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LM4953 Datasheet(数据表) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件型号  LM4953
说明  Ground-Referenced, Ultra Low Noise, Ceramic Speaker Driver
下载  11 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
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 4 page
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Electrical Characteristics V
DD = 3.0V (Continued)
The following specifications apply for V
DD = 3.0V, AV-BTL = 6dB, ZL = 2µF+30
Ω unless otherwise specified. Limits apply to T
A =
25˚C. See Figure 1.
Symbol
Parameter
Conditions
LM4953
Units (Limits)
Typ
(Note 6)
Limit
(Notes 7, 8)
V
SDIL
Shutdown Voltage Input Low
SD1
SD2
0.3*CPVdd
V (max)
T
WU
Wake-up Time
125
µsec
V
OS
Output Offset Voltage
1
10
mV (max)
V
OUT
Output Voltage Swing
THD = 1% (max); f = 1kHz
Z
L = 2µF+30
Ω, Mono BTL
10.2
Vpp
THD+N
Total Harmonic Distortion +
Noise
V
OUT = 8.5Vp-p, fIN = 1kHz
0.02
%
OS
Output Noise
A-Weighted Filter, V
IN =0V
15
µV
PSRR
Power Supply Rejection
Ratio
V
RIPPLE = 200mVp-p, f = 217Hz,
Input Referred
73
dB
V
RIPPLE = 200mVp-p, f = 1kHz,
Input Referred
68
dB
SNR
Signal-to-Noise Ratio
Z
L = 2µF+30
Ω,V
OUT = 8.5Vp-p
105
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 that
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 number given in Absolute Maximum Ratings, whichever is lower. For the LM4xxx typical application
(shown in Figure 1) with VDD = yyV, RL = 2µF+30Ω mono BTL operation the total power dissipation is xxxW. θJA = 40˚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: If the product is in shutdown mode and VDD exceeds 3.6V (to a max of 4V VDD), then most of the excess current will flow through the ESD protection circuits.
If the source impedance limits the current to a max of 10mA, then the part will be protected. If the part is enabled when VDD is above 4V, circuit performance will
be curtailed or the part may be permanently damaged.
www.national.com
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