Rainbow Electronics MAX9890 User 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/power­up 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 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.

Selector Guide

UCSP is a trademark of Maxim Integrated Products, Inc.

*Future product—contact factory for availability.
**EP = Exposed pad.

Simplified Block Diagram

Typical Application Circuit and Pin Configurations appear
at end of data sheet.

PART TEMP RANGE

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

PIN­PACKAGE

TOP

MARK

SINGLE SUPPLY

2.7V TO 5.5V

RAMP

DOWN

MAX9890

OUTL

OUTR

INL

RAMP

UP

INR

PART PIN-PACKAGE

MAX9890AEBL-T 9 UCSP-9 200

MAX9890AETA 8 TDFN-EP 200

MAX9890BEBL-T 9 UCSP-9 330

MAX9890BETA 8 TDFN-EP 330

SWITCH TURN-ON

TIME (ms)

MAX9890

Audio Click-Pop Suppressor

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

(All Voltages are Referenced to GND)
V

CC

........................................................................................+6V

CEXT, SHDN, OUT_ .................................................-0.3V to +6V

IN_ ..............................................................-0.3V to (V

CC

+ 0.3V)

Continuous Current (IN_, OUT_).....................................±150mA

Continuous Current (All Other Pins) .................................±20mA

Continuous Power Dissipation (T

A

= +70°C)

8-Pin TDFN (derate 24.4mW/°C above +70°C) ..........1951mW

9-Bump UCSP (derate 4.7mW/°C above +70°C)..........379mW

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Junction Temperature......................................................+150°C

Lead Temperature (soldering, 10s) .................................+300°C

Bump Temperature (soldering)

Reflow ...........................................................................+235°C

ELECTRICAL CHARACTERISTICS

(VCC= 3V, SHDN = VCC, GND = 0, C

CEXT

= 0.1µF, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

(Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage Range V

CC

Inferred from RON test 2.7 5.5 V

Supply Current I

CC

(Note 2) 14 22 µA

Shutdown Supply Current I

SHDN

SHDN = GND

1µA

Input Voltage Range Inferred from RON test 0

V

VCC = 5.5V 0.4 1

On-Resistance R

ON

Over input voltage
range

V

CC

= 2.7V 0.7 1.5

Ω

On-Resistance Flatness

)

Over input voltage range 2 mΩ

Output Discharge Resistance

)

kΩ

Input Off-Leakage Current SHDN = GND

1µA

VCC Power-Down Threshold
(Note 3)

V

UVLO

VCC falling 2.5 V

Click-Pop Reduction 36 dB

ESD Protection OUT_, Human Body Model ±8kV

DYNAMIC

MAX9890A

Turn-On Time (Note 4) t

ON

MAX9890B

ms

Turn-Off Time t

OFF

(Note 5)

ns

Bandwidth

kHz

Total Harmonic Distortion Plus
Noise

RL = 32Ω, 30mW, f = 1kHz

%

Off-Isolation, IN_ to OUT_ f = 20kHz, SHDN = GND, RL = 32Ω

dB

Crosstalk (Switches ON) f = 20kHz

dB

V

RIPPLE

= 0.5V

P-P

at 20Hz, fIN = 3kHz at

1V

P-P

, RL = 32Ω

V

RIPPLE

= 0.5V

P-P

at 1kHz, fIN = 3kHz at

1V

P-P

, RL = 32Ω

Power-Supply Rejection Ratio
(Note 6)

PSRR

V

RIPPLE

= 0.5V

P-P

at 20kHz, fIN = 3kHz

at 1V

P-P

, RL = 32Ω

-84

dB

0.001

V

CC

R

FLAT(ON

R

OUT(DIS

THD+N

220

0.001

200

330

120

>100

0.003

-108

-100

-100

-100

MAX9890

Audio Click-Pop Suppressor

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCC= 3V, SHDN = VCC, GND = 0, C

CEXT

= 0.1µF, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

(Note 1)

Note 1: All devices are 100% tested at TA= +25°C. All temperature limits are guaranteed by design.
Note 2: Supply current is measured when switch is on (i.e., SHDN = V

CC

, t > tON).

Note 3: Supply voltage level where the device enters its power-down cycle.
Note 4: Turn-on time is measured from the time V

CC

= 3V and SHDN > VIHuntil the RONspecification is met.

Note 5: Switch turn-off time is measured from the time SHDN < V

IL

or VCC< V

UVLO

until the off-isolation specification is met.

Note 6: See the Power-Supply Rejection Ratio section for test method.

Typical Operating Characteristics

(VCC= 3V, C

CEXT

= 0.1µF, typical values are at TA= +25°C, unless otherwise noted.)

ON-RESISTANCE vs. IN_ VOLTAGE

MAX9890 toc01

IN_ VOLTAGE (V)

ON-RESISTANCE (Ω)

4321

0.3

0.4

0.5

0.6

0.7

0.8

0.2
05

VCC = 3V

VCC = 5V

SUPPLY CURRENT vs. TEMPERATURE

MAX9890 toc02

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

6035-15 10

5

10

15

20

25

30

35

40

0

-40 85

VCC = 5.5V

VCC = 2.7V

SHUTDOWN CURRENT vs. TEMPERATURE

MAX9890 toc03

TEMPERATURE (°C)

SHUTDOWN CURRENT (pA)

603510-15

100

200

300

400

500

600

700

800

900

1000

0

-40 85

VCC = 2.7V

VCC = 5.5V

SHDN = 0V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

LOGIC INPUT (SHDN)

Logic-Input High Voltage V

Logic-Input Low Voltage V

Logic-Input Current I

IH

IL

IN

VCC = 2.7V to 5.5V 2.0 V

VCC = 2.7V to 5.5V 0.8 V

±1 µA

MAX9890

Audio Click-Pop Suppressor

4 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= 3V, C

CEXT

= 0.1µF, typical values are at TA= +25°C, unless otherwise noted.)

1.0

0.8

0.6

0.4

0.2

0

-0.2

ON-LOSS (dB)

-0.4

-0.6

-0.8

-1.0

ON-LOSS vs. FREQUENCY

RL = 32Ω

RL = 16Ω

10k1k10010 100k

FREQUENCY (Hz)

MAX9890 toc04

PHASE SHIFT (DEGREES)

PHASE SHIFT vs. FREQUENCY

2

1

0

-1

-2

-3

-4

-5
10010

FREQUENCY (Hz)

RL = 32Ω

RL = 16Ω

10k1k 100k

MAX9890 toc05

OFF-ISOLATION (dB)

OFF-ISOLATION vs. FREQUENCY

10

-10

-30

-50

-70

-90

-110

-130

-150

RL = 32Ω

RL = 16Ω

FREQUENCY (Hz)

MAX9890 toc06

10k1k10010 100k

-50

-60

-70

-80

-90

-100

-110

CROSSTALK (dB)

-120

-130

-140

-150

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. OUTPUT POWER

100

VCC = 3V

= 16Ω

R

L

10

f = 1kHz

1

THD+N (%)

0.1

0.01

CROSSTALK vs. FREQUENCY

10k1k10010 100k

FREQUENCY (Hz)

MAX9890 toc07

MAX9890 toc10

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. OUTPUT POWER

100

VCC = 5V

= 16Ω

R

L

10

f = 1kHz

1

THD+N (%)

0.1

0.01

0.001
0250

OUTPUT POWER (mW)

MAX9890 toc08

THD+N (%)

225200175150125100755025

0.001

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. OUTPUT POWER

100

VCC = 3V

= 32Ω

R

10

1

THD+N (%)

0.1

0.01

L

f = 1kHz

MAX9890 toc11

THD+N (%)

0.001

TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER

100

VCC = 5V

= 32Ω

R

L

10

f = 1kHz

1

0.1

0.01

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

1

VCC = 5V

= 16Ω

R

L

0.1

0.01

OUTPUT POWER = 25mW

MAX9890 toc09

100806040200120

OUTPUT POWER (mW)

MAX9890 toc12

OUTPUT POWER = 150mW

0.001
0

OUTPUT POWER (mW)

225200175150125100755025

0.001

OUTPUT POWER (mW)

100806040200120

0.0001
10 100k

FREQUENCY (Hz)

10k1k100