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 100F coupling capacitors. The
MAX9890B features a 330ms startup time for use with
greater than 100F coupling capacitors.
The MAX9890 consumes 14A of supply current and
0.001A in shutdown, while contributing less than
0.003% THD+N into a 32
Ω 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.
Applications
High-End Notebook Audio
PDAs
Portable DVD Players
Cell Phones
Portable MP3 Players
Features
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 0.001A Low-Power Shutdown Mode
o THD+N < 0.003% Into 32Ω
o ±8kV ESD Protected Outputs (Human Body Model)
o Requires Only One 0.1F Capacitor to Complete
the Circuit
o Low 14A 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)
Audio Click-Pop Suppressor
Ordering Information
19-2932; Rev 2; 5/04
MAX9890
EVALUATION KIT AVAILABLE
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX9890AEBL-T
-40
°C to +85°C 9 UCSP-9
ADV
MAX9890AETA
-40
°C to +85°C 8 TDFN-EP**
AHA
MAX9890BEBL-T
-40
°C to +85°C 9 UCSP-9
ADW
MAX9890BETA
-40
°C to +85°C 8 TDFN-EP**
AHB
Selector Guide
PART
PIN-PACKAGE
SWITCH TURN-ON
TIME (ms)
MAX9890AEBL-T
9 UCSP-9
200
MAX9890AETA
8 TDFN-EP
200
MAX9890BEBL-T
9 UCSP-9
330
MAX9890BETA
8 TDFN-EP
330
UCSP is a trademark of Maxim Integrated Products, Inc.
**
EP = Exposed pad.
Simplified Block Diagram
RAMP
UP
SINGLE SUPPLY
2.7V TO 5.5V
MAX9890
INL
INR
OUTL
OUTR
RAMP
DOWN
Typical Application Circuit and Pin Configurations appear
at end of data sheet.