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参数资料
| 型号： | LM4912MM/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.145 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| 封装： | MSOP-10 |
| 文件页数： | 11/16页 |
| 文件大小： | 490K |
| 代理商： | LM4912MM/NOPB |
Electrical Characteristics V
The following specifications apply for V
DD = 2.4V, RL = 16, CO = 100F, and CB = 4.7F unless otherwise specified. Limits apply
to T
A = 25°C.
Symbol
Parameter
Conditions
LM4912
Units
(Limits)
Typ
(Note 6)
Limit
(Note 7)
I
DD
Quiescent Power Supply Current
V
IN = 0V, IO = 0A
1.5
3
mA (max)
I
SD
Shutdown Current
V
SHUTDOWN = GND
0.1
2.0
A (max)
I
M
Mute Current
V
MUTE = VDD
1.5
3
mA (max)
P
O
Output Power
THD = 1%; f = 1kHz
mW
R = 16
25
R = 32
12
V
NO
Output Noise Voltage
BW = 20 Hz to 20kHz, A-weighted
10
V
PSRR
Power Supply Rejection Ratio
V
RIPPLE = 200mV sine p-p
65
dB
T
WU
Wake Up Time from Shutdown
2
s
V
OSD
Output Voltage Change on
Release from Shutdown
1
mV (max)
T
UM
Time to Un-Mute
0.01
0.02
s (max)
A
M
Mute Attenuation
f = 1kHz
80
db
Note 1:
All voltages are measured with respect to the GND pin unless otherwise specified.
Note 2:
: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device
is functional but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions
which guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters
where no limit is given, however, the typical value is a good indication of device performance.
Note 3:
: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX,
θ
JA, and the ambient temperature, TA. The
maximum allowable power dissipation is P
DMAX = (TJMAX - TA)/ θJA or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4912, see
power derating currents for more information.
Note 4:
Human body model, 100pF discharged through a 1.5k
resistor.
Note 5:
Machine Model, 220pF-240pF discharged through all pins.
Note 6:
Typicals are measured at 25°C and represent the parametric norm.
Note 7:
Limits are guaranteed to National's AOQL (Average Outgoing Quality Level).
Note 8:
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 9:
10 Terminated input.
External Components Description
See (Figure 1)
Components
Functional Description
1.
R
I
Inverting input resistance which sets the closed-loop gain in conjunction with R
f. This resistor also forms a high-
pass filter with C
i at fc = 1/(2πRiCi).
2.
C
I
Input coupling capacitor which blocks the DC voltage at the amplifier's input terminals. Also creates a high-pass
filter with R
i at fc = 1/(2πRiCi). Refer to the section Proper Selection of External Components, for an explanation
of how to determine the value of C
i.
3.
R
f
Feedback resistance which sets the closed-loop gain in conjunction with R
i.
4.
C
S
Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing section for
information concerning proper placement and selection of the supply bypass capacitor.
5.
C
B
Bypass pin capacitor which provides half-supply filtering. Refer to the section, Proper Selection of Proper
Components
, for information concerning proper placement and selection of C
B
6.
C
o
Output coupling capacitor which blocks the DC voltage at the amplifier's output. Forms a high pass filter with R
L at
f
o = 1/(2πRLCo)
www.national.com
4
LM4912
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相关代理商/技术参数 |
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| LM4912MMX/NOPB | 功能描述:IC AMP AUDIO PWR .145W AB 10MSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:Boomer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:H 类 输出类型:耳机，2-通道（立体声） 在某负载时最大输出功率 x 通道数量:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) |
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| LM4913A WAF | 制造商:Texas Instruments 功能描述: |
| LM4913MH | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| LM4913MH/NOPB | 功能描述:IC AMP AUDIO MONO/STER 10TSSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:Boomer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:H 类 输出类型:耳机，2-通道（立体声） 在某负载时最大输出功率 x 通道数量:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) |
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