Datasheet MAX9727 (Maxim)

19-3860; Rev 0; 12/05
EVALUATION KIT AVAILABLE Quad Audio Line Driver with 3VRMS Output MAX9727 General Description Features
The MAX9727 quad audio line driver with 3VRMS output is o
2.7V to 5.5V Single-Supply Operation
ideal for portable audio devices where board space and o
High 100dB PSRR
cost is at a premium. The device uses Maxim’s DirectDriveTM architecture that produces a ground-refer- o
109dB Signal-to-Noise Ratio (SNR)
enced output from a single supply, eliminating the need o
Ground-Referenced Outputs
for large DC-blocking capacitors and saving cost, board o
No Audible Clicks or Pops at Power-Up/Down
space, and component height. A high 100dB PSRR and low 0.0005% THD+N ensures clean, low-distortion ampli- o
Differential Inputs
fication of the audio signal. Each MAX9727 amplifier can o
3VRMS into 1kΩ Load at 5V
provide 3VRMS to a 1kΩ load with less than 0.003% o
2VRMS into 1kΩ Load at 3.3V
THD+N while operating from a single +5V supply. Each MAX9727 amplifier can provide 2V o
3mA Supply Current Per Channel
RMS to a 1kΩ load with less than 0.003% THD+N while operating from a single o
Unity-Gain Stable
+3.3V supply. o
100nA Low-Power Shutdown Mode
A shutdown input disables the amplifiers and reduces o
CLOAD Drive > 220pF
quiescent current consumption to less than 100nA. The MAX9727 features Maxim’s comprehensive click-and- o
±8kV HBM ESD-Protected Outputs
pop suppression circuitry that reduces audible clicks and
Ordering Information
pops during startup and shutdown. The MAX9727 operates from a single 2.7V to 5.5V sup-
PIN-
ply, consumes only 3mA of supply current per channel,
PART TEMP RANGE GAIN PACKAGE
and is specified over the -40°C to +85°C extended tem- MAX9727EEP+ -40°C to +85°C 20 QSOP Adjustable perature range.
Applications
+Denotes lead-free package.
Simplified Block Diagram
Set-Top Boxes CD and DVD Players Consumer and Soundcards OUTA OUTD Professional Audio Portable Audio Equipment Devices A/V Receivers INA- IND-
Pin Configuration
INA+ IND+ TOP VIEW
+
INB+ INC+ OUTA 1 20 OUTD INA- 2 19 IND- INB- INC- INA+ 3 18 IND+ VDD 4 MAX9727 17 VSS OUTB INB+ 5 16 INC+ OUTC ON INB- 6 15 INC- OFF SHDN PVSS OUTB 7 14 OUTC SHDN 8 13 PV PV SS DD PGND MAX9727 PVDD 9 12 C1N C1P C1N C1P 10 11 PGND
QSOP ________________________________________________________________ Maxim Integrated Products 1 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.