Datasheet
LM4549B
www.ti.com
SNAS598A –JULY 2012–REVISED MAY 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 −0.3V to V
DD
+0.3V
ESD Susceptibility
(3)
2000V
pin 3 750V
ESD Susceptibility
(4)
200V
pin 3 100V
Junction Temperature 150°C
Soldering Information LQFP Package Vapor Phase (60 sec.) 215°C
Infrared (15 sec.) 220°C
θ
JA
(typ) – PT0048A 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 T
MIN
≤ T
A
≤ T
MAX
(1)
−40°C ≤ T
A
≤ 85°C
Analog Supply Range 4.2V ≤ AV
DD
≤ 5.5V
Digital Supply Range 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 LM4549B, T
JMAX
= 150°C. The typical junction-to-ambient thermal resistance is 74°C/W for package number
PT0048A.
Electrical Characteristics
(1)(2)
The following specifications apply for AV
DD
= 5V, DV
DD
= 3.3V, Fs = 48 kHz, single codec configuration, (primary mode)
unless otherwise noted. Limits apply for T
A
= 25°C. The reference for 0 dB is 1 Vrms unless otherwise specified.
LM4549B
Units
Symbol Parameter Conditions
Typical Limit
(Limits)
(3) (4)
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
Digital Quiescent Power Supply Current DV
DD
= 5 V 34 mA
DV
DD
= 3.3 V 19 mA
Analog Quiescent Power Supply
A
IDD
AV
DD
= 5.5 V 53 mA
Current
(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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