ds4420nt-r Maxim Integrated Products, Inc., ds4420nt-r Datasheet

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ds4420nt-r

Manufacturer Part Number
ds4420nt-r
Description
Ds4420 I?c Programmable Gain Amplifier For Audio Applications
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
The DS4420 is a fully differential, programmable-gain
amplifier for audio applications. It features a -35dB to
+25dB gain range controlled by an I
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 I
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.
Rev 0; 9/06
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.
TOP VIEW
Telephone Headsets
Audio Volume Control
Microphone Gain Control
GND
SDA
SCL
V
A2
A1
A0
CC
1
2
3
4
5
6
7
(3mm x 3mm x 0.8mm)
General Description
SOURCE
TDFN
DS4420
AUDIO
Pin Configuration
MICROPR0CESSOR-
CONTROLLED GAIN
I
Applications
2
2
______________________________________________ Maxim Integrated Products
C interface and it
14
13
12
11
10
C Programmable-Gain Amplifier
9
8
AV
OUT+
OUT-
AGND
N.C.
IN-
IN+
CC
SDA
SCL
IN+
IN-
A2
A1
A0
2
C slave
I
2
DS4420
C INTERFACE
V
CC
GND
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 I
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
+ Denotes lead-free package.
* EP = Exposed paddle.
DS4420+
for Audio Applications
-35dB
TO +25dB
GAIN
I
AGND
2
C Bus
PART
AV
CC
OUT+
OUT-
Typical Operating Circuit
-20°C to +70°C
TEMP RANGE
Ordering Information
AMPLIFIER
AUDIO
PIN-PACKAGE
14 TDFN-EP*
Features
2
C Interface
1

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ds4420nt-r Summary of contents

Page 1

Rev 0; 9/06 General Description The DS4420 is a fully differential, programmable-gain amplifier for audio applications. It features a -35dB to +25dB gain range controlled optimized to drive loads as low as 50Ω. The gain is ...

Page 2

I C Programmable-Gain Amplifier for Audio Applications ABSOLUTE MAXIMUM RATINGS Voltage SDA, and SCL CC Relative to GND.................................................-0.5V to +6.0V Voltage on A0, A1, and A2 Relative to GND ......................................-0. Voltage on IN+, IN-, ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +4.5V to +5.5V -20°C to +70°C, unless otherwise noted PARAMETER Amplifier Output Current (Sinking) Resistive Load Range Capacitive Load Closed-Loop Bandwidth Passband Flatness Output Noise (Note 5) Total Harmonic Distortion (Note ...

Page 4

I C Programmable-Gain Amplifier for Audio Applications Note 1: All voltages are referenced to ground. Currents entering the IC are specified positive, and currents exiting the IC are negative. Note 2: Standby supply current specified with SDA = SCL ...

Page 5

5.0V, unless otherwise noted POWER-SUPPLY REJECTION RATIO vs. GAIN SETTING 120 1kHz 100 50Ω LOAD 80 60 20kHz 40 50Ω LOAD GAIN SETTING GAIN ...

Page 6

I C Programmable-Gain Amplifier for Audio Applications PIN NAME 1 A2 Address Select Inputs—Determine SCL I C Serial Clock—Input for SDA I C Serial Data—Input/Output for ...

Page 7

Control Register (F8h) Power-Up Default: 1000 0000 b F8h Standby x bit 7 Standby: Places the DS4420 in standby mode. bit Normal operation Places the DS4420 in standby mode. (Power-up default.) bit 6 Don’t care. ...

Page 8

I C Programmable-Gain Amplifier for Audio Applications SDA t BUF t LOW SCL t HD:STA STOP START NOTE: TIMING IS REFERENCE TO V AND V . IL(MAX) IH(MIN) 2 Figure Timing Diagram Serial ...

Page 9

Byte Read: A byte read is an 8-bit information transfer from the slave to the master plus a 1-bit ACK or NACK from the master to the slave. The 8 bits of information that are transferred (most significant bit first) ...

Page 10

... Figure 5. Internal Ground Connections is IN TRANSISTOR COUNT: 5347 SUBSTRATE CONNECTED TO: Ground For the latest package outline information ic.com/DallasPackInfo registered trademark of Maxim Integrated Products, Inc. Internal Ground Connections 13Ω TYPICAL GND AGND Chip Topology Package Information www.maxim- ...

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