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LM4961 Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de pieza LM4961
Descripción Electrónicos  Ceramic Speaker Driver
Download  16 Pages
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4961 Datasheet(HTML) 4 Page - National Semiconductor (TI)

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Electrical Characteristics V
DD = 3.2V (Continued)
The following specifications apply for V
DD = 3.2V, AV-BTL = 26dB, RL = 2µF+30
Ω, Cb = 1.0µF, Band-SW = V
DD unless other-
wise specified. Limits apply for T
A = 25˚C.
Symbol
Parameter
Conditions
LM4961
Units
(Limits)
Typical
(Note 6)
Limit
(Notes 7, 8)
V
LH
Logic High Threshold Voltage
For Shutdown 1, Shutdown 2, and
Band-SW
1.5
V (min)
V
LL
Logic Low Threshold Voltage
For Shutdown 1, Shutdown 2, and
Band-SW
0.4
V (max)
R
PULLDOWN
Pulldown Resistor
For Shutdown 2 and Band-SW
70k
50k
Ω (min)
TSD
Thermal Shutdown Temperature
125
˚C (min)
V
out
Output Voltage Swing
THD = 1%, f = 1kHz
R
L = 2µF+30
Ω Mono BTL
15
14
Vp-p (min)
THD+N
Total Harmomic Distortion + Noise
V
out = 14Vp-p, f = 1kHz
0.1
1.0
% (max)
e
OS
Output Noise
A-Weighted Filter, V
IN = 0V (Note
10)
125
µV
PSRR
Power Supply Rejection Ratio
V
RIPPLE = 200mVp-p, f = 100Hz
80
65
dB (min)
Ron-sw-out
On Resistance on SW-Out
Band SW “High” Isink = 100µA
(Between pin 1 and pin 28)
170
220
Ω (max)
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, θJA, and the ambient temperature, TA. The maximum
allowable power dissipation is PDMAX =(TJMAX −TA)/ θJA or the given in Absolute Maximum Ratings, whichever is lower. For the LM4961 typical application (shown
in Figure 1) with VDD = 4.2V, RL = 2µF+30Ω mono BTL operation the maximum power dissipation is 232mW. θJA = 66˚C/W.
Note 4: Human body model, 100pF discharged through a 1.5k
Ω 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: Shutdown current is measured in a normal room environment. The Shutdown pin should be driven as close as possible to GND for minimum shutdown
current.
Note 10: Noise measurements are dependent on the absolute values of closed loop gain setting resistors (input and feedback resistors).
www.national.com
4


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