LM4548A Datasheet, PDF (3/34 Pages) National Semiconductor (TI) – AC ’97 Rev 2 Multi-Channel Audio Codec with Sample Rate Conversion and National 3D Sound

OBSOLETE
LM4548A
www.ti.com
SNOS988D – NOVEMBER 2002 – REVISED APRIL 2013
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
ABSOLUTE MAXIMUM RATINGS ⁽¹⁾⁽²⁾
Supply Voltage
6.0V
Storage Temperature
−65°C to +150°C
Input Voltage
ESD Susceptibility⁽³⁾
−0.3V to V_DD +0.3V
2000V
Pin 3
ESD Susceptibility⁽⁴⁾
750V
200V
Pin 3
100V
Junction Temperature
150°C
Soldering Information
LQFP Package
Vapor Phase (60 sec.)
Infrared (15 sec.)
215°C
220°C
θ_JA (typ) – PT
74°C/W
(1) 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 ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure 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.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(3) Human body model, 100 pF discharged through a 1.5 kΩ resistor.
(4) Machine Model, 220 pF – 240 pF discharged through all pins.
OPERATING RATINGS
Temperature Range
Analog Supply Range
Digital Supply Range
T_MIN ≤ T_A ≤ T_MAX ⁽¹⁾
−40°C ≤ T_A ≤ 85°C
4.2V ≤ AV_DD ≤ 5.5V
3.0V ≤ DV_DD ≤ 5.5V
(1) The maximum power dissipation must be derated at elevated temperatures and is dictated by T_JMAX, θ_JA, and the ambient temperature
T_A. The maximum allowable power dissipation is P_DMAX = (T_JMAX– T_A)/θ_JA or the number given in Absolute Maximum Ratings,
whichever is lower. For the LM4548A, T_JMAX = 150°C. The typical junction-to-ambient thermal resistance is 74°C/W for package number
PT.
ELECTRICAL CHARACTERISTICS ⁽¹⁾⁽²⁾
The following specifications apply for AV_DD = 5V, DV_DD = 5V, Fs = 48 kHz, single codec configuration, unless otherwise
noted. Limits apply for T_A= 25°C. The reference for 0 dB is 1 Vrms unless otherwise specified.
Symbol
Parameter
Conditions
LM4548A
Typical⁽³⁾ Limit⁽⁴⁾
Units
(Limits)
AV_DD
Analog Supply Range
4.2
V (min)
5.5
V (max)
DV_DD
Digital Supply Range
3.0
V (min)
5.5
V (max)
D_IDD
A_IDD
Digital Quiescent Power Supply Current DV_DD = 5 V
DV_DD = 3.3 V
Analog Quiescent Power Supply
Current
43
mA
20
mA
53
mA
I_DSD
Digital Shutdown Current
500
µA
(1) 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 ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure 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.
(2) All voltages are measured with respect to the ground pin, unless otherwise specified.
(3) Typicals are measured at 25°C and represent the parametric norm.
(4) Limits are specified to AOQL (Average Outgoing Quality Level).
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