MAX9787ETI+T Maxim Integrated Products, MAX9787ETI+T Datasheet

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MAX9787ETI+T

Manufacturer Part Number
MAX9787ETI+T
Description
IC AMP AUDIO PWR 2.2W AB 28TQFN
Manufacturer
Maxim Integrated Products
Type
Class ABr
Datasheet
1.MAX9787ETI.pdf (15 pages)

Specifications of MAX9787ETI+T

Output Type
2-Channel (Stereo)
Max Output Power X Channels @ Load
2.2W x 2 @ 3 Ohm
Voltage - Supply
4.5 V ~ 5.5 V
Features
Depop, Short-Circuit and Thermal Protection, Shutdown, Volume Control
Mounting Type
Surface Mount
Package / Case
28-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX9787 combines a stereo, 2.2W audio power
amplifier with an analog volume control in a single device.
A high 90dB PSRR and low 0.01% THD+N ensures clean,
low-distortion amplification of the audio signal.
The analog volume control can be driven with a poten-
tiometer, an RC-filtered PWM source, or a DAC output.
A BEEP input allows the addition of alert signals from
the controller to the audio path.
Industry-leading, click-and-pop suppression eliminates
audible transients during power and shutdown cycles.
Other features include single-supply voltage, a shut-
down mode, logic-selectable gain, thermal-overload,
and output short-circuit protection.
The MAX9787 is offered in a space-saving, thermally
efficient, 28-pin thin QFN (5mm x 5mm x 0.8mm) pack-
age, and is specified over the extended -40°C to +85°C
temperature range.
19-3882; Rev 1; 1/07
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.
Notebook PCs
Flat-Panel TVs
Tablet PCs
PC Displays
Typical Operating Circuit
VOLUME
BEEP
Σ
Σ
________________________________________________________________ Maxim Integrated Products
General Description
+5V
Portable DVD Players
LCD Projectors
Multimedia Monitors
2.2W Stereo Audio Power Amplifier
MAX9787
Applications
with Analog Volume Control
♦ Class AB, 2.2W, Stereo BTL Speaker Amplifiers
♦ Analog Volume Control
♦ BEEP Input with Glitch Filter
♦ 5V Single-Supply Operation
♦ High 90dB PSRR
♦ Low-Power Shutdown Mode
♦ Industry-Leading Click-and-Pop Suppression
♦ Low 0.01% THD+N at 1kHz
♦ Short-Circuit and Thermal Protection
♦ Selectable-Gain Settings
♦ Space-Saving 28-Pin TQFN (5mm x 5mm x 0.8mm)
Note: This device is specified for over -40°C to +85°C operat-
ing temperature range.
+Denotes lead-free package.
*EP = Exposed pad.
MAX9787ETI+
TOP VIEW
*EXPOSED PAD.
GAIN2
GAIN1
SHDN
PART
GND
VOL
V
INR
DD
22
23
24
25
26
27
28
+
*EP
21
1
20
2
PIN-PACKAGE
Ordering Information
28 TQFN-EP*
THIN QFN
19
3
MAX9787
Pin Configuration
18
4
17
5
16
6
15
7
Features
PKG CODE
14
13
12
11
10
9
8
T2855N-1
N.C.
N.C.
V
CPV
C1N
CPGND
C1P
SS
SS
1

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MAX9787ETI+T Summary of contents

Page 1

... BEEP MAX9787 VOLUME ________________________________________________________________ Maxim Integrated Products 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. with Analog Volume Control ♦ Class AB, 2.2W, Stereo BTL Speaker Amplifiers ♦ Analog Volume Control ♦ ...

Page 2

Stereo Audio Power Amplifier with Analog Volume Control ABSOLUTE MAXIMUM RATINGS Supply Voltage ( CPV to GND) .......................+ GND to PGND.....................................................................±0.3V CPV , C1N GND .........................-6.0V to (GND + 0.3V) SS ...

Page 3

Stereo Audio Power Amplifier ELECTRICAL CHARACTERISTICS (continued) = 5V, GND = PGND = CPGND = 0V, SHDN = CPV terminated between OUT_+ and OUT_-, GAIN1 = GAIN2 = VOL = 0V, ...

Page 4

Stereo Audio Power Amplifier with Analog Volume Control (Measurement BW = 22Hz to 22kHz TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY 3Ω 10.5dB V 1 OUTPUT POWER ...

Page 5

Stereo Audio Power Amplifier (Measurement BW = 22Hz to 22kHz POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 200mV RIPPLE P-P - 10.5dB V OUTPUT REFERRED -20 -30 -40 -50 -60 -70 -80 -90 -100 ...

Page 6

Stereo Audio Power Amplifier with Analog Volume Control PIN NAME 1 INL Left-Channel Audio Input 2 BEEP Audible Alert Beep Input 3, 19 PGND Power Ground 4 OUTL+ Left-Channel Positive Speaker Output 5 OUTL- Left-Channel Negative Speaker Output 6, ...

Page 7

Stereo Audio Power Amplifier Detailed Description The MAX9787 combines a 2.2W bridge-tied load speak- er amplifier and an analog volume control, BEEP input, and four-level gain control. The MAX9787 features high 90dB, low 0.01% THD+N, industry-leading click-pop performance, and ...

Page 8

Stereo Audio Power Amplifier with Analog Volume Control Table 2. Volume Levels V VOL (V) V MIN * V TYP * 0 0.370 0.742 0.800 0.860 0.915 0.977 1.035 1.094 1.150 1.211 1.265 1.328 1.385 1.446 1.500 1.563 1.620 ...

Page 9

Stereo Audio Power Amplifier PV are negated. The gain step sizes are not con- DD stant; the step sizes are 0.5dB/step at the upper extreme, 2dB/step in the midrange, and 4dB/step at the lower extreme. Figure 3 shows the ...

Page 10

Stereo Audio Power Amplifier with Analog Volume Control Applications Information BTL Speaker Amplifiers The MAX9787 features speaker amplifiers designed to drive a load differentially, a configuration referred to as bridge-tied load (BTL). The BTL configuration (Figure 5) offers advantages ...

Page 11

Stereo Audio Power Amplifier Table 3. Suggested Capacitor Manufacturers SUPPLIER Taiyo Yuden TDK Thermal-overload protection limits total power dissipa- tion in these devices. When the junction temperature exceeds +160°C, the thermal-protection circuitry dis- ables the amplifier output stage. The ...

Page 12

Stereo Audio Power Amplifier with Analog Volume Control CPV DD The CPV bypass capacitor (C3) lowers the output DD impedance of the power supply and reduces the impact of the MAX9787’s charge-pump switching tran- sients. Bypass CPV with C3, ...

Page 13

Stereo Audio Power Amplifier with Analog Volume Control 0.1µF MAX9787 C IN 1µF GAIN/ INL 1 LEFT-CHANNEL VOLUME AUDIO INPUT CONTROL C IN 1µF GAIN/ INR 27 RIGHT-CHANNEL VOLUME AUDIO INPUT CONTROL 21 BIAS C BIAS 1µF VOL 28 ...

Page 14

Stereo Audio Power Amplifier with Analog Volume Control (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 14 ______________________________________________________________________________________ Package Information ...

Page 15

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 © 2007 Maxim Integrated Products ...

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