply Current
Input Voltage Range
On-Resistance
On-Resistance Flatness
Output Discharge Resistance
Input Off-Leakage Current
V
CC
Power-Down Threshold
(Note 3)
Click-Pop Reduction
ESD Protection
DYNAMIC
Turn-On Time (Note 4)
Turn-Off Time
Bandwidth
Total Harmonic Distortion Plus
Noise
Off-Isolation, IN_ to OUT_
Crosstalk (Switches ON)
THD+N
R
L
= 32Ω, 30mW, f = 1kHz
f = 20kHz,
SHDN
= GND, R
L
= 32Ω
f = 20kHz
V
RIPPLE
= 0.5V
P-P
at 20Hz, f
IN
= 3kHz at
1V
P-P
, R
L
= 32Ω
Power-Supply Rejection Ratio
(Note 6)
PSRR
V
RIPPLE
= 0.5V
P-P
at 1kHz, f
IN
= 3kHz at
1V
P-P
, R
L
= 32Ω
V
RIPPLE
= 0.5V
P-P
at 20kHz, f
IN
= 3kHz
at 1V
P-P
, R
L
= 32Ω
t
ON
t
OFF
MAX9890A
MAX9890B
(Note 5)
200
330
120
>100
0.003
-108
-100
-100
-100
-84
dB
ms
ns
kHz
%
dB
dB
OUT_, Human Body Model
V
UVLO
R
ON
R
FLAT(ON)
R
OUT(DIS)
SHDN
= GND
V
CC
falling
SYMBOL
V
CC
I
CC
I
SHDN
(Note 2)
SHDN
= GND
Inferred from R
ON
test
Over input voltage
range
V
CC
= 5.5V
V
CC
= 2.7V
0
0.4
0.7
2
220
0.001
2.5
36
±8
1
CONDITIONS
Inferred from R
ON
test
MIN
2.7
14
0.001
TYP
MAX
5.5
22
1
V
CC
1
1.5
UNITS
V
µA
µA
V
Ω
mΩ
kΩ
µA
V
dB
kV
Over input voltage range
2
_______________________________________________________________________________________
Audio Click-Pop Suppressor
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 3V,
SHDN
= V
CC
, GND = 0, C
CEXT
= 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
(Note 1)
PARAMETER
LOGIC INPUT (SHDN)
Logic-Input High Voltage
Logic-Input Low Voltage
Logic-Input Current
V
IH
V
IL
I
IN
V
CC
= 2.7V to 5.5V
V
CC
= 2.7V to 5.5V
2.0
0.8
±1
V
V
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX9890
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
All devices are 100% tested at T
A
= +25°C. All temperature limits are guaranteed by design.
Supply current is measured when switch is on (i.e.,
SHDN
= V
CC
, t > t
ON
).
Supply voltage level where the device enters its power-down cycle.
Turn-on time is measured from the time V
CC
= 3V and
SHDN
> V
IH
until the R
ON
specification is met.
Switch turn-off time is measured from the time
SHDN
< V
IL
or V
CC
< V
UVLO
until the off-isolation specification is met.
See the
Power-Supply Rejection Ratio
section for test method.
Typical Operating Characteristics
(V
CC
= 3V, C
CEXT
= 0.1µF, typical values are at T
A
= +25°C, unless otherwise noted.)
ON-RESISTANCE vs. IN_ VOLTAGE
MAX9890 toc01
SUPPLY CURRENT vs. TEMPERATURE
MAX9890 toc02
SHUTDOWN CURRENT vs. TEMPERATURE
900
SHUTDOWN CURRENT (pA)
800
700
600
500
400
300
200
100
0
V
CC
= 5.5V
V
CC
= 2.7V
SHDN = 0V
MAX9890 toc03
0.8
0.7
ON-RESISTANCE (Ω)
0.6
0.5
0.4
V
CC
= 5V
0.3
0.2
0
1
2
3
4
5
IN_ VOLTAGE (V)
V
CC
= 3V
40
35
SUPPLY CURRENT (µA)
30
25
20
15
10
5
0
-40
-15
10
35
60
V
CC
= 2.7V
V
CC
= 5.5V
1000
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
3
Audio Click-Pop Suppressor
MAX9890
Typical Operating Characteristics (continued)
(V
CC
= 3V, C
CEXT
= 0.1µF, typical values are at T
A
= +25°C, unless otherwise noted.)
ON-LOSS vs. FREQUENCY
MAX9890 toc04
PHASE SHIFT vs. FREQUENCY
MAX9890 toc05
OFF-ISOLATION vs. FREQUENCY
-10
OFF-ISOLATION (dB)
-30
-50
-70
-90
-110
-130
-150
R
L
= 16Ω
10
100
1k
FREQUENCY (Hz)
10k
100k
R
L
= 32Ω
MAX9890 toc06
1.0
0.8
0.6
0.4
ON-LOSS (dB)
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
10
100
1k
FREQUENCY (Hz)
10k
R
L
= 16Ω
R
L
= 32Ω
2
1
PHASE SHIFT (DEGREES)
0
-1
-2
-3
-4
-5
R
L
= 16Ω
R
L
= 32Ω
10
100k
10
100
1k
FREQUENCY (Hz)
10k
100k
CROSSTALK vs. FREQUENCY
MAX9890 toc07
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9890 toc08
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
V
CC
= 5V
R
L
= 32Ω
f = 1kHz
MAX9890 toc09
-50
-60
-70
CROSSTALK (dB)
-80
100
V
CC
= 5V
R
L
= 16Ω
f = 1kHz
100
10
10
THD+N (%)
-90
-100
-110
-120
-130
-140
-150
10
100
1k
FREQUENCY (Hz)
10k
100k
1
THD+N (%)
0
25 50 75 100 125 150 175 200 225 250
OUTPUT POWER (mW)
1
0.1
0.1
0.01
0.01
0.001
0.001
0
20
40
60
80
100
120
OUTPUT POWER (mW)
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9890 toc10
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9890 toc11
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
V
CC
= 5V
R
L
= 16Ω
0.1
THD+N (%)
MAX9890 toc12
100
V
CC
= 3V
R
L
= 16Ω
f = 1kHz
100
V
CC
= 3V
R
L
= 32Ω
f = 1kHz
1
10
10
THD+N (%)
THD+N (%)
1
1
0.01
OUTPUT POWER = 25mW
0.1
0.1
0.01
0.01
0.001
OUTPUT POWER = 150mW
0.001
0
25 50
75 100 125 150 175 200 225
OUTPUT POWER (mW)
0.001
0
20
40
60
80
100
120
OUTPUT POWER (mW)
0.0001
10
100
1k
FREQUENCY (Hz)
10k
100k
4
_______________________________________________________________________________________
Audio Click-Pop Suppressor
Typical Operating Characteristics (continued)
(V
CC
= 3V, C
CEXT
= 0.1µF, typical values are at T
A
= +25°C, unless otherwise noted.)
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9890 toc13
MAX9890
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9890 toc14
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
V
CC
= 3V
R
L
= 32Ω
0.1
MAX9890 toc15
1
V
CC
= 5V
R
L
= 32Ω
0.1
THD+N (%)
1
V
CC
= 3V
R
L
= 16Ω
0.1
THD+N (%)
OUTPUT POWER = 100mW
0.01
1
THD+N (%)
0.01
OUTPUT POWER = 20mW
0.01
OUTPUT POWER = 60mW
0.001
OUTPUT POWER = 80mW
0.0001
10
100
1k
FREQUENCY (Hz)
10k
100k
0.001
OUTPUT POWER = 25mW
0.001
OUTPUT POWER = 20mW
0.0001
10
100
1k
FREQUENCY (Hz)
10k
100k
0.0001
10
100
1k
FREQUENCY (Hz)
10k
100k
STARTUP WAVEFORM (DC)
MAX9890 toc16
SHUTDOWN WAVEFORM (DC)
MAX9890 toc17
SHDN
2V/div
SHDN
2V/div
V
OUT
1V/div
V
OUT
1V/div
V
HEADPHONE
10mV/div
40ms/div
10s/div
V
HEADPHONE
10mV/div
STARTUP WAVEFORM (AC)
MAX9890 toc18
SHUTDOWN WAVEFORM (AC)
MAX9890 toc19
SHDN
2V/div
SHDN
2V/div
V
OUT
1V/div
V
OUT
1V/div
V
HEADPHONE
1V/div
V
HEADPHONE
1V/div
40ms/div
1s/div
_______________________________________________________________________________________
5
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