DS4420 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – I2C Programmable-Gain Amplifier for Audio Applications

Rev 0; 9/06
I²C Programmable-Gain Amplifier
for Audio Applications
General Description
The DS4420 is a fully differential, programmable-gain
amplifier for audio applications. It features a -35dB to
+25dB gain range controlled by an I²C interface and it
is optimized to drive loads as low as 50Ω. The gain is
adjustable in 3dB increments across the entire range.
Three address inputs, used to select the I²C slave
address, enable up to eight devices on a common bus.
The product operates from a single 5V supply over a
-20°C to +70°C temperature range. It is offered in a
3mm x 3mm TDFN package.
Applications
Telephone Headsets
Audio Volume Control
Microphone Gain Control
Pin Configuration
TOP VIEW
A2 1
A1 2
A0 3
SCL 4
SDA 5
V_CC 6
GND 7
DS4420
14 AV_CC
13 OUT+
12 OUT-
11 AGND
10 N.C.
9 IN-
8 IN+
TDFN
(3mm x 3mm x 0.8mm)
Features
o Differential Inputs and Outputs
o -35dB to +25dB Adjustable Gain
o Low Output Noise
o Low-Distortion Driving into a 50Ω Load
o 3dB Gain Steps Programmed through I²C Interface
o 5V Single Supply
o 20kHz Bandwidth for All Gain Settings
o Small 3mm x 3mm x 0.8mm TDFN Package
o Up to Eight DS4420s can be Placed on the Same
I²C Bus
Ordering Information
PART
DS4420+
TEMP RANGE
-20°C to +70°C
+Denotes lead-free package.
*EP = Exposed paddle.
PIN-PACKAGE
14 TDFN-EP*
Typical Operating Circuit
MICROPR0CESSOR-
CONTROLLED GAIN
AUDIO
SOURCE
VCC GND AGND AVCC
SDA
SCL
A2
I²C INTERFACE
A1
A0
OUT+
IN+
-35dB
IN-
TO +25dB
GAIN
OUT-
DS4420
AUDIO
AMPLIFIER
______________________________________________ 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.