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DS1881Z-050+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
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
CC
) and the communication circuit-
ry (V
DD
). For clickless/popless operation, a zero-crossing
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.
Applications
Notebook and PC Audio
Portable Audio Equipment
Car Stereo
Consumer Audio/Video
Features
♦ 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
I
2
C Bus
♦ 45kΩ Potentiometer End-to-End Resistance
♦ Industrial Temperature Range (-40°C to +85°C)
♦ 16-Pin TSSOP or SO Package
DS1881
Dual NV Audio Taper Digital Potentiometer
______________________________________________ Maxim Integrated Products 1
16
15
14
13
12
11
10
1
2
3
4
5
6
7
V
DD
V
CC
SCL
SDAN.C.
A1
A2
GND
TOP VIEW
CE
W1
H1L0
W0
98L1H0
A0
TSSOP/SO
DS1881
+
Pin Configuration
Rev 0; 1/06
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
DS1881E-050+
-40°C to +85°
C
45
16 TSSOP
(173 mils)
DS1881E-050+T&R
-40°C to +85°
C
45
16 TS S O P
( 173 m i l s)
Tap e- and - Reel
DS1881Z-050+
-40°C to +85°
C
45
16 S O
( 150 m i l s)
DS1881Z-050+T&R
-40°C to +85°
C
45
16 S O
( 150 m i l s)
Tap e- and - Reel
Typical Operating Circuit appears at end of data sheet.
DS1881
Dual NV Audio Taper Digital Potentiometer
2 _____________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED OPERATING CONDITIONS
(T
A
= -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
DD
, 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
DD
+ 0.5V), not to exceed +6.0V
Voltage on V
CC
Relative to GND...........................-0.5V to +6.0V
Voltage on H1, H0, W1, W0, L1, and L0 Relative
to GND...............................................................-0.5V to +6.0V
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
Digital Supply Voltage
V
DD
(Notes 1, 2) 2.7 5.5 V
Analog Supply Range
V
CC
(Notes 1, 2) 4.5 5.5 V
Potentiometer Voltages
0 5.5 V
Wiper Current ±1 mA
DC ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +5.5V, V
CC
= +4.5V to +5.5V, T
A
= -40°C to +85°C.)
PARAMETER
SYMBOL
CONDITIONS MIN
TYP MAX
Digital Supply Current I
DD
(Note 3) 200 250 µA
Analog Supply Current I
CC
(Note 4) 0.9 5 µA
Input Logic 0
(CE, SDA, SCL, A0, A1, A2)
V
IL
(Note 5) -0.3
0.3x
V
DD
V
Input Logic 1
(CE, SDA, SCL, A0, A1, A2)
V
IH
(Note 5)
0.7 x
V
DD
V
DD
+
0.3
V
I
OL
= 4mA 0.4
Output-Voltage Low (SDA) V
OL
I
OL
= 6mA 0.6
V
Input Leakage Current I
LI
-1 +1 µA
I/O Pin Input Current (SDA) 0.4V < V
SDA
< (0.9 x V
CC
) -10 +10 µA
I/O Capacitance C
I/O
(Note 6) 10 pF
Power-Up Time t
PU
1ms
DS1881
Dual NV Audio Taper Digital Potentiometer
_____________________________________________________________________ 3
I
2
C CHARACTERISTICS (See Figure 4)
(V
DD
= +2.7V to +5.5V, V
CC
= +4.5V to +5.5V, T
A
= -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
t
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
t
HD:DAT
0 0.9 µs
Data Setup Time
t
SU:DAT
100 ns
START Setup Time
t
SU:STA
0.6 µs
SDA and SCL Rise Time t
R
(Note 10)
20 +
0.1C
B
300 ns
SDA and SCL Fall Time t
F
(Note 10)
20 +
0.1C
B
300 ns
STOP Setup Time
t
SU:STO
0.6 µs
SDA and SCL Capacitive Loading C
B
(Note 10) 400 pF
EEPROM Write Time t
W
(Note 11) 5 10 ms
ANALOG POTENTIOMETER CHARACTERISTICS
(V
DD
= +2.7V to +5.5V, V
CC
= +4.5V to +5.5V, T
A
= -40°C to +85°C.)
PARAMETER
SYMBOL
CONDITIONS MIN
TYP MAX
UNITS
End-to-End Resistance R
EE
+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
W
160 250 Ω
Absolute Attenuation Tolerance (Note 7) -0.5
+0.5
dB
Mute Position Attenuation 80 dB
Step Size Deviation from Nominal (Note 7)
-0.25 +0.25
dB
Interchannel Matching (Note 7) -0.5
+0.5
dB
-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)
-110
dB
THD+N
1kHz, tap = -6dB, C
L
= 10pF
(Note 8)
0.005
%
Zero-Crossing Detection t
ZCD
38 50 ms
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

DS1881Z-050+

Mfr. #:
Buy DS1881Z-050+
Manufacturer:
Maxim Integrated
Description:
Digital Potentiometer ICs Dual NV Audio Tape
Lifecycle:
New from this manufacturer.
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