MAX5410 データシートの表示（PDF） - Maxim Integrated

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MAX5410

Dual, Audio, Log Taper Digital Potentiometers

Maxim Integrated 

Dual, Audio, Log Taper Digital Potentiometers

SCLK

SCLK

SDIN SDIN

DOUT

SCLK

SDIN

DOUT

SCLK

SDIN

DOUT

CS

MAX5408–

MAX5411

CS

MAX5408–

MAX5411

CS

MAX5408–

MAX541

VOUT0

H0

VIN0

W0A

MAX5408–

MAX5411

H1

VIN1

W1A

L0

L1

VOUT1

CS

Figure 5. Daisy-Chaining of Serial Interfaces

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 VDD or VLOGIC 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.

Figure 6. Gain Control

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.

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

Chip Information

TRANSISTOR COUNT: 12,875

PROCESS: BiCMOS

10 ______________________________________________________________________________________

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