LM4855LQBD National Semiconductor, LM4855LQBD Datasheet - Page 6

no-image

LM4855LQBD

Manufacturer Part Number
LM4855LQBD
Description
BOARD EVALUATION LM4855LQ
Manufacturer
National Semiconductor
Series
Boomer®r
Datasheets

Specifications of LM4855LQBD

Amplifier Type
Class AB
Output Type
1-Channel (Mono) with Stereo Headphones
Max Output Power X Channels @ Load
1.5W x 1 @ 4 Ohms; 115mW x 2 @ 32 Ohms
Voltage - Supply
2.6 V ~ 5 V
Operating Temperature
-40°C ~ 85°C
Board Type
Fully Populated
Utilized Ic / Part
LM4855
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
www.national.com
t
t
t
t
t
t
t
t
t
f
SD
ES
EH
EL
DS
DH
CS
CH
CL
CLK
Symbol
Electrical Characteristics
The following specifications apply for V
Note 2: Absolute Maximum Rating indicate limits beyond which damage to the device may occur.
Note 3: Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and
test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may
degrade when the device is not operated under the listed test conditions.
Note 4: Human body model, 100pF discharged through a 1.5kΩ resistor.
Note 5: Typical specifications are specified at +25˚C and represent the most likely parametric norm.
Note 6: Tested limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 7: Machine Model ESD test is covered by specification EIAJ IC-121-1981. A 200pF cap is charged to the specified voltage, then discharged directly into the
IC with no external series resistor (resistance of discharge path must be under 50Ω).
Note 8: All voltages are measured with respect to the ground pin, unless otherwise specified.
Note 9: The given θ
Note 10: Please refer to the Output Noise vs Output Mode table in the Typical Performance Characteristics section for more details.
Digital Volume Range (R
L
Digital Volume Stepsize
Digital Volume Stepsize Error
Phone_In_IHF Volume
Phone _In_IHF Mute Attenuation
Phone_In_IHF Input Impedance
Phone_In_HS Input Impedance
R
Thermal Shutdown Temperature
Enable Setup Time (ENB)
Enable Hold Time (ENB)
Enable Low Time (ENB)
Data Setup Time (DATA)
Data Hold Time (DATA)
Clock Setup Time (CLK)
Clock Logic High Time (CLK)
Clock Logic Low Time (CLK)
Clock Frequency
IN
IN
)
and L
JA
and θ
IN
Parameter
Input Impedance
JC
are for an LM4855 mounted on a demonstration board with a 4in
IN
and
DD
= 3.0V, T
(Notes 2, 8) (Continued)
Input referred minimum gain
Input referred maximum gain
BTL gain from Phone_In _IHF to
SPKR
Output Mode 2, 4, 6
Maximum gain setting
Mininum gain setting
Maximum gain setting
Mininum gain setting
OUT
A
= 25˚C unless otherwise specified.
Conditions
6
2
area of 1oz printed circuit board copper ground plane.
(Note 5)
Typical
-34.5
±
12.0
33.5
100
100
170
1.5
12
80
20
50
0.1
LM4855
(Note 6)
Limits
-35.1
-33.9
11.4
12.6
±
11.4
12.6
37.5
62.5
125
125
150
DC
72
15
25
75
25
42
75
20
20
30
20
20
20
50
50
10
0.6
MHz (max)
dB ( max)
dB (max)
dB (max)
dB (max)
kΩ (max)
kΩ (max)
kΩ (max)
kΩ (max)
kΩ (max)
dB (min)
dB (min)
dB (min)
dB (min)
kΩ (min)
kΩ (min)
kΩ (min)
kΩ (min)
kΩ (min)
(Limits)
˚C (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
Units
(min)
dB

Related parts for LM4855LQBD