Datasheet
Chip Information
TRANSISTOR COUNT: 12,875
PROCESS: BiCMOS
MAX5408–MAX5411
Dual, Audio, Log Taper Digital Potentiometers
10 ______________________________________________________________________________________
MAX5408–
MAX5411
MAX5408–
MAX5411
MAX5408–
MAX541
SDIN
SCLK
CS
DOUT SDIN
SCLK
CS
DOUT SDIN
SCLK
CS
DOUT
CS
SCLK
SDIN
MAX5408–
MAX5411
W0A W1A
L0
L1
H0
H1
V
OUT0
V
OUT1
V
IN0
V
IN1
Figure 6. Gain Control
Figure 5. Daisy-Chaining of Serial Interfaces
Ordering Information (continued)
PART TEMP RANGE
PIN-
PACKAGE
WIPERS PER
RESISTOR
MAX5409ETE -40°C to +85°C 16 Thin QFN 2
MAX5410EEE -40°C to +85°C 16 QSOP 1
MAX5410ETE -40°C to +85°C 16 Thin QFN 1
MAX5411EEE -40°C to +85°C 16 QSOP 2
MAX5411ETE -40°C to +85°C 16 Thin QFN 2
circuit (see Figure 2). With zero-crossing enabled, the
MAX5408–MAX5411 change wiper position after 50ms
or when zero crossing is detected.
Power-On Reset
The power-on reset (POR) feature sets all the wipers to
the maximum attenuation (tap position 31, -62dB) at
power-up. If either V
DD
or V
LOGIC
is zero volts, a power-
on reset intiates when one of the supplies is brought
back to the operating voltage.
Mute Function
When mute is enabled, the wipers go to -90dB attenua-
tion. When mute is disabled, the wiper returns to its
position before mute was enabled. All wipers can be
muted simultaneously or independently.
Applications Information
Attenuation Control
Figure 3 shows the application of an attenuation control.
The op amps are connected in a follower configuration
with a fixed gain. The digitally controlled potentiometer
attenuates the input signal.
Stereo Volume Control
Figure 4 shows the application of stereo volume con-
trol using MAX5409/MAX5411. The op amps are con-
nected in a follower configuration with fixed gain. The
digitally controlled potentiometer attenuates the input
signals. The second wiper of each potentiometer con-
trols the signal amplitude at the rear set of speakers.
Daisy-Chaining
Figure 5 shows an application daisy-chaining the
serial-interfaces of the MAX5408–MAX5411. A single-
write command updates multiple devices from a single
digital port in this configuration (see Digital Serial
Interface section).
Gain Control
Figure 6 shows the application of a gain control.
Note: Muting the potentiometer creates unpredictable
behavior at the output of the op amp, and may seriously
degrade the performance of the op amp.