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LM4947 bảng dữ liệu(PDF) 7 Page - Texas Instruments

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tên linh kiện LM4947
Giải thích chi tiết về linh kiện  Mono Class D and Stereo Audio Sub-System
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LM4947 bảng dữ liệu(HTML) 7 Page - Texas Instruments

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LM4947, LM4947TLEVAL
www.ti.com
SNAS349D – JUNE 2006 – REVISED MAY 2013
ELECTRICAL CHARACTERISTICS 5V
(1) (2)
The following specifications apply for VDD = 5V, TA = 25°C and all gains are set for 0dB unless otherwise specified.
Symbol
Parameter
Conditions
LM4947
Units
(Limits)
Typical(3)
Limits(4)
Output Modes 2, 4, 6
VIN = 0V; No load,
5.4
7.5
mA
OCL = 0 (Table 2)
IDDQ
Quiescent Supply Current
Output Modes 1, 3, 5, 7
VIN = 0V; No load, BTL,
7.6
12
mA
OCL = 0 (Table 2)
ISD
Shutdown Current
Output Mode 0
0.1
1
µA (max)
VIN = 0V, Mode 7, Mono
2
15
mV
(max)
VOS
Output Offset Voltage
VIN = 0V, Mode 7, Headphones
2
15
mV
(max)
MONOOUT; RL = 8Ω
1.19
W
THD+N = 1%; f = 1kHz, BTL, Mode 1
PO
Output Power
ROUT and LOUT; RL = 32Ω
87
mW
THD+N = 1%; f = 1kHz, SE, Mode 4
MONOOUT
f = 1kHz, POUT = 500mW;
0.04
%
RL = 8Ω, BTL, Mode 1
THD+N
Total Harmonic Distortion + Noise
ROUT and LOUT
f = 1kHz, POUT = 30mW;
0.01
%
RL = 32Ω, SE, Mode 4
A-weighted, 0dB
inputs terminated, output referred
Speaker; Mode 1
38
μV
Speaker; Mode 3
38
μV
Speaker; Mode 5
39
μV
Speaker; Mode 7
36
μV
NOUT
Output Noise
Headphone; SE, Mode 2
21
μV
Headphone; SE, Mode 4
21
μV
Headphone; SE, Mode 6
24
μV
Headphone; OCL, Mode 2
16
μV
Headphone; OCL, Mode 4
16
μV
Headphone; OCL, Mode 6
19
μV
(1)
Operating Ratings indicate conditions for which the device is functional, but do not ensure specific performance limits. For ensured
specifications and test conditions, see the Electrical Characteristics. The ensured specifications apply only for the test conditions listed.
Some performance characteristics may degrade when the device is not operated under the listed test conditions.
(2)
All voltages are measured with respect to the ground pin, unless otherwise specified.
(3)
Typical specifications are specified at +25°C and represent the most likely parametric norm.
(4)
Tested limits are specified to AOQL (Average Outgoing Quality Level).
Copyright © 2006–2013, Texas Instruments Incorporated
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