DS1882E-050+ Datasheet DS1882E-050+, DS1882Z-050+ | P1-P3

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

) and the

communication circuitry (V

). For clickless/popless

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.

Applications

Notebook and PC Audio

Portable Audio Equipment

Car Stereo

Consumer Audio/Video

Features

♦ Dual, Audio Log Taper Potentiometers

♦ Low THD+N and Crosstalk

♦ ±7V Analog Supply (Independent of Digital

Supply)

♦ 5V Digital Supply

♦ 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

C*-Compatible Serial Interface

♦ Three Address Pins Allow Up to 8 Devices on

C Bus

♦ 45kΩ Potentiometer End-to-End Resistance

♦ Industrial Temperature Range (-40°C to +85°C)

♦ 16-Pin TSSOP or SO Package

DS1882

Dual Log Audio Digital Potentiometer

______________________________________________ Maxim Integrated Products 1

SCL

SDAV-

GND

TOP VIEW

H1L0

98L1H0

TSSOP/SO

DS1882

Pin Configuration

Rev 0; 6/06

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.

+Denotes lead-free package.

Ordering Information

PART

TEMP

RANGE

VERSION

(kΩ)

PIN-

PACKAGE

DS1882E-050+

-40°C to +85°

16 TSSOP

(173 mils)

DS1882E-050+T&R

-40°C to +85°

16 TS S O P

( 173 m i l s)

Tap e- and - Reel

DS1882Z-050+

-40°C to +85°

16 S O

( 150 m i l s)

DS1882Z-050+T&R

-40°C to +85°

16 S O

( 150 m i l s)

Tap e- and - Reel

Typical Operating Circuit appears at end of data sheet.

DS1882

Dual Log Audio Digital Potentiometer

2 _____________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

RECOMMENDED OPERATING CONDITIONS

= -40°C to +85°C)

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.

Voltage on V

, SDA, and SCL Relative to GND .....-0.5V to +6.0V

Voltage on A2, A1, A0, and

CE Relative

to GND .................-0.5V to (V

+ 0.5V), not to exceed +6.0V

Voltage on V

Relative to GND...........................-0.5V to +8.0V

Voltage on H1, H0, W1, W0, L1, and L0 Relative

to GND............................................(V- - 0.5V) to (V

+ 0.5V)

Voltage on V- Relative to GND ..............................-8.0V to +0.5V

Maximum Resistor Current .................................................±3mA

Operating Temperature Range ...........................-40°C to +85°C

Programming Temperature Range .........................0°C to +70°C

Storage Temperature Range .............................-55°C to +125°C

Soldering Temperature...................See J-STD-020 Specification

PARAMETER

SYMBOL

CONDITIONS MIN

TYP MAX

UNITS

Digital Supply Voltage

(Notes 1, 2) 4.5 5.5 V

Analog Supply Range

(Notes 1, 2) 4.5 7.0 V

Negative Supply Voltage

V-

(Notes 1, 2) -7.0 -4.5 V

Potentiometer Voltages -V V

Wiper Current ±1 mA

DC ELECTRICAL CHARACTERISTICS

= +4.5V to +5.5V, V

= +4.5V to +7.0V, V- = -4.5V to -7.0V, T

= -40°C to +85°C.)

PARAMETER

SYMBOL

CONDITIONS MIN

TYP MAX

UNITS

Digital Supply Current I

(Note 3) 0.2 5 µA

Analog Supply Current I

(Note 4) 2.5 10 µA

Input Logic 0

(CE, SDA, SCL, A0, A1, A2)

(Note 5) -0.3

0.15 x

Input Logic 1

(CE, SDA, SCL, A0, A1, A2)

(Note 5)

0.8 x

0.3

= 4mA 0.4

Output-Voltage Low (SDA) V

= 6mA 0.6

Input Leakage Current I

-1 +1 µA

I/O Pin Input Current (SDA) 0.4V < V

SDA

< (0.9 x V

) -10 +10 µA

I/O Capacitance C

I/O

(Note 6) 10 pF

Power-Up Time t

1ms

DS1882

Dual Log Audio Digital Potentiometer

_____________________________________________________________________ 3

C CHARACTERISTICS (See Figure 4)

= +4.5V to +5.5V, V

= +4.5V to +7.0V, V- = -4.5V to -7.0V, T

= -40°C to +85°C. Timing referenced to V

IL(MAX)

and V

IH(MIN)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SCL Clock Frequency f

SCL

(Note 9) 0 400 kHz

Bus Free Time Between STOP and

START Conditions

BUF

1.3 µs

Hold Time (Repeated) START Condition t

HD:STA

0.6 µs

Low Period of SCL t

LOW

1.3 µs

High Period of SCL t

HIGH

0.6 µs

Data Hold Time

HD:DAT

0 0.9 µs

Data Setup Time

SU:DAT

200 ns

START Setup Time

SU:STA

0.6 µs

SDA and SCL Rise Time t

(Note 10)

20 +

0.1C

300 ns

SDA and SCL Fall Time t

(Note 10)

20 +

0.1C

300 ns

STOP Setup Time

SU:STO

0.6 µs

SDA and SCL Capacitive Loading C

(Note 10) 400 pF

EEPROM Write Time t

(Note 11) 5 10 ms

ANALOG POTENTIOMETER CHARACTERISTICS

= +4.5V to +5.5V, V

= +4.5V to +7.0V, V- = -4.5V to -7.0V, T

= -40°C to +85°C.)

PARAMETER

SYMBOL

CONDITIONS MIN

TYP MAX

UNITS

End-to-End Resistance R

+25°C45kΩ

End-to-End Resistance Tolerance +25°C -20 +20 %

Ratiometric Temperature Coefficient (Note 6) 30

ppm/°C

End-to-End Resistance Temperature

Coefficient

(Note 6) 750

ppm/°C

Wiper Resistance R

160 250 Ω

Absolute Attenuation Tolerance (Note 7) -0.5

+0.5

Mute Position Attenuation 100 dB

Step Size Deviation from Nominal (Note 7)

-0.25 +0.25

Interchannel Matching (Note 7) -0.5

+0.5

-3dB Cutoff Frequency 10pF load 5

MHz

Output Noise

20Hz to 20kHz, grounded input,

tap = -6dB

2.2

µV

RMS

Crosstalk 1kHz, grounded input, tap = -6dB

-120

THD+N

1kHz, tap = -6dB, C

= 10pF

(Note 8)

0.005

Zero-Crossing Detection t

ZCD

38 50 ms

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15

DS1882E-050+

Mfr. #:

Buy DS1882E-050+

Manufacturer:

Maxim Integrated

Description:

Digital Potentiometer ICs Dual NV Audio Taper

Lifecycle:

New from this manufacturer.

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DS1882E-050+

DS1882E-050+

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