LM3886 Datasheet, PDF (4/31 Pages) National Semiconductor (TI) – Overture TM Audio Power Amplifier Series High-Performance 68W Audio Power Amplifier w/Mute

LM3886
SNAS091C – MAY 1999 – REVISED MARCH 2013
www.ti.com
Electrical Characteristics ⁽¹⁾⁽²⁾
The following specifications apply for V⁺ = +28V, V^− = −28V, I_MUTE = −0.5 mA with R_L = 4Ω unless otherwise specified. Limits
apply for T_A = 25°C.
Parameter
Test Conditions
LM3886
Typical ⁽³⁾ Limit ⁽⁴⁾
Units
(Limits)
|V⁺| + |V^−| Power Supply Voltage ⁽⁵⁾
V_pin7 − V^− ≥ 9V
18
20
V (min)
84
V (max)
A_M
P_O ⁽⁶⁾
Peak P_O
THD + N
SR ⁽⁶⁾
I^{+ (6)}
V_OS ⁽⁸⁾
I_B
I_OS
I_o
V_od ⁽⁸⁾
PSRR ⁽⁸⁾
CMRR ⁽⁸⁾
A_VOL ⁽⁸⁾
GBWP
e_IN ⁽⁶⁾
SNR
IMD
Mute Attenuation
Output Power (Continuous Average)
Instantaneous Peak Output Power
Total Harmonic Distortion Plus Noise
Slew Rate ⁽⁷⁾
Total Quiescent Power Supply Current
Input Offset Voltage
Input Bias Current
Input Offset Current
Output Current Limit
Output Dropout Voltage ⁽⁹⁾
Power Supply Rejection Ratio
Common Mode Rejection Ratio
Open Loop Voltage Gain
Gain-Bandwidth Product
Input Noise
Signal-to-Noise Ratio
Intermodulation Distortion Test
Pin 8 Open or at 0V, Mute: On
Current out of Pin 8 > 0.5 mA,
Mute: Off
THD + N = 0.1% (max)
f = 1 kHz; f = 20 kHz
|V⁺| = |V^−| = 28V, R_L = 4Ω
|V⁺| = |V^−| = 28V, R_L = 8Ω
|V⁺| = |V^−| = 35V, R_L = 8Ω
60W, R_L = 4Ω,
30W, R_L = 8Ω,
20 Hz ≤ f ≤ 20 kHz
A_V = 26 dB
V_IN = 2.0Vp-p, t_RISE = 2 ns
V_CM = 0V, V_o = 0V, I_o = 0A
V_CM = 0V, I_o = 0 mA
V_CM = 0V, I_o = 0 mA
V_CM = 0V, I_o = 0 mA
|V⁺| = |V^−| = 20V, t_ON = 10 ms, V_O = 0V
|V⁺–V_O|, V⁺ = 28V, I_o = +100 mA
|V_O–V^−|, V^− = −28V, I_o = −100 mA
V⁺ = 40V to 20V, V^− = −40V,
V_CM = 0V, I_o = 0 mA
V⁺ = 40V, V^− = −40V to −20V,
V_CM = 0V, I_o = 0 mA
V⁺ = 60V to 20V, V^− = −20V to −60V,
V_CM = 20V to −20V, I_o = 0 mA
|V⁺| = |V^−| = 28V, R_L = 2 kΩ, ΔV_O = 40V
|V⁺| = |V^−| = 30V
f_O = 100 kHz, V_IN = 50 mVrms
IHF—A Weighting Filter
R_IN = 600Ω (Input Referred)
P_O = 1W, A-Weighted,
Measured at 1 kHz, R_S = 25Ω
P_O = 60W, A-Weighted,
Measured at 1 kHz, R_S = 25Ω
60 Hz, 7 kHz, 4:1 (SMPTE)
60 Hz, 7 kHz, 1:1 (SMPTE)
115
80
dB (min)
68
38
50
135
0.03
0.03
19
50
1
0.2
0.01
11.5
1.6
2.5
120
105
110
115
8
2.0
92.5
110
0.004
0.009
60
W (min)
30
W (min)
W
W
%
%
8
V/μs (min)
85
mA (max)
10
mV (max)
1
μA (max)
0.2 μA (max)
7
A (min)
2.0
V (max)
3.0
V (max)
85
dB (min)
85
dB (min)
85
dB (min)
90
dB (min)
2
MHz (min)
10 μV (max)
dB
dB
%
(1) All voltages are measured with respect to the GND pin (pin 7), 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. Electrical Characteristics state DC and AC electrical specifications under particular test conditions and
specific performance limits. This assumes that the device is within the Operating Ratings. The typical value is a good indication of
device performance.
(3) Typicals are measured at 25°C and represent the parametric norm.
(4) Limits are speficied to AOQL (Average Outgoing Quality Level).
(5) V^− must have at least −9V at its pin with reference to ground in order for the under-voltage protection circuitry to be disabled.
(6) AC Electrical Test; refer to Test Circuit #2 -AC Electrical Test Circuit.
(7) The feedback compensation network limits the bandwidth of the closed-loop response and so the slew rate will be reduced due to the
high frequency roll-off. Without feedback compensation, the slew rate is typically larger.
(8) DC Electrical Test; refer to Test Circuit #1- DC Electrical Test Circuit.
(9) The output dropout voltage is the supply voltage minus the clipping voltage. Refer to Figure 14 in Typical Performance Characteristics.
4
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