LM4857GR National Semiconductor, LM4857GR Datasheet - Page 11

• Manufacturer Part Number: LM4857GR
• Description: IC AUDIO SUBSYSTEM W/3D 49UBGA
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class ABr

Specifications of LM4857GR

• Output Type: 2-Channel (Stereo) with Mono and Stereo Headphones
• Max Output Power X Channels @ Load: 1.6W x 2 @ 4 Ohm; 75mW x 2 @ 32 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: 3D, Depop, I²C, Mute, Shutdown, Thermal Protection, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 49-Micro-array
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: LM4857GRTR

t
V
V
5
Symbol
IH
IL
Control Interface Electrical Characteristics
The following specifications apply for V
apply for T
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 T
allowable power dissipation is P
3, 8, or 13 with V
Note 4: Human body model, 100pF discharged through a 1.5kΩ 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 and supply current are measured in a normal room environment. All digital input pins are connected to I
Note 10: The given θ
Note 11: “0dB gain” refers to the volume control gain setting of M
Note 12: The given θ
Note 13: The given θ
Stop Condition time
Digital Input High Voltage
Digital Input Low Voltage
A
= 25˚C.
DD
= 5V, 8Ω stereo loudspeakers and 32Ω stereo headphones, the total power dissipation is 1.348W. θ
JA
JA
JA
Parameter
is for an LM4857ITL mounted on a PCB with a 2in
is for an LM4857SP mounted on a PCB with a 2in
is for an LM4857GR mounted on a PCB with a 4in
DMAX
= (T
JMAX
- T
A
DD
) / θ
= 5V and V
JA
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4857 operating in Mode
IN
, L
DD
IN
, and R
= 3V and 2.5V ≤ I
Conditions
2
2
2
area of 1oz printed circuit board ground plane.
area of 1oz printed circuit board copper ground plane.
area of 1oz printed circuit board ground plane.
11
IN
set at 0dB.
(Notes 1, 2) (Continued)
2
CV
DD
JMAX
≤ 5.5V, unless otherwise specified. Limits
, θ
JA
(Note 6)
Typical
, and the ambient temperature, T
LM4857
JA
= 62˚C/W.
Limits (Notes
0.7 x I
0.3 x I
7, 8)
2
100
CV
2
2
CVDD
CV
DD
.
DD
A
. The maximum
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(Limits)
ns (min)
V (max)
V (min)
Units