Datasheets»Maxim Integrated»DS1882Z-050+T&R Datasheet

DS1882Z-050+T&R Datasheet

Download or read online Maxim Integrated DS1882Z-050+T&R IC POT DIGIT DL LOG 50K 16SOIC pdf datasheet.



Page
1 of 15
next
Rev 0; 6/06
Dual Log Audio Digital Potentiometer
General Description
The DS1882 is a dual, nonvolatile (NV) digital poten-
tiometer designed to operate in audio systems that
accomodate up to ±7V signal levels. The potentiometer
settings can be stored in EEPROM so that they are
retained when the power is cycled. The DS1882 has
separate supplies for the potentiometers (V
communication circuitry (V
). For clickless/popless
DD
operation, a zero-crossing detector allows the wiper
position to change when there is no voltage across the
potentiometer. The DS1882 is also designed to mini-
mize crosstalk, and the two digital potentiometers pro-
vide 0.5dB channel-to-channel matching to prevent
volume differences between channels. Total harmonic
distortion (THD) is also minimal as long as the wiper
drives a high-impedance load.
Two attenuation configuration options provide optimum
flexibility for the specific application. Configuration
Option 1 provides 63 logarithmic tapered steps (0dB to
-62dB, 1dB/step) plus a mute setting. Configuration
Option 2 has 32 logarithmic steps plus mute and pro-
vides software compatibility with the DS1808. When
Configuration Option 2 is used in combination with the
16-pin SO package, the DS1882 is both software and pin
compatible with the DS1808 in 5V applications.
Notebook and PC Audio
Portable Audio Equipment
Car Stereo
Consumer Audio/Video
Pin Configuration
TOP VIEW
+
GND
1
A2
2
A1
3
V-
4
A0
5
DS1882
W0
6
L0
7
H0
8
TSSOP/SO
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.
♦ Dual, Audio Log Taper Potentiometers
♦ Low THD+N and Crosstalk
♦ ±7V Analog Supply (Independent of Digital
Supply)
♦ 5V Digital Supply
) and the
CC
♦ Potentiometer Settings Configurable as
Nonvolatile or Volatile
♦ Zero-Crossing Detector Eliminates Switching
Noise
♦ Two User-Configurable Attenuation Options
♦ Configuration Option 1: 63 Positions Provide 1dB
Attenuation Steps from 0dB to -62dB Plus Mute
♦ Configuration Option 2: (Software-Compatible
with the DS1808): 33 Positions Plus Mute as
Follows
Positions 0–12: 1dB per Step for 12 Steps
Positions 13–24: 2dB per Step for 12 Steps
Positions 25–32: 3dB per Step for 8 Steps
♦ I
2
C*-Compatible Serial Interface
♦ Three Address Pins Allow Up to 8 Devices on
2
I
C Bus
♦ 45kΩ Potentiometer End-to-End Resistance
♦ Industrial Temperature Range (-40°C to +85°C)
Applications
♦ 16-Pin TSSOP or SO Package
PART
DS1882E-050+
16
V
DS1882E-050+T&R -40°C to +85°C
DD
15
V
CC
14
SCL
DS1882Z-050+
13
SDA
12
CE
DS1882Z-050+T&R -40°C to +85°C
11
W1
10
H1
+Denotes lead-free package.
9
L1
Typical Operating Circuit appears at end of data sheet.
______________________________________________ Maxim Integrated Products
Features
Ordering Information
TEMP
VERSION
PIN-
RANGE
(kΩ)
PACKAGE
16 TSSOP
-40°C to +85°C
45
(173 mils)
16 TS S O P
45
( 173 m i l s)
Tap e- and - Reel
16 S O
-40°C to +85°C
45
( 150 m i l s)
16 S O
( 150 m i l s)
45
Tap e- and - Reel
1
Specifications of Maxim Integrated DS1882Z-050+T&R
Interface:
I²C, 2-Wire Serial
Memory Type:
Non-Volatile
Mounting Type:
Surface Mount
Number Of Circuits:
2
Operating Temperature:
-40°C ~ 85°C
Package / Case:
16-SOIC (3.9mm Width)
Resistance (ohms):
45K
Resistance In Ohms:
45K
Series:
-
Taps:
64
Temperature Coefficient:
750 ppm/°C Typical
Voltage - Supply:
4.5 V ~ 7 V

Summary of Contents

Page 1

... DS1882E-050 DS1882E-050T&R -40°C to 85° SCL DS1882Z-050 13 SDA 12 CE DS1882Z-050T&R -40°C to 85° Denotes lead-free package Typical Operating Circuit appears at end of data sheet. ___ Maxim Integrated Products Features Ordering Information TEMP VERSION PIN- RANGE (kΩ ...

Page 2

... Voltage on V- Relative to GND ...-8.0V to 0.5V Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...

Page 3

Dual Log Audio Digital Potentiometer ANALOG POTENTIOMETER CHARACTERISTICS (V 4.5V to 5.5V 4.5V to 7.0V -4.5V to -7.0V PARAMETER End-to-End Resistance End-to-End Resistance Tolerance Ratiometric Temperature Coefficient End-to-End Resistance Temperature Coefficient Wiper ...

Page 4

... Note 6: Guaranteed by design. Note 7: Above Position 50, these are typical maximum. Guaranteed by characterization. Note 8: Load is representative of the input of a low-noise audio amp. Note 9: Timing shown is for fast-mode (400kHz) operation. This device is also backward-compatible with I Note 10: C — ...

Page 5

Dual Log Audio Digital Potentiometer ( 5.0V -5.0V 25°C POTENTIOMETER 1 (CONFIGURATON 2) ATTENUATION vs. SETTING 0 -20.0 -40.0 -60.0 -80.0 -100 ...

Page 6

Dual Log Audio Digital Potentiometer PIN NAME 1 GND Ground Address Inputs. Inputs A0, A1, and A2 determine the Negative Analog Voltage Supply Address Input. ...

Page 7

Dual Log Audio Digital Potentiometer Detailed Description The DS1882 is a dual-channel, digitally controlled, audio potentiometer. The Block Diagram illustrates the features of the DS1882. The following sections discuss these features in detail. Potentiometer Configurations The DS1882 potentiometers have two ...

Page 8

Dual Log Audio Digital Potentiometer Table 2. Configuration Option 2 TAP POSITION ATTENUATION (dB ...

Page 9

Dual Log Audio Digital Potentiometer Potentiometer Wiper Setting are the values of the two MSBs of the Command Byte, then the wiper settings of the poten- tiometers are to be programmed. The lower 6 LSBs of ...

Page 10

Dual Log Audio Digital Potentiometer Configuration Register entered as the value of the two MSBs of the Command Byte, then the Configuration Register modified. The three LSBs of the Configuration CONFIGURATION REGISTER Factory Default: ...

Page 11

Dual Log Audio Digital Potentiometer Interface for the DS1882 The CE pin serves as a communication enable pin. When active (CE 0), the inputs SDA and SCL are rec- ognized by the device. If inactive (CE ...

Page 12

Dual Log Audio Digital Potentiometer Writing Command Byte Values An example of writing to the DS1882 is shown in Figure 2. The DS1882 has one write command that is used to change the Potentiometer Wiper Setting Registers and the Configuration ...

Page 13

Dual Log Audio Digital Potentiometer setup time (see Figure 4) before the next rising edge of SCL during a bit read. The device shifts out each bit of data on SDA at the falling edge of the previous SCL pulse, ...

Page 14

Dual Log Audio Digital Potentiometer Byte Write: A byte write consists of 8 bits of informa- tion transferred from the master to the slave (most sig- nificant bit first) plus a 1-bit acknowledgement from the slave to the master. The ...

Page 15

... TRANSISTOR COUNT: 52,353 SUBSTRATE CONNECTED TO GROUND Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ___ 15 © ...

Comments to this Datasheet