MAX9890 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Audio Click-Pop Suppressor

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.
High-End Notebook Audio
Portable DVD Players
Portable MP3 Players
Applications
PDAs
Cell Phones
Simplified Block Diagram
SINGLE SUPPLY
2.7V TO 5 5V
INL
OUTL
RAMP
UP
RAMP
DOWN
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 0.001µA 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)
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
MAX9890AEBL-T* -40°C to +85°C 9 UCSP-9
MAX9890AETA -40°C to +85°C 8 TDFN-EP**
MAX9890BEBL-T* -40°C to +85°C 9 UCSP-9
MAX9890BETA -40°C to +85°C 8 TDFN-EP**
*Future product—contact factory for availability.
**EP = Exposed pad.
TOP
MARK
ADV
AHA
ADW
AHB
Selector Guide
PART
MAX9890AEBL-T
MAX9890AETA
MAX9890BEBL-T
MAX9890BETA
PIN-PACKAGE
9 UCSP-9
8 TDFN-EP
9 UCSP-9
8 TDFN-EP
SWITCH TURN-ON
TIME (ms)
200
200
330
330
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.