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EVALUATION KIT AVAILABLE
MAX97220A–MAX97220E
Differential Input DirectDrive Line Drivers/Headphone Amplifiers
General Description
The MAX97220_ is a differential input DirectDrive® line driver/headphone amplifier. This device is capable of driving line level loads with 3VRMS into 1kI with a 5V supply and 2VRMS into 600I loads from a 3.3V supply. A headphone load is capable of being driven with 125mW into 32I with a 5V supply. The IC is offered with an internally fixed 6dB gain or an externally set gain through external resistors. The external gain setting nodes can also be used to configure filters for set-top box applications. The IC has exceptional THD+N over the full audio bandwidth.
Two versions of the IC are available with different turnon times (tON). The A, C, and E versions for headphone applications feature a tON of 5.5ms while the B and D versions, intended for set-top-box applications, feature a 130ms tON. An on-chip charge pump inverts the powersupply input, creating a negative rail. The output stage of the amplifier is powered between the positive input supply and the output of the charge pump. The bipolar supplies bias the output about ground, eliminating the need for large, distortion-introducing output coupling capacitors. The IC powers on and off without clicks or pops.
The IC is available in a 3mm x 3mm x 0.8mm, 16-pin TQFN and is specified over the extended -40NC to +85NC temperature range.
Applications
Simple Multimedia Interfaces
Set-Top Boxes
Blu-rayK and DVD Players
LCD Televisions
Prosumer Audio Devices
Features
S Output Power 125mW into 32I with a 5V Supply S 3VRMS Output Drive into 1kI with a 5V Supply S 2VRMS Output Drive into 600I with a 3.3V Supply S Fully Differential Inputs S Fixed or Externally Adjustable Gain with No
Clicks or Pops S Wide 2.5V to 5.5V Operating Range S DirectDrive Outputs Eliminate DC-Blocking
Capacitors S Flat THD+N, Better Than 90dB in the Audio Band S 18-Bit SNR Performance, 112dB S Footprint Compatible with the MAX9722
Ordering Information
PART
PIN-
TOP GAIN TURN-ON
PACKAGE MARK SET TIME (ms)
MAX97220AETE+ 16 TQFN-EP* +AIF External 5.5
MAX97220BETE+ 16 TQFN-EP* +AIG External 130
MAX97220CETE+ 16 TQFN-EP* +AIH +6dB
5.5
MAX97220DETE+ 16 TQFN-EP* +AII +6dB
130
MAX97220EETE+ 16 TQFN-EP* +AII External 5.5
Note: All devices operate over the -40NC to +85NC temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad.
DirectDrive is a registered trademark of Maxim Integrated Products, Inc. Blu-ray is a trademark of the Blu-ray Disc Association.
Functional Diagrams appear at end of data sheet.
Simplified Block Diagrams
RF
RIN
LEFT
AUDIO INPUT
RIN
INLINL+
OUTL
RF
RIN RF
RIGHT AUDIO INPUT RIN
MAX97220A/B/E
INR+ OUTR
INR-
RF
INL-
LEFT AUDIO INPUT INL+
RIN RIN
RF
INR+
RIGHT AUDIO INPUT INR-
RIN RF RIN
RF OUTL
MAX97220C/D SGND SGND
OUTR
RF
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or.