MAX5411 Maxim, MAX5411 Datasheet - Page 10

• Manufacturer Part Number: MAX5411
• Description: Dual / Audio / Log Taper Digital Potentiometers
• Manufacturer: Maxim

Dual, Audio, Log Taper Digital Potentiometers
10
Figure 5. Daisy-Chaining of Serial Interfaces
The power-on reset (POR) feature sets all the wipers to
the maximum attenuation (tap position 31, -62dB) at
power-up. If either V
on reset intiates when one of the supplies is brought
back to the operating voltage.
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.
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.
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.
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).
SDIN
SCLK
CS
______________________________________________________________________________________
SCLK
SDIN
CS
MAX5408–
MAX5411
DOUT
Applications Information
DD
SCLK
SDIN
CS
or V
Stereo Volume Control
MAX5408–
MAX5411
LOGIC
Attenuation Control
DOUT
is zero volts, a power-
Power-On Reset
Daisy-Chaining
Mute Function
SCLK
SDIN
CS
MAX5408–
MAX541
DOUT
TRANSISTOR COUNT: 12,875
PROCESS: BiCMOS
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.
Figure 6. Gain Control
MAX5409ETE
MAX5410EEE -40°C to +85°C 16 QSOP
MAX5410ETE
MAX5411EEE -40°C to +85°C 16 QSOP
MAX5411ETE
Ordering Information (continued)
V
OUT0
PART
V
IN0
-40°C to +85°C 16 Thin QFN
-40°C to +85°C 16 Thin QFN
-40°C to +85°C 16 Thin QFN
TEMP RANGE
W0A
H0
L0
MAX5408–
MAX5411
Chip Information
PACKAGE
PIN-
L1
W1A
H1
Gain Control
V
IN1
WIPERS PER
RESISTOR
2
1
1
2
2
V
OUT1