Rainbow Electronics MAX9890 - Manual

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 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
♦ 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 Protection (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 0; 8/03
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.
PART TEMP RANGE
PIN-
PACKAGE TOP
MARK
M AX 9890AE BL- T* -40 °C to +85°C 9 UCSP-9 ADV
MAX9890AETA -40 °C to +85°C 8 TDFN-EP** AHA
M AX 9890BE BL- 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.
*Future product—contact factory for availability.
**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.