Datasheet

DS1882
Dual Log Audio Digital Potentiometer
_____________________________________________________________________ 3
I
2
C CHARACTERISTICS (See Figure 4)
(V
DD
= +4.5V to +5.5V, V
CC
= +4.5V to +7.0V, V- = -4.5V to -7.0V, 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
200 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
= +4.5V to +5.5V, V
CC
= +4.5V to +7.0V, V- = -4.5V to -7.0V, 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 100 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
-120
dB
THD+N
1kHz, tap = -6dB, C
L
= 10pF
(Note 8)
0.005
%
Zero-Crossing Detection t
ZCD
38 50 ms