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DS1881E-050+ Datasheet

Download or read online Maxim Integrated DS1881E-050+ IC POT DIGIT DL NV 50K 16TSSOP pdf datasheet.



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Rev 0; 1/06
Dual NV Audio Taper Digital Potentiometer
General Description
The DS1881 is a dual, nonvolatile (NV) digital poten-
tiometer designed to operate in audio systems that
require 5V signal levels. The potentiometer settings can
be stored in EEPROM so that they are retained when the
power is cycled. The DS1881 has separate supplies for
the potentiometers (V
) and the communication circuit-
CC
ry (V
). For clickless/popless operation, a zero-crossing
DD
detector allows the wiper position to change when there
is no voltage across the potentiometer. The device is
also designed to minimize crosstalk, and the two digital
potentiometers provide 0.5dB channel-to-channel match-
ing 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 DS1881 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
N.C.
4
DS1881
A0
5
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
♦ 5V Analog Supply (Independent of Digital Supply)
♦ 3V to 5V Digital Supply Range
♦ Potentiometer Settings Configurable as NV
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
DS1881E-050+
16
V
DD
DS1881E-050+T&R -40°C to +85°C
15
V
CC
14
SCL
DS1881Z-050+
13
SDA
12
CE
11
W1
DS1881Z-050+T&R -40°C to +85°C
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 DS1881E-050+
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-TSSOP
Resistance (ohms):
45K
Resistance In Ohms:
45K
Series:
-
Taps:
64
Temperature Coefficient:
750 ppm/°C Typical
Voltage - Supply:
2.7 V ~ 5.5 V

Summary of Contents

Page 1

... Three Address Pins Allow Devices Bus 45kΩ Potentiometer End-to-End Resistance Industrial Temperature Range (-40°C to 85°C) Applications 16-Pin TSSOP or SO Package PART DS1881E-050 DS1881E-050T&R -40°C to 85° SCL DS1881Z-050 13 SDA DS1881Z-050T& ...

Page 2

... GND...-0.5V to 6.0V 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 NV Audio Taper Digital Potentiometer ANALOG POTENTIOMETER CHARACTERISTICS (V 2.7V to 5.5V 4.5V to 5.5V PARAMETER End-to-End Resistance End-to-End Resistance Tolerance Ratiometric Temperature Coefficient End-to-End Resistance Temperature Coefficient Wiper Resistance Absolute Attenuation Tolerance ...

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

Page 6

Dual NV Audio Taper Digital Potentiometer ( 5.0V 25°C THDN vs. FREQUENCY (0dB) 0.0018 0.0016 0.0014 0.0012 0.0010 0.0008 0.0006 0.0004 0.0002 0 0.01 0.1 1 FREQUENCY (kHz) PIN NAME 1 GND ...

Page 7

Dual NV Audio Taper Digital Potentiometer SDA SCL INTERFACE A0 CE POTENTIOMETER 0 VALUE H0 W0 ZERO-CROSSING L0 DETECTOR UPDATE ___ V DD CONFIGURATION REGISTER POTENTIOMETER SETTING DS1881 REGISTERS POTENTIOMETER 1 DECODER VALUE ZERO-CROSSING DETECTOR ...

Page 8

Dual NV Audio Taper Digital Potentiometer Detailed Description The DS1881 is a dual-channel, digitally controlled, audio potentiometer. The Block Diagram illustrates the features of the DS1881. The following sections discuss these features in detail. Potentiometer Configurations The DS1881 potentiometers have ...

Page 9

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

Page 10

Dual NV Audio Taper 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 ...

Page 11

Dual NV Audio Taper 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 ...

Page 12

Dual NV Audio Taper Digital Potentiometer Interface for the DS1881 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 ...

Page 13

Dual NV Audio Taper Digital Potentiometer Writing Command Byte Values An example of writing to the DS1881 is shown in Figure 2. The DS1881 has one write command that is used to change the Potentiometer Wiper Setting registers and the ...

Page 14

Dual NV Audio Taper 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 ...

Page 15

Dual NV Audio Taper 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. ...

Page 16

... Chip Topology 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. 16 ___Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © ...

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