max9890 Maxim Integrated Products, Inc., max9890 Datasheet

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max9890

Manufacturer Part Number
max9890
Description
Max9890 Audio Click-pop Suppressor
Manufacturer
Maxim Integrated Products, Inc.
Datasheet

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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
as well as an 8-pin TDFN package (3mm
0.8mm), and is specified for operation over the
-40°C to +85°C extended temperature range.
19-2932; Rev 2; 5/04
UCSP is a trademark of Maxim Integrated Products, Inc.
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.
High-End Notebook Audio
Portable DVD Players
Portable MP3 Players
0.6mm) 9-bump chip-scale package (UCSP™),
INR
INL
RAMP
UP
Simplified Block Diagram
SINGLE SUPPLY
________________________________________________________________ Maxim Integrated Products
2.7V TO 5.5V
General Description
MAX9890
DOWN
RAMP
OUTR
OUTL
Applications
PDAs
Cell Phones
3mm
Audio Click-Pop Suppressor
♦ 36dB Click-Pop Suppression
♦ 2.7V to 5.5V Single-Supply Operation
♦ Clickless/Popless Startup/Power-Up and
♦ 0.001µA Low-Power Shutdown Mode
♦ THD+N < 0.003% Into 32Ω
♦ ±8kV ESD Protected Outputs (Human Body Model)
♦ Requires Only One 0.1µF Capacitor to Complete
♦ Low 14µA Supply Current
♦ Tiny Packaging
**EP = Exposed pad.
Typical Application Circuit and Pin Configurations appear
at end of data sheet.
M AX 9890AE BL- T
MAX9890AETA
M AX 9890BE BL- T
MAX9890BETA
MAX9890AEBL-T
MAX9890AETA
MAX9890BEBL-T
MAX9890BETA
Shutdown/Power-Down
the Circuit
9-Bump UCSP (1.5mm x 1.5mm x 0.6mm)
8-Pin TDFN (3mm x 3mm x 0.8mm)
PART
PART
-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**
TEMP RANGE
PIN-PACKAGE
Ordering Information
8 TDFN-EP
8 TDFN-EP
9 UCSP-9
9 UCSP-9
Selector Guide
PIN-
PACKAGE
SWITCH TURN-ON
Features
TIME (ms)
200
200
330
330
MARK
ADW
TOP
AHA
AHB
ADV
1

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max9890 Summary of contents

Page 1

... 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 0.001µ ...

Page 2

... V = 5.5V Over input voltage range V = 2.7V CC Over input voltage range SHDN = GND V falling UVLO CC OUT_, Human Body Model MAX9890A t ON MAX9890B t (Note 5) OFF R = 32Ω, 30mW 1kHz 20kHz, SHDN = GND 32Ω 20kHz V = 0.5V at 20Hz 3kHz at RIPPLE P 32Ω ...

Page 3

ELECTRICAL CHARACTERISTICS (continued) = 3V, SHDN = GND = (Note 1) PARAMETER SYMBOL LOGIC INPUT (SHDN) Logic-Input High Voltage Logic-Input Low Voltage Logic-Input Current Note 1: All devices are 100% tested at T ...

Page 4

Audio Click-Pop Suppressor ( 0.1µF, typical values are CEXT ON-LOSS vs. FREQUENCY 1.0 0.8 0.6 0.4 0 32Ω -0.2 -0 16Ω L -0.6 -0.8 -1.0 10 100 ...

Page 5

... NOISE vs. FREQUENCY 32Ω L 0.1 0.01 OUTPUT POWER = 30mW 0.001 OUTPUT POWER = 15mW 0.0001 100k 10 100 1k 10k FREQUENCY (Hz) SHUTDOWN WAVEFORM (DC) MAX9890 toc17 SHDN 2V/div V OUT 1V/div V HEADPHONE 10mV/div 10s/div SHUTDOWN WAVEFORM (AC) MAX9890 toc19 SHDN 2V/div V OUT 1V/div V HEADPHONE 1V/div 1s/div 100k 5 ...

Page 6

... MAX9890 provides click-pop suppression even if the output blocking capacitors are already partially or fully charged. The MAX9890A features a 200ms switch turn-on time, enabling the use 100µF coupling capacitors at the output for applications requiring only a limited low- frequency response and a rapid turn-on time. The MAX9890B features a 330ms switch turn-on time, enabling the use of > ...

Page 7

... The MAX9890’s internal switches connect the input to the output after the coupling capacitors are fully charged. The MAX9890A holds the switches open for 200ms and is ideal for coupling capacitors less than 100µF. The MAX9890B has a longer turn-on time of 330ms and is _______________________________________________________________________________________ Audio Click-Pop Suppressor V ...

Page 8

... DC P-P supply voltage, and a 20kHz 1V P-P IN_ with a 32Ω load is shown in Figure 6. The MAX9890 maintains a -100dB (typ) PSRR across the supply voltage range eliminating any corruption of the audio signal from supply variations. Therefore, with a zero audio signal, the ...

Page 9

... PC board trace lengths and resistor leads, and place external components as close to the device as possible. Power Supply and Bypassing The excellent PSRR of the MAX9890 allows it to operate from noisy power supplies. In most applications, a 0.1µF capacitor from V to GND is sufficient. This ...

Page 10

... GND C SHDN 2.7V TO 5.5V 1 (C2 CEXT RAMP-UP AND STARTUP AND RAMP-DOWN SHUTDOWN SHDN CONTROL CONTROL INL OUTL INR OUTR MAX9890 GND 5 (A2) Pin Configurations 2 3 GND OUTR MAX9890 INR V CEXT CC UCSP Typical Application Circuit 8 (C3) 0.1µ (A1 (A3 UCSP BUMP. *USER-DEFINED VALUE. ...

Page 11

For the latest package outline information www.maxim-ic.com/packages.) ______________________________________________________________________________________ Audio Click-Pop Suppressor Package Information PACKAGE OUTLINE, 3x3 UCSP 1 21-0093 ...

Page 12

Audio Click-Pop Suppressor (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) PIN 1 INDEX AREA COMMON DIMENSIONS SYMBOL MIN. A 0.70 D 2.90 E 2.90 ...

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