MAX9727 Datasheet, PDF (1/1 Pages) Maxim Integrated Products – Quad Audio Line Driver with 3VRMS Output

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