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.
Applications
High-End Notebook Audio PDAs
Portable DVD Players Cell Phones
Portable MP3 Players
Features
♦ 36dB Click-Pop Suppression
♦ 2.7V to 5.5V Single-Supply Operation
♦ Clickless/Popless Startup/Power-Up and
Shutdown/Power-Down
♦ 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
the Circuit
♦ Low 14µA Supply Current
♦ Tiny Packaging
9-Bump UCSP (1.5mm x 1.5mm x 0.6mm)
8-Pin TDFN (3mm x 3mm x 0.8mm)
MAX9890
Audio Click-Pop Suppressor
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-2932; Rev 2; 5/04
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.
EVALUATION KIT
AVAILABLE