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MAX9775, MAX9776
2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
Improved 3D Stereo Sound Enhancement Over Competition, 3-Input Mixer/MUX Eliminates Need for External Switch, Integrated DirectDrive Amplifiers Save Board Space and Cost
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Status
Active: In Production.
Description
The MAX9775/MAX9776 combine a high-efficiency Class D, stereo/mono audio power amplifier with a mono DirectDrive® receiver amplifier and a stereo
DirectDrive headphone amplifier.
Maxim's 3rd-generation, ultra-low-EMI, Class D audio power amplifiers provide Class AB performance with Class D efficiency. The MAX9775/MAX9776 deliver 1.5W per channel into a 4Ω load from a 5V supply and offer efficiencies up to 79%. Active emissions limiting circuitry and spread-spectrum modulation greatly
reduce EMI, eliminating the need for output filtering found in traditional Class D devices.
The MAX9775/MAX9776 utilize a fully differential architecture, a full-bridged output, and comprehensive click-and-pop suppression. A 3D stereo enhancement function allows the MAX9775 to widen the stereo sound field immersing the listener in a cleaner, richer sound experience than typically found in portable applications. The devices utilize a flexible, user-defined mixer architecture
that includes an input mixer, volume control, and output mixer. All control is done through I²C.
The mono receiver amplifier and stereo headphone amplifier use Maxim's DirectDrive architecture that produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, space, and component height.
The MAX9775 is available in a 36-bump WLP (3mm x 3mm) package. The MAX9776 is available in a 32-pin TQFN (5mm x 5mm) or a 36-bump WLP (3mm x 3mm)
package. Both devices are specified over the extended -40°C to +85°C temperature range.
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Data Sheet
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An evaluation kit is available: MAX9776EVKIT
Key Features
- Unique Spread-Spectrum Modulation and Active Emissions Limiting Significantly Reduces EMI
- 3D Stereo Enhancement (MAX9775 Only)
- Up to 3 Stereo Inputs
- 1.5W Stereo Speaker Output (4Ω, VDD = 5V)
- 50mW Mono Receiver/Stereo Headphone Outputs (32Ω, VDD = 3.3V)
- High PSRR (68dB at 217Hz)
- 79% Efficiency (VDD = 3.3V, RL = 8Ω, POUT = 470mW)
- I²C Control—Input Configuration, Volume Control, Output Mode
- Click-and-Pop Suppression
- Low Total Harmonic Distortion (0.03% at 1kHz)
- Current-Limit and Thermal Protection
- Available in Space-Saving, 36-Bump WLP (3mm x 3mm) and 32-Pin TQFN (5mm x 5mm) Packages
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Applications/Uses
- Cell Phones—Mid and High Tier
- Handheld Gaming Consoles
- Portable Multimedia Players
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Key Specifications:
| Integrated Amplifiers |
| Part Number |
Functions |
Class |
Spkr. Amp. VCC
(V) |
Spkr. Amp. VCC
(V) |
Spkr. Amp. ICC
(mA) |
Spkr. Amp. POUT
(W) |
Spkr. Amp. Half Pwr. THD+N
(%) |
Hdph. Amp. VCC
(V) |
Hdph. Amp. VCC
(V) |
Hdph. Amp. ICC
(mA) |
Hdph. Amp. POUT into 32Ω
(mW) |
Hdph. Amp. Half Pwr. THD+N
(%) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| min |
max |
typ |
min |
max |
typ |
@ 1% THD+N |
max w/pins |
See Notes |
| MAX9775 |
Mobile Communication Subsystem |
D |
2.7 |
5.5 |
9.5 |
1.5 |
0.04 |
2.7 |
5.5 |
8 |
0.05 |
0.02 |
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- |
$1.05 @1k |
| MAX9776 |
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26 |
$1.00 @1k |
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See All Integrated Amplifiers (14)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Simplified Block Diagrams
Application Notes
Product Guides
Reliability Reports
| Reliability Report: |
MAX9775.pdf |
| Show FIT data for: |
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| Request Reliability Report for: |
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX9775EBX+TG45
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Active |
WLP;36 pin;WLP;
Outline Drawing:21-0024 (PDF)
Land Pattern: Not Available
Use pkgcode/variation: W363A3+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9776EBX+TG45
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Active |
WLP;36 pin;WLP;
Outline Drawing:21-0024 (PDF)
Land Pattern: Not Available
Use pkgcode/variation: W363A3+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9776ETJ+
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Active |
TQFN;32 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0012 (PDF)
Use pkgcode/variation: T3255+4*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9776ETJ+T
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Active |
TQFN;32 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0012 (PDF)
Use pkgcode/variation: T3255+4*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Similar Products by Function
| MAX9770 |
1.2W, Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers |
| MAX9702 |
1.8W, Filterless, Stereo, Class D Audio Power Amplifier and DirectDrive Stereo Headphone Amplifier |
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More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-0746
Rev 4;
2008-09-09
This page last modified: 2010-06-01
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