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LM4782TABD bảng dữ liệu(PDF) 4 Page - Texas Instruments

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LM4782, LM4782TABD
SNAS231A – MAY 2004 – REVISED MARCH 2006
www.ti.com
Electrical Characteristics
(1) (2)
The following specifications apply for V
+ = +25V, V- = −25V, and R
L = 8Ω unless otherwise specified. Limits apply for
TA = 25°C.
Symbol
Parameter
Conditions
LM4782
Units
(Limits)
Typical(3)
Limit(4)(5)
20
V (min)
|V+| + |V-|
Power Supply Voltage(6)
GND
− V- ≥ 9.5V
18
64
V (max)
VM
Mute Attenuation
VMUTE = 2.5V
115
80
dB (min)
THD+N = 0.5% (max)
f = 1kHz; f = 20kHz
PO
Output Power (RMS)
|V+| = |V-| = 19V, RL = 4Ω
20
15
W (min)
|V+| = |V-| = 22V, RL = 6Ω
23
20
W (min)
|V+| = |V-| = 25V, RL = 8Ω
25
20
W (min)
PO = 15W, f = 20Hz - 20kHz
AV = 26dB
Total Harmonic Distortion +
THD+N
|V+| = |V-| = 19V, RL = 4Ω
0.4
%
Noise
|V+| = |V-| = 22V, RL = 6Ω
0.3
%
|V+| = |V-| = 25V, RL = 8Ω
0.2
%
PO = 10W, f = 1kHz
70
dB
Xtalk
Channel Separation(7)
PO = 10W, f = 10kHz
60
dB
SR
Slew Rate
VIN = 1.414VRMS, trise = 2ns
18
12
V/
μs (min)
IDD
Total Quiescent Power Supply
VCM = 0V, VO = 0V, IO = 0A
Current
VSTANDBY = GND, Standby = Off
75
120
mA (max)
VSTANDBY = 5V, Standby = On
8
10
mA (max)
VOS
Input Offset Voltage
VCM = 0V, IO = 0mA
2.0
15
mV (max)
IB
Input Bias Current
VCM = 0V, IO = 0mA
0.2
0.5
μA (max)
IO
Output Current Limit
|V+| = |V-| = 10V, tON = 10ms, VO = 0V
3.5
2.9
A (min)
|V+ - VO|, V
+ = 20V, I
O = +100mA
1.8
2.3
V (max)
VOD
Output Dropout Voltage(8)
|VO - V
-|, V-= -20V, I
O = -100mA
2.5
3.2
V (max)
V+ = 25V to 10V, V-= -25V
115
85
dB (min)
VCM = 0V, IO = 0mA
PSRR
Power Supply Rejection Ratio(9)
V+ = 25V, V-= -25V to -10V
110
85
dB (min)
VCM = 0V, IO = 0mA
CMRR
Common Mode Rejection Ratio(9) V+ = 25V to 10V, V-= -10V to -25V
110
80
dB (min)
VCM = 10V to -10V, IO = 0mA
AVOL
Open Loop Voltage Gain
|V+| = |V-| = 25V, RL = 2kΩ
110
90
dB (min)
ΔVO = 20V
GBWP
Gain Bandwidth Product
|V+| = |V-| = 25V, fIN = 100kHz
7.5
5
MHz (min)
VIN = 50mVRMS
eIN
Input Noise
IHF-A-Weighting Filter,
2.0
8
μV (max)
RIN = 600Ω (Input Referred)
(1)
All voltages are measured with respect to the ground pins, unless otherwise specified.
(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 ensured for parameters where no limit is given; however, the typical value is a good indication
of device performance.
(3)
Typical specifications are measured at 25°C and represent the parametric norm.
(4)
Tested limits are ensured to TI's AOQL (Average Outgoing Quality Level).
(5)
Datasheet min/max specification limits are specified by design, test, or statistical analysis.
(6)
V- must have at least - 9.5V at its pin with reference to GND in order for the under-voltage protection circuitry to be disabled. In addition,
the voltage differential between V+ and V-must be greater than 14V.
(7)
Cross talk performance was measured using the demo board shown in the datasheet. PCB layout will affect cross talk. It is
recommended that the input and output traces be separated by as much distance as possible. Return ground traces from outputs should
also be independent back to single ground point and use as wide of traces as possible.
(8)
The output dropout voltage is the supply voltage minus the clipping voltage. Refer to the Clipping Voltage vs. Supply Voltage graph in
the Typical Performance Characteristics section.
(9)
DC electrical test.
4
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