The CXAR41187 stereo headphone amplifier is designed for portable equipment where board space is at a premium. The CXAR41187 uses capless architecture to produce a ground-referenced output from a single power supply, eliminating the need for large DC-blocking capacitors for output, saving cost, board space, and component height. Additionally, for CXAR41187B and CXAR41187C, the gain is set internally (-2V/V or -1.5V/V), further reducing component count. For CXAR41187A, the gain can be adjusted by external feedback resistors
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[ CXAR41187 ]"
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产品概述 返回TOP
The CXAR41187 stereo headphone amplifier is designed for portable equipment where board space is at a premium. The CXAR41187 uses capless architecture to produce a ground-referenced output from a single power supply, eliminating the need for large DC-blocking capacitors for output, saving cost, board space, and component height. Additionally, for CXAR41187B and CXAR41187C, the gain is set internally (-2V/V or -1.5V/V), further reducing component count. For CXAR41187A, the gain can be adjusted by external feedback resistors.
The CXAR41187 delivers up to 95mW per channel into a 32Ω load and has low 0.01% THD+N. A -90dB power supply rejection ratio (PSRR) at 217Hz allows this device to operate from noisy digital supplies without an additional linear regulator. Comprehensive click-and-pop circuitry suppresses audible clicks and pops on startup and shutdown. Independent left/right, low-power shutdown controls make it possible to optimize power savings in mixed-mode, mono/stereo applications.
The CXAR41187 operates from a single 2.7V to 5.5V supply, consumes only 5.6mA supply current, has short-circuit and thermal-overload protections, and is specified over the extended -40℃ to +85℃ temperature range. The CXAR41187 is available in a Green TQFN-4×4-20L package.
产品特点 返回TOP
• CXAR41187A: External Feedback Gain Network
CXAR41187B: Fixed -2V/V Gain
CXAR41187C: Fixed -1.5V/V Gain
• No Bulky DC-Blocking Capacitors Required
• Ground-Referenced Outputs Eliminate DC-Bias
Voltage on Headphone Ground Pin
• No Degradation of Low-Frequency Response Due
to Output Capacitors
• 95mW into 32Ω Load from 5V Power Supply at
THD+N = 0.1% (TYP, per Channel)
• Low 0.01% THD+N
• High PSRR (-90dB at 217Hz)
• Integrated Click-and-Pop Suppression
• 2.7V to 5.5V Single Supply Operation
• Low Quiescent Current (5.6mA at VDD = 5V)
• Independent Left/Right, Low-Power
Shutdown Controls
• Short-Circuit and Thermal-Overload Protections
• Undervoltage Lockout Function
• -40℃ to +85℃ Operating Temperature Range
• Available in Green TQFN-4×4-20L Package
应用范围 返回TOP
Notebook PCs
Cellular Phones
PDAs
MP3 Players
Smart Phones
Portable Audio Equipment
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产品封装图 返回TOP
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耳机驱动器 |
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|
Part Number |
CH |
SHDN |
VCC(Min) (V) |
VCC(Max)(V) |
Differential Input |
Output Power/CH @RL=16Ω(mW) |
Output Power/CH @RL=32Ω(mW) |
Package |
|
Stereo |
L |
2.5 |
5.5 |
N |
158 |
87 |
MSOP-8 |
|
|
Stereo |
H |
2.5 |
5.5 |
N |
158 |
87 |
MSOP-8 |
|
|
Stereo |
H |
2.7 |
5.5 |
Y |
132 |
82 |
MSOP-10 |
|
|
Stereo |
L |
2.7 |
5.5 |
N |
95 |
TQFN-4x4-20L |
||
|
Stereo |
L |
2.5 |
5.5 |
N |
145 |
85 |
TDFN-2x2-8L |
|
|
Stereo |
L |
2.7 |
5.5 |
N |
88 |
TQFN-3x3-12L |
||
|
Stereo |
L |
2.7 |
5.5 |
Y |
80 |
TQFN-3x3-16L |
||
|
Stereo |
L |
2.7 |
5.1 |
N |
80 |
TDFN-3x3-10L |
||
