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LM4985TMEVAL Folha de dados(PDF) 7 Page - Texas Instruments

Nome de Peças LM4985TMEVAL
Descrição Electrónicos  LAudio Power Amplifier Series Stereo 135mW Low Noise Headphone Amplifier with Selectable Capacitively Coupled
Download  33 Pages
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
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LM4985TMEVAL Folha de dados(HTML) 7 Page - Texas Instruments

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LM4985, LM4985TMEVAL
www.ti.com
SNAS346B – MAY 2006 – REVISED MAY 2006
Electrical Characteristics VDD = 3.6V
(1)(2) (continued)
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)
CBYPASS= 4.7μF
(7)
WT1 = 0, WT0 = 0
OCL
66
93
C-CUPL
222
WT1 = 0, WT0 = 1
OCL
92
TWU
Wake Up Time from Shutdown
C-CUPL
405
msec
WT1 = 1, WT0 = 0
OCL
143
C-CUPL
774
WT1 = 1, WT0 =1
OCL
246
C-CUPL
1532
Stereo mode
20
RIN
Input Resistance
k
Mono mode
10
AVMIN
Minimum Gain
Code = 00000
–76
–72
dB (max)
AVMAX
Maximum Gain
Code = 11111
18
17
dB (min)
18dB
≥ AV ≥–44dB
± 0.5
± 1.0
ΔAV
Gain Accuracy per Step
dB
–44dB
≥ AV > –76dB
± 1.0
± 2.0
OCL
VOS
Output Offset Voltage
RLOAD = 32Ω
2.0
20
mV (max)
VIN = AC GND
(7)
The wake-up time (TWU) is calculated using the following formula; TWU = [CBYPASS (VDD) / 2 (IBYPASS)] + 40ms.
Electrical Characteristics VDD = 2.5V
(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
1.6
IDD
Quiescent Power Supply Current
Single-Channel no load C-CUPL
1
mA
Dual-Channel no load OCL
2.1
Dual-Channel no load C-CUPL
1.6
ISD
Shutdown Current
VSHUTDOWN = GND
0.1
µA
VSDIH
Logic Voltage Input High
1.75
V (min)
VSDIL
Logic Voltage Input Low
0.75
V (max)
THD+N < 1%, fIN = 1kHz
RLOAD = 16Ω OCL
31
PO
Output Power
RLOAD = 16Ω C-CUPL
33
mW
RLOAD = 32Ω OCL
19
RLOAD = 32Ω C-CUPL
19
(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.
Copyright © 2006, Texas Instruments Incorporated
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