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MAX9890 Datasheet

  • MAX9890

  • 音頻咔嗒聲-怦然聲抑制器

  • 12頁

  • MAXIM   MAXIM

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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 100碌F coupling capacitors. The
MAX9890B features a 330ms startup time for use with
greater than 100碌F coupling capacitors.
The MAX9890 consumes 14碌A(chǔ) of supply current and
0.001碌A(chǔ) in shutdown, while contributing less than
0.003% THD+N into a 32鈩?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 鹵8kV.
The MAX9890 is available in a miniature (1.5mm
鉁?/div>
1.5mm
鉁?/div>
0.6mm) 9-bump chip-scale package (UCSP鈩?,
as well as an 8-pin TDFN package (3mm
鉁?/div>
3mm
鉁?/div>
0.8mm), and is specified for operation over the
-40擄C to +85擄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
0.001碌A(chǔ) Low-Power Shutdown Mode
o
THD+N < 0.003% Into 32鈩?/div>
o
鹵8kV ESD Protection (Human Body Model)
o
Requires Only One 0.1碌F Capacitor to Complete
the Circuit
o
Low 14碌A(chǔ) 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擄C to +85擄C 9 UCSP-9
-40擄C to +85擄C 8 TDFN-EP**
-40擄C to +85擄C 9 UCSP-9
-40擄C to +85擄C 8 TDFN-EP**
Applications
High-End Notebook Audio
Portable DVD Players
Portable MP3 Players
PDAs
Cell Phones
MAX9890AETA
MAX9890BEBL-T*
MAX9890BETA
*Future
product鈥攃ontact 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鈥檚 website at www.maxim-ic.com.

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