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參數(shù)資料
| 型號： | MAX4765 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Voltage. Dual SPDT. Audio Clickless Switches with Negative Rail Capability |
| 中文描述： | 低電壓、雙路SPDT音頻開關(guān)，無喀嗒聲，可處理負(fù)信號 |
| 文件頁數(shù)： | 8/15頁 |
| 文件大?。?/td> | 512K |
| 代理商： | MAX4765 |
M
Detailed Description
The MAX4762–MAX4765 are low on-resistance, low-
voltage, dual SPDT analog switches that operate from a
+1.8V to +5.5V supply and are fully specified for nomi-
nal 3.0V applications. The devices feature a negative
signal capability that allows signals below ground to
pass through without distortion and have break-before-
make switching.
The MAX4763/MAX4765 feature a comparator that can be
used for headphone or mute detection. The comparator
threshold is internally generated to be approximately 1/3
of V
CC
. The MAX4764/MAX4765 feature an internal shunt
switch to discharge any capacitance at the NO and NC
connection points. This reduces the click-and-pop sounds
that occur when switching audio signals.
Applications Information
Digital Control Inputs
The MAX4762–MAX4765 logic inputs accept up to
+5.5V, regardless of supply voltage. For example, with a
+3.3V supply, IN_ can be driven low to GND and high to
+5.5V allowing for mixing of logic levels in a system.
Driving IN_ Rail-to-Rail
minimizes power consumption.
For a +1.8V supply voltage, the logic thresholds are
0.5V (low) and 1.4V (high); for a +5V supply voltage, the
logic thresholds are 0.8V (low) and 2.0V (high).
Analog Signal Levels
The on-resistance of the MAX4762–MAX4765 changes
very little for analog input signals across the entire supply
voltage range (see the
Typical Operating Characteristics
).
The switches are bidirectional, so the NO_, NC_, and
COM_ pins can be either inputs or outputs.
The MAX4762–MAX4765 pass signals as low as V
CC
-
5.5V, including signals below ground with minimal
distortion.
Comparator (MAX4763/MAX4765)
The MAX4763/MAX4765 include a comparator that can
be used for mute and headphone detection functions.
The positive terminal of the comparator is internally set to
V
CC
/ 3. When the negative terminal (CMP-) is below the
threshold, the comparator output (CMPO) is a logic high.
When CMP- rises above V
CC
/ 3, CMPO is a logic low.
The comparator threshold of V
CC
/ 3 allows for detection
of headphones because headphone audio signals are
typically biased to V
CC
/ 2.
Shunt Switch (MAX4764/MAX4765)
The 100
shunt switches on the MAX4764/MAX4765
automatically discharge any capacitance at the NC_ or
NO_ terminals when they are unconnected to COM_.
This reduces audible click-and-pop sounds that occur
when switching between audio sources.
Audible clicks and pops are caused when a step DC
voltage is switched into the speaker. By automatically
discharging the side that is not connected, any residual
DC voltage is removed, thereby reducing the clicks
and pops.
Power-Supply Sequencing and
Overvoltage Protection
Caution: Do not exceed the absolute maximum ratings
since stresses beyond the listed ratings may cause
permanent damage to the device.
Proper power-supply sequencing is recommended for
all CMOS devices. Always apply V
CC
before applying
analog signals, especially if the analog signal is not
current-limited.
UCSP Applications Information
For the latest application details on UCSP construction,
dimensions, tape carrier information, printed circuit board
techniques, bump-pad layout, and recommended reflow
temperature profile, as well as the latest information on
reliability testing results, go to the Maxim’s website at
www.maxim-ic.com/ucsp and search for the Application
Note, “UCSP—A Wafer-Level Chip-Scale Package.”
Low-Voltage, Dual SPDT, Audio Clickless
Switches with Negative Rail Capability
8
_______________________________________________________________________________________
AUDIO
SOURCE 1
AUDIO
SOURCE 2
V+
3
MUTE
BUTTON
V+
MAX4765
OUT+
OUT-
OUT+
OUT-
NC1
NO1
NC2
NO2
CMPO
COM1
IN1
IN2
COM2
CMP-
8
SPEAKER
INPUT
SELECT
MUTE
SHUNT
SWITCH
Figure 1. Typical Operating Circuit
Rail to Rail is a registered trademark of Motorola Nippon Ltd.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX4762-MAX4765 | Low-Voltage, Dual SPDT, Audio Clickless Switches with Negative Rail Capability |
| MAX4762EBC-T | Low-Voltage, Dual SPDT, Audio Clickless Switches with Negative Rail Capability |
| MAX4763EBC-T | Low-Voltage, Dual SPDT, Audio Clickless Switches with Negative Rail Capability |
| MAX4764EBC-T | Low-Voltage, Dual SPDT, Audio Clickless Switches with Negative Rail Capability |
| MAX4762ETB | Low-Voltage, Dual SPDT, Audio Clickless Switches with Negative Rail Capability |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4765EBC | 制造商:Maxim Integrated Products 功能描述:LOW-VOLTAGE DUAL SPDT AUDIO CLICK - Rail/Tube |
| MAX4765EBC+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX4765ETC+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX4766AETA | 制造商:Maxim Integrated Products 功能描述:.075A TO 1.4A ADJUSTABLE CURRENT LI - Rail/Tube |
| MAX4766AETA+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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