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LM4985 Folha de dados(PDF) 4 Page - Texas Instruments

Nome de Peças LM4985
Descrição Electrónicos  LAudio Power Amplifier Series Stereo 135mW Low Noise Headphone Amplifier with Selectable Capacitively Coupled
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
Logo TI1 - Texas Instruments

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LM4985, LM4985TMEVAL
SNAS346B – MAY 2006 – REVISED MAY 2006
www.ti.com
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 (VDD, I
2CV
DD)
6.0V
Storage Temperature
−65°C to +150°C
Input Voltage (IN1, IN2, OUT1, OUT2, BYPASS, CNTGND, GND
pins relative to the VDD pin)
-0.3V to VDD + 0.3V
Input Voltage (ADR, SDA, SCL pins, relative to the I2CVDD pin)
-0.3V to I2CVDD + 0.3V
Power Dissipation(3)
Internally Limited
ESD Susceptibility(4)
2000V
ESD Susceptibility(5)
200V
Junction Temperature
150°C
Thermal Resistance
θJA
109°C/W
(1)
All voltages are measured with respect to the GND pin unless otherwise specified.
(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 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.
(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 LM4985, see power derating currents for more information.
(4)
Human Body Model: 100pF discharged through a 1.5k
Ω resistor.
(5)
Machine Model: 200pF
≤ Cmm ≤ 220pF discharged through all pins.
Operating Ratings
Temperature Range
TMIN ≤ TA ≤ TMAX
−40°C ≤ T A ≤ 85°C
VDD
2.3V
≤ VCC ≤ 5.5V
Supply Voltage
I2CVDD
1.7V
≤ I2CVDD ≤ 5.5V
Electrical Characteristics VDD = 5V
(1) (2)
The following specifications apply for RL = 16Ω, f = 1kHz, and CB = 4.7µF unless otherwise specified. Limits apply to TA =
25°C.
Symbol
Parameter
Conditions
LM4985
Units
(Limits)
Typ(3)
Limit(4)(5)
VIN = 0V, IOUT = 0A
Single-Channel no load OCL
2
IDD
Quiescent Power Supply Current
Single-Channel no load C-CUPL
1.5
mA (max)
Dual-Channel no load OCL
3
4.9
Dual-Channel no load C-CUPL
2.3
3.8
ISD
Shutdown Current
VSHUTDOWN = GND
0.1
1.0
µA (max)
VSDIH
Logic Voltage Input High
3.5
V (min)
VSDIL
Logic Voltage Input Low
1.5
V (max)
(1)
All voltages are measured with respect to the GND pin unless otherwise specified.
(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 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.
(3)
Typicals are measured at 25°C and represent the parametric norm.
(4)
Limits are specified to Texas Instruments' AOQL (Average Outgoing Quality Level).
(5)
Datasheet min/max specification limits are specified by design, test, or statistical analysis.
4
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Copyright © 2006, Texas Instruments Incorporated
Product Folder Links: LM4985 LM4985TMEVAL


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